Professional-grade tax calculators built on official IRS data. Transparent formulas, cited sources, zero cost.
Estimate your federal income tax, effective and marginal rate, and tak...
Work out self-employment tax with the Social Security and Medicare bre...
Estimate your federal tax refund or balance due before you file.
Each tool is updated for the 2026 tax year and cites its data sources.
Estimate your federal income tax, effective and marginal rate, and take-home pay.
Calculate →Find your marginal and effective tax rate and see every bracket.
Calculate →Estimate your federal tax refund or balance due before you file.
Calculate →Estimate the right paycheck withholding for your W-4.
Calculate →Compare take-home pay as a 1099 contractor vs a W-2 employee.
Calculate →Compute quarterly estimated tax payments and their due dates.
Calculate →Work out self-employment tax with the Social Security and Medicare breakdown.
Calculate →Same $7,000, same growth, wildly different outcomes — Traditional and Roth IRAs only diverge when your tax rat...
Whether a retirement account saves you tax now or later depends on which type you pick — here is how 401(k)s,...
"\"I'm in the 24% bracket\" is almost always either wrong or misunderstood. Here is how to find the bracket yo...
A married couple expected a $3,000 refund and owed $1,900 instead. The number was knowable in October. Here is...
You filed and the money still has not landed. Here is the realistic 2026 timeline, what the tracker stages act...
A practical 2026 walkthrough of the IRS Form W-4 — filing status, the multiple-jobs step people skip, dependen...
SmartTaxCalcs provides free, transparent tax calculators for U.S. taxpayers. Every tool shows its formula and cites its sources — federal brackets from IRS Revenue Procedures, state rates from each state's Department of Revenue, FICA from the Social Security Administration.
Disclaimer: SmartTaxCalcs provides estimates for informational and educational purposes only and does not provide tax advice. Consult a qualified tax professional before making decisions.
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