Return the yearly self-employment tax bill for the USA (SE tax: Social Security, Medicare, additional Medicare, plus federal income tax), Türkiye (Bağ-Kur premium plus income tax), or KKTC (social security plus income tax after the personal allowance), with taxable income, quarterly payment, effective rate, and net income after tax. Tax years 2024 and 2025.
This page documents the HTTP endpoint POST /api/tools/self-employment-tax-calculator/execute. See the MCP reference →
Call it over REST
POST https://api.findutils.com/api/tools/self-employment-tax-calculator/execute · no API keys · 60 requests/min per IP
Execute — verified arguments
curl -X POST https://api.findutils.com/api/tools/self-employment-tax-calculator/execute \
-H "Content-Type: application/json" \
-d '{
"country": "usa",
"tax_year": "2025",
"gross_income": 100000,
"business_expenses": 20000,
"filing_status": "single"
}'Parameter schema for this endpoint
curl https://api.findutils.com/api/tools/self-employment-tax-calculatorInput schema
| Argument | Type | Required | Description |
|---|---|---|---|
| country | string (usa | turkey | kktc) | no | Tax system: usa, turkey, or kktc. Default: turkey. |
| tax_year | string (2024 | 2025) | no | Tax year. Default: 2025. |
| gross_income | number | yes | Gross self-employment income for the year. |
| business_expenses | number | no | Deductible business expenses. Default: 0. |
| filing_status | string (single | married_joint | married_separate | head_of_household) | no | USA only. Default: single. |
| other_income | number | no | USA only: other taxable income (W-2, interest). Default: 0. |
| use_standard_deduction | boolean | no | USA only: use the standard deduction. Default: true. |
| itemized_deductions | number | no | USA only: itemized deductions when not using the standard one; the larger of the two is applied. Default: 0. |
| bagkur_tier | string (minimum | custom) | no | Türkiye only: minimum declared base, or custom. Default: minimum. |
| bagkur_has_discount | boolean | no | Türkiye only: 5-point discount for regular payers (29.5% instead of 34.5%). Default: true. |
| custom_bagkur_base | number | no | Türkiye only: monthly declared base when bagkur_tier is custom; clamped to the legal range. |
Example arguments (verified)
{
"country": "usa",
"tax_year": "2025",
"gross_income": 100000,
"business_expenses": 20000,
"filing_status": "single"
}Also an MCP tool
Claude, Cursor, and any MCP client can call this tool as
findutils:self_employment_tax_calculator after one connect command.
Connect once
claude mcp add findutils --transport http https://mcp.findutils.com/More Finance tools
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