Payroll & tax

Standalone 2026 state income tax for any of 51 US jurisdictions — progressive/flat/no-tax schedules, MFJ doubling — applied to the income you provide.

Standalone 2026 state income tax for any of 51 US jurisdictions — progressive/flat/no-tax schedules, MFJ doubling — applied to the income you provide.

Payment: x402 ($0.05 USDC on eip155:8453). Call unpaid to receive an HTTP 402 with requirements, then retry with the PAYMENT-SIGNATURE header. Method: tax = marginal state 2026 brackets (MFJ doubles single thresholds); no-tax states return $0

post/v1/tax/state-income

Request

  • Base URL: (relative, and it does not resolve against the document’s source URL)
  • URL: /v1/tax/state-income
  • Auth: none declared

Request body

statestring required

2-letter US state/DC code

incomenumber required
filingStatus'single' | 'mfj'

Response

Verified result + provenance (formula, sources, reproducible SHA-256 hash).

Changes

No recorded changes to this operation across all 1 revision of this API.