QSBS Calculator — Section 1202 Gain Exclusion
Estimate your potential QSBS gain exclusion under Section 1202 — up to $10M (or 10x basis) of tax-free gain at a qualifying exit.
QSBS exclusion estimator
Federal §1202 only. Assumes the stock already qualifies (C-corp, qualified trade, gross-assets test met).
Enter your gain, basis, and holding period to estimate how much §1202 can exclude.
Estimate only, federal §1202 exclusion. Does not check eligibility (qualified trade, C-corp status, gross-assets ceiling) and does not include state tax — California, Pennsylvania and others do not conform and tax the gain in full. Confirm with your CPA.
Want the full mechanics, edge cases, and 2026 rules behind this tool?
Read the full guide: QSBS After the 2025 Overhaul: The Founder's Guide to Section 1202 (2026)→This tool gives an estimate for planning only — not tax advice. Acorn 9 is a tax & accounting firm built for startups; the actual numbers on your return are prepared and signed by a licensed CPA. See all tools.