Embed the Capital Gains Tax Calculator

Federal tax on a sale, with the long-term rate stacked on top of your other income the way the law does it — and the 3.8% surtax most calculators forget. Set the values it should open on, then copy the iframe. Your visitors can change them; the widget recomputes against Rule Calculator and never touches your page.

Opening values

Set what the widget shows before anyone touches it. Leave a field as it is and it stays out of the URL.

What you paidWhat you sold forHow long you held itFiling statusTaxable income before this gainHeight — 1100px

Preview

Paste this

<iframe src="https://rulecalculators.com/embed/capital-gains-tax" width="100%" height="1100" style="border:1px solid #e5e5e5;border-radius:12px" loading="lazy" title="Capital Gains Tax Calculator"></iframe>
<p style="font:13px/1.5 system-ui,sans-serif;color:#666;margin:6px 0 0"><a href="https://rulecalculators.com/calc/capital-gains-tax" style="color:#666">Capital Gains Tax Calculator</a> by <a href="https://rulecalculators.com" style="color:#666">Rule Calculator</a></p>

Free for commercial use. The one condition is the credit link inside the widget, which is how the calculator stays free. Want the numbers in your own markup instead? The same calculator is a JSON endpoint, or see the full Capital Gains Tax Calculator page with its sources and working.