QSBS §1202 for the American founder: why timing decides everything

The concept

§1202 of the Internal Revenue Code is one of the most generous breaks in the U.S. tax code. On a sale of qualified small business stock (QSBS), a founder or early investor can exclude a large part — and in the best case, all — of the capital gain from federal tax. Enacted in 1993 and strengthened several times since, it was expanded more in July 2025, through the One Big Beautiful Bill Act (OBBBA), than in its entire prior history.

The logic is simple. If, at the time the stock was issued, the company was a U.S. C-corporation with gross assets below a threshold, carrying on an active business in a non-excluded field, and the investor received the shares at original issuance and held them long enough, then the gain on sale falls outside federal tax — in whole or in part. Sitting alongside it is §1045, which allows the gain to be rolled into new QSBS without breaking the benefit.

For an American living in the United States, this is a founder's dream in its purest form. But the moment that same person becomes a tax resident of another country, the picture inverts: §1202 is an exclusion from U.S. tax, and it says nothing to the country of the new residence. So the whole §1202 story for private capital is a story about timing.

History and evolution

§1202 arrived in the Omnibus Budget Reconciliation Act of 1993 and initially excluded only half the gain on a five-year holding. During the crisis, the American Recovery and Reinvestment Act of 2009 raised the bar to 75% for stock acquired from February 2009, and the Small Business Jobs Act of 2010 took the exclusion to a full 100% — for issuances after 27 September 2010. That hundred-percent break was extended several times until the PATH Act of 2015 made it permanent.

Until 2025 the structure held at a single level: 100% exclusion, a $10 million cap with no indexing, a $50 million asset threshold and a hard five-year holding requirement. OBBBA 2025 became the largest revision of the provision in thirty years — adding early tiers by holding period, lifting the cap to $15 million with indexation and widening the field of eligible companies to $75 million of assets, making the break reachable for larger start-ups too.

How the exclusion works

The baseline rule for stock issued on or before 4 July 2025: held for at least five years, the gain is fully excluded — 100% for stock acquired after 27 September 2010. Earlier issuances carried 50% and 75% tiers, but those too were tied to the acquisition date rather than the length of holding. The excluded amount is capped per issuer: under §1202(b)(1) it is the greater of the applicable dollar limit for the year and ten times the aggregate adjusted basis of that issuer's stock disposed of during the year. The dollar limit itself turns on when the stock was acquired — $10 million for stock acquired on or before 4 July 2025, $15 million for stock acquired after it. For new issuances the formula therefore reads "the greater of $15 million or ten times basis", and it is that figure which is indexed, for tax years beginning after 2026.

Who and what must qualify

The issuer must be a domestic U.S. C-corporation (not an S-corp, LLC or partnership), with gross assets of no more than $50 million at and immediately after issuance; for stock issued after 4 July 2025 the threshold is $75 million. At least 80% of assets must be used in an active qualified business. Service fields are excluded — health, law, accounting, consulting, financial and brokerage services, the performing arts — as are banking, insurance, mining, farming and the hospitality business. The investor must receive the shares at original issuance in exchange for money, property or services, not buy them on the secondary market.

What OBBBA 2025 changed

The One Big Beautiful Bill Act, signed on 4 July 2025, rewrote §1202 for stock issued after that date. A tiered schedule keyed to the holding period appeared: 50% exclusion at three years, 75% at four, and the full 100% from five years. That is a fundamental departure from the old 50/75/100, which depended on when the stock was acquired rather than how long it was held. For new issuances, partial relief became available well before the five-year mark. An early sale has its price: the taxable slice of the gain (half at three years, a quarter at four) is taxed at a rate of up to 28% instead of the usual 20% for long-term gain, plus the 3.8% NIIT. Only a five-year holding still delivers the full, clean exclusion.

The new thresholds

The per-issuer cap rose from $10 million to $15 million, and from 2027 the amount is adjusted annually for inflation — the indexation applies to tax years beginning after 2026. The company's gross-assets threshold was lifted from $50 million to $75 million, indexed from the same year — more companies now fit within the small business definition. Both parameters apply only to stock issued after 4 July 2025.

Old stock stays on the old rules

Issuances on or before 4 July 2025 live under the prior rules: 100% at five years, a $10 million cap with no indexing, a $50 million asset threshold. The holding period cannot be restarted to reach the new three- and four-year tiers; swapping old shares for new ones to capture better terms generally just destroys QSBS status. 4 July 2025 is the watershed between the two regimes.

Stacking: multiplying the benefit through trusts

The §1202 cap is computed per taxpayer — and that is what stacking exploits. A founder gifts part of the QSBS to several non-grantor trusts; each such trust is a separate taxpayer with its own cap ($10 million or $15 million depending on the issuance date). At exit the deal closes through several holders, and the aggregate excluded gain is a multiple of a single cap. The key condition is that the structure must be built in advance: the gift has to occur before the sale becomes legally binding, or the IRS will see an assignment of income and the technique fails.

Timing decides twice. Inside the U.S. — because both the five-year clock and stacking through non-grantor trusts require advance steps: waiting out the period and gifting the trusts before signing a binding agreement. At the cross-border level — because the benefit works only while the holder is a tax resident of the U.S. or another jurisdiction that does not tax capital gains.

§1045: the roll-over when five years are not up yet

If QSBS has to be sold before five years, the gain need not be recognized immediately — it can be rolled under §1045 into new QSBS: with the original shares held for more than six months, the investor has 60 days to reinvest the proceeds into other qualified small business stock. The holding period, in effect, continues, and the five-year mark can be reached on the new shares. A working tool for the serial founder who exits one project and enters the next.

Expatriation and the tax on the recipient

A U.S. exit breaks the timing differently from a mere move abroad. For a covered expatriate the section 877A deemed sale falls the day before the expatriation date and does not wait for the five-year §1202 clock to mature; whether the exclusion reaches a deemed sale at all is a separate question to settle before the exit. The thresholds and the sequence are in US expatriation and exit tax.

The transfer of the shares themselves is friendlier: §1202(h)(1)–(2) treats the recipient as having acquired the stock in the same manner as the transferor and carries the holding period across, so qualification and access to the exclusion survive a gift or a transfer at death. Where the transferor is a covered expatriate, though, the recipient picks up a bill of their own: §2801 charges a U.S. recipient at the top rate of the §2001(c) table — 40% today — on the market value above the $19,000 annual exclusion, and the tax paid does not increase basis. The income-tax relief survives in full, the transfer tax is charged in full, and neither offsets the other.

Stacking sits in the same place. A trust built to multiply the cap stops being a neutral vehicle once the settlor expatriates: later contributions from a covered expatriate are covered gifts, and the domestic trust itself becomes the taxpayer. The order of the steps matters more than the steps: gift first, hold out the period, exit afterwards — not the other way round. The regime is set out in Section 2801: gifts and bequests from covered expatriates.

Application

For an American founder or early investor who remains a U.S. tax resident, §1202 is pure savings: with a correct C-corp issuer structure and a sufficient holding period, a large part — often all — of the exit gain falls outside federal tax, and stacking through trusts scales the effect far beyond a single cap. For private capital with an international footprint, the value of §1202 lies in a window: realizing the built-in gain is sensible while the person is still a U.S. resident and has not come under another country's capital gains tax. After a move to a high-tax jurisdiction, the same sale produces local tax on the entire gain — with no credit to offset it.

Risks

There are purely American risks too. QSBS status is easy to lose: the wrong legal form, breaching the asset threshold at issuance, an excluded line of business, redemptions by the issuer in forbidden windows. Stacking holds up only with impeccable gift timing and genuinely independent trusts — hasty or sham arrangements get recharacterized by the tax authority. The cost of a mistake here is measured in millions of excluded gain, which is why the structure is checked before the deal, not after. Genuine independence is evidenced by the ordinary set: an independent trustee, no instructions from the settlor beyond a non-binding letter of wishes, dated minutes of the trustee's decisions, and real distributions made on the trustee's decision rather than on request.

State law is a separate layer. §1202 is a federal provision, and a state follows it only where the state has said so. California does not: its Publication 1001 states the point flatly — federal law allows deferral and exclusion under §1045 and §1202, and "California law does not conform" — so an exclusion claimed on the federal return comes back into the state base through California Schedule D. For a founder changing state before an exit that line is the equal of the federal question, and the rule is checked against the particular state's own code as of the sale date rather than against the federal text.