QSBS and Section 1202: The $10 Million Tax Break Most Founders Forget About

Section 1202 can eliminate federal capital-gains tax on the first $10 million of gain when you sell your company stock, or ten times your basis if larger. Founders miss it for structural reasons: the wrong entity at issuance, a clock that started later than they think, or a state that does not conform.

The Basic Eligibility Box You Have to Check First

The exclusion applies to Qualified Small Business Stock, and every word matters. To qualify:

• The issuing company must be a domestic C-corporation at the time of issuance.
• The corporation's aggregate gross assets cannot have exceeded $50 million when your stock was issued (and immediately after).
• You must have acquired the stock at original issuance, not on the secondary market.
• You must hold the shares more than five years before selling.

That five-year clock is the most common source of grief. Converting from an LLC to a C-corp resets it; an early buyout at year four gets nothing. The clock starts at issuance, not when the company was founded.

Service businesses, professional firms, financial companies, and hospitality are statutorily excluded regardless of size. Technology, life sciences, and most product companies typically qualify, but confirm with tax counsel.

What the Exclusion Actually Gives You (and How to Stack It)

Check every box and you exclude 100% of the gain federally, subject to a cap: the greater of $10 million or ten times the adjusted basis of the stock. For someone who invested $500,000 at founding, the ten-times multiplier gives $5 million, so the $10 million floor usually governs.

The underused move is stacking. Because the exclusion applies per taxpayer, transferring shares to trusts or family members before an exit can multiply it. A founder who gifts QSBS into three separate irrevocable trusts may effectively shelter $40 million in gain, not $10 million. The transfers must happen before a sale is imminent. This is Soil-layer work.

The California Problem

California does not conform to Section 1202. The state taxes the full gain at ordinary income rates, which currently top out near 13.3%. A $10 million federal exclusion that saves you roughly $2.38 million in federal tax saves you nothing in Sacramento. Founders often weigh a domicile change, but the bar for non-residency is high and the FTB scrutinizes it. New York and Massachusetts have partial or full conformity.

The Takeaway

The fact that decides your outcome is the original issuance date on your cap table, not the size of the offer. If your five-year mark is 14 months out, that one number reorders every other decision in the exit.

The founders who get hurt here are usually the ones who qualified. They cleared every test, held past five years, then closed without moving any shares into trusts, capping a much larger gain at one $10 million exclusion while living in a state that conformed to none of it.

Which shares qualify, what stacking is still open, and what your state does with the rest is worth a conversation before you respond to acquisition interest.

The information provided is for educational purposes only and does not constitute investment, legal, or tax advice. Consult with qualified professionals for guidance specific to your situation.