QSBS: how founders and early employees sell stock tax-free
The short answer
Qualified Small Business Stock lets founders, early employees, and investors in a qualifying C-corporation exclude a large slice of gain on sale from federal income tax entirely — up to $15 million per issuer, per taxpayer (or 10x basis if greater) for stock issued after the 2025 law change, with older stock still under the prior $10 million cap. The catch is the holding period and the eligibility rules: you need stock in an eligible C-corp, acquired at original issuance, held long enough to earn full exclusion — and a long list of businesses (professional services, hospitality, finance) don't qualify at all.
Who this works for — and who it doesn't
Good fit
- Founders and early employees of a domestic C-corp in software, tech, manufacturing, or most product businesses
- Stock acquired directly from the company (not bought secondhand from another shareholder)
- Anyone planning an exit years out, where the holding period can be built in from day one
Not a fit
- Law firms, accounting firms, consultancies, medical practices, financial services, hotels, restaurants — excluded industries regardless of structure
- LLC or S-corp owners who never convert to a C-corp before issuance
- Anyone selling stock within the first few years of issuance with no ability to wait
How it works
- The company must be a domestic C-corp with aggregate gross assets under the statutory cap (raised to $75 million by the 2025 law for stock issued after the change) at the time of issuance.
- The stock must be acquired at original issuance — directly from the company for cash, property, or services, not purchased from another shareholder on a secondary market.
- Hold it long enough. Stock issued after July 4, 2025 phases in exclusion on a tiered schedule — roughly half after three years, more at four, full exclusion at five. Stock issued before that date still needs the full five-year hold for the (lower, $10 million) exclusion.
- At sale, the excluded gain is reported but backed out of federal taxable income — state treatment varies and some states don't conform.
- If you sell early, IRC §1045 lets you roll gain into new QSBS within 60 days and keep the original holding period running instead of losing the benefit outright.
A worked example
Priya was issued founder shares at incorporation with a basis of $50,000. Five-plus years later the company is acquired and her stake sells for $12,050,000.
Priya's federal tax on the sale
Illustrative only. Exact figures depend on the issuance date, whether the tiered post-2025 schedule or the older $10 million cap applies, and state conformity, which several high-tax states do not follow.
Common mistakes that blow the exclusion
- Operating as an LLC/S-corp for years, then converting to a C-corp too late to build the holding period before a near-term sale
- Buying stock from a departing co-founder or early investor instead of the company — that's not original issuance
- Letting the company's gross assets cross the statutory threshold around the time of issuance without checking the test first
- Missing the gifting/trust planning window that could have multiplied the exclusion across family members
Frequently asked questions
What businesses do not qualify for QSBS?
The statute excludes most personal-service businesses — law, accounting, consulting, health, financial services, and similar fields — along with hotels, restaurants, farming, mining, and a handful of other sectors. C-corp software, tech, manufacturing, and many product businesses typically qualify; check eligibility before you rely on it.
Does an S-corp or LLC qualify for QSBS?
No. QSBS only exists for stock issued directly by a domestic C-corporation. If your business is an LLC or S-corp today and you want QSBS treatment for a future exit, the conversion to C-corp status has to happen — and the five-year clock generally starts running from the conversion, not from when the business itself started.
Can I get more than one $15 million exclusion?
The exclusion is per taxpayer, per issuer. Gifting shares to a spouse, children, or a properly structured non-grantor trust before the exit — done early enough and correctly — can multiply the number of $15 million exclusions available against the same company's stock. This requires real advance planning, not a year-of-sale fix.
Building a company or holding early-stage stock?
We'll check whether your entity and industry actually qualify, confirm your clock is running, and flag the gifting/trust moves worth making years before any exit conversation.
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