What Is the QSBS Exclusion and How Do Founders Qualify?
Last reviewed: July 2026
The QSBS exclusion Section 1202 provides lets founders exclude a large share of the gain on their company stock from federal capital gains tax, often the greater of $10 million or 10 times their basis. For stock issued after July 4, 2025, the cap climbs higher. The catch is that qualified small business stock is won or lost at formation, financing, and entity choice, long before anyone sells. Most founders who could have claimed it disqualified themselves years earlier without ever knowing the break existed.
Key Takeaways
- Qualified small business stock under Section 1202 can exclude the greater of $10 million or 10 times your basis in gain from federal tax.
- Stock acquired after July 4, 2025 uses a higher $15 million cap and a tiered 50%, 75%, and 100% exclusion at three, four, and five years.
- The company must be a domestic C corporation when the shares are issued; an LLC or S corp disqualifies the stock outright.
- Selling one month short of the five-year QSBS holding period can forfeit the whole exclusion, though Section 1045 may rescue an early sale.
About the Author: Jeff Judge, CFP®, AEP®, ChFC®, CLU® is Managing Partner of Chesapeake Financial Planners in Forest Hill, Maryland. He has been helping founders and business owners in Harford County and the Baltimore metro area plan around equity and business sales since earning his CFP® certification in 2013, using Chesapeake's signature process, the R.U.D.D.E.R. Method™. "The founders who capture this break are the ones who asked the entity and exit questions on day one," Jeff says. "By the time a buyer is at the table, most of the decisions that matter have already been made for you."
What Is the QSBS Exclusion Under Section 1202?
The QSBS exclusion is a deliberate tax incentive Congress built to reward people who found and fund small companies. If your stock qualifies as qualified small business stock and you hold it long enough, you can exclude a capped amount of the gain when you sell, entirely free of federal capital gains tax. It is not a loophole. It is written into the code, and the rules are specific.
The cap is the part most people misremember. Under the long-standing rules, the exclusion covers the greater of $10 million or 10 times your adjusted basis in the stock, per company. That 10x figure is the one founders overlook. If you contributed real basis at formation, say $3 million of property, your exclusion can run to $30 million, well past the $10 million headline. The break scales with what you actually put in.
The 2025 One Big Beautiful Bill Act reshaped Section 1202 for stock acquired after July 4, 2025. Older stock keeps the familiar rules. Newer stock gets a bigger cap, a higher size ceiling, and a tiered holding schedule, confirmed by the AICPA's Tax Adviser.
| Feature | Stock acquired on or before July 4, 2025 | Stock acquired after July 4, 2025 |
|---|---|---|
| Per-issuer gain cap | Greater of $10 million or 10x basis | Greater of $15 million or 10x basis |
| Holding period for full exclusion | 5 years for 100% | 5 years for 100%, 50% at 3 years, 75% at 4 years |
| Company gross-asset ceiling | $50 million | $75 million |
| Inflation indexing of the cap | None | Begins 2027 |
Why Do Most Founders Forfeit QSBS at Formation?
The single most common way to lose the QSBS exclusion is the entity you pick on day one. Qualified small business stock has to be stock in a domestic C corporation. An LLC, an S corporation, or a partnership does not issue it. Founders often choose an LLC early because it is cheap, flexible, and friendly to this year's tax return, with nobody in the room thinking about a sale a decade out. That decision quietly closes the door on Section 1202.
"The version of this you actually control is the one you handle early: you cannot go back and re-found the company once a buyer is already at the table."
Jeff Judge, CFP®
The second requirement decided at the start is how the stock came to you. It has to be acquired at original issuance, directly from the company, in exchange for money, property, or services. Buying shares from another shareholder on the secondary market does not count. Founders' stock usually clears this bar without a problem, because founders are the original holders.
Does converting an LLC to a C corporation restart the QSBS clock? Yes, and it matters. When you convert an LLC to a C corporation, the entity selection and tax implications change on the day of conversion, and that is generally when the qualifying five-year clock and your qualifying basis begin. Conversion can be the right move, but it resets the timeline rather than backdating it.
Why does this slip past smart people? The entity decision is fast and cheap, the founder is heads-down building, and day-to-day advisors are not weighing a sale years away. The QSBS question falls into the gap between the lawyer and the accountant, with nobody coordinating the two.
Which Companies and Shares Actually Qualify for Section 1202?
Two more tests decide whether C corporation stock qualifies, and both turn on facts set early. The first is size. The company's aggregate gross assets have to sit at or below the statutory ceiling, both before and immediately after the stock is issued, under Section 1202 of the tax code. That ceiling is $50 million for older stock and $75 million for stock issued after July 4, 2025. Cross it in an earlier financing round, and shares issued after that point can be disqualified even while earlier shares still count. The timing of an issuance against your funding rounds is a real planning lever.
The second test is what the company does. At least 80% of assets must be used in an active qualified trade or business, and Section 1202 carves out whole categories of work.
Which businesses cannot claim the Section 1202 exclusion? Businesses in these fields are excluded from qualifying:
- Health, law, accounting, consulting, engineering, architecture, actuarial science, performing arts, and athletics
- Banking, insurance, financing, leasing, investing, and brokerage or financial services
- Farming, mining and other natural-resource extraction, and running a hotel, motel, or restaurant
If the principal asset of the business is the reputation or skill of one or two employees, it is out.
How Does the Five-Year Holding Period Work, and What if You Sell Early?
The QSBS holding period is where founders run out of time. Under the older rules, you need to hold qualified small business stock for more than five years to reach the full 100% exclusion. Sell at four years and eleven months, and the exclusion can vanish entirely. Stock issued after July 4, 2025 softens this with a tiered schedule, 50% at three years and 75% at four, but the full break still waits at five.
That is why founders sometimes pull a closing forward or push it back to clear the five-year mark. It only works if the date is flagged a year ahead, tracked like a vesting cliff. Discover it during due diligence and the deal timeline usually owns you, not the other way around.
If you have to sell early, Section 1045 can preserve the benefit. It lets you roll the proceeds from qualified small business stock held more than six months into new qualifying stock within a 60-day reinvestment window, deferring the gain instead of losing the exclusion outright. It is a rescue hatch, not a substitute for holding. Coordinating the sale, the reinvestment, and the rest of your plan is exactly the kind of work a CFP handles inside a business exit plan.
How Much Can the QSBS Exclusion Save, and How Do Founders Multiply It?
The dollar figures are large enough to change a founder's life. On a $10 million qualifying gain, the federal tax you would otherwise owe runs to the top long-term capital gains rate of 20% plus the 3.8% net investment income tax. Excluding that gain can mean more than $2 million of federal tax that would otherwise be due. State tax is separate and varies, so the total picture depends on where you live and file.
The cap is per issuer, which opens two moves. Qualifying stock in a second company carries its own separate cap, so a serial founder does not share one limit across ventures. And because the cap applies per taxpayer per issuer, gifting qualifying shares to a spouse, children, or certain non-grantor trusts can give each recipient their own exclusion, a technique often called QSBS stacking. It has to be a genuine transfer, properly structured, with the holding period generally carrying over, and it has to be done well before a sale rather than in the weeks around one.
For founders here in Maryland, this matters more than the headlines suggest. The Baltimore metro's startup and life-sciences ecosystem, anchored by the Johns Hopkins and University of Maryland research corridor, produces exactly the venture-backed C corporations Section 1202 was written for. Many of the founders we meet across Harford County and the Forest Hill area are first-time company builders who have not run into the letters QSBS. The exclusion is federal, so it follows the stock wherever you live, but the planning window is the same everywhere: it opens at formation and closes at the sale.
This is where a real process earns its keep. The R.U.D.D.E.R. Method™ is Chesapeake Financial Planners' six-step planning process: Review and Recognize, Uncover and Understand, Design and Develop, Discuss and Decide, Execute and Empower, and Reassess and Refine. Jeff has sat across from more than one founder who learned about the five-year clock during due diligence, when it was already too late to move the closing date. Getting your entity, your basis, and your holding dates looked at together, alongside the broader tax planning that comes with a growing income, is what turns a possible break into a claimed one.
Frequently Asked Questions
What is the QSBS exclusion in simple terms?
The QSBS exclusion, from Section 1202, lets you exclude a capped amount of gain on qualified small business stock from federal capital gains tax when you sell. The cap is the greater of $10 million or 10 times your basis for older stock, and $15 million for stock acquired after July 4, 2025.
Does an LLC qualify for the QSBS exclusion?
No. An LLC cannot issue qualified small business stock, and neither can an S corporation or a partnership. Section 1202 requires stock in a domestic C corporation. Many founders convert an LLC to a C corporation to qualify, but conversion generally restarts the five-year holding clock from the conversion date.
How long do you have to hold QSBS to get the full exclusion?
You generally must hold qualified small business stock for more than five years to reach the full 100% exclusion. Stock acquired after July 4, 2025 adds a tiered schedule, 50% at three years and 75% at four, but the complete break still requires the five-year hold.
Can I still get QSBS treatment if I sell before five years?
Possibly, through Section 1045. If you held the qualified small business stock more than six months, you can roll the sale proceeds into new qualifying stock within 60 days and defer the gain. This preserves the benefit rather than losing it, though it requires reinvesting in another qualifying C corporation.
How much tax can the QSBS exclusion actually save?
On a $10 million qualifying gain, the exclusion can remove more than $2 million of federal tax, based on the 20% top long-term capital gains rate plus the 3.8% net investment income tax. Actual savings depend on your gain, your basis, and your state, which taxes the gain separately.
What kinds of businesses do not qualify for Section 1202?
Service-heavy and financial fields are excluded, including health, law, accounting, consulting, engineering, financial and brokerage services, banking, insurance, farming, natural-resource extraction, and hospitality. Product, software, and life-sciences companies typically qualify, while a business whose main asset is one person's reputation or skill usually does not.
Ready to put a plan around your QSBS before a sale is on the horizon? Jeff Judge and the Chesapeake team serve founders and business owners across Harford County and the Baltimore metro. Book a free fit call with Chesapeake Financial Planners.
A version of this article was originally published on Jeff Judge's LinkedIn.
Disclosures
The information provided is for educational purposes only and should not be construed as investment advice. Investment strategies should be tailored to individual circumstances, risk tolerance, and goals. Past performance doesn't guarantee future results. Consult with qualified financial professionals regarding your specific situation.
Advisors associated with Chesapeake Financial Planners may be either (1) LPL Financial Registered Representatives offering securities through LPL Financial, Member FINRA and SIPC, and investment advisor representatives offering investment advice through Great Valley Advisor Group; or (2) solely investment advisor representatives offering investment advice through Great Valley Advisor Group and not affiliated with LPL Financial. Great Valley Advisor Group, and Chesapeake Financial Planners are separate entities from LPL Financial.
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