Biggest changeNon-GAAP income or loss before income taxes is then adjusted for income taxes calculated using the respective statutory tax rates for applicable jurisdictions, which for purposes of this determination were assumed to be 25.5%. We encourage investors and others to review our financial information in its entirety, not to rely on any single financial measure and to view these non-GAAP financial measures in conjunction with the related GAAP financial measures. 46 Table of Contents The following schedules reflect our additional non-GAAP financial measures and reconciles our additional non-GAAP financial measures to the related GAAP financial measures. For the year ended December 31, (Dollars in thousands) 2023 2022 Non-GAAP cost of revenues, software subscriptions $ 106,038 $ 95,047 Non-GAAP cost of revenues, services $ 59,042 $ 49,628 Non-GAAP gross profit $ 407,307 $ 346,949 Non-GAAP gross margin 71.2 % 70.6 % Non-GAAP research and development expense $ 52,218 $ 40,079 Non-GAAP selling and marketing expense $ 129,216 $ 115,272 Non-GAAP general and administrative expense $ 124,925 $ 112,650 Non-GAAP operating income $ 85,646 $ 66,233 Non-GAAP net income $ 63,699 $ 47,818 For the year ended December 31, (Dollars in thousands) 2023 2022 Non-GAAP Cost of Revenues, Software Subscriptions: Cost of revenues, software subscriptions $ 162,920 $ 142,071 Stock-based compensation expense (2,834) (2,090) Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues (54,048) (44,934) Non-GAAP cost of revenues, software subscriptions $ 106,038 $ 95,047 Non-GAAP Cost of Revenues, Services: Cost of revenues, services $ 60,888 $ 51,061 Stock-based compensation expense (1,846) (1,433) Non-GAAP cost of revenues, services $ 59,042 $ 49,628 Non-GAAP Gross Profit: Gross profit $ 348,579 $ 298,492 Stock-based compensation expense 4,680 3,523 Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues 54,048 44,934 Non-GAAP gross profit $ 407,307 $ 346,949 Non-GAAP Gross Margin: Total revenues $ 572,387 $ 491,624 Non-GAAP gross margin 71.2 % 70.6 % Non-GAAP Research and Development Expense: Research and development expense $ 58,212 $ 41,877 Stock-based compensation expense (5,994) (1,798) Non-GAAP research and development expense $ 52,218 $ 40,079 Non-GAAP Selling and Marketing Expense: Selling and marketing expense $ 140,237 $ 125,335 Stock-based compensation expense (8,380) (6,284) Amortization of acquired intangible assets – selling and marketing expense (2,641) (3,779) Non-GAAP selling and marketing expense $ 129,216 $ 115,272 47 Table of Contents For the year ended (Dollars in thousands) December 31, 2023 2022 Non-GAAP General and Administrative Expense: General and administrative expense $ 145,936 $ 121,651 Stock-based compensation expense (14,865) (8,124) Severance expense (3,576) (877) Amortization of cloud computing implementation costs – general and administrative (2,570) — Non-GAAP general and administrative expense $ 124,925 $ 112,650 Non-GAAP Operating Income: Loss from operations $ (17,510) $ (8,082) Stock-based compensation expense 33,919 19,729 Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues 54,048 44,934 Amortization of acquired intangible assets – selling and marketing expense 2,641 3,779 Amortization of cloud computing implementation costs – general and administrative 2,570 — Severance expense 3,576 877 Acquisition contingent consideration 1,549 2,300 Litigation settlement — 2,000 Transaction costs (1) 4,853 696 Non-GAAP operating income $ 85,646 $ 66,233 Non-GAAP Net Income: Net loss $ (13,093) $ (12,304) Income tax expense (benefit) (8,581) 2,174 Stock-based compensation expense 33,919 19,729 Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues 54,048 44,934 Amortization of acquired intangible assets – selling and marketing expense 2,641 3,779 Amortization of cloud computing implementation costs – general and administrative 2,570 — Severance expense 3,576 877 Acquisition contingent consideration 1,549 2,300 Litigation settlement — 2,000 Transaction costs (1) 4,853 696 Change in settlement value of deferred purchase commitment liability – interest expense 4,020 — Non-GAAP income before income taxes 85,502 64,185 Income tax adjustment at statutory rate (21,803) (16,367) Non-GAAP net income $ 63,699 $ 47,818 (1) The year ended December 31, 2023 includes costs associated with a public tender offer, which was withdrawn by the Company on January 14, 2024.
Biggest changeNon-GAAP income or loss before income taxes is then adjusted for income taxes calculated using the respective statutory tax rates for applicable jurisdictions, which for purposes of this determination were assumed to be 25.5%. We encourage investors and others to review our financial information in its entirety, not to rely on any single financial measure and to view these non-GAAP financial measures in conjunction with the related GAAP financial measures. The following schedules reflect our additional non-GAAP financial measures and reconciles our additional non-GAAP financial measures to the related GAAP financial measures. For the year ended December 31, 2024 2023 (Dollars in thousands) Non-GAAP cost of revenues, software subscriptions $ 111,929 $ 106,038 Non-GAAP cost of revenues, services $ 62,303 $ 59,042 Non-GAAP gross profit $ 492,544 $ 407,307 Non-GAAP gross margin 73.9 % 71.2 % Non-GAAP research and development expense $ 56,395 $ 52,218 Non-GAAP selling and marketing expense $ 154,892 $ 129,216 Non-GAAP general and administrative expense $ 128,224 $ 124,925 Non-GAAP operating income $ 130,989 $ 85,646 Non-GAAP net income $ 100,984 $ 63,699 For the year ended December 31, (Dollars in thousands) 2024 2023 Non-GAAP Cost of Revenues, Software Subscriptions: Cost of revenues, software subscriptions $ 175,580 $ 162,920 Stock-based compensation expense (4,349) (2,834) Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues (59,302) (54,048) Non-GAAP cost of revenues, software subscriptions $ 111,929 $ 106,038 Non-GAAP Cost of Revenues, Services: Cost of revenues, services $ 65,071 $ 60,888 Stock-based compensation expense (2,768) (1,846) Non-GAAP cost of revenues, services $ 62,303 $ 59,042 50 Table of Contents For the year ended December 31, (Dollars in thousands) 2024 2023 Non-GAAP Gross Profit: Gross profit $ 426,125 $ 348,579 Stock-based compensation expense 7,117 4,680 Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues 59,302 54,048 Non-GAAP gross profit $ 492,544 $ 407,307 Non-GAAP Gross Margin: Total revenues $ 666,776 $ 572,387 Non-GAAP gross margin 73.9 % 71.2 % Non-GAAP Research and Development Expense: Research and development expense $ 66,666 $ 58,212 Stock-based compensation expense (9,548) (5,994) Transaction costs (723) — Non-GAAP research and development expense $ 56,395 $ 52,218 Non-GAAP Selling and Marketing Expense: Selling and marketing expense $ 170,574 $ 140,237 Stock-based compensation expense (13,204) (8,380) Amortization of acquired intangible assets – selling and marketing expense (2,478) (2,641) Non-GAAP selling and marketing expense $ 154,892 $ 129,216 Non-GAAP General and Administrative Expense: General and administrative expense $ 152,835 $ 145,936 Stock-based compensation expense (17,556) (14,865) Severance expense (3,048) (3,576) Amortization of cloud computing implementation costs – general and administrative (4,007) (2,570) Non-GAAP general and administrative expense $ 128,224 $ 124,925 Non-GAAP Operating Income: Loss from operations $ (2,228) $ (17,510) Stock-based compensation expense 47,425 33,919 Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues 59,302 54,048 Amortization of acquired intangible assets – selling and marketing expense 2,478 2,641 Amortization of cloud computing implementation costs – general and administrative 4,007 2,570 Severance expense 3,048 3,576 Acquisition contingent consideration (2,575) 1,549 Change in fair value of acquisition contingent earn-outs 17,500 — Transaction costs 2,032 4,853 Non-GAAP operating income $ 130,989 $ 85,646 51 Table of Contents For the year ended December 31, (Dollars in thousands) 2024 2023 Non-GAAP Net Income: Net loss $ (52,729) $ (13,093) Income tax expense (benefit) 54,638 (8,581) Stock-based compensation expense 47,425 33,919 Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues 59,302 54,048 Amortization of acquired intangible assets – selling and marketing expense 2,478 2,641 Amortization of cloud computing implementation costs – general and administrative 4,007 2,570 Severance expense 3,048 3,576 Acquisition contingent consideration (2,575) 1,549 Change in fair value of acquisition contingent earn-outs 17,500 — Transaction costs (1) 2,032 4,853 Change in settlement value of deferred purchase commitment liability – interest expense 423 4,020 Non-GAAP income before income taxes 135,549 85,502 Income tax adjustment at statutory rate (2) (34,565) (21,803) Non-GAAP net income $ 100,984 $ 63,699 (1) The year ended December 31, 2023 includes costs associated with a public tender offer, which was withdrawn by the Company in January 2024.
We derive the majority of our revenue from software subscriptions. These subscriptions include use of our software and ongoing monthly content updates. Our software is offered on a subscription basis to our customers, regardless of their deployment preferences. On-premise subscriptions are typically sold through one-year contracts and cloud-based subscriptions are typically sold through one- to three-year contracts.
We derive the majority of our revenue from software subscriptions. These subscriptions include use of our software and ongoing monthly content updates. Our software is offered on a subscription basis to our customers, regardless of their deployment preferences. On-premise subscriptions and cloud-based subscriptions are typically sold through one- to three-year contracts.
In determining our annualized effective income tax rates, net deferred tax assets, valuation allowances, and cash paid for income taxes, we are required to make judgments and estimates about domestic and foreign profitability, the timing and usage of net operating loss carryforwards, applicable tax rates, and transfer pricing methodologies.
In determining our annualized effective income tax rates, net deferred tax assets, valuation allowances, and cash paid for income taxes, we are required to make judgments and estimates about domestic and foreign profitability, the timing and usage of net operating loss and credit carryforwards, applicable tax rates, and transfer pricing methodologies.
Also, we expect to have access to additional sources of funds in the capital markets, and we may, from time to time, seek additional capital through a combination of additional debt and/or equity financings. If we were to raise additional funds by issuing equity securities, our stockholders may experience dilution.
We expect to have access to additional sources of funds in the capital markets, and we may, from time to time, seek additional capital through a combination of additional debt and/or equity financings. If we were to raise additional funds by issuing equity securities, our stockholders may experience dilution.
As enterprise and mid-market companies continue to expand their business operations—both through their product and service offerings and their global footprint—we expect demand for our tax solutions to increase due to the fact that legacy solutions such as spreadsheets, manual processes, native ERP functionality, or home-built solutions are error prone, inefficient, and cannot scale.
As enterprise and mid-market companies continue to expand their business operations—both through their product and service offerings and their global footprint—we expect demand for our tax and e-invoicing solutions to increase due to the fact that legacy solutions such as spreadsheets, manual processes, native ERP functionality, or home-built solutions are error prone, inefficient, and cannot scale.
Factors that could cause or contribute to these differences include those discussed below and elsewhere in this Annual Report on Form 10-K, particularly in the sections titled “Risk Factors” and “Special Note Regarding Forward-Looking Statements.” T his section of this Annual Report on Form 10-K generally discusses 2023 and 2022 items and year-to-year comparisons between 2023 and 2022.
Factors that could cause or contribute to these differences include those discussed below and elsewhere in this Annual Report on Form 10-K, particularly in the sections titled “Risk Factors” and “Special Note Regarding Forward-Looking Statements.” T his section of this Annual Report on Form 10-K generally discusses 2024 and 2023 items and year-to-year comparisons between 2024 and 2023.
For a summary of our significant accounting policies, see Note 1 to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K. Revenue Recognition We account for our revenue in accordance with Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers , which requires judgment and the use of estimates.
For a summary of our significant accounting policies, see Note 1,“Summary of Significant Accounting Policies” to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K. Revenue Recognition We account for our revenue in accordance with Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers , which requires judgment and the use of estimates.
Discussions of 2021 items and year-to-year comparisons between 2022 and 2021 are not included in this Annual Report on Form 10-K, and can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.
Discussions of 2022 items and year-to-year comparisons between 2023 and 2022 are not included in this Annual Report on Form 10-K, and can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.
In addition, our managed services offering experienced a $4.1 million increase in recurring services revenues over the prior year due to returns processing volume increases related to regulatory changes as customers expanded their tax filings into more jurisdictions.
In addition, our managed services offering experienced a $5.4 million increase in recurring services revenues over the prior year due to returns processing volume increases related to regulatory changes as customers expanded their tax filings into more jurisdictions.
For the years ended December 31, 2023, 2022, and 2021, approximately 4%, 3%, and 4% of our revenues were generated in currencies other than U.S. dollars in each respective period.
For the years ended December 31, 2024, 2023, and 2022, approximately 4%, 4%, and 3% of our revenues were generated in currencies other than U.S. dollars in each respective period.
With the pace of change in commerce and compliance, we believe it is important to continue innovating and extending the functionality and breadth of our software. We plan to continue 30 Table of Contents investing to further enhance our content and the speed and usability of our software. Historically such innovation has been accomplished through internal development efforts.
With the pace of change in commerce and compliance, we believe it is important to continue innovating and extending the functionality and breadth of our software. We plan to continue investing to further enhance our content and the speed and usability of our software. Historically such innovation has been accomplished through internal development efforts.
Many of our customers are enterprise and large corporations and their purchase patterns can be sensitive to timing of budget decisions. Depending on such timing, these decisions can create volatility in the amount of business transacted by our sales team and the amount of revenues recorded in each quarter.
Many of our customers are enterprise and large corporations and their purchase patterns can be sensitive to timing of budget decisions. 42 Table of Contents Depending on such timing, these decisions can create volatility in the amount of business transacted by our sales team and the amount of revenues recorded in each quarter.
We have historically recognized immaterial amounts of foreign currency gains and losses in each of the periods presented. We may in the future hedge selected significant transactions denominated in currencies other than the U.S. dollar as we expand our international operations and our risk grows.
We have historically recognized immaterial 54 Table of Contents amounts of foreign currency gains and losses in each of the periods presented. We may in the future hedge selected significant transactions denominated in currencies other than the U.S. dollar as we expand our international operations and our risk grows.
Vertex provides cloud-based and on-premise solutions that can be tailored to specific industries for every major line of indirect tax, including sales and consumer use, value added, and payroll. Headquartered in North America, and with offices in South America and Europe, Vertex employs over 1,500 professionals and serves companies across the globe.
Vertex provides cloud-based and on-premise solutions that can be tailored to specific industries for every major line of indirect tax, including sales and consumer use, value added (including e-invoicing), and payroll. Headquartered in North America, and with offices in South America and Europe, Vertex employs over 1,900 professionals and serves companies across the globe.
This increase was primarily driven by a $9.4 million increase in costs of service delivery personnel to support revenue growth in software-subscription related services and our managed services offering. In addition, this amount includes an increase in stock-based compensation of $0.4 million for the twelve months ended December 31, 2023 over the same period in 2022.
This increase was primarily driven by a $3.3 million increase in costs of service delivery personnel to support revenue growth in software-subscription related services and our managed services offering. In addition, this amount includes an increase in stock-based compensation of $0.9 million for the twelve months ended December 31, 2024, over the same period in 2023.
Revenue is recognized net of allowance for subscription and non-renewal cancellations and any taxes collected from customers that are subsequently remitted to governmental authorities. Software Subscriptions Licenses for on-premise software subscriptions, which are generally one year, provide the customer with a right to use the software as it exists when made available to the customer.
Revenue is recognized net of allowance for subscription and non-renewal cancellations and any taxes collected from customers that are subsequently remitted to governmental authorities. Software Subscriptions Licenses for on-premise software subscriptions provide the customer with a right to use the software as it exists when made available to the customer.
Additional Non-GAAP Financial Measures In addition to Adjusted EBITDA, Adjusted EBITDA margin, free cash flow, and free cash flow margin calculated and discussed in “Key Business Metrics,” the following additional non-GAAP financial measures are calculated and presented further below: 45 Table of Contents ● Non-GAAP cost of revenues, software subscriptions is determined by adding back to GAAP cost of revenues, software subscriptions, the stock-based compensation expense, and depreciation and amortization of capitalized software and acquired intangible assets included in cost of subscription revenues for the respective periods. ● Non-GAAP cost of revenues, services is determined by adding back to GAAP cost of revenues, services, the stock-based compensation expense included in cost of revenues, services for the respective periods. ● Non-GAAP gross profit is determined by adding back to GAAP gross profit the stock-based compensation expense, and depreciation and amortization of capitalized software and acquired intangible assets included in cost of subscription revenues for the respective periods. ● Non-GAAP gross margin is determined by dividing non-GAAP gross profit by total revenues for the respective periods. ● Non-GAAP research and development expense is determined by adding back to GAAP research and development expense the stock-based compensation expense included in research and development expense for the respective periods. ● Non-GAAP selling and marketing expense is determined by adding back to GAAP selling and marketing expense the stock-based compensation expense and the amortization of acquired intangible assets included in selling and marketing expense for the respective periods. ● Non-GAAP general and administrative expense is determined by adding back to GAAP general and administrative expense the stock-based compensation expense, amortization of cloud computing implementation costs and severance expense included in general and administrative expense for the respective periods. ● Non-GAAP operating income is determined by adding back to GAAP loss or income from operations the stock-based compensation expense, depreciation and amortization of capitalized software and acquired intangible assets included in cost of subscription revenues, amortization of acquired intangible assets included in selling and marketing expense, amortization of cloud computing implementation costs in general and administrative expense, severance expense, acquisition contingent consideration, litigation settlements, and transaction costs , included in GAAP loss or income from operations for the respective periods. ● N on-GAAP net income is determined by adding back to GAAP net loss or income the income tax benefit or expense, stock-based compensation expense, depreciation and amortization of capitalized software and acquired intangible assets included in cost of subscription revenues, amortization of acquired intangible assets included in selling and marketing expense, amortization of cloud computing implementation costs in general and administrative expense, severance expense, acquisition contingent consideration, adjustments to the settlement value of deferred purchase commitment liabilities recorded as interest expense, litigation settlements, and transaction costs , included in GAAP net loss or income for the respective periods to determine non-GAAP loss or income before income taxes.
Additional Non-GAAP Financial Measures In addition to Adjusted EBITDA, Adjusted EBITDA margin, free cash flow, and free cash flow margin calculated and discussed in “Key Business Metrics,” the following additional non-GAAP financial measures are calculated and presented further below: ● Non-GAAP cost of revenues, software subscriptions is determined by adding back to GAAP cost of revenues, software subscriptions, the stock-based compensation expense, and depreciation and amortization of capitalized software and acquired intangible assets included in cost of subscription revenues for the respective periods. ● Non-GAAP cost of revenues, services is determined by adding back to GAAP cost of revenues, services, the stock-based compensation expense included in cost of revenues, services for the respective periods. ● Non-GAAP gross profit is determined by adding back to GAAP gross profit the stock-based compensation expense, and depreciation and amortization of capitalized software and acquired intangible assets included in cost of subscription revenues for the respective periods. ● Non-GAAP gross margin is determined by dividing non-GAAP gross profit by total revenues for the respective periods. ● Non-GAAP research and development expense is determined by adding back to GAAP research and development expense the stock-based compensation expense, and transaction costs related to acquired technology included in research and development expense for the respective periods. ● Non-GAAP selling and marketing expense is determined by adding back to GAAP selling and marketing expense the stock-based compensation expense and the amortization of acquired intangible assets included in selling and marketing expense for the respective periods. ● Non-GAAP general and administrative expense is determined by adding back to GAAP general and administrative expense the stock-based compensation expense, amortization of cloud computing implementation costs and severance expense included in general and administrative expense for the respective periods. ● Non-GAAP operating income is determined by adding back to GAAP loss or income from operations the stock-based compensation expense, depreciation and amortization of capitalized software and acquired intangible assets included in cost of subscription revenues, amortization of acquired intangible assets included in selling and marketing expense, amortization of cloud computing implementation costs in general and administrative expense, severance expense, acquisition contingent consideration, changes in the fair 49 Table of Contents value of acquisition contingent earn-outs , and transaction costs , included in GAAP loss or income from operations for the respective periods. ● N on-GAAP net income is determined by adding back to GAAP net income or loss the income tax benefit or expense, stock-based compensation expense, depreciation and amortization of capitalized software and acquired intangible assets included in cost of subscription revenues, amortization of acquired intangible assets included in selling and marketing expense, amortization of cloud computing implementation costs in general and administrative expense, severance expense, acquisition contingent consideration, changes in the fair value of acquisition contingent earn-outs , adjustments to the settlement value of deferred purchase commitment liabilities recorded as interest expense, and transaction costs , included in GAAP net income or loss for the respective periods to determine non-GAAP loss or income before income taxes.
General and Administrative General and administrative expenses consist primarily of personnel and related expenses for administrative, finance, information technology, legal, risk management, facilities, and human resources staffing, including salaries, benefits, bonuses, severance, stock-based compensation, professional fees, insurance premiums, facility costs, amortization of cloud computing arrangement implementation costs related to our ERP modernization initiative, and other internal support and infrastructure costs.
General and Administrative General and administrative expenses consist primarily of personnel and related expenses for administrative, finance, information technology, legal, risk management, facilities, and human resources staffing, including salaries, benefits, bonuses, severance, stock-based compensation, professional fees, insurance premiums, facility costs, amortization of cloud computing arrangement implementation costs, and other internal support and infrastructure costs.
This increase was primarily driven by a $12.1 million increase in costs of personnel supporting period-over-period growth of sales and customers, and ongoing hosting and infrastructure investments to support expansion of customer transaction volumes for our cloud-based subscription customers.
This increase was primarily driven by a $5.9 million increase in costs of personnel supporting period-over-period growth of sales and customers, and ongoing hosting and infrastructure investments to support expansion of customer transaction volumes for our cloud-based subscription customers.
Customer funds obligations are reported as a current liability on our consolidated balance sheets as the obligations are expected to be settled within one year. Cash flows related to changes in customer funds obligations are presented as cash flows from financing activities. 41 Table of Contents Contractual Obligations and Commitments .
Customer funds obligations are reported as a current liability on our consolidated balance sheets as the obligations are expected to be settled within one year. Cash flows related to changes in customer funds obligations are presented as cash flows from financing activities. Contractual Obligations and Commitments .
Cost of software subscriptions revenue also includes amortization associated with direct labor and related expenses for capitalized internal-use software for cloud-based subscription solutions and software developed for sale for new products and enhancements to existing products, and costs associated with the amortization of certain acquired intangible assets.
Cost of software subscriptions revenue also includes amortization associated with capitalized internal-use software for cloud-based subscription solutions and software developed for sale for new products and enhancements to existing products, and costs associated with the amortization of certain acquired intangible assets.
See Note 3, Business Combinations to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K for a discussion of our acquisitions. Customer migration to cloud solutions. Over time, we expect a continued shift to our cloud solutions by our existing and newly acquired customers.
Refer to Note 3, “Acquisitions” to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K for a discussion of our acquisitions. Customer migration to cloud solutions. Over time, we expect a continued shift to our cloud solutions by our existing and newly acquired customers.
In addition, revenue will fluctuate with the cessation of extended product support fees charged for older versions of our software subscription solutions when they are retired and these fees are no longer charged. Contracts for on-premise licenses permit cancellations at the end of the license term, which is generally one year.
In addition, revenue will fluctuate with the cessation of extended product support fees charged for older versions of our software subscription solutions when they are retired and these fees are no longer charged. Contracts for on-premise licenses permit cancellations at the end of the license term.
In addition, this included an increase of $0.4 million in advertising and promotional spending related to expanded brand awareness efforts. Lastly, there was an increase in stock-based compensation of $2.1 million.
In addition, this included an increase of $10.0 million in advertising and promotional spending related to expanded brand awareness efforts. Lastly, there was an increase in stock-based compensation of $4.8 million.
Judgments and estimates related to our projections and assumptions are inherently uncertain; therefore, actual results could materially differ from our projections. Our subsidiaries in foreign jurisdictions are generally taxed at the corporate level, and the income tax provision or benefit is based on the income or loss sourced to these foreign jurisdictions at the tax rates applicable in those jurisdictions. 34 Table of Contents Results of Operations You should read the following discussion and analysis of our financial condition and results of operations in conjunction with the consolidated financial statements and the notes thereto beginning on page F-1 of this Annual Report on Form 10-K.
Judgments and estimates related to our projections and assumptions are inherently uncertain; therefore, actual results could materially differ from our projections. Vertex and its subsidiaries are generally taxed at the corporate level, and the income tax provision or benefit is based on the income or loss sourced to the U.S. federal and state jurisdictions as well as foreign jurisdictions at the tax rates applicable in those jurisdictions. 37 Table of Contents Results of Operations You should read the following discussion and analysis of our financial condition and results of operations in conjunction with the consolidated financial statements and the notes thereto beginning on page F-1 of this Annual Report on Form 10-K.
We believe that our existing cash resources and our Line of Credit will be sufficient to meet our capital requirements and fund our operations for the next 12 months as well as our longer-term liquidity needs.
Material Future Cash Obligations and Commercial Commitments Cash Requirements. We believe that our existing cash resources and our Line of Credit will be sufficient to meet our capital requirements and fund our operations for the next 12 months as well as our longer-term liquidity needs.
See Note 3, Business Combinations to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K for a discussion of our acquisitions. Investing in growth and scaling our business.
Refer to Note 3, “ Acquisitions” to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K for a discussion of our acquisitions. Investing in growth and scaling our business.
We also collaborate with numerous accounting firms who have built implementation practices around our software to serve their customer base. 29 Table of Contents We believe that global commerce and the compliance environment provides durable and accelerating growth opportunities for our business. We generated revenues of $572.4 million and $491.6 million in 2023 and 2022, respectively.
We also collaborate with numerous accounting firms who have built implementation practices around our software to serve their customer base. 30 Table of Contents We believe that global commerce and the compliance environment provides durable and accelerating growth opportunities for our business. We generated revenues of $666.8 million and $572.4 million in 2024 and 2023, respectively.
Adjusted EBITDA was $100.8 million and $78.7 million in 2023 and 2022, respectively. Adjusted EBITDA is a non-GAAP financial measure. Refer to “Key Business Metrics” and “Use and Reconciliation of Non-GAAP Financial Measures” for further discussion of key business metrics and non-GAAP financial measures and their comparison to GAAP financial measures.
Adjusted EBITDA was $151.9 million and $100.8 million in 2024 and 2023, respectively. Adjusted EBITDA is a non-GAAP financial measure. Refer to “Key Business Metrics” and “Use and Reconciliation of Non-GAAP Financial Measures” for further discussion of key business metrics and non-GAAP financial measures and their comparison to GAAP financial measures.
We generated 45% and 41% of software subscription revenues from cloud-based subscriptions in 2023 and 2022, respectively. While our on-premise software subscription revenues comprised 55% and 59% of our software subscription revenues for 2023 and 2022, respectively, they continue to decrease as a percentage of total software subscriptions revenues as cloud-based subscriptions grow.
We generated 49% and 45% of software subscription revenues from cloud-based subscriptions in 2024 and 2023, respectively. While our on-premise software subscription revenues comprised 51% and 55% of our software subscription revenues for 2024 and 2023, respectively, they continue to decrease as a percentage of total software subscriptions revenues as cloud-based subscriptions grow.
These amounts will fluctuate as a result of ongoing merger and acquisition activities and for changes in foreign currency rates. Interest (Income) Expense, net Interest (income) expense, net reflects the net amount of interest expense and interest income over the same period. Interest expense consists primarily of interest incurred related to borrowings, bank credit facility and leases.
These amounts will fluctuate as a result of ongoing merger and acquisition activities and for changes in foreign currency rates. Interest Expense (Income), net Interest expense (income), net reflects the net amount of interest expense and interest income over the same period. Interest expense consists primarily of interest incurred related to the Notes, Term Loan, Credit Agreement, and leases.
Over the past three years, cloud sales to new customers have grown at a faster rate than sales of on-premise solutions, which is a trend that we expect to continue over time. We generated 45% and 41% of software subscription revenues from cloud-based subscriptions in 2023 and 2022, respectively. We host our cloud-based subscriptions.
Over recent years, cloud sales to new customers have grown at a faster rate than sales of on-premise solutions, which is a trend that we expect to continue over time. We generated 49% and 45% of software subscription revenues from cloud-based subscriptions in 2024 and 2023, respectively. We host our cloud-based subscriptions.
We define Adjusted EBITDA as net income or loss before interest (including adjustments to the settlement value of deferred purchase commitment liabilities), taxes, depreciation, and amortization, as adjusted to exclude charges for asset impairments, stock-based compensation expense, amortization of cloud computing arrangement implementation costs, severance expense, acquisition contingent consideration, changes in the settlement value of deferred purchase commitment liabilities recorded as interest expense, litigation settlements, and transaction costs.
We define Adjusted EBITDA as net income or loss before interest (including adjustments to the settlement value of deferred purchase commitment liabilities), income tax expense or benefit, depreciation, and amortization, as adjusted to exclude charges for stock-based compensation expense, amortization of cloud computing arrangement implementation costs, severance expense, acquisition contingent consideration, changes in the fair value of acquisition contingent earn-outs, changes in the settlement value of deferred purchase commitment liabilities recorded as interest expense, and transaction costs.
There were no outstanding borrowings under the Line of Credit at December 31, 2023. Outstanding borrowings under the credit agreement are collateralized by nearly all of the assets of the Company and contain financial and operating covenants. The Company was in compliance with these covenants at December 31, 2023.
Outstanding borrowings under the Credit Agreement are collateralized by nearly all of the assets of the Company and contain financial and operating covenants. The Company was in compliance with these covenants at December 31, 2024.
Adjusted EBITDA margin represents Adjusted EBITDA divided by total revenues for the same period. For purposes of comparison, our net loss was ($13.1) million and ($12.3) million in 2023 and 2022, respectively, while our net loss margin was (2.3)% and (2.5)% over the same periods, respectively.
Adjusted EBITDA margin represents Adjusted EBITDA divided by total revenues for the same period. For purposes of comparison, our net loss was $(52.7) million and $(13.1) million in 2024 and 2023, respectively, while our net loss margin was (7.9)% and (2.3)% over the same periods, respectively.
In addition, this included an increase in depreciation and amortization of capitalized software and acquired intangible assets of $9.1 million associated with our ongoing investments in internal-use software for cloud-based subscription solutions, software developed for sale for new products and enhancements to existing products, and costs associated with the amortization of acquired intangible assets.
In addition, we experienced an increase in depreciation and amortization of capitalized software and acquired intangible assets of $5.3 million associated with our ongoing investments in internal-use software for cloud-based subscription solutions, software developed for sale for new products and enhancements to existing products, and costs associated with the amortization of acquired intangible assets.
This increase was primarily due to a $12.1 million increase in personnel costs related to development work associated with new solutions to address end-to-end data analysis and compliance needs of our customers, and continued expansion of connectors and application program interfaces (“APIs”) to customer ERP and other software platforms.
This increase was primarily due to a $4.9 million increase in personnel costs related to development work associated with new solutions to address end-to-end data analysis and compliance needs of our customers, and continued expansion of connectors and application program interfaces (“APIs”) to customer enterprise resource planning (“ERP”) and other software platforms.
This seasonality is reflected in our revenues, though the impact to overall annual or quarterly revenues is typically minimal since we recognize subscription revenue ratably over the term of the customer contract.
This seasonality is reflected in our revenues, though the impact to overall annual or quarterly revenues is typically minimal since we recognize subscription revenue ratably over the term of the customer contract. Additionally, this seasonality is reflected in commission expenses to our sales personnel and our partners.
The effect of a change in tax laws or rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. The effects of future changes in tax laws or rates are not anticipated.
The effect of a change in tax laws or rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.
Free cash flow margin increased in 2023 by 400 basis points compared to 2022. Use and Reconciliation of Non-GAAP Financial Measures In addition to our results determined in accordance with GAAP, we have calculated Adjusted EBITDA, Adjusted EBITDA margin, free cash flow, free cash flow margin, non-GAAP cost of revenues, non-GAAP gross profit, non-GAAP gross margin, non-GAAP research and development expense, non-GAAP selling and marketing expense, non-GAAP general and administrative expense, non-GAAP operating income, and non-GAAP net income, which are each non-GAAP financial measures.
Free cash flow margin increased in 2024 to 11.7% compared to 1.1% in 2023. Use and Reconciliation of Non-GAAP Financial Measures In addition to our results determined in accordance with GAAP, we have calculated Adjusted EBITDA, Adjusted EBITDA margin, free cash flow, free cash flow margin, non-GAAP cost of revenues, non-GAAP gross profit, non-GAAP gross margin, non-GAAP research and development expense, non-GAAP selling and marketing expense, non-GAAP general and administrative expense, non-GAAP operating income, and non-GAAP net income, which are each non-GAAP 48 Table of Contents financial measures.
Specific risks for these critical accounting estimates are described in the following sections. For all of these estimates, we caution that future events rarely develop exactly as forecast, and such estimates routinely require adjustment.
Specific risks for these critical accounting estimates are described in the following sections. For all of these estimates, we caution that future events rarely develop exactly as forecast, and such estimates routinely require adjustment. We have reviewed these critical accounting estimates and related disclosures with our Audit Committee.
Quantitative and Qualitative Disclosures about Market Risk Interest Rate Risk We had unrestricted cash and cash equivalents of $68.2 million and $91.8 million as of December 31, 2023 and 2022, respectively, and investments of $9.5 million and $11.2 million as of December 31, 2023 and 2022, respectively.
Quantitative and Qualitative Disclosures about Market Risk Interest Rate Risk We had unrestricted cash and cash equivalents of $296.1 million and $68.2 million as of December 31, 2024 and 2023, respectively, and investments of $9.2 million and $9.5 million as of December 31, 2024 and 2023, respectively.
AARPC represents average annual revenue per customer and is calculated by dividing ARR by the number of software subscription customers at the end of the respective period: For the year ended December 31, (Dollars in millions) 2023 2022 Year-Over-Year Change Annual Recurring Revenue $ 512.5 $ 431.1 $ 81.4 18.9 % ARR increased by $81.4 million or 18.9% in 2023 as compared to 2022.
AARPC represents average annual revenue per customer and is calculated by dividing ARR by the number of software subscription customers at the end of the respective period: For the year ended December 31, (Dollars in millions) 2024 2023 Year-Over-Year Change Annual Recurring Revenue $ 603.1 $ 512.5 $ 90.6 17.7 % ARR increased by $90.6 million, or 17.7%, at December 31, 2024, as compared to December 31, 2023.
We define Adjusted EBITDA as net income or loss before interest (including adjustments to the settlement value of deferred purchase commitment liabilities), taxes, depreciation, and amortization, as adjusted to exclude charges for asset impairments, stock-based compensation expense, amortization of cloud computing arrangement implementation costs, severance expense, acquisition contingent consideration, litigation settlements, and transaction costs.
We define Adjusted EBITDA as net income or loss before interest (including adjustments to the settlement value of deferred purchase commitment liabilities), income tax expense or benefit, depreciation, and amortization, as adjusted to exclude charges for stock-based compensation expense, amortization of cloud computing arrangement implementation costs, severance expense, acquisition contingent consideration, changes in the fair value of acquisition contingent earn-outs, and transaction costs.
We define free cash flow margin as free cash flow divided by total revenues for the same period. 44 Table of Contents Our net cash provided by operating activities was $74.3 million and $63.8 million in 2023 and 2022, respectively, while our operating cash flow margin was 13.0% and 13.0% over the same periods, respectively.
We define free cash flow margin as free cash flow divided by total revenues for the same period. Our net cash provided by operating activities was $164.8 million and $74.3 million in 2024 and 2023, respectively, while our operating cash flow margin was 24.7% and 13.0% over the same periods, respectively.
Refer to “Management’s Discussion and Analysis of Financial Condition and Results of Operations– Key Business Metrics– Net Revenue Retention Rate and Gross Revenue Retention Rate” and for further discussion. Acquire new customers.
Our GRR was 95% in both 2024 and 2023. Refer to “Management’s Discussion and Analysis of Financial Condition and Results of Operations– Key Business Metrics– Net Revenue Retention Rate and Gross Revenue Retention Rate” and for further discussion. Acquire new customers.
More information is provided in Note 3 to our consolidated financial statements, beginning on page F-1 of this Annual Report on Form 10-K. Components of Our Results of Operations Revenues We generate revenues from software subscriptions and services.
For further information, refer to Note 3, “Acquisitions” to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K. 33 Table of Contents Components of Our Results of Operations Revenues We generate revenues from software subscriptions and services.
We had a net loss of ($13.1) million and ($12.3) million in 2023 and 2022, respectively. These amounts are presented in accordance with generally accepted accounting principles in the U.S. (“GAAP”).
We had net losses of $(52.7) million and $(13.1) million in 2024 and 2023, respectively. These amounts are presented in accordance with generally accepted accounting principles in the U.S. (“GAAP”).
This increase also reflects investments in employees, systems, and other resources in support of our growth, and public company reporting and compliance activities. Additionally, there was an increase of $2.6 million for the amortization of capitalized cloud computing implementation costs related to our ERP modernization initiative.
This increase also reflects investments in employees, systems, and other resources in support of our growth. Additionally, there was an increase of $1.4 million for the amortization of capitalized cloud computing implementation costs related to our ERP modernization initiative which was completed in 2023.
We have reviewed these critical accounting estimates and related disclosures with our Audit Committee. 48 Table of Contents Our discussion of critical accounting estimates is intended to supplement, not duplicate, our summary of significant accounting policies so that readers will have greater insight into the uncertainties involved in applying our critical accounting policies and estimates.
Our discussion of critical accounting estimates is intended to supplement, not duplicate, our summary of significant accounting policies so that readers will have greater insight into the uncertainties involved in applying our critical accounting policies and estimates.
Selling and Marketing For the year ended December 31, (Dollars in thousands) 2023 2022 Year-Over-Year Change Selling and marketing $ 140,237 $ 125,335 $ 14,902 11.9 % Selling and marketing expenses increased $14.9 million, or 11.9%, to $140.2 million in 2023 compared to $125.3 million in 2022, primarily driven by a $13.5 million increase in payroll and related expenses associated with the growth in period-over-period subscription sales and services revenues and expansion of our partner and channel management programs.
Selling and Marketing For the year ended December 31, (Dollars in thousands) 2024 2023 Year-Over-Year Change Selling and marketing $ 170,574 $ 140,237 $ 30,337 21.6 % 40 Table of Contents Selling and marketing expenses increased $30.3 million, or 21.6%, to $170.6 million in 2024 compared to $140.2 million in 2023, primarily driven by a $15.6 million increase in payroll and related expenses associated with the growth in period-over-period subscription sales and services revenues and expansion of our partner and channel management programs.
The increase in software subscriptions revenues of $65.4 million, or 15.7%, was primarily driven by an increase of $35.5 million, primarily from cross selling new products to existing customers, and to a lesser extent, increases from expanded use of our products and services, and price increases.
The increase in software subscriptions revenues of $86.3 million, or 17.9%, was primarily driven by an increase of $80.5 million from cross selling new products to existing customers, increases from expanded use of our products and services, and price increases.
We record uncertain tax positions in accordance with ASC 740, Income Taxes , on the basis of a two-step process requiring judgement whereby: (i) we determine whether it is more likely than not that the tax positions will be sustained based on the technical merits of the position, and (ii) for those tax positions that meet the more likely than not recognition threshold, we recognize the largest amount of tax benefit that is greater than 50 percent likely to be realized upon ultimate settlement with the related tax authority.
In evaluating the ability to realize our deferred tax assets, we rely on, in order of increasing subjectivity, taxable income in prior carryback years, the future reversals of existing taxable temporary differences, tax planning strategies and forecasted taxable income using historical and projected future operating results. We record uncertain tax positions in accordance with ASC 740, Income Taxes , on the basis of a two-step process requiring judgement whereby: (i) we determine whether it is more likely than not that the tax positions will be sustained based on the technical merits of the position, and (ii) for those tax positions that meet the more likely than not recognition threshold, we recognize the largest amount of tax benefit that is greater than 50 percent likely to be realized upon ultimate settlement with the related tax authority.
The increase was primarily due to the impact of infrastructure and technology purchases and other capitalized infrastructure costs to support our growth, which were placed in service during 2023 and 2022.
The increase was primarily due to the impact of infrastructure and technology purchases and other capitalized infrastructure costs to support our growth.
Revenue is recognized upon transfer of control of promised goods or services to customers in an amount that reflects the consideration expected to be received in exchange for those products or services. Our most critical judgments required in applying ASC 606 relate to the identification of performance obligations.
Revenue is recognized upon transfer of control of promised goods or services to customers in an amount that reflects the consideration expected to be received in exchange for those products or services.
Selling and Marketing Expenses Selling expenses consist primarily of personnel and related expenses in support of sales and marketing efforts. These costs include salaries, benefits, bonuses, and stock-based compensation. In addition, selling expense includes costs related to advertising and promotion efforts, branding costs, partner-based commissions, costs associated with our annual customer conferences and amortization of certain acquired intangible assets.
In addition, selling and marketing expenses include costs related to advertising and promotion efforts, branding costs, partner-based commissions, costs associated with our annual customer conferences and amortization of certain acquired intangible assets.
Additionally, this seasonality is reflected in commission expenses to our sales personnel and our partners. 39 Table of Contents Our quarterly revenues have generally increased over the last two years primarily due to new sales to existing customers and sales to new customers. However, the pace of our revenue growth has not been consistent.
Our quarterly revenues have generally increased over the last two years primarily due to new sales to existing customers and sales to new customers. However, the pace of our revenue growth has not been consistent.
All services within the cloud-based contracts consistently provide a benefit to the customer during the subscription period, thus the associated revenue is recognized ratably over the subscription period.
Revenue recognition begins on the later of the beginning of the subscription period or the date the customer is provided access to the cloud-based solutions. All services within the cloud-based contracts consistently provide a benefit to the customer during the subscription period; thus, the associated revenue is recognized ratably over the subscription period.
Our NRR was 113% and 110% in 2023 and 2022, respectively. We believe our gross revenue retention rate (“GRR”) provides insight into and demonstrates to investors our ability to retain revenues from our existing customers. Our GRR was 95% and 96% in 2023 and 2022, respectively.
We monitor our net revenue retention rate (“NRR”) in order to understand our ability to retain and grow revenues from our customers. Our NRR was 109% and 113% in 2024 and 2023, respectively. We believe our gross revenue retention rate (“GRR”) provides insight into and demonstrates to investors our ability to retain revenues from our existing customers.
Cost of Software Subscriptions Revenues For the year ended December 31, (Dollars in thousands) 2023 2022 Year-Over-Year Change Cost of software subscriptions revenues $ 162,920 $ 142,071 $ 20,849 14.7 % Cost of software subscriptions revenues increased $20.8 million, or 14.7%, to $162.9 million in 2023 compared to $142.1 million in 2022.
Cost of Software Subscriptions Revenues For the year ended December 31, (Dollars in thousands) 2024 2023 Year-Over-Year Change Cost of software subscriptions revenues $ 175,580 $ 162,920 $ 12,660 7.8 % Cost of software subscriptions revenues increased $12.7 million, or 7.8%, to $175.6 million in 2024 compared to $162.9 million in 2023.
We are required to pay a quarterly fee on the difference between the $200.0 million allowed maximum borrowings and the unpaid principal balance outstanding under the line at the applicable rate. At December 31, 2023, the base rate option and the SOFR Option applicable to the Line of Credit were 8.50% and 6.48%, respectively.
We are required to pay a quarterly fee on the difference between the $300.0 million allowed maximum borrowings and the unpaid principal balance outstanding under the Line of Credit at the applicable rate.
We plan to continue to significantly expand our infrastructure and personnel to support our future growth and increases in transaction volumes of our cloud-based solutions, including through acquisitions.
We plan to continue to significantly expand our infrastructure and personnel to support our future growth and increases in transaction volumes of our cloud-based solutions, including through acquisitions. We expect growth in our business will result in an increase in cost of software subscriptions revenue in absolute dollars.
Software subscriptions revenues derived from new customers averaged 6.2% and 8.0% of total software subscriptions revenues in 2023 and 2022, respectively. 36 Table of Contents The $15.4 million increase in services revenues was primarily driven by an increase of $11.3 million in software subscription-related services associated with the growth in subscription revenues, which includes new customers implementing our solutions and upgrading existing customers to newer versions of our solutions.
The $8.1 million increase in services revenues was primarily driven by an increase of $2.7 million in software subscription-related services associated with the growth in subscription revenues, which includes new customers 39 Table of Contents implementing our solutions and upgrading existing customers to newer versions of our solutions.
Liquidity and Capital Resources As of December 31, 2023, we had unrestricted cash and cash equivalents of $68.2 million and an accumulated deficit o f $0.6 million. In addition, we had $9.5 million in investment securities with a maturity date exceeding three months as of Decembe r 31, 2023 which are not included in unrestricted cash and cash equivalents.
Liquidity and Capital Resources As of December 31, 2024, we had unrestricted cash and cash equivalents of $296.1 million, in addition to $9.2 million in investment securities with a maturity date exceeding three months , which are not included in unrestricted cash and cash equivalents.
Our NRR calculation takes into account any revenue lost from departing customers or customers who have downgraded or reduced 42 Table of Contents usage, as well as any revenue expansion from migrations, new licenses for additional products or contractual and usage-based price changes. For the year ended December 31, 2023 2022 Net Revenue Retention Rate 113 % 110 % The 300 basis point increase in NRR to 113% at December 31, 2023 from 110% for the same period in 2022 was primarily attributable to an increase in customer cross-sell and additional entitlements.
Our NRR calculation takes into account any revenue lost from departing customers or customers who have downgraded or reduced usage, as well as any revenue expansion from migrations, new licenses for additional products or contractual and usage-based price changes. As of December 31, 2024 2023 Net Revenue Retention Rate 109 % 113 % The 400 basis point decrease in NRR to 109% at December 31, 2024 from 113% for the same period in 2023 was primarily attributed to a decrease in customer cross-sell and additional entitlements. 46 Table of Contents Gross Revenue Retention Rate (“GRR”). We believe our GRR provides insight into and demonstrates to investors our ability to retain revenues from our existing customers.
In foreign jurisdictions, our subsidiaries are generally taxed at the corporate level, and the income tax provision or benefit is based on income or loss sourced to these foreign jurisdictions at the tax rates applicable in those jurisdictions.
Significant judgment is required in determining our worldwide income tax provision. Vertex and its subsidiaries are generally taxed at the corporate level, and the income tax provision or benefit is based on income or loss sourced to the U.S. federal and state jurisdictions as well as foreign jurisdictions at the tax rates applicable in those jurisdictions.
We had 4,289 customers and approximately $100,500 of AARPC at December 31, 2022. The increase in customers and AARPC was due to expansion of usage by existing customers and adding new customers through organic growth.
At December 31, 2024, we had 4,915 direct customers and approximately $122,706 of AARPC. At December 31, 2023, we had 4,310 direct customers and approximately $118,910 of AARPC. The increase in AARPC was primarily due to expansion of usage by existing customers and adding new customers through organic growth.
MRR is calculated by dividing the software subscription price, inclusive of discounts, by the number of subscription covered months. MRR only includes customers with MRR at the end of the last month of the measurement period.
ARR is based on monthly recurring revenue (“MRR”) from software subscriptions for the most recent month at period end, multiplied by twelve. MRR is calculated by dividing the software subscription price, inclusive of discounts, by the number of subscription covered months. MRR only includes customers with MRR at the end of the last month of the measurement period.
A valuation allowance is recorded when management determines it is more likely than not that some or all of the deferred tax assets will not be realized.
The effects of future changes in tax laws or rates are not anticipated. A valuation allowance is recorded when management determines it is more likely than not that some or all the deferred tax assets will not be realized. Significant judgment is required in determining any valuation allowance recorded against deferred tax assets.
By forming additional strategic alliances with participants in the global digital transformation, such as payments and eCommerce platforms, we can continue to expand our exposure to all transactions, both business-to-consumer and business-to-business. Future partnerships with large-scale digital payments companies will allow us to develop additional customer-centric solutions and further expand our customer base. Continued innovation of our software.
By forming additional strategic alliances with participants in the global digital transformation, such as payments and eCommerce platforms, we can continue to expand our exposure to all transactions, business-to-consumer, business-to-business, and business-to-government. 31 Table of Contents Continued innovation of our software.
The following schedules reconcile Adjusted EBITDA and Adjusted EBITDA margin to net loss, the most closely directly comparable GAAP financial measure. 43 Table of Contents For the year ended December 31, (Dollars in thousands) 2023 2022 Adjusted EBITDA: Net loss $ (13,093) $ (12,304) Interest expense, net (1) 4,164 2,048 Income tax expense (benefit) (8,581) 2,174 Depreciation and amortization – property and equipment 15,202 12,440 Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues 54,048 44,934 Amortization of acquired intangible assets – selling and marketing expense 2,641 3,779 Amortization of cloud computing implementation costs – general and administrative 2,570 — Stock-based compensation expense 33,919 19,729 Severance expense 3,576 877 Acquisition contingent consideration 1,549 2,300 Litigation settlements — 2,000 Transaction costs (2) 4,853 696 Adjusted EBITDA $ 100,848 $ 78,673 Adjusted EBITDA Margin: Total revenues $ 572,387 $ 491,624 Adjusted EBITDA margin 17.6 % 16.0 % (1) The year ended December 31, 2023 includes $4,020 for the change in the settlement value of a deferred purchase commitment liability recorded as interest expense. (2) The year ended December 31, 2023 includes costs associated with a public tender offer, which was withdrawn by the Company on January 14, 2024.
The following schedules reconcile Adjusted EBITDA and Adjusted EBITDA margin to net loss, the most closely directly comparable GAAP financial measure. For the year ended December 31, (Dollars in thousands) 2024 2023 Adjusted EBITDA: Net loss $ (52,729) $ (13,093) Interest expense (income), net (1) (4,137) 4,164 Income tax expense (benefit) 54,638 (8,581) Depreciation and amortization – property and equipment 20,953 15,202 Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues 59,302 54,048 Amortization of acquired intangible assets – selling and marketing expense 2,478 2,641 Amortization of cloud computing implementation costs – general and administrative 4,007 2,570 Stock-based compensation expense 47,425 33,919 Severance expense 3,048 3,576 Acquisition contingent consideration (2,575) 1,549 Change in fair value of acquisition contingent earn-outs 17,500 — Transaction costs (2) 2,032 4,853 Adjusted EBITDA $ 151,942 $ 100,848 Adjusted EBITDA Margin: Total revenues $ 666,776 $ 572,387 Adjusted EBITDA margin 22.8 % 17.6 % (1) The years ended December 31, 2024 and 2023 include $423 and $4,020, respectively, for the change in the settlement value of a deferred purchase commitment liability recorded as interest expense. (2) The year ended December 31, 2023 includes costs associated with a public tender offer, which was withdrawn by the Company in January 2024. 47 Table of Contents The increase in Adjusted EBITDA of $51.1 million in 2024, as compared to 2023, was primarily driven by an increase of $85.2 million in non-GAAP gross profit, which was partially offset by a $25.7 million increase in non-GAAP selling and marketing expense, a $4.2 million increase in non-GAAP research and development expense, and a $3.3 million increase in non-GAAP general and administrative expense.
Variations in the actual outcome of these future tax consequences could materially impact the consolidated financial statements. Recent Accounting Pronouncements A discussion of recent accounting pronouncements is included in Note 1 to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K. 49 Table of Contents Item 7A.
Recent Accounting Pronouncements A discussion of recent accounting pronouncements is included in Note 1,“Summary of Significant Accounting Policies” to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K. Item 7A.
After excluding stock-based compensation expense, as a percentage of total revenues, selling and marketing expenses decreased to 23.0% in 2023 compared to 24.2% in 2022. General and Administrative For the year ended December 31, (Dollars in thousands) 2023 2022 Year-Over-Year Change General and administrative $ 145,936 $ 121,651 $ 24,285 20.0 % General and administrative expenses increased $24.3 million, or 20.0%, to $145.9 million in 2023 compared to $121.7 million in 2022, primarily driven by an increase of $15.0 million associated with planned strategic investments in information technology infrastructure, business process re-engineering, and other initiatives to drive future operating leverage.
General and Administrative For the year ended December 31, (Dollars in thousands) 2024 2023 Year-Over-Year Change General and administrative $ 152,835 $ 145,936 $ 6,899 4.7 % General and administrative expenses increased $6.9 million, or 4.7%, to $152.8 million in 2024 compared to $145.9 million in 2023, primarily driven by an increase of $2.8 million associated with planned strategic investments in information technology infrastructure, business process re-engineering, and other initiatives to drive future operating leverage.
However, we may pursue acquisitions, development arrangements with partners or similar activities to accelerate these investments. We believe continuing to enhance our existing software and expanding our tax content will increase our ability to generate revenues by broadening the appeal of our software to new customers as well as increasing our engagement with existing customers.
We believe continuing to enhance our existing software and expanding our tax content and increasing jurisdictional coverage with our e-invoicing solutions will increase our ability to generate revenues by broadening the appeal of our software to new customers as well as increasing our engagement with existing customers.
Software subscriptions include the related software, consisting of both on-premise and cloud-based software, tax content updates, and product support. The updates and support, which are part of the subscription agreement, are essential to the continued utility of the software. Therefore, we have determined that the software, updates, and support should be combined into a single performance obligation.
The updates and support, which are part of the subscription agreement, are essential to the continued utility of the software. Therefore, we have determined that the software, updates, and support should be combined into a single performance obligation. Income Taxes We estimate our income taxes based on the various jurisdictions where we conduct business.
In addition, interest expense will include adjustments to the fair value of contracts that may be entered into to hedge risks associated with currency fluctuations for cash receipts or cash payments denominated in currencies other than U.S. dollars and which do not qualify for hedge accounting.
In addition, interest expense will include adjustments to the fair value of contracts that may be entered into to hedge risks associated with currency fluctuations for cash receipts or cash payments denominated in currencies other than U.S. dollars and which do not qualify for hedge accounting, as well as changes in the settlement value of the future payment obligation for the Systax acquisition, which was fully settled on June 5, 2024. 36 Table of Contents Interest income reflects earnings on investments of our cash on hand and our investment securities.
The decrease in tax expense was primarily driven by changes in tax benefits on exercises and vestings of stock awards, tax credits, valuation allowances on net deferred tax assets established for certain foreign jurisdictions, loss before income taxes, and limitations on deductions of certain employees’ compensation under Internal Revenue Code Section 162(m).
This change was primarily driven by changes in valuation allowances on net deferred tax assets established for U.S. and certain foreign jurisdictions, nondeductible purchase commitment and contingent consideration liabilities, and pre-tax income, partially offset by the favorable impact of tax benefits on exercises and vesting of stock awards, net of limitations on deductions of certain employees’ compensation under Internal Revenue Code (“IRC”) Section 162(m).
We assess our income tax positions and record tax benefits or expense based upon our evaluation of the facts, circumstances, and information available at the reporting date.
We record interest related to underpayment of income taxes as interest expense and penalties as other operating expenses in the consolidated statements of comprehensive loss. We assess our income tax positions and record tax benefits or expense based upon our evaluation of the facts, circumstances, and information available at the reporting date.
See Note 3 to our consolidated financial statements beginning on page F-1 of this Annual Report on Form 10-K. Key Business Metrics We regularly review the metrics identified below to evaluate growth trends, measure our performance, formulate financial projections and make strategic decisions. Annual Recurring Revenue (“ARR”) and Average Annual Revenue Per Customer (“AARPC”).
Key Business Metrics We regularly review the metrics identified below to evaluate growth trends, measure our performance, formulate financial projections and make strategic decisions. Annual Recurring Revenue (“ARR”) and Average Annual Revenue Per Customer (“AARPC”). We derive the vast majority of our revenue from recurring software subscriptions.
Our NRR refers to the ARR expansion during the 12 months of a reporting period for all customers who were part of our customer base at the beginning of the reporting period.
We also believe it demonstrates to investors our ability to expand existing customer revenues, which is one of our key growth strategies. Our NRR refers to the ARR expansion during the 12 months of a reporting period for all customers who were part of our customer base at the beginning of the reporting period.