QSBS (Section 1202 / Qualified Small Business Stock)
A federal tax exclusion under IRC Section 1202 allowing eligible shareholders to exclude up to $10 million (or 10x invested basis) of capital gains from federal taxation on the sale of qualified small business stock held for more than five years.
Full Definition
QSBS is one of the most powerful tax benefits available to founders and early investors in small businesses — and one of the most underutilized because it requires deliberate structuring before a company grows past eligibility thresholds. For a founder who qualifies, QSBS can mean paying zero federal tax on $10M+ of capital gains at exit. On a $25M exit for a zero-basis founder, that's $2.4M of tax savings versus standard long-term capital gains treatment.
How it actually works: QSBS eligibility requirements: (1) Entity type — must be a domestic C corporation at issuance (not S-corp, not LLC); (2) Size at issuance — company's aggregate gross assets must be under $50M at time of stock issuance (including proceeds from the qualifying stock offering); (3) Active business — must be engaged in a "qualified trade or business" (excludes professional services like law, health, finance, hospitality, and several other enumerated exclusions); (4) Original issuance — stock must be acquired at original issuance directly from the company, not in a secondary market transaction; (5) Holding period — must hold for more than 5 years; (6) Shareholder type — non-corporate shareholders only (individuals, certain trusts and partnerships).
Exclusion amount: the greater of $10M per shareholder or 10x the adjusted basis of the stock. Federal exclusion is 100% for stock acquired after September 27, 2010 (under current law, subject to Congressional changes). California and a handful of other states do not conform to the federal exclusion — state tax may still apply.
Stack considerations: each shareholder gets their own $10M exclusion, so founder, co-founders, early employees, and investors can each exclude $10M. A company with 5 qualifying shareholders could collectively exclude $50M of gains. Some practitioners stack QSBS through partnerships or funds to multiply the exclusion.
Seller vs. Buyer Perspective
QSBS planning must happen early — ideally at formation or first equity round. Check eligibility now: (1) Are you a C-corp? (If you're an LLC or S-corp, you'll need to convert, which resets the holding clock); (2) Was gross assets under $50M when your shares were issued? (3) Is your business in a qualified industry? If you pass these, and you're past the 5-year holding period, your gain may be excluded up to $10M per shareholder. Common planning moves: (1) convert to C-corp early if eligible; (2) issue shares at formation (lowest basis, maximum gain exclusion); (3) gift shares to family members (each gets their own $10M limit); (4) don't wait until pre-sale to check — by then it's too late.
QSBS doesn't directly affect deal structure from the buyer's side, but seller awareness of QSBS affects deal dynamics. Sellers with QSBS often have less tax urgency on deal structure — they don't need installment treatment, 338(h)(10) elections, or other seller-favorable tax mechanisms when gains are fully excluded. This can simplify negotiations. Also: be aware sellers holding QSBS-qualifying stock strongly prefer stock sales (to preserve QSBS exclusion); asset sales don't preserve QSBS.
Real-World Example
A founder forms a C-corp software tools business in 2018, issues shares to herself at $0.001/share ($1,000 total basis for 1,000,000 shares). Company grows to $8M EBITDA. In 2025, she receives a $40M acquisition offer (7 years of holding — past the 5-year requirement). Gross assets were under $50M when shares were issued. Business is in software (qualified business). Exclusion calculation: gain on $40M sale = ~$40M (near-zero basis). Per-shareholder exclusion: greater of $10M or 10x basis ($10K) = $10M. Federal tax on the $10M excluded: $0. Tax on remaining $30M gain at 23.8% (20% LTCG + 3.8% NIIT): ~$7.14M. Total federal tax: $7.14M. Without QSBS, full $40M gain taxed at 23.8%: ~$9.52M. QSBS saved $2.38M of federal tax. State note: in California, zero QSBS conformity — full $40M taxable at 13.3% state rate ($5.32M) regardless of federal exclusion.
Why It Matters & Common Pitfalls
- !Must be C-corp at issuance. LLC and S-corp don't qualify. Conversions reset the 5-year clock.
- !Excluded industries. Professional services (law, health, finance, consulting, brokerage, performing arts, athletics) are excluded from QSBS treatment. Many SMB service businesses don't qualify.
- !$50M gross assets ceiling. If the company was over $50M in assets when your specific shares were issued, those shares don't qualify even if later shares do.
- !State non-conformity. California, Massachusetts, and a few others don't recognize the federal exclusion. Major impact for founders in those states.
- !Legislative risk. QSBS exclusion has been proposed for reduction/modification several times. Current 100% exclusion (post-2010 shares) could change.
- !Five-year holding period. Hard deadline. Even one day short doesn't qualify.
- !Stacking through funds. Partnership and fund stacking to multiply exclusions is complex and contested — get specialized advice.
Frequently Asked Questions
What is QSBS (Section 1202)?↓
Who qualifies for QSBS exclusion?↓
How much tax can QSBS save?↓
Does QSBS apply to LLC businesses?↓
Related Terms
Capital Gains (Short vs Long Term)
The tax treatment of gain from selling a capital asset (like a business). Long-term capital gains (asset held >1 year) are taxed at preferential federal rates (typically 20%); short-term gains and ordinary income can be taxed at up to 37%.
F Reorganization
A tax-free reorganization under IRC Section 368(a)(1)(F) that restructures an S-corporation into a new holding company — often used to give buyers a stepped-up tax basis while preserving stock-sale treatment for the seller.
Stock Sale
A transaction in which the buyer purchases the stock (or equity interests) of the target company, acquiring the entity itself along with all its assets and liabilities — contrast with an asset sale.
Asset Sale
A transaction in which the buyer purchases specific assets and assumes specific liabilities of a business, while the seller retains the legal entity — contrast with a stock sale, where the entity itself changes hands.
Installment Sale
A sale where the seller receives payments over multiple years and — if elected — recognizes the taxable gain ratably as payments are received rather than all in the year of sale. Available for seller notes and earnouts in most circumstances.
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Disclaimer: The information provided on this page is for educational and informational purposes only. It should not be considered financial, legal, or investment advice. Business valuations depend on many factors specific to each situation. Always consult with qualified professionals — including business brokers, CPAs, and M&A attorneys — before making acquisition or sale decisions. LegacyVector is not a licensed broker, financial advisor, or attorney. Data shown may be based on limited samples and may not reflect current market conditions.
LegacyVector Research Team
Reviewed by M&A professionals · Updated April 2026