Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim condensed consolidated financial statements and related notes have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and applicable rules and regulations of the United States Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Accordingly, they do not include all disclosures normally required in annual consolidated financial statements prepared in accordance with GAAP. Therefore, these unaudited condensed consolidated financial statements and related notes should be read in conjunction with the audited consolidated financial statements and the related notes included in the Company's Form 10-K for the year ended December 31, 2023 filed with the SEC on March 5, 2024 (the “2023 Form 10-K”). These unaudited interim condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the Company’s financial position, results of operations and comprehensive income, changes in stockholders' equity and cash flows for the periods presented. The results of operations for the three months ended March 31, 2024 and 2023 are not necessarily indicative of the results to be expected for the full year or any other future interim or annual period.
Principles of Consolidation	Principles of Consolidation The unaudited interim condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and balances have been eliminated upon consolidation.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Such estimates include revenue recognition, cost of revenue recognition, the allowance for credit losses, the lives of tangible and intangible assets, the valuation of acquired intangible assets and the recoverability or impairment of intangible assets, including goodwill, internal-use software development costs, valuation of stock warrants issued, stock-based compensation, and accounting for income taxes. The Company bases its estimates on historical experience and also on assumptions that management considers reasonable. The Company assesses these estimates on a regular basis; however, actual results could differ from these estimates.
Custodial Accounts	Custodial Accounts The Company has established a relationship with its merchant processors to act as collection and paying agents, whereby a merchant processor receives funds from customers and forwards such funds to the respective Paymentus client, based on the instructions received from the Company. These merchant processors act as custodians of the cash received, and the Company has no legal ownership rights to the funds held in such custodial accounts and does not control the use of these funds. As the Company does not take ownership of the funds, these custodial accounts are not included in the Company’s consolidated balance sheets. The balance of cash in the custodial accounts held by these merchant processors was $427.7 million and $510.8 million as of March 31, 2024 and December 31, 2023, respectively.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to credit risk primarily consist of cash, cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents with high-quality financial institutions with investment-grade ratings. For accounts receivable, the Company is exposed to credit risk in the event of nonpayment by customers and resellers to the extent of the amounts recorded in the consolidated balance sheets. No customer accounted for more than 10% of revenue for either of the three months ended March 31, 2024 and 2023. As of December 31, 2023, one customer accounted for more than 10% of accounts receivable. As of March 31, 2024, no customer accounted for more than 10% of accounts receivable.
Segment Information	Segment Information Operating segments are defined as components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to make operating decisions, allocate resources and assess performance. The Company has three operating segments based on geography. The United States segment represents the vast majority of the Company’s consolidated net sales and gross profit. The additional two operating segments, Canada and India, do not meet the quantitative thresholds for separate reporting, either individually or in the aggregate. None of the operating segments qualified for aggregation. The Company’s CODM is its chief executive officer. The CODM evaluates the performance of the Company’s operating segments based on revenue and gross profit. The Company does not analyze discrete segment balance sheet information related to long-term assets. All other financial information is presented on a consolidated basis. For information regarding the Company’s long-lived assets and revenue by geographic area, see Note 4 and Note 3, respectively.
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The Company’s significant accounting policies are discussed in Note 2, “Basis of Presentation and Summary of Significant Accounting Policies,” in the Notes to Consolidated Financial Statements as of December 31, 2023 and 2022 and for the years ended December 31, 2023, 2022 and 2021 included in the 2023 Form 10-K. There have been no significant changes to these policies during the three months ended March 31, 2024.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards The Company is provided the option to adopt new or revised accounting guidance as an “emerging growth company” under the Jumpstart Our Business Startups Act of 2012 either (1) within the same periods as those otherwise applicable to public business entities, or (2) within the same time periods as non-public business entities, including early adoption when permissible. With the exception of standards the Company elected to early adopt, when permissible, the Company has elected to adopt new or revised accounting guidance within the same time period as non-public business entities, as indicated below. Accounting Standards Updates ("ASU") not listed below were assessed and determined to be either not applicable or are not expected to have a material impact on the consolidated financial statements. Accounting Pronouncements Not Yet Adopted In November 2023, the Financial Accounting Standards Board ("FASB") issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. ASU 2023-07 expands public entities’ segment disclosures by requiring disclosure of significant segment expenses that are regularly provided to the CODM and included within each reported measure of segment profit or loss, an amount and description of its composition for other segment items, and interim disclosures of a reportable segment’s profit or loss and assets. All disclosure requirements under ASU 2023-07 are also required for public entities with a single reportable segment. The amendments in ASU 2023-07 are effective for public companies for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. We are currently evaluating the potential impact of adopting this new guidance on our condensed consolidated financial statements and related disclosures. In December 2023, the FASB issued ASU 2023-09 "Income Tax Disclosures", which makes changes to annual disclosures of income taxes paid for all entities and requires entities to disclose the amount of income taxes paid, net of refunds received, disaggregated by federal, state and foreign jurisdiction. Additionally, entities are required to disclose income taxes paid, net of refunds received, for individual jurisdictions that comprise 5% or more of total income taxes paid. The 5% threshold is evaluated using the absolute value of the net refund or net payment in each jurisdiction compared to the absolute value of the total income taxes paid (net of refunds received). ASU 2023-09 requires all entities to disclose disaggregated domestic and foreign pre-tax income (or loss) from continuing operations along with disaggregated income tax expense (or benefit) by federal, state and foreign components. Such disaggregation by jurisdiction should classify taxes by jurisdiction based on the jurisdiction imposing the taxes. The amendments in ASU 2023-09 are effective for fiscal years beginning after December 15, 2024 for public companies. Early adoption is permitted. We are currently evaluating the potential impact of adopting this new guidance on our condensed consolidated financial statements and related disclosures.

Basis of Presentation and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

The accompanying unaudited interim condensed consolidated financial statements and related notes have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and applicable rules and regulations of the United States Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Accordingly, they do not include all disclosures normally required in annual consolidated financial statements prepared in accordance with GAAP. Therefore, these unaudited condensed consolidated financial statements and related notes should be read in conjunction with the audited consolidated financial statements and the related notes included in the Company's Form 10-K for the year ended December 31, 2023 filed with the SEC on March 5, 2024 (the “2023 Form 10-K”).

These unaudited interim condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the Company’s financial position, results of operations and comprehensive income, changes in stockholders' equity and cash flows for the periods presented. The results of operations for the three months ended March 31, 2024 and 2023 are not necessarily indicative of the results to be expected for the full year or any other future interim or annual period.

Principles of Consolidation

The unaudited interim condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and balances have been eliminated upon consolidation.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Such estimates include revenue recognition, cost of revenue recognition, the allowance for credit losses, the lives of tangible and intangible assets, the valuation of acquired intangible assets and the recoverability or impairment of intangible assets, including goodwill, internal-use software development costs, valuation of stock warrants issued, stock-based compensation, and accounting for income taxes. The Company bases its estimates on historical experience and also on assumptions that management considers reasonable. The Company assesses these estimates on a regular basis; however, actual results could differ from these estimates.

Custodial Accounts

The Company has established a relationship with its merchant processors to act as collection and paying agents, whereby a merchant processor receives funds from customers and forwards such funds to the respective Paymentus client, based on the instructions received from the Company. These merchant processors act as custodians of the cash received, and the Company has no legal ownership rights to the funds held in such custodial accounts and does not control the use of these funds. As the Company does not take ownership of the funds, these custodial accounts are not included in the Company’s consolidated balance sheets. The balance of cash in the custodial accounts held by these merchant processors was $427.7 million and $510.8 million as of March 31, 2024 and December 31, 2023, respectively.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to credit risk primarily consist of cash, cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents with high-quality financial institutions with investment-grade ratings. For accounts receivable, the Company is exposed to credit risk in the event of nonpayment by customers and resellers to the extent of the amounts recorded in the consolidated balance sheets. No customer accounted for more than 10% of revenue for either of the three months ended March 31, 2024 and 2023. As of December 31, 2023, one customer accounted for more than 10% of accounts receivable. As of March 31, 2024, no customer accounted for more than 10% of accounts receivable.

Segment Information

Operating segments are defined as components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to make operating decisions, allocate resources and assess performance. The Company has three operating segments based on geography. The United States segment represents the vast majority of the Company’s consolidated net sales and gross profit. The additional two operating segments, Canada and India, do not meet the quantitative thresholds for separate reporting, either individually or in the aggregate. None of the operating segments qualified for aggregation. The Company’s CODM is its chief executive officer. The CODM evaluates the performance of the Company’s operating segments based on revenue and gross profit. The Company does not analyze discrete segment balance sheet information related to long-term assets. All other financial information is presented on a consolidated basis. For information regarding the Company’s long-lived assets and revenue by geographic area, see Note 4 and Note 3, respectively.

Summary of Significant Accounting Policies

The Company’s significant accounting policies are discussed in Note 2, “Basis of Presentation and Summary of Significant Accounting Policies,” in the Notes to Consolidated Financial Statements as of December 31, 2023 and 2022 and for the years ended December 31, 2023, 2022 and 2021 included in the 2023 Form 10-K. There have been no significant changes to these policies during the three months ended March 31, 2024.

Recently Adopted Accounting Standards

The Company is provided the option to adopt new or revised accounting guidance as an “emerging growth company” under the Jumpstart Our Business Startups Act of 2012 either (1) within the same periods as those otherwise applicable to public business entities, or (2) within the same time periods as non-public business entities, including early adoption when permissible. With the exception of standards the Company elected to early adopt, when permissible, the Company has elected to adopt new or revised accounting guidance within the same time period as non-public business entities, as indicated below.

Accounting Standards Updates ("ASU") not listed below were assessed and determined to be either not applicable or are not expected to have a material impact on the consolidated financial statements.

Accounting Pronouncements Not Yet Adopted

In November 2023, the Financial Accounting Standards Board ("FASB") issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. ASU 2023-07 expands public entities’ segment disclosures by requiring disclosure of significant segment expenses that are regularly provided to the CODM and included within each reported measure of segment profit or loss, an amount and description of its composition for other segment items, and interim disclosures of a reportable segment’s profit or loss and assets. All disclosure requirements under ASU 2023-07 are also required for public entities with a single reportable segment. The amendments in ASU 2023-07 are effective for public companies for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. We are currently evaluating the potential impact of adopting this new guidance on our condensed consolidated financial statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09 "Income Tax Disclosures", which makes changes to annual disclosures of income taxes paid for all entities and requires entities to disclose the amount of income taxes paid, net of refunds received, disaggregated by federal, state and foreign jurisdiction. Additionally, entities are required to disclose income taxes paid, net of refunds received, for individual jurisdictions that comprise 5% or more of total income taxes paid. The 5% threshold is evaluated using the absolute value of the net refund or net payment in each jurisdiction compared to the absolute value of the total income taxes paid (net of refunds received). ASU 2023-09 requires all entities to disclose disaggregated domestic and foreign pre-tax income (or loss) from continuing operations along with disaggregated income tax expense (or benefit) by federal, state and foreign components. Such disaggregation by jurisdiction should classify taxes by jurisdiction based on the jurisdiction imposing the taxes. The amendments in ASU 2023-09 are effective for fiscal years

beginning after December 15, 2024 for public companies. Early adoption is permitted. We are currently evaluating the potential impact of adopting this new guidance on our condensed consolidated financial statements and related disclosures.

- Definition

Disclosure of accounting policy for segment reporting.

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