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x402toll Federal Income Tax Calculator 2026
x402
x402toll Federal Income Tax Calculator 2026 is a paid API for AI agents from x402toll.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Calculates 2026 US federal income tax liability from gross income, above-the-line adjustments, standard or itemized deductions, filing status, and a flat nonrefundable credit amount
Price / call$0.05
Success—
StatusUnknown
How this service works
Federal income tax on ordinary income for 2026: AGI from gross minus above-the-line adjustments, standard or itemized deduction, the 2026 brackets, and a flat nonrefundable credit amount. Distinct from /v1/paycheck (which nets FICA + state per pay period).
Output
Returns the computed 2026 federal income tax: AGI (gross minus adjustments), taxable income after standard or itemized deduction, tax calculated using 2026 brackets, and final tax owed after applying the flat nonrefundable credit amount.
Example use cases
Example prompt
“What will my 2026 federal income tax be if my gross income is $120,000, I have $5,000 in above-the-line adjustments, I'm filing as single, I'll take the standard deduction, and I have $500 in nonrefundable credits?”
Technical details
Endpoint
POSThttps://x402toll.com/v1/tax/federal-incomeWhen to prefer
Use this endpoint when you need a pure federal income tax computation for 2026 using the official tax brackets, AGI methodology, and a nonrefundable credit offset — particularly when you need to isolate federal income tax from payroll taxes (FICA) or state taxes. Prefer this over /v1/paycheck when computing annual tax liability rather than per-paycheck net pay.
Side effects
- grossIncome below 0 or above 1,000,000,000 — validation error
- invalid filingStatus value other than 'single' or 'mfj' — enum validation error
- itemizedDeductions provided but deductionType set to 'standard' — may silently ignore itemized amount
- missing required grossIncome field — request rejected
- credits or adjustments as non-numeric types — schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| credits | number | |
| adjustments | number | |
| grossIncome | number | |
| filingStatus | string | |
| deductionType | string | |
| itemizedDeductions | number |
Tags
x402
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