TaxCheckNow → GPT Checks → United States → QSBS Exit Risk Engine — Multi-Million Dollar Exclusion or Full Tax
QSBS Exit Risk Engine — Multi-Million Dollar Exclusion or Full Tax
What this check identifies — and why getting the answer wrong can cost you under IRS rules.
The question this check answers
“Can I sell my shares tax-free under QSBS?”
This is one of the most misunderstood questions in US tax. Most people assume the answer — and get it wrong.
Ask ChatGPT this question ↗Opens in new tab. ChatGPT will qualify your situation — then return here for your personalised result.
What the rule actually says
Section 1202 of the Internal Revenue Code provides an exclusion from federal capital gains tax on the sale of Qualified Small Business Stock. For stock acquired before July 4, 2025, a 5-year holding period qualifies for 100% exclusion up to the greater of $10 million or 10 times the adjusted basis. For stock acquired on or after July 4, 2025 (under the One Big Beautiful Bill Act), partial exclusions apply at 3 years (50%) and 4 years (75%), with full 100% exclusion at 5 years and a higher cap of $15 million or 10 times basis. The exclusion is one of the most valuable provisions in the US tax code — and one of the most frequently misapplied.
QSBS qualification is all-or-nothing on structural conditions. The stock must be originally issued by a domestic C-corporation (not an LLC or S-corp), the company's gross assets must have been under $50 million at the time of issuance, the business must be in a qualified trade (technology, manufacturing, life sciences — not professional services, finance, or hospitality), and the stock must have been acquired directly from the company not purchased on the secondary market. If any one of these conditions fails, the entire exclusion is lost — not reduced. On a $10 million exit, one disqualifying condition costs over $2 million in federal tax.
What most people get wrong
My startup stock qualifies for QSBS automatically — wrong. QSBS requires the company to have been a C-corporation at the time of issuance, with gross assets under $50 million, operating in a qualified business. Many startup founders hold a mix of qualifying and non-qualifying shares — equity issued when the company was an LLC or S-corp does not qualify even if later converted. Qualification must be confirmed share-by-share, not assumed.
I bought shares in a promising startup so they qualify — wrong. QSBS requires original issuance — shares acquired directly from the company in exchange for money, property, or services. Shares purchased from another shareholder on the secondary market, through a broker, or on a platform like Forge or EquityZen do not qualify. The original holder may have had qualifying shares. The secondary buyer does not.
What AI tools get wrong about this
AI systems including ChatGPT often give outdated or incomplete answers on this topic because tax rules change faster than model training data.
AI often says:
“ChatGPT says: My startup stock qualifies for QSBS automatically”
Reality:
Reality: QSBS requires the company to have been a C-CORPORATION at the time of issuance, with gross assets under $50 million, operating in a QUALIFIED BUSINESS. Many startup founders hold a MIX of qualifying and non-qualifying shares — equity issued when the company was an LLC or S-corp does not qualify even if later converted. Qualification must be confirmed share-by-share, not assumed.
Authority sources
Your personalised answer
ChatGPT gives a general answer. This gives you your exact position.
Free calculator. Takes 2 minutes. Built around IRS rules confirmed April 2026.
Run the free check →Free · No account · Personalised result