Free Federal Tax Tools
Tax bracket breakdowns, effective vs marginal rate calculators, and more — all free, no sign-up required.
Tax Bracket Calculator
See exactly how your income is taxed across federal brackets with effective and marginal rates.
Calculate your tax bracketsFree Capital Gains Tax Calculator 2026
Estimate your federal capital gains tax on stocks, real estate, and other assets with short-term and long-term rates plus the 3.8% NIIT.
Calculate your capital gains taxFree Child Tax Credit Calculator 2026
Estimate your Child Tax Credit (CTC), Additional Child Tax Credit (ACTC), and Credit for Other Dependents based on your income, filing status, and number of qualifying children.
Calculate your child tax creditSelf-Employment Tax Calculator 2026
Estimate your self-employment tax (Social Security + Medicare) on freelance, 1099, or business income with quarterly payment estimates.
Calculate your self-employment taxItemized vs Standard Deduction Calculator 2026
Compare your itemized deductions against the 2026 standard deduction to find which saves you more in federal taxes, with SALT cap, medical expense threshold, and charitable floor calculations built in.
Compare your deductions nowMarriage Tax Penalty Calculator 2026
Compare your federal tax as two single filers vs. married filing jointly to find out if marriage creates a tax penalty or bonus — and exactly how much.
Calculate your marriage penalty or bonusNeed More Than a Quick Calculation?
Tax Calculator US estimates your refund, compares tax years side-by-side, and covers federal + state taxes in one place.