Quick answer: Section 1202 lets founders and early investors in a qualifying C corporation exclude some or all of the gain on qualified small business stock (QSBS) from federal income tax when they sell it. Stock issued after September 27, 2010 can qualify for a full 100% exclusion once held more than five years, capped at the greater of $10 million or 10 times the investor’s basis in the stock (that cap moves to $15 million for stock issued after July 4, 2025). The One Big Beautiful Bill Act (OBBBA) added a tiered schedule for newly issued stock — 50% exclusion after three years, 75% after four, 100% after five — and raised the gross-asset test ceiling from $50 million to $75 million for corporations issuing stock after that same date. Older stock keeps the old all-or-nothing five-year rule.
Why QSBS Planning Suddenly Matters Again
For most of the last decade, Section 1202 sat quietly in the tax code as a niche benefit that founders’ lawyers mentioned once, usually at incorporation, and then rarely revisited until an acquisition term sheet showed up. That changed the moment the One Big Beautiful Bill Act reworked the holding-period and gross-asset rules for stock issued on or after July 4, 2025. Founders who incorporate today, investors writing checks into seed rounds this year, and anyone advising a small C corporation now have two parallel sets of rules to track depending on the issuance date of the shares in question.
That split matters because Section 1202 is not a small deduction. It is a full or partial exclusion from gross income, not merely a lower rate, and it applies to what is often the single largest liquidity event of someone’s financial life — the sale of a company they built or backed early. A founder who sells $8 million of qualifying stock after a five-year hold pays zero federal capital gains tax on that amount under the exclusion. Get the qualification wrong, however, and the entire benefit can evaporate, turning what looked like a tax-free exit into an ordinary capital-gains bill with penalties for underpayment layered on top.
The stakes are rising for another reason: more companies stay private longer, more equity compensation is granted in early-stage C corporations rather than LLCs, and more families are exploring multi-trust “stacking” arrangements to multiply the exclusion cap across relatives. Each of those trends makes precise knowledge of the current rules — pre-OBBBA and post-OBBBA — a practical necessity rather than a theoretical one.
What Counts as Qualified Small Business Stock
Before any exclusion percentage matters, the stock itself has to qualify. The requirements sit in Section 1202(c) and (d), and they attach to the stock at the moment it is issued — not at the moment it is sold. That timing detail trips up more taxpayers than any other part of the statute.
The Issuing Company Must Be a Domestic C Corporation
Only stock in a domestic C corporation can be QSBS. S corporations, partnerships, LLCs taxed as partnerships, and foreign corporations are all excluded outright, regardless of how small or how “qualified” the underlying business activity is. A common failure pattern: a company starts as an LLC for its first two years, converts to a Delaware C corporation before a priced round, and the founders assume their original sweat-equity units carry over the same holding period. They do not. The QSBS clock for stock received in the conversion generally starts on the date of the conversion, not the date the LLC was formed, unless the conversion is structured very carefully as an F-reorganization with specific continuity requirements met.
The Corporation Must Meet the Active Business Requirement
At least 80% of the corporation’s assets, by value, must be used in the active conduct of one or more qualified trades or businesses during substantially all of the taxpayer’s holding period. Certain businesses are automatically disqualified regardless of asset composition: health, law, engineering, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, banking, insurance, financing, leasing, investing, farming, mineral extraction under percentage depletion, and operating a hotel, motel, restaurant, or similar hospitality business. Software companies, manufacturers, biotech firms, most consumer products businesses, and most technology platforms generally clear this hurdle, which is why QSBS planning is so concentrated in venture-backed technology and life sciences.
The Gross Assets Test at Issuance
The corporation’s aggregate gross assets — cash plus the adjusted basis of other property — cannot exceed a statutory ceiling immediately before and immediately after the stock is issued. For decades this ceiling sat at $50 million. Under OBBBA, stock issued after July 4, 2025 is tested against a new $75 million ceiling instead. Stock issued on or before that date is still measured against the old $50 million threshold, even if the company later grows past $75 million; the test is a snapshot at issuance, not an ongoing requirement.
Original Issuance, Not Secondary Purchase
QSBS generally must be acquired directly from the corporation — through a stock purchase, an option exercise, a restricted stock grant, or a qualifying stock-for-stock exchange — in exchange for money, property, or services. Buying shares from another shareholder on a secondary market or through most tender offers does not create QSBS in the buyer’s hands, even if the shares were QSBS when the original holder received them.
The Exclusion Cap: How Much Gain Actually Escapes Tax
Even after stock qualifies, the exclusion is not unlimited. Per issuer, per taxpayer, the excludable gain in a given tax year is capped at the greater of two amounts: $10 million, or 10 times the taxpayer’s adjusted basis in the stock that was disposed of during that year. The $10 million figure is a lifetime, per-issuer limit (reduced by amounts excluded in prior years on stock from the same company), while the 10x-basis test is recalculated each time stock is sold and can produce a larger allowance for investors who put in substantial capital.
OBBBA raises this baseline for the newest cohort of stock. For QSBS issued after July 4, 2025, the flat-dollar component of the cap increases from $10 million to $15 million, and that figure is indexed for inflation in later years. Stock issued on or before that date keeps the $10 million figure, unindexed. A married couple filing jointly does not get to double the cap for stock they hold jointly, but separate trusts, and separate spouses each holding stock directly, each get their own cap — which is the foundation of the stacking strategies discussed below.
The New Tiered Holding-Period Rules Under OBBBA
Historically, Section 1202 worked on an all-or-nothing five-year clock: sell qualifying stock before the five-year anniversary of issuance and none of the special exclusion applied (the gain was simply taxed as an ordinary long-term or short-term capital gain, subject to whatever general holding-period rules applied); cross the five-year mark and the full applicable exclusion percentage — 50%, 75%, or 100% depending on issuance date under prior law — became available in one step.
OBBBA replaces that cliff, for stock issued after July 4, 2025, with a graduated schedule that lets investors realize a partial benefit earlier:
- Less than 3 years held: 0% exclusion — ordinary capital gains treatment applies, with the standard 28% collectibles-style rate that historically attached to any taxable QSBS gain also generally inapplicable since none of the special exclusion is in play.
- 3 years, less than 4: 50% of the gain is excluded from income.
- 4 years, less than 5: 75% of the gain is excluded.
- 5 years or more: 100% of the gain is excluded, subject to the applicable dollar cap.
Stock issued on or before July 4, 2025 does not get this graduated schedule. It remains governed by the prior-law tiers, which are themselves date-dependent: stock issued after September 27, 2010 qualifies for a full 100% exclusion once the five-year holding period is met; stock issued between February 18, 2009 and September 27, 2010 qualifies for a 75% exclusion at five years; and stock issued before February 18, 2009 qualifies for only a 50% exclusion at five years, with a portion of the excluded gain historically treated as an AMT preference item for that oldest tranche.
The practical effect is that two employees at neighboring companies, one who received restricted stock in June 2025 and one who received an identical grant in August 2025, are now on materially different clocks. The June grant needs a full five years for any exclusion; the August grant can start harvesting a 50% exclusion after only three.
Worked Example: Comparing an Early Exit Under the Old and New Rules
Consider two hypothetical founders, each holding QSBS in a company that is acquired for a large gain, to see how the tiered schedule changes outcomes.
Scenario A — Pre-OBBBA stock (issued March 2024). Founder Maya received founder stock with a basis of $50,000. The company is acquired four years and two months later, and her gain on sale is $6,000,000.
Because her stock was issued before July 4, 2025, the old all-or-nothing five-year rule applies. At four years and two months, she has not crossed the five-year threshold, so none of the Section 1202 exclusion is available. Her $6,000,000 gain is taxed as an ordinary long-term capital gain — a federal liability of roughly $1,428,000 at the top 23.8% combined capital-gains-plus-NIIT rate she is subject to, before considering state tax.
Scenario B — Post-OBBBA stock (issued September 2025). Founder Dev received an equivalent grant with a $50,000 basis in a company issuing stock after the July 4, 2025 cutoff. His company is also acquired at the four-year-two-month mark, with an identical $6,000,000 gain.
Dev’s stock falls in the “4 years, less than 5” tier, so 75% of his gain — $4,500,000 — is excluded from taxable income. Only $1,500,000 remains taxable at ordinary capital-gains rates, producing a federal liability of roughly $357,000. Dev keeps approximately $1,071,000 more than Maya on an identical economic outcome, purely because of when his stock was issued and the tiered schedule that now applies to it.
Neither founder comes close to the $10 million or $15 million dollar caps in this example, so the 10x-basis alternative and the flat-dollar ceiling are not binding constraints here — the entire difference comes from the holding-period tier. That is the detail advisors need to internalize: for large gains relative to basis, the holding-period tier now often matters more than the exclusion cap itself.
Federal tax owed on a $6,000,000 gain, by scenario
Maya (pre-OBBBA)
Dev (post-OBBBA)
Illustrative figures assuming a combined 23.8% federal rate on the taxable portion of gain; excludes state tax and AMT preference items. Not tax advice.
Exclusion Percentage by Holding Period and Issuance Date
The table below consolidates the layered rules so the applicable tier for any given issuance date and holding period can be checked at a glance.
| Stock issuance date | Holding period reached | Exclusion % | Dollar cap | Gross-asset ceiling at issuance |
|---|---|---|---|---|
| Before Feb 18, 2009 | 5+ years | 50% | Greater of $10M or 10x basis | $50M |
| Feb 18, 2009 – Sep 27, 2010 | 5+ years | 75% | Greater of $10M or 10x basis | $50M |
| Sep 28, 2010 – Jul 4, 2025 | Under 5 years | 0% | — | $50M |
| Sep 28, 2010 – Jul 4, 2025 | 5+ years | 100% | Greater of $10M or 10x basis | $50M |
| After Jul 4, 2025 | Under 3 years | 0% | — | $75M |
| After Jul 4, 2025 | 3 to under 4 years | 50% | Greater of $15M or 10x basis | $75M |
| After Jul 4, 2025 | 4 to under 5 years | 75% | Greater of $15M or 10x basis | $75M |
| After Jul 4, 2025 | 5+ years | 100% | Greater of $15M or 10x basis | $75M |
The Stacking Strategy: Multiplying the Exclusion Across Family Members and Trusts
Because the dollar cap applies per taxpayer, per issuer, families with substantial QSBS positions often look for legitimate ways to create more than one taxpayer with an interest in the same stock. This is generally called “stacking,” and the most common vehicle is a non-grantor trust.
A non-grantor trust is treated as its own separate taxpayer for income tax purposes, distinct from the person who funded it. If a founder gifts a portion of QSBS to an irrevocable non-grantor trust well before any sale is anticipated, and the trust is respected as a separate taxpayer, the trust generally gets its own $10 million (or $15 million) cap and its own 10x-basis calculation, independent of the founder’s own cap. Spread across a founder, a spouse, and two or three properly structured trusts for children or other beneficiaries, a single block of stock can theoretically shelter several multiples of the base exclusion amount from tax.
Several conditions determine whether stacking actually works rather than merely looking clever on paper:
- The gift must happen before any binding sale agreement exists. Transferring stock into a trust after a term sheet is signed, or after the buyer is effectively locked in, invites an IRS argument that the gain was already fixed in the founder’s hands (an assignment-of-income problem) and that the transfer should be disregarded for tax purposes.
- The trust must be a genuine non-grantor trust. Many estate-planning trusts are intentionally structured as grantor trusts for other tax reasons — meaning the grantor, not the trust, is treated as the taxpayer for income tax purposes. A grantor trust does not create a second QSBS cap because it is not a separate taxpayer under Section 1202’s rules; the exclusion simply flows back to the same person who already has a cap.
- Gift and generation-skipping transfer tax consequences apply. Moving appreciated or unrealized-gain stock into a trust is a gift for transfer-tax purposes, valued at the time of the transfer, and may consume lifetime exemption or trigger gift tax depending on the size of the transfer and the family’s existing exemption usage.
- Each trust needs its own holding period and its own basis carried over from the donor. A trust that receives stock by gift generally takes the donor’s basis and, for holding-period purposes, is treated as having held the stock since the donor acquired it — so stacking does not reset the clock, but it does not shorten it either.
Because the IRS has scrutinized aggressive multi-trust stacking arrangements in guidance and private rulings, families considering this approach typically work with estate-planning counsel who specializes in irrevocable trust drafting alongside a tax advisor who models the gift-tax cost against the projected exclusion benefit. Stacking done years in advance of a liquidity event, with properly independent trustees and real economic substance to each trust, sits on much firmer ground than a stack assembled in the weeks before a signed acquisition.
Common Disqualifiers That Erase the Exclusion
Section 1202 rewards patience and precision, and it punishes a handful of recurring missteps just as reliably.
Redemptions Near the Time of Issuance
If the corporation redeems a meaningful amount of its own stock from the taxpayer or a related person within specific windows around the issuance date, the stock issued afterward can fail to qualify as QSBS under the anti-abuse redemption rules. Companies doing repeated buybacks of founder or early-investor shares need to check this before issuing new stock to anyone who might later claim QSBS treatment.
Converting to an S Corporation
Once stock qualifies as QSBS while the company is a C corporation, a later conversion to S corporation status does not retroactively disqualify the stock already held, but no new QSBS can be created while the company operates as an S corporation, since only C corporation stock is eligible in the first place.
Exceeding the Active Business Threshold Through Passive Assets
A company that raises a large round and parks most of the cash in short-term investments while product development stalls risks failing the 80% active-business-asset test during the holding period, not just at issuance. Working capital reasonably held for near-term business needs generally counts as an active asset, but cash held well beyond a reasonable operating reserve, or invested in securities unrelated to the business, can tip the balance the wrong way.
Acquiring Stock Through the Wrong Channel
Exercising options is fine; buying founder shares secondhand from a departing co-founder on a private secondary transaction typically is not, because that is not an original issuance from the corporation. Employees who assume that any company stock automatically carries QSBS treatment are often surprised to learn that shares purchased from another individual do not qualify no matter how early-stage the company remains.
Missing the Reporting and Substantiation Trail
There is no formal “QSBS certificate” the IRS issues in advance. Taxpayers substantiate their claim at the time of sale using Form 8949 and Schedule D, and the burden falls on the taxpayer to show the corporation met the requirements throughout the relevant period. Companies that never bothered to track gross assets at issuance, or that cannot produce evidence of the 80% active-business-asset test being satisfied, leave shareholders exposed if the IRS challenges the exclusion years later.
Wrong Entity Type at the Point of Investment
Investing through a partnership or an LLC taxed as a partnership can still preserve QSBS treatment for the individual partners, provided the partnership itself acquired the stock at original issuance and the partner held their partnership interest at the time the partnership acquired the stock — but the mechanics are intricate, and many investors mistakenly assume any pass-through wrapper works identically to holding stock directly.
A Practical Qualification and Planning Checklist
- Confirm the issuing entity is, and was at issuance, a domestic C corporation — not an LLC, S corp, or foreign entity.
- Document the corporation’s aggregate gross assets immediately before and after the specific issuance date, and note which gross-asset ceiling ($50M or $75M) applies based on that date.
- Verify the company’s primary trade or business is not on the excluded-activity list (services, hospitality, finance, farming, and similar carve-outs).
- Record the exact issuance date of each block of stock separately — options exercised at different times create separate QSBS “lots” with separate five-year clocks.
- Track whether the stock was issued before or after July 4, 2025, since that date determines whether the old cliff rule or the new tiered schedule applies.
- Retain records of how the stock was acquired (direct purchase, option exercise, restricted grant) to prove original issuance rather than a secondary purchase.
- Monitor ongoing compliance with the 80% active-asset test, particularly after large capital raises that increase cash holdings.
- Before any anticipated liquidity event, model the 10x-basis alternative against the flat-dollar cap to see which produces a larger exclusion.
- If considering stacking through trusts, complete gifting well in advance of any sale discussions and confirm each trust is a genuine non-grantor, separate-taxpayer trust.
- Coordinate with the corporation’s counsel or CFO to obtain contemporaneous confirmation of gross-asset figures and active-business status for the tax file.
Key Takeaways
- Section 1202 can exclude up to 100% of eligible gain on qualified small business stock, but only C corporation stock meeting strict active-business and gross-asset tests at issuance is eligible.
- The exclusion is capped per issuer, per taxpayer, at the greater of a flat dollar amount ($10 million for stock issued on or before July 4, 2025; $15 million after) or 10 times the taxpayer’s basis in the stock sold.
- OBBBA introduced a tiered holding-period schedule for stock issued after July 4, 2025 — 50% at three years, 75% at four years, 100% at five years — replacing the prior all-or-nothing five-year cliff for that newer stock.
- The gross-asset ceiling for qualifying at issuance rose from $50 million to $75 million for stock issued after the same July 4, 2025 cutoff.
- Stacking the exclusion across non-grantor trusts can multiply the available cap across family members, but only when trusts are funded with real economic substance well before a sale is anticipated.
- Common disqualifiers include buying shares secondhand rather than at original issuance, excess passive assets crowding out the active-business test, and improper redemptions around the issuance date.
Frequently Asked Questions
Does Section 1202 apply to stock in an LLC or S corporation?
No. Only stock in a domestic C corporation can qualify as QSBS. If a business operates as an LLC taxed as a partnership or as an S corporation, none of its equity interests are eligible for the Section 1202 exclusion, even if the underlying business would otherwise meet the active-trade-or-business test.
What is the QSBS exclusion cap for stock issued after July 4, 2025?
For stock issued after July 4, 2025, the per-issuer exclusion cap is the greater of $15 million or 10 times the taxpayer’s adjusted basis in the stock sold during the year, subject to reaching the applicable holding-period tier. Stock issued on or before that date keeps the older $10 million flat-dollar figure.
How long do I need to hold QSBS to get any exclusion under the new rules?
For stock issued after July 4, 2025, a 50% exclusion becomes available after a three-year holding period, rising to 75% after four years and 100% after five years. Stock issued on or before that date generally needs the full five years before any of the special exclusion applies.
Can I stack the QSBS exclusion by gifting stock to multiple trusts?
Gifting QSBS to properly structured, genuine non-grantor trusts well before a sale is contemplated can give each trust its own separate exclusion cap, since each is treated as its own taxpayer. The strategy requires careful timing, real trust independence, and attention to gift-tax consequences, and it works best when set up years ahead of any anticipated liquidity event rather than shortly before one.
What is the gross-assets test and when is it measured?
The gross-assets test measures the issuing corporation’s total assets, valued at cash plus the adjusted basis of other property, immediately before and immediately after the stock is issued. It must be at or under $50 million for stock issued on or before July 4, 2025, or at or under $75 million for stock issued after that date. It is a one-time snapshot at issuance, not a continuing requirement.
Does buying stock from another employee on a secondary sale qualify for the exclusion?
Generally no. QSBS treatment typically requires that the stock be acquired directly from the issuing corporation at original issuance, in exchange for cash, property, or services. Purchasing shares from another shareholder in a private secondary transaction usually does not create QSBS in the buyer’s hands.
References
- Internal Revenue Code Section 1202, Cornell Legal Information Institute, law.cornell.edu/uscode/text/26/1202
- Internal Revenue Service, Topic on capital gains and losses, irs.gov/taxtopics/tc409
- Joint Committee on Taxation, technical explanations of recent reconciliation legislation, jct.gov
- U.S. Government Publishing Office, public laws and statutes at large, govinfo.gov
- American Institute of Certified Public Accountants, guidance on Section 1202 planning, aicpa-cima.com
- National Venture Capital Association, model documents and tax policy commentary, nvca.org
Disclaimer: This article is educational and does not constitute individualized tax, legal, or investment advice. Section 1202 involves date-sensitive rules that vary by issuance year, and small factual differences can change the outcome materially. Confirm your specific situation with a qualified tax attorney or CPA before relying on any QSBS exclusion, and if you are separately streamlining routine filings, a resource like our guide to AI tax automation for freelancers covers how automated tools handle everyday compliance so you can focus advisory time on structural questions like QSBS eligibility.
