---
title: "Full 2026 tax estimate in one call: federal income tax + self-employment tax + employee FICA + state income tax, from wages, self-employment income, and other income — with the component breakdown, effective and marginal rates, and after-tax income."
method: POST
path: "/v1/reports/tax-estimate"
tags: ["Payroll & tax"]
---

# Full 2026 tax estimate in one call: federal income tax + self-employment tax + employee FICA + state income tax, from wages, self-employment income, and other income — with the component breakdown, effective and marginal rates, and after-tax income.

`POST /v1/reports/tax-estimate`

## Request

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

Full 2026 tax estimate in one call: federal income tax + self-employment tax + employee FICA + state income tax, from wages, self-employment income, and other income — with the component breakdown, effective and marginal rates, and after-tax income.

Payment: x402 ($1.00 USDC on eip155:8453). Call unpaid to receive an HTTP 402 with requirements, then retry with the PAYMENT-SIGNATURE header. Method: AGI = gross - adjustments - ½SE; federal on (AGI - deduction) minus credits; + SE tax; + employee FICA on wages; + state tax on gross ordinary income

## Request body

- object
  - `filingStatus` 'single' | 'mfj'
  - `wages` number
  - `selfEmploymentIncome` number
  - `otherOrdinaryIncome` number
  - `adjustments` number
  - `deductionType` 'standard' | 'itemized'
  - `itemizedDeductions` number
  - `credits` number
  - `state` string

## Response `200`

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

## Other responses

- `400`: Invalid input (no charge) — body echoes the JSON Schema.
- `402`: Payment required — PAYMENT-REQUIRED header carries the x402 accepts[] quote.

---

[API](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents.md) · [All operations](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents/llms.txt) · [OpenAPI document](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents/revisions/60cb70a3e1a5?raw)