Tax calculators
Free federal tax calculators built on IRS rate schedules. No account needed, and nothing you type leaves your browser.
Tax bracket calculator
Find your federal income tax bracket, marginal rate and effective rate for 2026, with a bracket-by-bracket breakdown for all four filing statuses.
Based on IRS Rev. Proc. 2025-32
Open calculatorTax refund estimator
Enter your income, withholding and credits to see whether you'll likely get a refund or owe, and roughly how much.
Based on 2026 IRS tax rate schedules
Estimate your refundIRS penalty calculator
Estimate failure-to-file and failure-to-pay penalties under IRC § 6651, plus underpayment interest, before you contact the IRS.
Based on IRC § 6651 and the IRS underpayment rate
Calculate penaltiesThese are estimates. The calculators cover federal income tax only and leave out things like self-employment tax, AMT and state tax. For advice on your own return, talk to a CPA or enrolled agent.