Config-driven calculator

Paycheck & Income Tax Estimator

Estimate federal income tax, payroll taxes, and take-home pay using baseline US tax brackets.

This first production-ready pass models US federal income tax and FICA conventions with versioned 2026 bracket and deduction data.

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How It Works

How this calculator helps answer the decision.

This first production-ready pass models US federal income tax and FICA conventions with versioned 2026 bracket and deduction data.

Gross Annual Income: Your annual wages before taxes or paycheck deductions.
Federal Pre-tax Deductions: Annual deductions that reduce federal taxable income, such as traditional 401(k) contributions. Payroll taxes are still estimated on gross wages.
Filing Status: Choose the federal filing status that controls the standard deduction and bracket thresholds.
Pay Frequency: Select how often you are paid to convert annual net pay into each paycheck.

Federal taxable income: Gross wages minus selected federal pre-tax deductions and the standard deduction.
Federal income tax: Progressive federal income tax generated from the selected standard deduction and bracket schedule.
Social Security tax: Employee-side Social Security withholding up to the current wage base.
Medicare tax: Employee Medicare withholding, including additional Medicare tax once wages exceed the selected threshold.