NomadTaxCalc — US Capital Gains Estimator

Instantly estimate federal + state capital gains tax before you sell. Free, no signup.

NomadTaxCalc's Chrome extension estimates your U.S. capital gains tax in your browser's side panel. It covers federal tax, state tax, and the Net Investment Income Tax (NIIT). Enter what you paid, what you're selling for, and your state on an interactive map. You get a real number in under a minute. What it does: • Interactive state-by-state map with real tax rates • Compares short-term versus long-term holding periods, so you can see what waiting saves you • Shows the full federal bracket breakdown and the NIIT surtax No account. No sign-up. Your inputs go to our servers only to calculate the estimate. They aren't stored and aren't used for advertising. Free for the 2026 tax year. U.S. only for now.