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 bonusFree Earned Income Credit Calculator 2026
Estimate your Earned Income Tax Credit (EITC) for 2026 based on earned income, filing status, and qualifying children. See eligibility, credit amount, and phase-in/phase-out details.
Calculate your earned income creditEstimated Quarterly Tax Calculator 2026
Estimate your 2026 federal quarterly tax payments based on income, deductions, and withholding — with safe harbor amounts and IRS due dates.
Calculate your quarterly tax paymentsRoth IRA Conversion Tax Calculator 2026
Estimate the federal and state tax cost of converting a traditional IRA to a Roth IRA and find the optimal amount to convert before jumping to the next bracket.
Calculate your Roth conversion taxIRS Underpayment Penalty Calculator 2026
Estimate your IRS underpayment penalty for not paying enough federal tax through withholding or quarterly estimated payments.
Estimate your penaltyHSA Tax Savings Calculator 2026
Estimate your federal, state, and FICA tax savings from Health Savings Account contributions with 2026 limits, catch-up eligibility, and employer contribution tracking.
Calculate your HSA tax savings401(k) Early Withdrawal Penalty Calculator 2026
Estimate the 10% IRS penalty, federal income tax, and state income tax on an early 401(k) withdrawal to see how much you actually keep after cashing out.
Calculate your withdrawal costSocial Security Tax Calculator 2026
Calculate your 2026 Social Security tax, Medicare tax, and Additional Medicare Tax with the $184,500 wage base cap.
Calculate your Social Security taxBonus Tax Calculator 2026
Calculate take-home pay on a bonus using the IRS percentage method (flat 22% / 37% over $1M) or aggregate method, plus Social Security, Medicare, and state withholding for 2026.
Calculate your bonus take-homeNo Tax on Overtime Calculator 2026 (OBBBA)
Estimate your federal income tax savings under the OBBBA qualified overtime deduction — up to $12,500 single / $25,000 joint of the FLSA overtime premium, with MAGI phase-out at $150K / $300K.
Calculate overtime tax savingsNo Tax on Tips Calculator 2026 (OBBBA)
Estimate 2026 federal tax savings from the OBBBA No Tax on Tips deduction, including the $25,000 cap, MAGI phase-out, and FICA impact.
Calculate my tip tax savingsSenior Bonus Deduction Calculator
Estimate your OBBBA senior bonus deduction up to $6,000 per filer age 65+ ($12,000 joint), with phase-out above $75k/$150k MAGI.
Calculate your senior deductionQBI Deduction Calculator 2026
Estimate your 2026 QBI deduction under Section 199A, including the 20% pass-through rate, phase-in range, wage limits, SSTB rules, and $400 minimum.
Calculate your QBI deductionChild and Dependent Care Credit Calculator 2026
Estimate your 2026 Child and Dependent Care Credit under the OBBBA enhancement — 20% to 50% of up to $3,000 (one dependent) or $6,000 (two or more) in qualifying care expenses.
Calculate your care creditFree Tax Refund Estimator 2026
Project your 2026 federal tax refund from W-2 wages, withholding, dependents, and deductions using the latest IRS brackets and Child Tax Credit rules.
Estimate your refundAdoption Tax Credit Calculator 2026
Estimate your 2026 federal Adoption Tax Credit under the OBBBA enhancement — up to $17,670 per child, with up to $5,120 refundable. Models qualified expenses, MAGI phase-out, special-needs adoptions, and the 5-year carryforward.
Calculate your adoption creditDependent Care FSA vs. Credit Calculator 2026
Compare the 2026 Dependent Care FSA ($7,500 limit) against the 20%-50% Child and Dependent Care Credit and find the optimal split between the two under the OBBBA.
Compare FSA vs. creditTraditional IRA Deduction Calculator 2026
See how much of your 2026 traditional IRA contribution is tax-deductible based on MAGI, filing status, and workplace plan coverage — with the deductible amount, nondeductible portion, and federal tax savings in seconds.
Calculate your IRA deductionNeed 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.