0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 0000002 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - Condensed Consolidated Statements of Stockholders’ Equity link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 0000007 - Disclosure - Description of Business and Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 0000008 - Disclosure - Revenue link:presentationLink link:calculationLink link:definitionLink 0000009 - Disclosure - Variable Interest Entities link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - Derivative Financial Instruments link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - Fair Value Measurement link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - Balance Sheet Components link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - Borrowings link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - Stockholders’ Equity link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - Net Income (Loss) Per Share Attributable to Upstart Holdings, Inc. Common Stockholders link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - Reorganization Expenses link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - Description of Business and Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - Variable Interest Entities (Tables) link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - Fair Value Measurement (Tables) link:presentationLink link:calculationLink link:definitionLink 0000026 - Disclosure - Goodwill and Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 0000027 - Disclosure - Balance Sheet Components (Tables) link:presentationLink link:calculationLink link:definitionLink 0000028 - Disclosure - Borrowings (Tables) link:presentationLink link:calculationLink link:definitionLink 0000029 - Disclosure - Stockholders’ Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 0000030 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 0000031 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 0000032 - Disclosure - Net Income (Loss) Per Share Attributable to Upstart Holdings, Inc. Common Stockholders (Tables) link:presentationLink link:calculationLink link:definitionLink 0000033 - Disclosure - Revenue - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 0000034 - Disclosure - Revenue - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000035 - Disclosure - Revenue - Loan Servicing Rights (Details) link:presentationLink link:calculationLink link:definitionLink 0000036 - Disclosure - Revenue - Fees Collected (Details) link:presentationLink link:calculationLink link:definitionLink 0000037 - Disclosure - Revenue - Interest Income and Fair Value Adjustments (Details) link:presentationLink link:calculationLink link:definitionLink 0000038 - Disclosure - Variable Interest Entities - Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 0000039 - Disclosure - Variable Interest Entities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000040 - Disclosure - Derivative Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 0000041 - Disclosure - Fair Value Measurement - Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 0000042 - Disclosure - Fair Value Measurement - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000043 - Disclosure - Fair Value Measurement - Significant Inputs and Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 0000044 - Disclosure - Fair Value Measurement - Sensitivity of Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 0000045 - Disclosure - Fair Value Measurement - Loans Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 0000046 - Disclosure - Fair Value Measurement - Loans at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 0000047 - Disclosure - Fair Value Measurement - Note Receivable Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 0000048 - Disclosure - Fair Value Measurement - Fair Value Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 0000049 - Disclosure - Fair Value Measurement - Loan Servicing Sensitivity (Details) link:presentationLink link:calculationLink link:definitionLink 0000050 - Disclosure - Fair Value Measurement - Loan Servicing Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 0000051 - Disclosure - Fair Value Measurement - Trailing Fee Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 0000052 - Disclosure - Goodwill and Intangible Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000053 - Disclosure - Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000054 - Disclosure - Goodwill and Intangible Assets - Future Expected Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 0000055 - Disclosure - Balance Sheet Components - Other Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000056 - Disclosure - Balance Sheet Components - Property Plant and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 0000057 - Disclosure - Balance Sheet Components - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000058 - Disclosure - Balance Sheet Components - Accrued Expenses and Other Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 0000059 - Disclosure - Borrowings - Schedule of aggregate principal outstanding of all loans (Details) link:presentationLink link:calculationLink link:definitionLink 0000060 - Disclosure - Borrowings - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000061 - Disclosure - Borrowings - Assets Pledged as Collateral (Details) link:presentationLink link:calculationLink link:definitionLink 0000062 - Disclosure - Borrowings - Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 0000063 - Disclosure - Stockholders’ Equity - Reserved Shares of Common Stock for Issuance (Details) link:presentationLink link:calculationLink link:definitionLink 0000064 - Disclosure - Stockholders’ Equity - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000065 - Disclosure - Stockholders’ Equity - Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000066 - Disclosure - Stockholders’ Equity - RSU Activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000067 - Disclosure - Stockholders’ Equity - Restricted Stock Activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000068 - Disclosure - Stockholders’ Equity - Weighted-Average Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 0000069 - Disclosure - Stockholders’ Equity - Expense (Details) link:presentationLink link:calculationLink link:definitionLink 0000070 - Disclosure - Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000071 - Disclosure - Leases - Lease Liability Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 0000071 - Disclosure - Leases - Lease Liability Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 0000072 - Disclosure - Leases - Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 0000073 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 0000074 - Disclosure - Income Taxes - Effective Tax Rates (Details) link:presentationLink link:calculationLink link:definitionLink 0000075 - Disclosure - Net Income (Loss) Per Share Attributable to Upstart Holdings, Inc. Common Stockholders - Calculation (Details) link:presentationLink link:calculationLink link:definitionLink 0000076 - Disclosure - Net Income (Loss) Per Share Attributable to Upstart Holdings, Inc. Common Stockholders - Antidilutive Securities (Details) link:presentationLink link:calculationLink link:definitionLink 0000077 - Disclosure - Reorganization Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 0000078 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink