Section 1202 of the Internal Revenue Code allows a taxpayer to exclude up to 100% of the gain from the sale of Qualified Small Business Stock (QSBS), subject to important limitations. The most critical limitation is the holding period: you must hold the stock for more than five years to qualify for the full exclusion. However, there is an exception that allows a partial exclusion after only three years. This article explains both paths, how they interact with your tax situation, and what "qualified" actually means under current law.
The five-year rule: full exclusion
If you hold QSBS for more than five years, you can exclude the greater of:
- 10 times your original basis, or
- 50% of the gain (up to $10,000,000 or 10 times basis, whichever is greater)
For most taxpayers, the $10,000,000 per-issuer lifetime cap is the binding limit. If you sell QSBS for a $20,000,000 gain and held it for more than five years, you can exclude $10,000,000 and report the remaining $10,000,000 as long-term capital gain.
The $10,000,000 cap is per issuer, not per transaction. If you hold stock in two different startups, each has its own $10,000,000 limit. If you hold multiple blocks of the same startup's stock, they share one $10,000,000 limit.
The three-year exception: partial exclusion
If you sell QSBS after holding it for more than three years but not more than five, you can still exclude 50% of the gain (subject to the same $10,000,000 per-issuer cap). You do not get the 10-times-basis boost.
This is the path some founders and early employees take when they need liquidity before the five-year mark. The trade-off is straightforward: you get half the exclusion, but you get cash in hand earlier.
What qualifies as QSBS?
Not every stock in a small business qualifies. Section 1202 requires that the stock meet all of the following tests at the time of issuance:
- Original issuance. You must acquire the stock at its original issuance — either directly from the corporation or in a conversion from other qualifying property. You cannot buy QSBS on the secondary market and claim the exclusion.
- C-corporation. The issuing entity must be a domestic C corporation. S corporations, partnerships, and LLCs do not qualify.
- Active trade or business. At least 80% of the corporation's assets must be used in the active conduct of one or more qualified trades or businesses at all times during your holding period. Passive investment companies, financial services firms, and farming operations generally do not qualify.
- Gross assets test. The corporation's aggregate gross assets must not have exceeded $50,000,000 at all times before and immediately after the issuance. Assets are measured at book value, not fair market value.
- Qualified type of stock. The stock must be common or preferred stock that is newly issued (not treasury stock). Options, warrants, and convertible debt do not qualify unless and until they are actually exercised or converted into qualifying stock.
The $50,000,000 gross assets test in practice
The $50,000,000 threshold is measured at issuance, not at sale. A company can grow well past $50,000,000 in assets and the stock you bought when it was smaller still qualifies. However, if the corporation issues new stock after its assets exceed $50,000,000, that new stock does not qualify as QSBS.
This means early investors in a fast-growing company often have a narrow window: stock issued while the company is still under the asset threshold qualifies, but later rounds may not.
Tax treatment of the excluded gain
Gain excluded under Section 1202 is not taxed at all — neither as ordinary income nor as capital gain. The remaining gain (the 50% not excluded under the three-year path, or the amount above $10,000,000 under the five-year path) is treated as long-term capital gain, provided the five-year holding period is met. If the three-year partial-exclusion path is used, the remaining 50% of gain is also long-term capital gain.
Excluded gain does not trigger the Net Investment Income Tax (NIIT). The NIIT applies to net investment income, which includes capital gains, but Section 1202-excluded gain is not included in gross income and therefore is not investment income.
Alternative minimum tax (AMT) interaction
For the AMT, 7% of the excluded gain is added back as a preference item. This means even taxpayers who exclude gain under Section 1202 may owe some AMT on the transaction. The 7% rate reflects the difference between the ordinary top marginal rate (37%) and the long-term capital gains rate (20%): the "benefit" of excluding gain that would otherwise be taxed at the higher ordinary rate is partially recaptured through the AMT.
Reporting requirements
QSBS exclusion is reported on Form 8949 and Schedule D. You must check the box indicating Section 1202 exclusion and enter the excluded amount in the appropriate column. The corporation should provide you with a statement confirming that the stock qualified as QSBS at the time of issuance — but you are responsible for retaining that documentation in case of an IRS audit.
Common mistakes
- Buying on the secondary market. If you buy QSBS from another shareholder rather than directly from the issuer, the stock does not qualify, even if the issuer originally issued it as QSBS.
- Assuming LLC equity qualifies. An LLC is a pass-through entity. Stock issued by an S corporation or membership interests in an LLC do not qualify. The owner must first convert the interest to C corporation stock (or the LLC must elect to be taxed as a C corporation) before the stock can qualify.
- Missing the five-year clock. The holding period starts on the date of issuance, not the date of vesting or the date you actually pay for the stock. If you receive restricted stock that vests over time, the holding period begins at issuance, not at vesting.
- Overlooking the per-issuer cap. The $10,000,000 limit is per issuing corporation, not per transaction or per year. Multiple sales of the same issuer's stock share one $10,000,000 ceiling.
When to use the three-year path
The three-year partial exclusion makes sense when:
- You need liquidity before the five-year mark and are willing to accept a 50% exclusion instead of 100%.
- The gain is large enough that even a 50% exclusion saves more tax than waiting five years (for example, if you expect your ordinary income tax rate to increase in future years).
- You want to diversify your portfolio and reduce concentration risk in a single employer's stock.
The five-year path is superior when you can afford to wait, because it doubles the exclusion amount and eliminates the entire gain (up to $10,000,000) rather than just half of it.
Bottom line
Section 1202 is one of the most powerful tax provisions available to founders, early employees, and angel investors. The five-year full exclusion can wipe out six figures or more in capital gains tax. The three-year partial exclusion offers a middle ground for those who need liquidity earlier. In both cases, careful attention to the qualification tests — especially the original issuance requirement and the $50,000,000 gross assets limit — is essential to ensuring the exclusion is actually available when you sell.
Disclaimer: This article is general educational information, not tax, legal, or investment advice. Dollar amounts come from the 2026 sources listed at the end of this article and may change. Before you act, talk to a licensed CPA, EA, or tax attorney about your own situation.