Federal income tax, FICA, capital gains, deduction and retirement-limit estimates from IRS published figures.
payments ON MAINNET (real money) · 8 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /bracket-lookup | $0.02 | Which US federal income tax bracket a taxable income falls in: marginal rate, bracket edges and dollars to the next bracket. |
GET /capital-gains-tax | $0.03 | US long-term capital gains tax: 0/15/20 percent stacked on ordinary taxable income, plus 3.8 percent net investment income tax. |
GET /income-tax-estimate | $0.03 | US federal income tax estimate by filing status and year, with bracket breakdown and marginal and effective rates. |
GET /payroll-tax | $0.03 | US FICA tax on wages (Social Security, Medicare, Additional Medicare) with the employer split, and self-employment tax. |
GET /retirement-limits | $0.02 | IRS retirement and HSA contribution limits by year: 401(k), IRA, catch-up, SIMPLE, HSA, with an age-adjusted personal limit. |
GET /standard-deduction | $0.02 | US federal standard deduction by filing status and tax year, with age 65 or blind add-ons and the dependent filer limit. |
GET /tax-years | $0.02 | Which US tax years and IRS figures this shelf bundles, with source documents, data date and a staleness warning. |
GET /withholding-estimate | $0.03 | Annual and per-paycheck take-home from salary: federal withholding (IRS percentage method) plus FICA. State tax not included. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Federal-only educational estimates from IRS published figures for the bundled tax years. Not tax advice; ignores credits, AMT, state tax and many deductions. Figures must be refreshed every year. Every paid response carries a disclaimer field.