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x402toll Self-Employment Tax Calculator
x402
x402toll Self-Employment Tax Calculator 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 US self-employment tax on Schedule C net profit, including Social Security (up to 2026 $184,500 wage base), Medicare, Additional Medicare, and the deductible half
Price / call$0.05
Success—
StatusUnknown
How this service works
Self-employment (SE) tax on Schedule C net profit — Social Security to the 2026 $184,500 wage base, Medicare, Additional Medicare, and the deductible half.
Output
Returns a breakdown of self-employment tax components: Social Security tax (capped at 2026 $184,500 wage base net of any W-2 wages), Medicare tax (2.9% flat), Additional Medicare surtax (0.9% above threshold), total SE tax, and the deductible half of SE tax for Form 1040 above-the-line deduction
Example use cases
Example prompt
“What's my self-employment tax on $95,000 net profit filing as single with no W-2 wages this year — break down Social Security, Medicare, Additional Medicare, and how much I can deduct?”
Technical details
Endpoint
POSThttps://x402toll.com/v1/tax/self-employmentWhen to prefer
Use this endpoint when you need a precise, 2026-current self-employment tax breakdown for a Schedule C filer, especially when the user has W-2 wages that offset the Social Security wage base or needs the deductible half for AGI calculation. Prefer over generic tax APIs when SE-specific detail (wage base offset, deductible half) is required.
Side effects
- Missing or invalid netProfit field returns validation error
- Invalid filingStatus enum value rejected
- Negative netProfit may return zero SE tax or error depending on implementation
- Very large netProfit may trigger edge-case rounding differences
- w2SocialSecurityWages exceeding wage base correctly zeroes out SS portion
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| netProfit | number | |
| filingStatus | string | |
| w2SocialSecurityWages | number |
Tags
x402
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