Changes in operating assets and liabilities provided $106.1 million in operating cash flows and were primarily driven by by increased advanced billings of $118.1 million and increased accrued expenses of $52.5 million, offset by increased accounts receivable and unbilled, net of $66.9 million..
Changes in operating assets and liabilities provided $106.1 million in operating cash flows and were primarily driven by increased advanced billings of $118.1 million and increased accrued expenses of $52.5 million, offset by increased accounts receivable and unbilled, net of $66.9 million.
Repurchases under the share repurchase programs are executed in the open market or negotiated transactions under trading plans established pursuant to Rule 10b5-1. The Company constructively retired the repurchased shares associated with these approved share repurchase programs, except for a small portion which were retained as Treasury Shares on the consolidated statements of shareholders' equity.
Repurchases under the share repurchase programs are executed in the open market or negotiated transactions under trading plans established pursuant to Rule 10b5-1. The Company constructively retires the repurchased shares associated with these approved share repurchase programs, except for a small portion which were retained as Treasury Shares on the consolidated statements of shareholders' equity.
Our principal sources of liquidity are operating cash flows and from borrowings under our unsecured credit facility consisting of up to a $250.0 million revolving line of credit which we entered into on September 30, 2019 (the “Credit Facility”), and has subsequently been amended.
Our principal sources of liquidity are operating cash flows and from borrowings under our unsecured credit facility consisting of up to a $150.0 million revolving line of credit which we entered into on September 30, 2019 (the “Credit Facility”), and has subsequently been amended.
The following table summarizes the key weighted average assumptions used in the Black-Scholes-Merton option pricing model to calculate the fair value of options during the periods: Year Ended December 31, 2022 2021 2020 Expected holding period - years 4.7 5.0 3.1 Expected volatility 36.5% 34.3% 31.0% Risk-free interest rate 1.9% 0.9% 1.0% Expected dividend yield 0.0% 0.0% 0.0% The assumptions used in the table above reflect both grant date inputs to arrive at the grant date fair values for stock options subject to equity-classified stock compensation accounting and reflect a fair value calculation for stock options outstanding in the period subject to liability-classified stock compensation accounting.
The following table summarizes the key weighted average assumptions used in the Black-Scholes-Merton option pricing model to calculate the fair value of options during the periods: Year Ended December 31, 2023 2022 2021 Expected holding period - years 4.1 4.7 5.0 Expected volatility 45.4% 36.5% 34.3% Risk-free interest rate 3.8% 1.9% 0.9% Expected dividend yield 0.0% 0.0% 0.0% The assumptions used in the table above reflect both grant date inputs to arrive at the grant date fair values for stock options subject to equity-classified stock compensation accounting and reflect a fair value calculation for stock options outstanding in the period subject to liability-classified stock compensation accounting.
Due to the lack of Company specific historical and implied volatility data, our estimate of expected volatility is based upon a blended approach that utilizes the historical volatility of the Company's common stock for periods in which the Company has sufficient information and the historical volatility of a group of peer companies that are most representative of our company.
Due to the lack of Company specific historical and implied volatility data, our estimate of expected volatility is based upon a blended approach that utilizes the historical volatility of the Company's common stock for periods in which the Company has - 40 - Table of Contents sufficient information and the historical volatility of a group of peer companies that are most representative of our company.
We believe that we are a partner of choice for small- and mid-sized biopharmaceutical - 30 - Table of Contents companies based on our ability to consistently utilize our full-service, disciplined operating model to deliver timely and high-quality results for our customers.
We believe that we are a partner of choice for small- and mid-sized biopharmaceutical companies based on our ability to consistently utilize our full-service, disciplined operating model to deliver timely and high-quality results for our customers.
Similar to new business awards, the number and amount of cancellations can vary significantly period over period due to timing of customer correspondence and study-specific circumstances. Net new business awards represent gross new business awards received in a period offset by total cancellations in that period.
Similar to new business awards, - 33 - Table of Contents the number and amount of cancellations can vary significantly period over period due to timing of customer correspondence and study-specific circumstances. Net new business awards represent gross new business awards received in a period offset by total cancellations in that period.
Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021, filed with the SEC on February 15, 2022. This item and the related discussion contain forward-looking statements reflecting current expectations that involve risks and uncertainties.
Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed with the SEC on February 14, 2023. This item and the related discussion contain forward-looking statements reflecting current expectations that involve risks and uncertainties.
Our global platform includes approximately 5,200 employees across 40 countries, providing our customers with broad access to diverse markets and patient populations as well as local regulatory expertise and market knowledge. How We Generate Revenue We earn fees through the performance of services detailed in our customer contracts.
Our global platform includes approximately 5,900 employees across 42 countries, providing our customers with broad access to diverse markets and patient populations as well as local regulatory expertise and market knowledge. How We Generate Revenue We earn fees through the performance of services detailed in our customer contracts.
We have translated the Euro into U.S. dollars using the following average exchange rates based on data obtained from www.xe.com: Year Ended December 31, 2022 2021 U.S. Dollars per Euro: 1.05 1.18 Results of Operations This section generally discusses 2022 and 2021 items and year-to-year comparisons between 2022 and 2021.
We have translated the Euro into U.S. dollars using the following average exchange rates based on data obtained from www.xe.com: Year Ended December 31, 2023 2022 U.S. Dollars per Euro: 1.08 1.05 Results of Operations This section generally discusses 2023 and 2022 items and year-to-year comparisons between 2023 and 2022.
The increase was mainly attributable to third-party investment gains and foreign exchange gains or losses that arise in connection with the revaluation of short-term inter-company balances between our domestic and international subsidiaries, gains or losses from foreign currency transactions, such as those resulting from the settlement of third-party accounts receivables and payables denominated in a currency other than the local currency of the entity making the payment.
The change was mainly attributable to foreign exchange gains or losses that arise in connection with the revaluation of short-term inter-company balances between our domestic and international subsidiaries, gains or losses from foreign currency transactions, such as - 35 - Table of Contents those resulting from the settlement of third-party accounts receivables and payables denominated in a currency other than the local currency of the entity making the payment and third-party investment gains or losses.
Cash Flow from Investing Activities Net cash used in investing activities was $38.7 million for the year ended December 31, 2022, primarily consisting of property and equipment expenditures.
Cash Flow from Investing Activities Net cash used in investing activities was $34.6 million for the year ended December 31, 2023, primarily consisting of property and equipment expenditures. Net cash used in investing activities was $38.7 million for the year ended December 31, 2022, primarily consisting of property and equipment expenditures.
This section of this Form 10-K generally discusses 2022 and 2021 items and year-to-year comparisons between 2022 and 2021. For a comparison of our results of operations for the fiscal years ended December 31, 2021 and December 31, 2020, see “Part II, Item 7.
This section of this Form 10-K - 31 - Table of Contents generally discusses 2023 and 2022 items and year-to-year comparisons between 2023 and 2022. For a comparison of our results of operations for the fiscal years ended December 31, 2022 and December 31, 2021, see “Part II, Item 7.
We have recognized certain liabilities, including penalties and interest in the amount of $3.8 million as of December 31, 2022, within other long-term liabilities on the consolidated balance sheets. These relate to uncertain tax positions that are subject to various assumptions and judgment. Liabilities for these uncertain tax positions are assessed on a position by position basis.
We have recognized certain liabilities, including penalties and interest in the amount of $5.2 million as of December 31, 2023, within other long-term liabilities on the consolidated balance sheets. These relate to uncertain tax positions that are subject to various assumptions and judgment. Liabilities for these uncertain tax positions are assessed on a position by position basis.
The increase was primarily attributed to higher reimbursed out-of-pocket expenses and higher personnel costs to support the growth in service activities. Reimbursed out-of-pocket expenses, which can fluctuate significantly from period to period based on the timing of program initiation and closeout, increased $119.5 million for the year ended December 31, 2022, compared to the same period in the prior year.
The increase was primarily attributed to higher reimbursed out-of-pocket expenses and higher personnel costs to support the growth in service activities. Reimbursed out-of-pocket expenses, which can fluctuate significantly from period to period based on the timing of program initiation and closeout, increased $230.4 million for the year ended December 31, 2023, compared to the same period in the prior year.
The Company was in compliance with all financial covenants as of December 31, 2022.
The Company was in compliance with all financial covenants as of December 31, 2023.
As of December 31, 2022, cash commitments to support operating business needs include lease liabilities discussed in Note 8 of the Consolidated Financial Statements, short-term debt discussed in Note 7 of the Consolidated Financial Statements, purchase commitments discussed in Note 12 of the Consolidated Financial Statements and capital expenditures primarily related to infrastructure investments in our facilities, equipment and technology.
As of December 31, 2023, cash commitments to support operating business needs include lease liabilities discussed in Note 8 of the Consolidated Financial Statements, purchase commitments discussed in Note 12 of the Consolidated Financial Statements and capital expenditures primarily related to infrastructure investments in our facilities, equipment and technology.
Deferred tax assets are recorded for tax benefit carryforwards using tax rates anticipated to be in effect in the year in which temporary differences are expected to reverse.
Deferred tax assets are recorded for tax benefit carryforwards using tax rates anticipated to be - 39 - Table of Contents in effect in the year in which temporary differences are expected to reverse.
Stock Based Compensation In connection with the Company's initial public offering (IPO), the Board approved the formation of the 2016 Incentive Award Plan (the “2016 Plan”), which replaced our 2014 Equity Incentive Plan (the “2014 Plan”). The 2016 Plan provides for long-term equity incentive compensation for key employees, officers and non-employee directors.
Stock Based Compensation In connection with the Company's initial public offering (IPO), the Board approved the 2016 Incentive Award Plan (the “2016 Plan”). The 2016 Plan provides for long-term equity incentive compensation for key employees, officers and non-employee directors.
Net new business awards were $1,829.5 million and $1,610.4 million for the years ended December 31, 2022 and 2021, respectively. Backlog represents anticipated future net revenue from net new business awards that have commenced, but have not been completed.
Net new business awards were $2,356.7 million and $1,829.5 million for the years ended December 31, 2023 and 2022, respectively. Backlog represents anticipated future net revenue from net new business awards that have commenced, but have not been completed.
The increase was primarily attributed to higher personnel costs to support the growth in service activities. Personnel costs increased by $18.6 million in the year ended December 31, 2022, compared to the same period in the prior year.
The increase was primarily attributed to higher personnel costs to support the growth in service activities. Personnel costs increased by $19.7 million in the year ended December 31, 2023, compared to the same period in the prior year.
As of December 31, 2022, we had $199.8 million available for borrowing under the Credit Facility. Our expected primary cash needs on both a short and long-term basis are for investment in operational growth, capital expenditures, credit facility repayments, share repurchases, selective strategic bolt-on acquisitions, other investments, and other general corporate needs.
As of December 31, 2023, we had $150.0 million available for borrowing under the Credit Facility. Our expected primary cash needs on both a short and long-term basis are for investment in operational growth, including additional lease commitments, capital expenditures, share repurchases, selective strategic bolt-on acquisitions, other investments, and other general corporate needs.
Net cash used in investing activities was $31.4 million for the year ended December 31, 2021, primarily consisting of property and equipment expenditures. - 35 - Table of Contents Cash Flow from Financing Activities Net cash used in financing activities was $775.8 million for the year ended December 31, 2022, primarily related to $847.8 million in repurchases of common stock and $274.2 million in repayments of the Credit Facility, partially offset by $324.2 million in proceeds related to the Credit Facility and proceeds from stock options exercises of $22.1 million.
Net cash used in financing activities was $775.8 million for the year ended December 31, 2022, primarily related to $847.8 million in repurchases of common stock and $274.2 million in repayments of the Credit Facility, partially offset by $324.2 million in proceeds from the Credit Facility and proceeds from stock options exercises of $22.1 million.
The higher personnel costs portion increased by $75.4 million in the year ended December 31, 2022, compared to the same period in the prior year. Selling, general and administrative Selling, general and administrative expenses increased by $23.0 million, to $131.4 million for the year ended December 31, 2022 from $108.4 million for the year ended December 31, 2021.
The higher personnel costs portion increased by $88.4 million in the year ended December 31, 2023, compared to the same period in the prior year. Selling, general and administrative Selling, general and administrative expenses increased by $30.0 million, to $161.4 million for the year ended December 31, 2023 from $131.4 million for the year ended December 31, 2022.
Reported backlog will fluctuate based on new business awards, changes in scope to existing contracts, cancellations, net revenue recognition on existing contracts and foreign exchange adjustments from non-U.S. dollar denominated backlog. As of December 31, 2022, our backlog increased by $342.5 million, or 17.2% to $2,339.6 million compared to $1,997.1 million as of December 31, 2021.
Reported backlog will fluctuate based on new business awards, changes in scope to existing contracts, cancellations, net revenue recognition on existing contracts and foreign exchange adjustments from non-U.S. dollar denominated backlog. As of December 31, 2023, our backlog increased by $473.4 million, or 20.2% to $2,813.0 million compared to $2,339.6 million as of December 31, 2022.
Depreciation and Amortization Depreciation and amortization expense increased by $1.2 million, to $22.3 million for the year ended December 31, 2022 from $21.1 million for the year ended December 31, 2021. The increase in depreciation and amortization was primarily related to increased depreciation related to Property and equipment, net.
Depreciation and Amortization Depreciation and amortization expense increased by $4.0 million, to $26.3 million for the year ended December 31, 2023 from $22.3 million for the year ended December 31, 2022. The increase in depreciation and amortization was primarily related to increased depreciation related to Property and equipment, net.
The Credit Facility contains certain events of default, including, among others, non-payment of principal or interest, breach of the covenants, cross default and cross acceleration to certain other indebtedness, defaults on monetary judgment orders, certain ERISA events, certain bankruptcy and insolvency events, actual or asserted invalidity of any guarantee or security document and change in control. - 36 - Table of Contents As of December 31, 2022, we had $50.0 million in indebtedness under the Credit Facility.
The Credit Facility contains certain events of default, including, among others, non-payment of principal or interest, breach of the covenants, cross default and cross acceleration to certain other indebtedness, defaults on monetary judgment orders, certain ERISA events, certain bankruptcy and insolvency events, actual or asserted invalidity of any guarantee or security document and change in control.
Based on the analysis of the above factors, we determined that as of December 31, 2022 and 2021 a valuation allowance in the amount of $0.4 million relating to certain foreign deferred tax assets and $0.9 million relating to certain foreign operating loss carryforwards and other deferred tax assets, respectively, that are currently not expected to be realized.
Based on the analysis of the above factors, we determined that a valuation allowance in the amount of $1.8 million relating to certain tax credits and other deferred tax assets should be recorded as of December 31, 2023 and $0.4 million should be recorded as of December 31, 2022 relating to certain foreign deferred tax assets that are currently not expected to be realized.
Capital spending as a percentage of revenue increased 6 basis points to 2.53% in the year ended - 34 - Table of Contents December 31, 2022. We expect these activities will be funded from existing cash, cash flow from operations and, if necessary, borrowings under our existing or future credit facilities or other debt.
Capital spending as a percentage of revenue decreased 59 basis points to 1.94% in the year ended December 31, 2023. We expect these activities will be funded from existing cash, cash flow from operations and, if necessary, borrowings under our existing or future credit facilities or other debt.
Income tax provision Income tax provision increased by $17.5 million, to $37.5 million for the year ended December 31, 2022 from $20.0 million for the year ended December 31, 2021. The overall effective tax rates for the years ended December 31, 2022 and 2021 were 13.3% and 9.9%, respectively.
Income tax provision Income tax provision increased by $15.4 million, to $52.9 million for the year ended December 31, 2023 from $37.5 million for the year ended December 31, 2022. The overall effective tax rates for the years ended December 31, 2023 and 2022 were 15.8% and 13.3%, respectively.
Total Direct Costs Total direct costs are primarily driven by labor and related employee benefits, but also include contracted third party service related expenses, fees paid to site investigators, reimbursed out of pocket expenses, laboratory supplies and other expenses contributing to service delivery.
Costs and Expenses Our costs and expenses are comprised primarily of our total direct costs, selling, general and administrative costs, depreciation and amortization and income taxes. - 32 - Table of Contents Total Direct Costs Total direct costs are primarily driven by labor and related employee benefits, but also include contracted third party service related expenses, fees paid to site investigators, reimbursed out of pocket expenses, laboratory supplies and other expenses contributing to service delivery.
Indebtedness On September 30, 2019 (the “Closing Date”), the Company obtained an unsecured credit facility in an aggregate principal amount up to $50.0 million (as amended from time to time, the “Credit Facility”) through its wholly owned subsidiaries, Medpace, Inc., as borrower (the “Borrower”), and Medpace IntermediateCo, Inc., as guarantor (the “Guarantor”).
The repurchase programs may be suspended or discontinued at any time without notice. - 37 - Table of Contents Indebtedness On September 30, 2019 (the “Closing Date”), the Company obtained an unsecured credit facility in an aggregate principal amount up to $50.0 million (as amended from time to time, the “Credit Facility”) through its wholly owned subsidiaries, Medpace, Inc., as borrower (the “Borrower”), and Medpace IntermediateCo, Inc., as guarantor (the “Guarantor”).
On March 15, 2022, the Company entered into Amendment No. 4 to the Loan Agreement, which increased the aggregate principal amount that may be borrowed under the facility’s line of credit to up to $250.0 million. The Company is expected to amend the Credit Facility or obtain a new credit facility prior to the March 31, 2023 expiration.
On March 15, 2022, the Company entered into Amendment No. 4 to the Loan Agreement, which increased the aggregate principal amount that may be borrowed under the facility’s line of credit to up to $250.0 million.
Year Ended December 31, Cash Flows (Amounts in thousands) 2022 2021 Net cash provided by operating activities $ 388,050 $ 263,327 Net cash used in investing activities (38,742) (31,364) Net cash used in financing activities (775,775) (44,453) Effect of exchange rates on cash, cash equivalents, and restricted cash (6,572) (3,972) (Decrease) increase in cash, cash equivalents, and restricted cash $ (433,039) $ 183,538 Cash Flows from Operating Activities Cash flows from operations are driven mainly by net income, stock-based compensation expense, noncash lease expense, depreciation and net movement in advanced billings, accrued expenses, and accounts receivable and unbilled, net.
Year Ended December 31, Cash Flows (Amounts in thousands) 2023 2022 Net cash provided by operating activities $ 433,374 $ 388,050 Net cash used in investing activities (34,629) (38,742) Net cash used in financing activities (182,642) (775,775) Effect of exchange rates on cash, cash equivalents, and restricted cash 1,081 (6,572) Increase (decrease) in cash, cash equivalents, and restricted cash $ 217,184 $ (433,039) Cash Flows from Operating Activities Cash flows from operations are driven mainly by net income, deferred income tax benefit, depreciation, stock-based compensation expense, noncash lease expense and net movement in advanced billings, accrued expenses, and accounts receivable and unbilled, net.
Net cash flows provided by operating activities were $263.3 million for the year ended December 31, 2021 consisting of net income of $181.8 million.
Net cash flows provided by operating activities were $433.4 million for the year ended December 31, 2023 consisting of net income of $282.8 million.
Adjustments to reconcile net income to net cash provided by operating activities were $14.8 million, primarily related to noncash lease expense of $16.3 million, depreciation of $16.0 million, stock-based compensation expense of $14.5 million and amortization of intangibles of $5.1 million, partially offset by a deferred income tax benefit of $37.1 million.
Adjustments to reconcile net income to net cash provided by operating activities were $44.1 million, primarily related to depreciation of $24.1 million, stock-based compensation expense of $20.5 million, and noncash lease expense of $19.6 million, partially offset by a deferred income tax benefit of $25.1 million.
As of December 31, 2022, we had $0.2 million in letters of credit outstanding related to certain operating lease obligations, which are secured by the Credit Facility.
As of December 31, 2023, we have no indebtedness and less than $0.1 million in letters of credit outstanding related to certain operating lease obligations, which are secured by the Credit Facility.
Miscellaneous income, net Miscellaneous income, net increased by $3.7 million to $7.1 million for the year ended December 31, 2022 from $3.3 million for the year ended December 31, 2021.
Miscellaneous (expense) income, net Miscellaneous (expense) income, net changed by $7.7 million of expense to $0.7 million of expense for the year ended December 31, 2023 from $7.1 million of income for the year ended December 31, 2022.
Retired share repurchase amounts paid in excess of par value are reflected within Accumulated deficit/Retained earnings in the Company’s consolidated balance sheets. The repurchase programs may be suspended or discontinued at any time without notice.
Retired share repurchase amounts paid in excess of par value are reflected within Accumulated deficit/Retained earnings in the Company’s consolidated balance sheets.
To assist with the estimation of costs expected at completion over the life of a project, regular contract reviews are performed in which performance to date is compared to the most current estimate to complete assumptions. The reviews include an assessment of costs incurred to date compared to expectations based on budget assumptions and other circumstances specific to the project.
To assist with the estimation of costs expected at completion over the life of a project, regular contract reviews are performed in which performance to date is compared to the most current estimate to complete - 38 - Table of Contents assumptions.
The increase was broad based, but primarily driven by strong activity within the Oncology, Metabolic, Cardiology and Central Nervous System therapeutic areas. - 33 - Table of Contents Total direct costs Total direct costs increased by $213.3 million, to $1,027.6 million for the year ended December 31, 2022 from $814.2 million for the year ended December 31, 2021.
The increase was broad based, but primarily driven by strong activity within the Metabolic, Oncology, AVAI and other uncategorized therapeutic areas. Total direct costs Total direct costs increased by $333.8 million, to $1,361.3 million for the year ended December 31, 2023 from $1,027.6 million for the year ended December 31, 2022.
We record revenue net of any tax assessments by governmental authorities that are imposed and concurrent with specific revenue generating transactions. Performance Obligations Substantially all of our contracts consist of a single performance obligation, as the promise to transfer the individual services described in the contracts are not separately identifiable from other promises in the contracts, and therefore not distinct.
Performance Obligations Substantially all of our contracts consist of a single performance obligation, as the promise to transfer the individual services described in the contracts are not separately identifiable from other promises in the contracts, and therefore not distinct.
For the year ended December 31, 2021, the Company repurchased 377,783 shares for $62.1 million. For the year ended December 31, 2020, the Company repurchased 1,183,095 shares for $98.3 million. As of June 30, 2022, the Company completed all authorized share repurchases under this repurchase program.
For the year ended December 31, 2021, the Company repurchased 377,783 shares for $62.1 million. As of June 30, 2022, the Company completed all authorized share repurchases under this repurchase program. In the fourth quarter of 2022, the Board approved a new stock repurchase program of up to $500.0 million.
In the fourth quarter of 2022, the Board approved a new stock repurchase program of up to $500.0 million. For the year ended December 31, 2022, the Company repurchased 228,247 shares for $47.2 million under the new repurchase program. As of December 31, 2022, we have remaining authorization of $452.8 million under the new repurchase program.
For the year ended December 31, 2023, the Company repurchased 781,068 shares for $144.0 million under the new repurchase program. For the year ended December 31, 2022, the Company repurchased 228,247 shares for $47.2 million under the new repurchase program. As of December 31, 2023, we have remaining authorization of $308.8 million under the new repurchase program.
The total estimated costs necessary to complete is updated and any revisions to the existing cost estimate results in cumulative adjustments to the amount of revenue recognized in the period in which the revisions are identified.
The reviews include an assessment of costs incurred to date compared to expectations based on budget assumptions and other circumstances specific to the project. The total estimated costs necessary to complete is updated and any revisions to the existing cost estimate results in cumulative adjustments to the amount of revenue recognized in the period in which the revisions are identified.
If the calculation of liability related to uncertain tax positions proves to be more or less than the ultimate assessment, a tax expense or benefit to expense, respectively would result. - 38 - Table of Contents As of December 31, 2022 and 2021, as a result of an updated analysis of future cash needs in the United States and opportunities for investment outside the United States, we assert that all foreign earnings will be indefinitely reinvested and therefore we have not provided taxes on these earnings.
As of December 31, 2023 and 2022, as a result of an updated analysis of future cash needs in the United States and opportunities for investment outside the United States, we assert that all foreign earnings will be indefinitely reinvested and therefore we have not provided taxes on these earnings.
As of December 31, 2022, we had cash and cash equivalents of $28.3 million, which decreased from $461.3 million as of December 31, 2021 due primarily to share repurchases. Approximately $9.7 million of our cash and cash equivalents, none of which was restricted, was held by our foreign subsidiaries as of December 31, 2022.
As of December 31, 2023, we had cash and cash equivalents of $245.4 million, which increased from $28.3 million as of December 31, 2022. Approximately $29.5 million of our cash and cash equivalents, none of which was restricted, was held by our foreign subsidiaries as of December 31, 2023.
Selling, General and Administrative Selling, general and administrative expenses are primarily driven by compensation and related employee benefits, as well as rent, utilities, supplies, software licenses, professional fees (e.g., legal and accounting expenses), travel, marketing and other operating expenses. - 31 - Table of Contents Depreciation Depreciation is provided on our property and equipment on the straight-line method at rates adequate to allocate the cost of the applicable assets over their estimated useful lives, which is three to five years for computer hardware, software, phone, and medical imaging equipment, five to seven years for furniture and fixtures and other equipment, and thirty to forty years for buildings.
Depreciation Depreciation is provided on our property and equipment on the straight-line method at rates adequate to allocate the cost of the applicable assets over their estimated useful lives, which is three to five years for computer hardware, software, phone, and medical imaging equipment, five to seven years for furniture and fixtures and other equipment, and thirty to forty years for buildings.
We attempt to negotiate payment terms in order to provide for payments prior to or soon after the provision of services, but this timing of collection can vary significantly on a period by period comparative basis. Net cash flows provided by operating activities were $388.1 million for the year ended December 31, 2022 consisting of net income of $245.4 million.
We attempt to negotiate payment terms - 36 - Table of Contents in order to provide for payments prior to or soon after the provision of services, but this timing of collection can vary significantly on a period by period comparative basis.
Net cash used in financing activities was $44.5 million for the year ended December 31, 2021, primarily related to $62.1 million in repurchases of common stock, offset by proceeds from stock options exercises of $17.6 million.
Cash Flow from Financing Activities Net cash used in financing activities was $182.6 million for the year ended December 31, 2023, primarily related to $155.0 million in repayments of the Credit Facility and $144.0 million in repurchases of common stock, partially offset by $105.0 million in proceeds from the Credit Facility and proceeds from stock options exercises of $11.4 million.
Certain contracts contain volume rebate arrangements with our customers that provide for rebates if certain specified spending thresholds are met.
Certain contracts contain volume rebate arrangements with our customers that provide for rebates if certain specified spending thresholds are met. These obligations are considered as a reduction in revenue when it appears probable that the arrangement thresholds will be met.
Changes in operating assets and liabilities provided $66.7 million in operating cash flows and were primarily driven by increased advanced billings of $89.0 million and increased accrued expenses of $26.2 million, offset by increased accounts receivable and unbilled, net of $25.0 million, decreased lease liabilities of $15.6 million and increased prepaid expenses and other current assets of $9.1 million.
Changes in operating assets and liabilities provided $106.5 million in operating cash flows and were primarily driven by by increased advanced billings of $97.1 million and increased accrued expenses of $82.1 million, partially offset by increased accounts receivable and unbilled, net of $48.3 million.
Included within backlog as of December 31, 2022 was approximately $1,200.0 million to $1,220.0 million that we expect to convert to net revenue in 2023, with the remainder expected to convert to net revenue in years after 2023. - 32 - Table of Contents The effect of foreign currency adjustments on backlog was as follows: unfavorable foreign currency adjustments of $19.1 million for the year ended December 31, 2022 and unfavorable foreign currency adjustments of $5.5 million for the year ended December 31, 2021.
Included within backlog as of December 31, 2023 was approximately $1,520.0 million to $1,540.0 million that we expect to convert to net revenue in 2024, with the remainder expected to convert to net revenue in years after 2024.
For a comparison of our results of operations for the fiscal years ended December 31, 2021 and December 31, 2020, see “Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021, filed with the SEC on February 15, 2022.
For a comparison of our results of operations for the fiscal years ended December 31, 2022 and December 31, 2021, see “Part II, Item 7.
These obligations are considered as a reduction in revenue when it appears probable that the arrangement thresholds will be met. - 37 - Table of Contents We occasionally enter into incentive fee arrangements with customers that provide for additional compensation if certain defined contractual milestones or performance thresholds are met.
We occasionally enter into incentive fee arrangements with customers that provide for additional compensation if certain defined contractual milestones or performance thresholds are met. These additional fees are included in the estimated transaction price when there is a basis to reasonably estimate the amount of the fee and when achievement of the incentive milestone is deemed probable.
The increase in the income tax provision and overall effective rate was primarily attributable to the increase in pre-tax book income compared to the same periods in the prior year. Liquidity and Capital Resources We assess our liquidity in terms of our ability to generate cash to fund our operating, investing and financing activities.
Liquidity and Capital Resources We assess our liquidity in terms of our ability to generate cash to fund our operating, investing and financing activities.
The weighted average grant date fair value of employee stock options granted was $47.57, $52.70 and $15.19 for the years ended December 31, 2022, 2021 and 2020, respectively. - 39 - Table of Contents Effect of Recent Accounting Pronouncements Refer to Note 2 of the Notes to Consolidated Financial Statements for management’s discussion of the effect of recent accounting pronouncements.
As of December 31, 2023, all outstanding stock based awards were classified within equity. The weighted average grant date fair value of employee stock options granted was $85.30, $47.57 and $52.70 for the years ended December 31, 2023, 2022 and 2021, respectively.
Year Ended December 31, 2022 compared to Year Ended December 31, 2021 Year Ended December 31, (Amounts in thousands, except percentages) 2022 2021 Change % Change Revenue, net $ 1,459,996 $ 1,142,377 $ 317,619 27.8 % Direct service costs, excluding depreciation and amortization 534,887 441,090 93,797 21.3 % Reimbursed out-of-pocket expenses 492,671 373,132 119,539 32.0 % Total direct costs 1,027,558 814,222 213,336 26.2 % Selling, general and administrative 131,400 108,421 22,979 21.2 % Depreciation 18,989 16,005 2,984 18.6 % Amortization 3,352 5,114 (1,762) (34.5) % Total operating expenses 1,181,299 943,762 237,537 25.2 % Income from operations 278,697 198,615 80,082 Miscellaneous income, net 7,068 3,342 3,726 Interest (expense) income, net (2,905) (105) (2,800) Income before income taxes 282,860 201,852 81,008 Income tax provision 37,492 20,004 17,488 Net income $ 245,368 $ 181,848 $ 63,520 Total revenue Total revenue increased by $317.6 million to $1,460.0 million for the year ended December 31, 2022, from $1,142.4 million for the year ended December 31, 2021.
Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed with the SEC on February 14, 2023. - 34 - Table of Contents Year Ended December 31, 2023 compared to Year Ended December 31, 2022 Year Ended December 31, (Amounts in thousands, except percentages) 2023 2022 Change % Change Revenue, net $ 1,885,842 $ 1,459,996 $ 425,846 29.2 % Direct service costs, excluding depreciation and amortization 638,249 534,887 103,362 19.3 % Reimbursed out-of-pocket expenses 723,088 492,671 230,417 46.8 % Total direct costs 1,361,337 1,027,558 333,779 32.5 % Selling, general and administrative 161,352 131,400 29,952 22.8 % Depreciation 24,129 18,989 5,140 27.1 % Amortization 2,199 3,352 (1,153) (34.4) % Total operating expenses 1,549,017 1,181,299 367,718 31.1 % Income from operations 336,825 278,697 58,128 Miscellaneous (expense) income, net (655) 7,068 (7,723) Interest expense, net (488) (2,905) 2,417 Income before income taxes 335,682 282,860 52,822 Income tax provision 52,872 37,492 15,380 Net income $ 282,810 $ 245,368 $ 37,442 Total revenue Total revenue increased by $425.8 million to $1,885.8 million for the year ended December 31, 2023, from $1,460.0 million for the year ended December 31, 2022.
Refer to "Critical Accounting Policies and Estimates—Revenue Recognition," below. Costs and Expenses Our costs and expenses are comprised primarily of our total direct costs, selling, general and administrative costs, depreciation and amortization and income taxes.
Refer to "Critical Accounting Policies and Estimates—Revenue Recognition," below.
These additional fees are included in the estimated transaction price when there is a basis to reasonably estimate the amount of the fee and when achievement of the incentive milestone is deemed probable. These estimates are based on anticipated performance, our best judgment at the time or ultimately, upon achievement of the threshold or milestone.
These estimates are based on anticipated performance, our best judgment at the time or ultimately, upon achievement of the threshold or milestone. We record revenue net of any tax assessments by governmental authorities that are imposed and concurrent with specific revenue generating transactions.