Summary of Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and the applicable rules and regulations of the Securities and Exchange Commission, (“SEC”), for interim reporting. Certain information and note disclosures included in the Company’s annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The Condensed Consolidated Balance Sheet as of December 31, 2022 has been derived from the Company’s audited consolidated financial statements, which are included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, which was filed with the SEC on February 28, 2023. The accompanying Condensed Consolidated Financial Statements should be read in conjunction with the Company’s consolidated financial statements and notes thereto included in the Annual Report on Form 10-K. The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. In the opinion of management, the accompanying Condensed Consolidated Financial Statements reflect all adjustments of a normal, recurring nature considered necessary for a fair presentation of the Company's consolidated financial position, results of operations, comprehensive loss, and cash flows for the interim periods presented. The interim results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023, or for any other future annual or interim period.
Use of Estimates	Use of Estimates The preparation of the financial statements requires management to make estimates and assumptions relating to reported amounts of assets and liabilities, disclosure of contingent liabilities, and reported amounts of revenue and expenses. Significant estimates and assumptions include, but are not limited to, the fair value and useful lives of assets acquired and liabilities assumed through business combinations, the estimation of contingent liabilities, the estimation of variable consideration in contracts with customers, and the reserve for contract contingencies and processing errors. Actual results could differ materially from these estimates.
Segment Information	Segment Information The Company operates as a single operating segment. The Company's chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance, allocating resources, and evaluating the Company's financial performance.
Restricted Cash	Restricted Cash Restricted cash consists of deposits with financial institutions that issue payment cards (credit, debit, or prepaid) either on their own behalf or on behalf of businesses that issue customized card products to their end users (“Issuing Banks”) to provide the Issuing Bank collateral in the event that customers’ funds are not deposited at the Issuing Banks in time to settle customers’ transactions with the networks that provide the infrastructure for settlement and card payment information flows (“Card Networks”). Restricted cash also includes cash used to secure a letter of credit for the Company’s lease of its office headquarters in Oakland, California.
Capitalized Internal-use Software Development Costs	Capitalized Internal-use Software Development Costs The Company capitalizes certain costs incurred in developing internal-use software when capitalization requirements have been met. Internal and external costs incurred in the preliminary project stage of internal-use software development are expensed as incurred. Once the software development process reaches the application development stage, qualifying internal costs including compensation and benefits costs of employees who are directly associated with and devote time to the software project as well as external direct costs are capitalized. Capitalization of costs ends when the developed software is substantially complete and ready for its intended internal use, which is typically upon completion of all substantial testing. Capitalized internal-use software development costs are included in property and equipment, net, and then amortized on a straight-line basis over the estimated useful life of the software. The amortization of these costs is recorded within Depreciation and amortization expense on the Condensed Consolidated Statements of Operations and Comprehensive Loss.
Business Combinations	Business Combinations The Company allocates the purchase consideration for acquired companies to tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date, with the excess recorded to goodwill. These estimates are inherently uncertain and subject to refinement. During the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of these tangible and intangible assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Condensed Consolidated Statements of Operations and Comprehensive Loss. Acquisition-related expenses and postcombination integration and employee compensation costs are recognized separately from the business combination and are expensed as incurred.
Goodwill and Acquisition-related Intangible Assets	Goodwill and Intangible AssetsThe excess purchase price over the fair value of assets acquired is recorded as goodwill. Goodwill amounts are not amortized. Intangible assets with finite lives are amortized over their estimated useful lives on a straight-line basis. Goodwill and intangible assets are tested for impairment at least annually, and more frequently whenever events or changes in circumstances indicate its carrying value may not be recoverable.
Deferred Contract Costs	Deferred Contract Costs Deferred contract costs mainly consist of sales commissions and related fringe benefits that are incremental costs of obtaining contracts with customers. The Company amortizes the costs incurred on initial contracts on a straight-line basis over an estimated period of benefit determined to be approximately four years. The period of benefit is determined based on a review of customer contract terms and churn rates. The Company utilizes the practical expedient to expense commissions on arrangements in which the amortization period is expected to be one year or less. Deferred contract costs that will be recognized during the succeeding 12-month period are recorded as Prepaid expenses and other current assets, and the remaining portion is recorded as Other assets on the Condensed Consolidated Balance Sheets. The amortization of these costs is recorded within Compensation and benefits expenses on the Condensed Consolidated Statements of Operations and Comprehensive Loss. The Company's contracts with customers include certain service level agreements which could require the Company to make payments to customers if service levels are not met. Any service level payment is recorded as a reduction to Net Revenue in the Condensed Consolidated Statements of Operations and Comprehensive Loss. Historically, the Company did not capitalize material costs to acquire contracts.
Restructuring	RestructuringRestructuring costs stem from employee related severance charges and include both cash and non-cash compensation. The Company generally recognizes restructuring costs upon communication of the plan to the identified employees or when payments are probable and amounts are estimable, depending on the region an employee works. Restructuring liabilities are classified in Accrued expenses and other current liabilities in the Condensed Consolidated Balance Sheets
Revenue Recognition	Revenue Recognition Revenue is recognized when control of the promised goods or services is transferred to customers, in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company’s contracts with customers typically include two performance obligations: 1) providing access to the Company's payment processing platform and 2) providing card fulfillment services. Certain customer contracts require the Company to allocate the transaction price of the contract based on the relative stand-alone selling price of the performance obligations, which are estimated using an analysis of the Company’s historical contract pricing and costs incurred to fulfill its services. The Company generates revenue from providing platform services and other services as described below. Platform Services The Company delivers an integrated payment processing platform to its customers. The Company’s primary performance obligation is to provide customers continuous access to the Company’s platform used to process all customers’ transactions as needed. This obligation includes authorizing, settling, clearing, and reconciling all transactions under Managed By Marqeta (“MxM”) and Powered By Marqeta (“PxM”) arrangements. Additionally, for MxM arrangements, the performance obligation also includes managing the interactions with the Issuing Banks and certain Card Networks on behalf of its customers. All these services are collectively considered a single performance obligation. The Company’s platform services revenue is primarily derived from Interchange Fees generated by customer card transactions and other transaction fees collected from customers. The Company accounts for these Interchange Fees as revenue earned from its customers because the Company controls the services before delivery to the customer. The Company’s platform services revenue consists of a stand-ready service of distinct transaction processing services that are substantially the same, with the same pattern of transfer to customers. As such, the stand-ready obligation is accounted for as a single performance obligation that is a series of distinct services whereby the variability of the transaction value is satisfied daily as the performance obligation is satisfied. The Company satisfies its performance obligation to provide platform services over time as customers have continuous access to the Company's platform and the Company stands-ready to process customer transactions throughout their term of access. The Company recognizes revenue when the underlying transactions are complete, and its performance obligation is satisfied. Transactions are considered complete when the Company has authorized the transaction, validated that the transaction has no errors, and accepted and posted the data to its records. The Company allocates variable consideration to the distinct month in which the platform services are delivered. When pricing terms are not consistent throughout the entire term of the contract, the Company estimates variable consideration in its customer contracts primarily using the expected value method. The standard term of the customer contracts ranges from three to five years, with automatic renewal for successive one-year periods thereafter unless either party provides written notice of its intent not to renew. The Company develops estimates of variable consideration on the basis of both historical information and current trends and does not expect or anticipate significant reversal of revenue in the future periods. In arrangements where the Company is both the Issuer Processor and Program Manager , the Company is the principal in providing the services under its contracts with customers. To deliver the services required by its customers, the Company contracts with Card Networks for transaction routing, reporting, and settlement services and with Issuing Banks for card issuing, Card Network sponsorship, and regulatory compliance approval services. The Company controls these integrated services before delivery to its customers; it is primarily responsible for the delivery of the services to customers, and it has discretion in vendor selection. As such, the Company records fees paid to the Issuing Banks and Card Networks as Costs of Revenue within the Condensed Consolidated Statements of Operations and Comprehensive Loss. In certain customer arrangements, the customer is directly responsible for defining and managing the Card Network relationship for their card program. In these instances, the Company is considered an agent in providing services to the customer thus fees owed to Issuing Banks and Card Networks related to these programs are recorded within Net Revenue such that Net Revenue in the Condensed Consolidated Statements of Operations and Comprehensive Loss reflects the net amount of consideration that the Company retains. In arrangements where the Company acts solely as the Issuer Processor, the Company does not integrate the services of Issuing Banks or Card Networks.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2023

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and the applicable rules and regulations of the Securities and Exchange Commission, (“SEC”), for interim reporting. Certain information and note disclosures included in the Company’s annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The Condensed Consolidated Balance Sheet as of December 31, 2022 has been derived from the Company’s audited consolidated financial statements, which are included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, which was filed with the SEC on February 28, 2023. The accompanying Condensed Consolidated Financial Statements should be read in conjunction with the Company’s consolidated financial statements and notes thereto included in the Annual Report on Form 10-K.

The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. In the opinion of management, the accompanying Condensed Consolidated Financial Statements reflect all adjustments of a normal, recurring nature considered necessary for a fair presentation of the Company's consolidated financial position, results of operations, comprehensive loss, and cash flows for the interim periods presented. The interim results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023, or for any other future annual or interim period.

Use of Estimates

The preparation of the financial statements requires management to make estimates and assumptions relating to reported amounts of assets and liabilities, disclosure of contingent liabilities, and reported amounts of revenue and expenses. Significant estimates and assumptions include, but are not limited to, the fair value and useful lives of assets acquired and liabilities assumed through business combinations, the estimation of contingent liabilities, the estimation of variable consideration in contracts with customers, and the reserve for contract contingencies and processing errors. Actual results could differ materially from these estimates.

Segment Information

The Company operates as a single operating segment. The Company's chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance, allocating resources, and evaluating the Company's financial performance.

Restricted Cash

Restricted cash consists of deposits with financial institutions that issue payment cards (credit, debit, or prepaid) either on their own behalf or on behalf of businesses that issue customized card products to their end users (“Issuing Banks”) to provide the Issuing Bank collateral in the event that customers’ funds are not deposited at the Issuing Banks in time to settle customers’ transactions with the networks that provide the infrastructure for settlement and card payment information flows (“Card Networks”). Restricted cash also includes cash used to secure a letter of credit for the Company’s lease of its office headquarters in Oakland, California.

Capitalized Internal-use Software Development Costs

The Company capitalizes certain costs incurred in developing internal-use software when capitalization requirements have been met. Internal and external costs incurred in the preliminary project stage of internal-use software development are expensed as incurred. Once the software development process reaches the application development stage, qualifying internal costs including compensation and benefits costs of employees who are directly associated with and devote time to the software project as well as external direct costs are capitalized. Capitalization of costs ends when the developed software is substantially complete and ready for its intended internal use, which is typically upon completion of all substantial testing. Capitalized internal-use software development costs are included in property and equipment, net, and then amortized on a straight-line basis over the estimated useful life of the software. The amortization of these costs is recorded within Depreciation and amortization expense on the Condensed Consolidated Statements of Operations and Comprehensive Loss.

Business Combinations

The Company allocates the purchase consideration for acquired companies to tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date, with the excess recorded to goodwill. These estimates are inherently uncertain and subject to refinement. During the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of these tangible and intangible assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Condensed Consolidated Statements of Operations and Comprehensive Loss. Acquisition-related expenses and postcombination integration and employee compensation costs are recognized separately from the business combination and are expensed as incurred.

Goodwill and Acquisition-related Intangible Assets

Goodwill and Intangible AssetsThe excess purchase price over the fair value of assets acquired is recorded as goodwill. Goodwill amounts are not amortized. Intangible assets with finite lives are amortized over their estimated useful lives on a straight-line basis. Goodwill and intangible assets are tested for impairment at least annually, and more frequently whenever events or changes in circumstances indicate its carrying value may not be recoverable.

Deferred Contract Costs

Deferred contract costs mainly consist of sales commissions and related fringe benefits that are incremental costs of obtaining contracts with customers. The Company amortizes the costs incurred on initial contracts on a straight-line basis over an estimated period of benefit determined to be approximately four years. The period of benefit is determined based on a review of customer contract terms and churn rates. The Company utilizes the practical expedient to expense commissions on arrangements in which the amortization period is expected to be one year or less. Deferred contract costs that will be recognized during the succeeding 12-month period are recorded as Prepaid expenses and other current assets, and the remaining portion is recorded as Other assets on the Condensed Consolidated Balance Sheets. The amortization of these costs is recorded within Compensation and benefits expenses on the Condensed Consolidated Statements of Operations and Comprehensive Loss.

The Company's contracts with customers include certain service level agreements which could require the Company to make payments to customers if service levels are not met. Any service level payment is recorded as a reduction to Net Revenue in the Condensed Consolidated Statements of Operations and Comprehensive Loss. Historically, the Company did not capitalize material costs to acquire contracts.

Restructuring

RestructuringRestructuring costs stem from employee related severance charges and include both cash and non-cash compensation. The Company generally recognizes restructuring costs upon communication of the plan to the identified employees or when payments are probable and amounts are estimable, depending on the region an employee works. Restructuring liabilities are classified in Accrued expenses and other current liabilities in the Condensed Consolidated Balance Sheets

Revenue Recognition

Revenue is recognized when control of the promised goods or services is transferred to customers, in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services.

The Company’s contracts with customers typically include two performance obligations: 1) providing access to the Company's payment processing platform and 2) providing card fulfillment services. Certain customer contracts require the Company to allocate the transaction price of the contract based on the relative stand-alone selling price of the performance obligations, which are estimated using an analysis of the Company’s historical contract pricing and costs incurred to fulfill its services.

The Company generates revenue from providing platform services and other services as described below.

Platform Services

The Company delivers an integrated payment processing platform to its customers. The Company’s primary performance obligation is to provide customers continuous access to the Company’s platform used to process all customers’ transactions as needed. This obligation includes authorizing, settling, clearing, and reconciling all transactions under Managed By Marqeta (“MxM”) and Powered By Marqeta (“PxM”) arrangements. Additionally, for MxM arrangements, the performance obligation also includes managing the interactions with the Issuing Banks and certain Card Networks on behalf of its customers. All these services are collectively considered a single performance obligation.

The Company’s platform services revenue is primarily derived from Interchange Fees generated by customer card transactions and other transaction fees collected from customers. The Company accounts for these Interchange Fees as revenue earned from its customers because the Company controls the

services before delivery to the customer.

The Company’s platform services revenue consists of a stand-ready service of distinct transaction processing services that are substantially the same, with the same pattern of transfer to customers. As such, the stand-ready obligation is accounted for as a single performance obligation that is a series of distinct services whereby the variability of the transaction value is satisfied daily as the performance obligation is satisfied. The Company satisfies its performance obligation to provide platform services over time as customers have continuous access to the Company's platform and the Company stands-ready to process customer transactions throughout their term of access.

The Company recognizes revenue when the underlying transactions are complete, and its performance obligation is satisfied. Transactions are considered complete when the Company has authorized the transaction, validated that the transaction has no errors, and accepted and posted the data to its records.

The Company allocates variable consideration to the distinct month in which the platform services are delivered. When pricing terms are not consistent throughout the entire term of the contract, the Company estimates variable consideration in its customer contracts primarily using the expected value method. The standard term of the customer contracts ranges from three to five years, with automatic renewal for successive one-year periods thereafter unless either party provides written notice of its intent not to renew. The Company develops estimates of variable consideration on the basis of both historical information and current trends and does not expect or anticipate significant reversal of revenue in the future periods.

In arrangements where the Company is both the Issuer Processor and Program Manager , the Company is the principal in providing the services under its contracts with customers. To deliver the services required by its customers, the Company contracts with Card Networks for transaction routing, reporting, and settlement services and with Issuing Banks for card issuing, Card Network sponsorship, and regulatory compliance approval services. The Company controls these integrated services before delivery to its customers; it is primarily responsible for the delivery of the services to customers, and it has discretion in vendor selection. As such, the Company records fees paid to the Issuing Banks and Card Networks as Costs of Revenue within the Condensed Consolidated Statements of Operations and Comprehensive Loss. In certain customer arrangements, the customer is directly responsible for defining and managing the Card Network relationship for their card program. In these instances, the Company is considered an agent in providing services to the customer thus fees owed to Issuing Banks and Card Networks related to these programs are recorded within Net Revenue such that Net Revenue in the Condensed Consolidated Statements of Operations and Comprehensive Loss reflects the net amount of consideration that the Company retains. In arrangements where the Company acts solely as the Issuer Processor, the Company does not integrate the services of Issuing Banks or Card Networks.