QSBS Section 1202: How Founders Exclude $10M+ in Capital Gains Tax-Free

Few provisions in the Internal Revenue Code rival the power of Section 1202. If you hold Qualified Small Business Stock (QSBS) for more than five years, you can exclude up to $10 million — or 10 times your basis, whichever is greater — from federal capital gains tax entirely. For founders and early investors in successful startups, this is often the single largest tax strategy of a lifetime.

The Five Requirements for QSBS Eligibility

QSBS treatment under Section 1202 requires all five of the following conditions to be met:

1. Domestic C-Corporation Status. The issuing company must be a domestic C-corporation at all times from issuance through sale. S-corporations, LLCs, and partnerships do not qualify. A common pitfall: founders who incorporate as an LLC and convert to C-corp later may forfeit the holding period start date.

2. Original Issuance. You must acquire the stock directly from the company in exchange for cash, property, or services — not on the secondary market.

3. Active Business Requirement. At least 80% of the company's assets must be used in the active conduct of a qualified trade or business. Excluded businesses include health, law, engineering, financial services, hospitality, farming, and any business where the principal asset is the reputation or skill of one or more employees.

4. Gross Asset Test. The company's aggregate gross assets must not exceed $50 million at any time before or immediately after the stock is issued. This is measured using tax basis, not fair market value.

5. Five-Year Holding Period. The stock must be held for more than five years from the date of issuance.

The Exclusion Math

For QSBS issued after September 27, 2010, the exclusion is 100% federal — no capital gains tax, no AMT, no NIIT (Section 1411 net investment income tax). The cap is the greater of:

• $10 million per issuer (lifetime), or

• 10 times the aggregate adjusted basis of the QSBS sold during the year.

For a founder with $100,000 in basis, the second prong allows up to $1 million of exclusion. For a founder with $1 million in basis (perhaps from converted notes or service contributions), the second prong allows up to $10 million — matching the first cap.

The Section 1045 Rollover

If you've held QSBS for at least six months but less than five years, Section 1045 allows a tax-free rollover into replacement QSBS within 60 days of sale. This preserves the original holding period — meaning a founder who sells too early can roll proceeds into a new qualifying investment and still hit the five-year mark.

State Conformity Matters

Not every state conforms to Section 1202. California notably does not — California residents pay full state capital gains tax even on QSBS-excluded federal gains. Pennsylvania, Mississippi, New Jersey, and Alabama also have non-conforming or limited treatment. For founders nearing a liquidity event, state-of-residence planning can be worth millions.

Stacking and Multiplying the Exclusion

Sophisticated planning multiplies the $10M cap through:

• Gifting QSBS to family members — each recipient gets their own $10M exclusion.

• Non-grantor trusts — properly structured trusts in QSBS-friendly states can each claim the full exclusion, often called "QSBS stacking."

• Timing of issuances — separate stock issuances may qualify as separate exclusions in some interpretations.

Common Mistakes That Disqualify QSBS

• Starting as an LLC and converting later (resets the holding clock at FMV).

• Stock buybacks within two years before or after issuance can taint nearby issuances under the "redemption rules."

• Triggering the $50M gross asset cap by raising too much capital before issuing additional shares.

• Operating in a disqualified field of business.

Why This Requires Top-Tier Planning

QSBS is not a checkbox at exit — it's an entity formation, capital structure, and trust planning exercise that begins on day one. By the time founders are negotiating an acquisition term sheet, most of the planning levers are gone. If you're a founder, early employee, or angel investor, get this analyzed before your next equity event.