About us

capitalgaintaxcalc.com is a free educational calculator that helps investors estimate US federal and state capital gains tax for stocks, crypto, real estate, collectibles, and business / QSBS scenarios.

We focus on mathematical transparency, cited IRS and state sources, and fast static pages on Cloudflare’s global CDN. Estimates are not tax advice — always confirm with a licensed CPA before filing.

Accuracy standards

Federal brackets and NIIT thresholds follow published IRS revenue procedures (including Rev. Proc. 2025-32 for 2026 amounts). Each state page links to an official revenue source. Ourmethodologypage documents the eight calculation layers and known MVP limitations.

Independence

This site is an independent educational Micro-SaaS project. Affiliate relationships and future advertising never change the tax math shown in the calculator.

Questions? Use thecontact pageor emailhello@capitalgaintaxcalc.com.