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x402toll Bonus & Commission Tax Withholding Calculator
x402
x402toll Bonus & Commission Tax Withholding 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 federal supplemental-wage withholding (22% flat or 37% over $1M), FICA, and optional state tax on a bonus or commission to show net take-home pay.
Price / call$0.05
Success—
StatusUnknown
How this service works
Withholding and net take-home on a bonus/commission using the 2026 federal supplemental-wage rate (22% flat; 37% on cumulative supplemental wages over $1M), plus FICA and an optional state supplemental rate.
Output
Returns a breakdown of federal supplemental-wage withholding (22% flat or 37% for wages over $1M cumulative), Social Security and Medicare (FICA) withholding, state supplemental withholding if a rate was provided, and the final net take-home dollar amount after all deductions.
Example use cases
Example prompt
“I'm getting a $45,000 year-end bonus and I've already received $80,000 in supplemental wages this year — can you calculate my federal withholding, FICA, and net take-home, and also apply my state's 5% supplemental rate?”
Technical details
Endpoint
POSThttps://x402toll.com/v1/tax/bonusWhen to prefer
Use this endpoint when you need a quick, rule-based calculation of bonus or commission withholding using the IRS supplemental wage flat rate (22% / 37%) rather than the aggregate method. Ideal for payroll estimation, offer-letter modeling, or financial planning when the employee's regular wages are unknown. Prefer this over a full W-4 aggregate calculator when you only have the bonus amount and YTD supplemental wages.
Side effects
- bonusAmount exceeds maximum (1,000,000,000) — validation error
- bonusAmount is negative — validation error
- stateSupplementalRatePct outside valid percentage range — validation error
- Missing required bonusAmount field — 400 Bad Request
- Payment not included or insufficient — 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| bonusAmount | number | |
| ytdSupplementalWages | number | |
| subjectToSocialSecurity | boolean | |
| stateSupplementalRatePct | number |
Tags
x402
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