One of the biggest tax breaks in the Internal Revenue Code is qualified small business stock (QSBS). For founders, early employees, and investors, it can mean walking away from a big exit with little or no federal tax.
Here’s the short version:
- If you invest in a qualified small business after September 27, 2010, hold the stock for five years, and then sell, you can exclude at least $10 million of gain from federal tax.
- For stock acquired after July 4, 2025, the limit rises to $15 million and there are partial benefits if a holding period of 3 or 4 years is met.
That’s not a typo—this is one of the few areas of the tax code where the words “completely tax-free” are real (note, certain states, including California do tax QSBS gains).
What Counts as a Qualified Small Business?
To qualify, the company must:
- Be a domestic C corporation (not a partnership, S corp, REIT, RIC, etc.).
- Have less than $50M in assets from the date of formation through the date the stock is issued ($75M for stock issued after July 4, 2025). For this test you count (i) cash, plus (ii) tax basis of created assets, plus (iii) fair market value at time of contribution of contributed assets.
- Operate an active trade or business that isn’t a “services” company.
Excluded industries include law, health, consulting, finance, accounting, engineering, athletics, and other businesses where the main asset is the skill or reputation of employees.
The Active Business Test
The company must use at least 80% of its assets (by value) in the active conduct of its qualified trade or business during substantially all of a stockholder’s holding period.
There are two important carveouts: Working capital and R&D. Excess cash is allowed up to a higher limit if it’s earmarked for operations or research.
There is a separate prohibition against holding more than 10% (by value) in investment real estate.
For C corps older than two years, my practical rule is this—compare the company’s enterprise value (from a 409A valuation) to its cash and short-term investments. If the enterprise value is at least 50% higher than cash + short-term assets, you’re generally safe under the relaxed threshold as long as you don’t hold more than 10% in investment real estate.
Example: If a company has $5M in cash and short-term investments, you’d want its valuation to be at least $7.5M.
What About the Stockholder Rules?
To get the QSBS benefit, you need to:
- Receive stock directly from the company in exchange for cash, property (other than non-QSBS stock), or services.
- Avoid situations where the company has repurchased significant stock around the time of your issuance (there are 5%, 2%, and $10,000 thresholds).
Special Cases
- Stock for appreciated property: Only the appreciation after you contribute the property qualifies for QSBS.
- Pre-2010 holding periods: If your holding period reaches back before September 28, 2010, the exclusion is partial.
Why This Matters
For founders, early employees, and investors, QSBS is the difference between paying zero tax or millions in tax on an exit. But qualifying isn’t automatic—the rules are technical, and small missteps can blow the exclusion.
Mike Baker frequently advises with respect to qualified small business stock. He possesses a breadth and depth of experience in tax and employee benefits & compensation law that spans multiple decades. For additional information, please contact mike@mbakertaxlaw.com.