A founder sells her startup four years after raising her seed round. Under the pre-2025 rules, she would have missed the Section 1202 gain exclusion entirely — a holding period one day short of five years meant zero exclusion, full capital gains tax on every dollar. Under the new rules, the same exit produces a 75 percent federal exclusion on up to $15 million of gain. The difference, for a $10 million stake, can exceed $1.7 million in federal tax saved.
That is the new world Section 1202 created on July 4, 2025, when the One Big Beautiful Bill Act took effect. The qualified small business stock (QSBS) exclusion was already the most generous tax break in the Internal Revenue Code for founders and early investors. Now it is dramatically more flexible, with a higher cap, a higher asset ceiling, and — most importantly — partial credit for shorter holding periods. But the new rules also embed a sharp rate trap that punishes the wrong kind of early exit, and the transition rules draw a hard line between stock issued before and after the effective date.
If you hold founder shares, early-employee stock, or angel investments, the next few years of corporate decisions — when to issue new shares, whether to recapitalize, how to structure secondary sales — will determine whether you fully capture the new benefits or accidentally leave them on the table.
What Changed on July 4, 2025
Three numbers tell most of the story.
The per-issuer cap rose from $10 million to $15 million. This is the per-shareholder, per-issuer limit on the gain you can exclude. The greater-of formula still applies — you can exclude up to the greater of the dollar cap or 10 times your adjusted basis in the stock — so the $15 million floor matters most for shares acquired at low cost (founder shares with nominal basis, early option exercises). The cap will be indexed for inflation starting in 2027.
The aggregate gross asset ceiling rose from $50 million to $75 million. This is the corporate-level test: at the time the stock was issued and immediately after the issuance, the company's gross assets cannot exceed the ceiling. Raising the bar to $75 million means later-stage rounds at higher valuations can still mint QSBS, and it widens the universe of companies whose secondary sales can produce exclusion-eligible stock. This threshold is also inflation-indexed starting in 2027.
The five-year cliff became a three-year ramp. Under the old rules, stock had to be held for more than five years to qualify for any exclusion — one day short and you got nothing. The new tiered structure replaces the cliff with a graduated schedule:
- Three years: 50 percent of qualifying gain excluded.
- Four years: 75 percent excluded.
- Five or more years: 100 percent excluded.
All three changes apply only to stock acquired after July 4, 2025. Stock issued on or before that date stays under the pre-OBBBA rules — $10 million cap, $50 million gross asset ceiling, and the all-or-nothing five-year holding period.
The Three-Year Ramp Is Not Free Money
The tiered structure looks like a gift, and for many situations it is. But the statute layers in a punitive rate that reshapes the early-exit math.
For stock held three or four years, the portion of gain that is not excluded is taxed at 28 percent — not the standard 15 or 20 percent long-term capital gains rate. The 28 percent rate is the same rate that applies to collectibles and to the small portion of pre-2010 QSBS that was not fully excluded. It is meaningfully higher than the rate a normal long-term capital gain pays, and it eats into the apparent benefit of an early exit.
Here is the math on a clean $4 million gain, ignoring state taxes and the net investment income tax for clarity.
Exit at three years (50 percent exclusion):
- Excluded gain: $2,000,000 at 0 percent federal = $0
- Taxable gain: $2,000,000 at 28 percent = $560,000
- Effective federal rate on the full $4M: 14 percent
Exit at four years (75 percent exclusion):
- Excluded gain: $3,000,000 at 0 percent federal = $0
- Taxable gain: $1,000,000 at 28 percent = $280,000
- Effective federal rate on the full $4M: 7 percent
Exit at five years (100 percent exclusion):
- Excluded gain: $4,000,000 at 0 percent federal = $0
- Taxable gain: $0
- Effective federal rate on the full $4M: 0 percent
The takeaway: an extra year of patience moves the effective rate from 14 percent to 7 percent to 0 percent. If you can wait, the wait usually pays. The corollary is also important: a three-year exit at a 14 percent effective rate is still better than a normal long-term capital gain at 20 percent plus the 3.8 percent net investment income tax. Even the partial benefit is worth fighting for.
There is one piece of good news embedded in the new rules. The excluded portion of gain from the three-year or four-year tier is not treated as an AMT preference item. Under the old rules, partial exclusions from earlier 50 and 75 percent regimes triggered AMT preference treatment that clawed back some of the benefit for high-income taxpayers. The new tier skips that drag entirely, which makes the headline percentages real.
Why the July 4, 2025 Line Is a Wall, Not a Hyphen
The new and old QSBS regimes do not blend. They run in parallel, governed by the issuance date of the specific shares being sold.
If a founder received her common stock on incorporation in 2022, that block of shares is forever pre-OBBBA stock. A sale in 2030 — well after the new rules took effect — still uses the $10 million cap and requires more than five years of holding to qualify for any exclusion. There is no migration path that lets old stock simply opt into the new tier structure.
The statute anticipates the obvious workaround and blocks it. Anti-abuse provisions prevent taxpayers from exchanging or recapitalizing pre-OBBBA stock to convert it into post-OBBBA stock. A purely cosmetic restructuring — say, a recap that issues "new" shares in exchange for old ones with no real change in the business — will not refresh the issuance date. Genuine capital-raising transactions and other bona fide events are recognized, but the burden of demonstrating a non-tax purpose rests on the taxpayer.
This makes timing decisions surprisingly consequential. A new option exercise on July 3, 2025 produces pre-OBBBA stock; an exercise on July 5 produces post-OBBBA stock. A funding round closed in June 2025 issues pre-OBBBA preferred stock; an extension closed in August produces post-OBBBA shares. Within a single cap table, founders, employees, and investors can hold mixed-vintage blocks, each with its own rule set.
For most existing shareholders, the practical guidance is to track issuance dates carefully and treat each block separately when modeling exits.
How the Math Changes for Each Group
The same set of rules creates different planning calculus depending on what kind of stock you hold.
Founders
Founders typically receive common stock at incorporation with negligible basis. The greater-of cap means a founder with a $0 basis is limited by the dollar figure, so the move from $10 million to $15 million is a direct $5 million-per-issuer increase in exclusion capacity per founder.
For founders whose original shares predate July 4, 2025, the $10 million pre-OBBBA cap still applies to that original block. New equity grants — top-up grants, refresh grants, founder shares issued in a new entity — issued after the effective date qualify for the higher cap.
The tiered holding period is most valuable for founders who face acquisition offers in years three and four. Strategic acquirers do not always wait for sellers' tax timelines. The old all-or-nothing rule forced founders to either turn down early offers, negotiate awkward seller-side deferrals, or eat full capital gains tax. The new partial exclusion makes it possible to accept a year-three or year-four offer while still capturing meaningful federal tax benefit — albeit at the 28 percent residual rate that should factor into negotiated price.
Early Employees
Early employees usually acquire QSBS by exercising options. The QSBS clock starts at exercise, not at grant or vesting. This means employees who wait to exercise until close to a liquidity event capture little or no Section 1202 benefit.
The new rules sharpen the case for early exercise of ISOs and NSOs when the strike price is low and the AMT exposure manageable. Exercising five years (or three, or four) before a likely exit now produces tiered exclusion eligibility on the gain between exercise price and sale price.
For employees holding pre-OBBBA exercised stock, the original rules govern. For employees with vested but unexercised options sitting at low strike prices, the calculus tilts further toward exercising now and starting the clock — particularly if the company is plausibly going to remain under the $75 million gross asset ceiling for some additional time, leaving room for additional grants that would also produce QSBS.
Angel Investors
Angel investors typically receive preferred stock in seed and Series A rounds. Two of the OBBBA changes specifically benefit them.
First, the $75 million gross asset ceiling allows angels to invest in later rounds — a Series B or even C round of a company that has not yet crossed the higher threshold — and still produce QSBS. The pre-OBBBA $50 million cap had effectively cut off many later rounds.
Second, the tiered exclusion changes the holding-period risk of investing in companies with potentially short paths to acquisition. An angel writing a $100,000 check into a company that exits in four years can now bring home a 75 percent federal exclusion on the gain, rather than nothing. For diversified angel portfolios, this raises the expected after-tax return on the winners, particularly winners that exit quickly.
Angels with pre-OBBBA positions still operate under the old rules for that stock, with the $10 million cap and five-year cliff. Subsequent investments — including follow-on rounds in the same companies — that are issued after the effective date qualify for the new tier and the new caps.
Eligible Versus Ineligible Businesses
The OBBBA did not change which businesses qualify. Section 1202 still requires that the issuer be a domestic C corporation that uses at least 80 percent of its assets in the active conduct of a qualified trade or business. Tech, manufacturing, retail, most consumer businesses, and most B2B services qualify.
The excluded categories are the same as before:
- Health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, and any business whose principal asset is the reputation or skill of one or more of its employees.
- Banking, insurance, financing, leasing, investing, and similar businesses.
- Farming.
- Production or extraction of products covered by the percentage depletion rules.
- Hospitality businesses such as hotels, motels, and restaurants.
This list, often abbreviated as the "specified service trade or business" (SSTB) list with additions, has not shifted. Founders in excluded industries received no help from the OBBBA. A consulting firm or a law practice still cannot mint QSBS, regardless of structure or size. For taxpayers in borderline industries, the C-corporation conversion analysis turns heavily on whether the active trade or business will plausibly fall outside the excluded categories.
Stacking and Gifting Strategies Get More Powerful
Because the per-issuer cap applies per taxpayer, separate taxpayers can each hold a $15 million bucket of exclusion in the same company. This "stacking" technique was already well-known under the $10 million cap. The higher cap multiplies it.
The most common stacking structures involve non-grantor trusts. A founder can gift QSBS to a non-grantor trust for the benefit of a spouse or children. The trust is a separate taxpayer and gets its own $15 million cap. Multiple trusts — properly drafted and administered so that they are not treated as a single taxpayer under the multiple-trust rules — can multiply this further. A family with one founder and four well-designed non-grantor trusts could, in principle, exclude $75 million in aggregate gain from a single company.
The OBBBA expansion does not change how stacking works, but it makes each layer 50 percent more valuable. Founders who already have stacking structures in place benefit automatically on the post-OBBBA stock they hold or contribute. Founders who have not done this planning should evaluate it before any liquidity event becomes foreseeable; once a sale is reasonably likely, the gifting analysis becomes more complicated and the IRS scrutiny higher.
One pitfall to flag: the holding period rules for transferees. When QSBS is gifted, the donee tacks on the donor's holding period. This is helpful — the recipient is not starting from zero. But the issuance-date rule is unforgiving: post-gift, the stock retains the original issuance date, so a gift of pre-OBBBA stock does not magically become post-OBBBA stock in the donee's hands.
Practical Recordkeeping Matters
Section 1202 is one of the most documentation-heavy provisions in the code. Successful exclusions require evidence of every element: that the issuer was a C corporation at issuance, that the gross asset test was satisfied at the relevant times, that the business met the active-trade-or-business test, that the stock was acquired at original issuance, and that the holding period started on the right date.
The new mixed-vintage cap tables make this harder, not easier. A company issuing stock through 2026 and beyond will have shareholders holding pre-OBBBA and post-OBBBA blocks side by side. Issuer-level QSBS attestation letters — already common for series-stage companies — should distinguish blocks by issuance date and call out the gross asset position at each issuance.
For taxpayers, the records to keep for every QSBS-eligible block include: the issuance date, the exact form of acquisition (original issuance, exercise, conversion), the basis in the shares, the issuer's gross asset position at the time of issuance, and contemporaneous evidence of the active business test. When the time comes to sell, these records — not the headline rules — will determine whether the exclusion holds up on audit.
Bookkeeping during the holding years is often where these positions get won or lost. If you cannot show clean records of basis, exercise dates, and issuer correspondence by the time of a sale, the audit risk increases significantly. Plain-text, version-controlled records of equity transactions — option exercises, secondary purchases, gifts to trusts — pay for themselves in tax efficiency on a single qualifying exit.
What to Watch Going Forward
A few items remain in flux.
State conformity is uneven. Some states automatically follow federal Section 1202 changes, some require legislative action, and a handful — California and Pennsylvania among them — do not recognize the federal exclusion at all. The OBBBA changes have not yet been universally adopted at the state level, and high-tax states are particularly slow to conform. Founders in non-conforming states may save federal tax but still owe state capital gains tax on the same gain.
Regulatory guidance is still being written. The Treasury Department is expected to issue regulations addressing several edge cases — the precise scope of the anti-abuse rules for pre-to-post conversions, how the tiered holding period interacts with corporate reorganizations under Section 351, and how the partial exclusion works with the basis-multiple formula. Practitioners are operating from the statutory text and committee reports until the regulations land.
Inflation adjustments begin in 2027. The $15 million cap and $75 million gross asset ceiling are both indexed starting in 2027, which means each will rise modestly each year thereafter. For long-horizon planning, the real value of the exclusion grows automatically, which slightly favors patience over forced sales.
Keep Your Finances Organized from Day One
QSBS planning is a multi-year exercise. From the moment a founder forms a C corporation, every equity issuance, every option exercise, every gift to a trust, and every dollar of gross assets is potentially relevant to a future exclusion claim. Spreadsheets and scattered PDFs make this manageable for a year or two, then break down somewhere between Series B and an LOI.
Beancount.io provides plain-text accounting that makes founder and investor records transparent, version-controlled, and auditable — exactly the kind of trail that holds up when the IRS asks about issuance dates and basis tracking years after the fact. No vendor lock-in, no opaque database. Get started for free and keep your equity, basis, and entity-level records ready for the day they matter most.