What this means
Start with the tax year and your profile
This calculator supports ordinary 2025 wages from one employer for a single U.S. resident employee under 65 who is not blind or a dependent. It uses the standard deduction and excludes credits and special deductions. Other profiles and tax years are unsupported.
A higher bracket does not tax all your pay at that rate
Federal income tax is progressive. Only the income inside each bracket is taxed at that bracket’s rate. The model also deducts employee Social Security up to its wage cap and Medicare on all supported wages.
Leave room for what this estimate excludes
State and local taxes, insurance, retirement contributions, credits, and special deductions can change actual pay. The annual federal estimate is divided by 12; it does not reproduce an employer’s withholding schedule or replace a tax return.
Good questions
Can I calculate Korean taxes or 2026 U.S. taxes?
No. Those jurisdictions or years are unsupported until verified rules are implemented and maintained. Selecting Korean as the language does not change the tax rules.
Why is the wage range capped at 200,000 USD?
This keeps the MVP within its narrow ordinary-wage profile. Higher wages and more complex situations require additional tax rules. Even within the range, credits and special deductions are excluded.