Someone tells you your startup shares are QSBS. That can sound like the answer. It isn’t. Section 1202 qualification can depend on how the shares were acquired, when they were issued, what the company looked like then, and whether those facts can still be proven.
Someone tells you your startup shares are QSBS.
That can sound like the answer.
It is not.
Maybe the company told you. Maybe it appeared in your financing documents. Maybe another founder mentioned the Section 1202 exclusion and you started doing the math on what a future sale could mean.
But whether gain from those shares actually qualifies can depend on facts that existed years before the sale.
What kind of corporation issued the stock?
How did you acquire it?
How large was the corporation when the shares were issued?
What business did it actually conduct?
Were there redemptions, transfers, or restructurings along the way?
And under current law, exactly when the stock was acquired and issued can place different shares under different rules.
So what is QSBS?
Qualified Small Business Stock, or QSBS, is stock that satisfies the requirements of Section 1202 of the Internal Revenue Code. If the stock and shareholder satisfy the applicable rules, Section 1202 can exclude some or all of otherwise taxable gain when the stock is sold or exchanged.
The important word is satisfies.
QSBS is not simply a label attached to a startup.
It is a tax result that depends on the history of particular shares.
At a high level, Section 1202 asks several different questions:
Those questions do not all use the same date.
That became especially important after legislation enacted on July 4, 2025 changed the Section 1202 holding-period schedule, the per-issuer dollar limitation, and the gross-assets threshold.
| Stock acquisition period | General holding-period framework | Potential exclusion |
|---|---|---|
| Aug. 11, 1993–Feb. 17, 2009 | More than 5 years | Generally 50% |
| Feb. 18, 2009–Sept. 27, 2010 | More than 5 years | Generally 75% |
| Sept. 28, 2010–July 4, 2025 | More than 5 years | Generally 100% |
| After July 4, 2025 | At least 3 years | 50% |
| After July 4, 2025 | At least 4 years | 75% |
| After July 4, 2025 | At least 5 years | 100% |
That means two shareholders in the same company can potentially be looking at different Section 1202 rules.
The company can be the same.
The stock can look similar.
The dates can still change the analysis.
Holding shares in a startup is not enough.
Section 1202 imposes requirements on the corporation, the stock, how the shareholder acquired it, what the corporation did during the holding period, and what happened to the shares afterward.
QSBS begins with stock of a qualifying domestic C corporation.
An LLC interest does not itself become QSBS because the business is small or fast-growing. Neither does stock in an S corporation.
A business that later converts into a C corporation can require a more specific analysis because the history before and after the conversion matters.
The corporation also generally must remain a C corporation and satisfy the active-business requirements during substantially all of the shareholder's relevant holding period.
The shareholder generally must acquire the stock at original issuance directly from the corporation in exchange for:
This requirement matters more than it may appear.
Founder stock can potentially qualify.
Employee stock can potentially qualify.
Shares issued when an employee exercises an option can potentially qualify.
But buying shares from another shareholder is a different transaction.
The fact that someone else owned QSBS does not automatically mean the shares remain QSBS in the hands of an ordinary secondary-market buyer.
The acquisition path matters.
The issuing corporation must also satisfy an aggregate gross-assets test.
For older stock, the familiar threshold is $50 million.
For stock issued after July 4, 2025, the legislation increased that threshold to $75 million, with future indexing under the statute.
But this is not simply a test of what the company is “worth.”
The statutory calculation looks to the corporation's aggregate gross assets immediately before and immediately after the relevant issuance, using Section 1202's rules.
That can produce a very different question from:
“What was the startup's valuation?”
During substantially all of the relevant holding period, the corporation generally must use at least 80% of its assets by value in the active conduct of one or more qualified trades or businesses.
The statute contains rules for startup activities, research, and certain working-capital situations, but the requirement remains factual.
The company has to be doing something that fits within the statute.
Not every C corporation conducting an active business qualifies.
Section 1202 excludes specified categories, including certain businesses involving health, law, accounting, consulting, financial and brokerage services; banking and similar financial activities; farming; specified natural-resource activities; and hotels, restaurants, and similar businesses.
At the margins, classification can be highly factual.
The important question is not simply what industry label appears on the company's website.
It is what business the corporation actually conducted.
Holding period is necessary.
It is not enough by itself.
A taxpayer can hold startup shares for ten years and still fail Section 1202 if the stock did not satisfy the original-issuance rule, the issuer failed the applicable gross-assets test, or another requirement was not met.
And after the 2025 legislation, there is no longer one universal “QSBS five-year rule.”
This is where older advice can become dangerous.
For years, QSBS was commonly summarized with a simple instruction:
Hold the stock for more than five years.
That shorthand made sense as a starting point under the legacy regime.
It is no longer a complete description of current law.
For qualifying stock acquired after July 4, 2025, current Section 1202 provides:
Stock acquired on or before July 4, 2025 remains subject to the older acquisition-date framework.
That includes the historical exclusion percentages:
The new three-year rule therefore did not convert every existing QSBS position into stock that can be sold after three years.
The acquisition date matters.
The 2025 legislation also says that, for Section 1202 purposes, the acquisition date is determined after applying the holding-period rules of Section 1223. That becomes relevant where a transaction carries or tacks a prior holding period rather than simply starting a new clock.
Another common shortcut says:
“A QSBS company has to have less than $75 million in assets.”
That is also incomplete.
The newer $75 million amount applies to stock issued after July 4, 2025. Congress expressly made the amendment to the gross-assets threshold effective for stock issued after enactment.
Earlier issuances remain tied to the legacy $50 million framework.
So consider two people receiving shares directly from the same corporation.
One receives shares before July 5, 2025.
The other receives newly issued shares after July 4, 2025.
The same corporation may need to be tested under different gross-assets thresholds for those two issuances.
The test also looks at aggregate gross assets immediately before and immediately after the issuance under the statutory rules.
That is why a later headline valuation does not answer the question.
A company can eventually be worth hundreds of millions of dollars without that fact, standing alone, proving that stock failed the gross-assets test when it was issued.
Conversely, a modest current valuation does not prove that the corporation satisfied the test years earlier.
What matters is the statutory test at the relevant issuance.
A headline number can sound more universal than it is.
You may now hear:
“The QSBS exclusion is $15 million.”
That is not accurate for every taxpayer or every share.
The amount of gain that can receive Section 1202 treatment is subject to an issuer-by-issuer limitation. Gain outside that treatment returns to the ordinary framework described in what a capital gain is.
The statutory formula generally uses the greater of:
The 2025 legislation changed the dollar side of that formula.
For stock acquired on or before July 4, 2025, the statutory dollar amount remains $10 million, subject to the coordination rules for prior eligible gain.
For stock acquired after July 4, 2025, the new statutory dollar amount is $15 million, again subject to coordination with prior Section 1202 gain involving the same issuer.
The $15 million amount is scheduled to receive inflation adjustments for taxable years beginning after 2026.
So the question isn't simply:
“Is the limit $10 million or $15 million?”
It is:
“Which Section 1202 limitation regime applies to these shares?”
And the 10× basis alternative remains part of the calculation.
QSBS is often discussed as though it were primarily an investor benefit.
The original-issuance rule is broader than that.
Section 1202 allows qualifying stock to be issued for services as well as money or other eligible property.
That means founder shares and employee shares can potentially qualify if the other Section 1202 requirements are satisfied.
Restricted stock can add another timing question.
For tax purposes, property transferred in connection with services can remain substantially nonvested until the relevant restrictions lapse. A valid Section 83(b) election can affect that timing in appropriate circumstances.
That interaction can matter to the holding-period analysis.
But Section 83(b) is not a universal “QSBS election,” and making the election does not cause otherwise nonqualifying stock to satisfy Section 1202.
An option itself is not stock.
That distinction matters because someone may receive an option years before exercising it and assume the QSBS clock has been running the entire time.
It has not merely because the option existed.
Stock actually issued by the corporation when the option is exercised can potentially qualify if the Section 1202 requirements are met.
That means the option's grant date is not the date the employee acquires the stock for Section 1202 purposes.
At exercise, the actual stock issuance must be analyzed: original issuance, applicable gross-assets threshold, business qualification, and the relevant holding-period rules.
Imagine a founder owns shares that satisfy Section 1202.
Another investor buys those shares directly from the founder.
The buyer does not automatically inherit QSBS treatment merely because the seller's shares qualified.
Why?
Because Section 1202 generally requires the taxpayer to acquire the stock at original issuance from the corporation, subject to specific statutory exceptions and carryover rules.
A direct purchase from another shareholder is ordinarily a secondary transaction.
This is one of the clearest examples of why asking:
“Is this a QSBS company?”
can lead to the wrong analysis.
The better question is:
“How did I acquire these particular shares?”
Some QSBS issues are visible from the share certificate or cap table.
Others are buried in the company's history.
Section 1202 contains special redemption rules.
Certain repurchases involving the shareholder, related persons, or the corporation more broadly can affect whether stock qualifies as originally issued QSBS.
A shareholder may never have viewed a corporate repurchase as part of their own tax history.
For Section 1202, it can matter.
A merger, recapitalization, conversion, or other reorganization does not produce one universal QSBS result.
Section 1202 contains specific rules that can preserve treatment in certain exchanges, sometimes subject to limitations.
So the right question is not:
“Does a merger destroy QSBS?”
It is:
“What transaction occurred, what stock was surrendered and received, and which carryover rule applies?”
A company can change while the shareholder simply keeps holding the same certificate.
That matters.
If the corporation ceases to satisfy the C-corporation or active-business requirements during the relevant period, the historical qualification analysis can change.
Similarly, a business that changes what it actually does can create a qualified-trade-or-business issue even though the company's legal name and stock certificates remain unchanged.
Gifts and transfers at death receive specific statutory treatment that can preserve QSBS attributes rather than forcing every recipient to satisfy original issuance personally.
But that does not mean every trust, estate, or other transfer can be treated as harmless without analysis.
The transfer rule matters.
The larger lesson is:
QSBS qualification is a history, not a label.
For qualifying stock acquired after July 4, 2025, selling before five years no longer automatically means there is no Section 1202 exclusion.
If the stock has been held:
Those phased rules apply to qualifying post-enactment stock.
They do not retroactively replace the legacy rules for earlier acquisitions.
There is also another provision that can matter when qualifying small-business stock is sold early: Section 1045.
Section 1045 can allow a noncorporate taxpayer to defer eligible gain where qualifying small-business stock held for more than six months is sold and qualifying replacement stock is purchased within the statutory 60-day period, subject to the provision's requirements.
Section 1045 is not another QSBS exclusion.
It is a rollover and deferral rule.
The deferred gain is generally preserved through the basis rules for the replacement stock rather than permanently excluded merely because Section 1045 was used.
This is where QSBS often becomes less about learning a tax rule and more about proving an old fact.
Imagine approaching a sale eight years after receiving startup stock.
You know what you own.
You know what someone is offering to pay for it.
Your brokerage statement may even tell you when the shares entered your account and what you paid.
But it probably does not tell you:
And suddenly, the tax question you're asking today depends on corporate facts from years ago.
Useful records may therefore include:
This is a practical substantiation list derived from the facts Section 1202 requires taxpayers to establish.
It is not a single IRS-prescribed QSBS document checklist.
A company may also provide a letter or statement indicating that it believes the stock satisfies QSBS requirements.
That can be useful evidence.
It is not a substitute for the underlying facts.
And it does not transform an otherwise nonqualifying transaction into QSBS.
A useful first review is not to demand a yes-or-no answer immediately.
Start by identifying the facts that would have to support one.
That checklist does not produce a tax opinion.
It tells you what the opinion would have to be built from.
A major transaction is an especially poor time to discover that the relevant corporate history was never preserved.
Not universally.
Qualifying stock acquired after July 4, 2025 can receive a 50% exclusion after at least three years, 75% after at least four years, and 100% after at least five years.
Earlier acquisitions remain governed by the applicable legacy rules.
Not for every share or taxpayer.
The new $15 million statutory dollar limit applies to qualifying stock acquired after July 4, 2025, subject to the coordination rules.
Stock acquired on or before that date remains associated with the $10 million framework.
The alternative 10× adjusted-basis limitation also remains part of Section 1202.
No.
Congress made the $75 million amendment applicable to stock issued after July 4, 2025.
Older issuances remain under the legacy $50 million framework.
Potentially.
Founder stock still has to satisfy the Section 1202 requirements, including original issuance, the applicable issuer tests, and the holding-period rules.
Being a founder is not itself a statutory shortcut.
Potentially.
The option itself is not QSBS stock.
Shares actually issued by the corporation when the option is exercised may qualify if the relevant Section 1202 requirements are met.
An ordinary secondary purchase generally does not satisfy the original-issuance requirement simply because the seller's shares qualified.
Specific statutory transfer rules can create different results in particular transactions.
Section 1202 contains a special rule for qualifying transfers by gift that can preserve QSBS attributes and holding period.
The precise ownership and transfer facts still matter.
No federal rule requires every state to produce the same result.
State conformity and the taxpayer's residency can require separate analysis before assuming that a federal exclusion will also eliminate state tax.
A company statement can be useful supporting documentation.
But Section 1202 qualification depends on the underlying statutory facts.
The tax result does not arise merely because a document calls the shares “QSBS.”
Someone approaching a startup exit may naturally ask:
How much of my gain can I exclude?
It's an understandable question.
The number can be significant.
But Section 1202 often requires an earlier set of questions.
What corporation issued these shares?
How were they acquired?
When were they issued?
When were they acquired?
What were the corporation's gross assets then?
What business did it conduct afterward?
Were shares repurchased?
Was the company reorganized?
Can those facts still be established?
The sale may be happening today.
The facts that determine its tax treatment may have been created years ago.
The tax return does not create those facts.
It reports the result of them.
That is why the more useful question before a major QSBS sale is not simply:
“How much gain can I exclude?”
It is:
“What facts would have to be true for this stock to qualify—and can I still prove them?”
IRC §1202 — Qualified Small Business Stock. Governs the exclusion, stock and issuer qualification requirements, original issuance, gross-assets test, active-business test, excluded businesses, limitation rules, redemptions, and specified transfers and exchanges. Current U.S. Code text reflects the 2025 amendments.
Public Law 119-21, §70431 — Expansion of Qualified Small Business Stock Gain Exclusion. Enacted July 4, 2025. Establishes the new 3-, 4-, and 5-year phased exclusions, the $15 million post-enactment dollar limit, and the $75 million post-enactment issuance threshold, along with statutory effective-date rules.
IRC §1045 — Rollover of Gain From Qualified Small Business Stock. Provides the separate rollover/deferral regime for qualifying replacement-stock transactions.
IRC §83 and Treasury Regulations under §83 — Property Transferred in Connection With Services. Relevant where founder or employee restricted stock is subject to vesting.
IRC §1223 — Holding Period of Property. Relevant because amended §1202 expressly uses §1223 when determining the acquisition date for the post-2025 regime.
IRS Instructions for Schedule D (Form 1040). IRS reporting guidance describing the historical Section 1202 acquisition-date exclusion regimes.
This article provides general educational information and is not individualized tax advice. Tax treatment can depend on the year, jurisdiction, transaction structure, and complete facts involved.
If you’re exercising options, selling shares, reconciling basis, or trying to understand what has already happened, PRISM can help you work through the tax consequences.
If something has changed this year — or you're simply not sure where you stand — PRISM can help you understand what deserves attention.
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