QSBS After the OBBBA: What Founders and Early Employees Must Know About the 2025 Rewrite of Section 1202

For years, qualified small business stock has operated under a simple but unforgiving rule: hold for five years or forfeit every dollar of the exclusion. That framework shaped how founders structured equity, how early employees thought about liquidity, and how advisors modeled exit scenarios. The One Big Beautiful Bill Act, enacted July 4, 2025, changed the calculus materially — but only for stock issued after that date. Understanding exactly what changed, what did not, and what planning moves are now available is essential for any founder, CFO, or early employee approaching a liquidity event.

What Changed: The OBBBA Rewrites Section 1202 for Post-July 4, 2025 Stock

The One Big Beautiful Bill Act was enacted on July 4, 2025, as Public Law 119-21, and it represents the most significant revision to Section 1202 since the provision was made permanent. The critical threshold for every QSBS analysis going forward is the acquisition date.

The OBBBA's changes apply only to stock issued or acquired after July 4, 2025. Stock acquired on or before that date remains governed entirely by prior law: a five-year holding period before any gain exclusion applied — an all-or-nothing cliff with no partial benefit for shorter holds — and a per-issuer cap equal to the greater of $10 million or 10 times the taxpayer's adjusted basis in the stock disposed of. If you hold pre-July 4, 2025 shares, none of the new tiered exclusions, higher caps, or expanded gross-assets ceiling apply to you.

The diagram below illustrates this bifurcation:

The New Tiered Holding Period: From All-or-Nothing Cliff to Graduated Exclusion

The most operationally significant change in the OBBBA is the replacement of the five-year cliff with a graduated, three-tier exclusion schedule for post-July 4, 2025 QSBS. Under the new structure, a taxpayer who holds qualifying stock for at least three years (but less than four) is eligible for a 50% exclusion of eligible gain. A holding period of at least four years (but less than five) qualifies for a 75% exclusion. Five years or more continues to deliver the full 100% exclusion.

This is a structural shift, not a marginal one. Under prior law, a founder who sold at year four received zero federal exclusion benefit. Under the OBBBA, that same timeline — applied to post-July 4, 2025 stock — produces a substantial exclusion. The planning implications for founders who anticipate a strategic sale or secondary transaction in the three-to-five-year window are significant.

Tax Cost of Stopping Short: The 28% Rate and NIIT Exposure

The tiered structure creates real optionality, but the tiers are not economically equivalent, and treating them as interchangeable is a planning error. Gain that is not excluded under the 50% or 75% tiers is taxed at the 28% capital-gains rate prescribed by Section 1202 — not the standard long-term capital-gains rate that applies to most appreciated assets. Additionally, the non-excluded portion of QSBS gain may be subject to the 3.8% net investment income tax under Section 1411 for taxpayers above the applicable income thresholds.

The combined effect is material. At the 50% tier, half of the gain faces a potential combined rate of 28% plus 3.8% NIIT — a meaningfully higher burden than the rate applicable to the excluded half, which is zero. A three-year exit is therefore materially more expensive on an after-tax basis than a five-year exit, even though both now qualify for some level of federal exclusion. Founders and early employees who have flexibility over exit timing should model the after-tax proceeds at each tier before committing to a transaction timeline.

The partial tiers also carry a wrinkle the post-2010 fully-excluded stock does not. A portion of the gain excluded under the 50% and 75% tiers is treated as an alternative minimum tax preference item under Section 57(a)(7), which can pull part of the apparent exclusion back into income for taxpayers otherwise in AMT territory. The 100% tier is not subject to this preference. For high-income taxpayers running an AMT calculation, this is another reason the five-year tier is materially better than the three- or four-year alternatives — not just a higher exclusion percentage, but a cleaner one.

Bigger Caps: The $15 Million Per-Issuer Exclusion and $75 Million Gross-Assets Ceiling

The OBBBA made two additional changes that expand the universe of taxpayers and companies that can benefit from Section 1202.

First, the per-issuer gain-exclusion cap increased from $10 million to the greater of $15 million or 10 times the taxpayer's adjusted basis in the stock. This matters most for founders and early employees with low basis — the 10x basis alternative was already generous for that group — but the $15 million floor is now the relevant benchmark for investors with higher basis positions. The $15 million figure is indexed for inflation beginning in 2027, so the real value of the cap will not erode over time.

Second, the aggregate gross-assets ceiling for a company to qualify as a qualified small business at the time of stock issuance rose from $50 million to $75 million. This change extends QSBS eligibility to companies that were previously too large to issue qualifying stock — a meaningful expansion for growth-stage companies that have raised multiple rounds and are approaching or have recently crossed the old $50 million threshold. The $75 million ceiling is indexed for inflation beginning in 2027.

Taken together, these two changes mean that more companies can issue QSBS, and more gain per taxpayer can be sheltered when they do.

Core Qualification Tests That Did Not Change

The OBBBA expanded the benefits of Section 1202, but it did not relax the foundational qualification requirements. These tests remain unchanged and must be satisfied for any stock — pre- or post-July 4, 2025 — to qualify.

The issuer must be a domestic C corporation at the time of stock issuance and throughout substantially all of the taxpayer's holding period. This requirement is categorical: QSBS treatment is not available for stock in S corporations, LLCs, or partnerships. Entity structure is not a technicality — it is a threshold condition. Founders who operate through pass-through entities and are considering a conversion to C-corporation status should understand that the holding period clock for QSBS purposes begins at original issuance of qualifying C-corporation stock, not at the date of conversion.

The stock must be acquired at original issuance in exchange for money, property, or services. Secondary-market purchases do not qualify, regardless of how long the buyer holds the shares thereafter.

Finally, the issuing company must satisfy the active-business requirement throughout the taxpayer's holding period, meaning that at least 80% of the company's assets must be used in qualified trades or businesses. Certain industries — including financial services, hospitality, and professional services in specified fields — are excluded from the active-business test. Companies in software, technology, and manufacturing generally satisfy this requirement, but the analysis should be confirmed at issuance and monitored through the holding period.

Planning Moves to Execute Before Year-End

The OBBBA creates a planning window that recurs as each year-end approaches. Two categories of action are worth prioritizing.

Start the holding-period clock on new QSBS. Founders and early employees who receive or purchase new QSBS sooner rather than later begin the three-year partial-exclusion clock earlier, reaching the 50% tier three years from the issuance date. For companies planning a Series A, a bridge round, or an equity compensation grant, accelerating the issuance date — while ensuring all qualification tests are met — can meaningfully improve the after-tax outcome of a future liquidity event.

Evaluate Section 1045 rollover opportunities. A taxpayer who sells QSBS before reaching a holding-period threshold can preserve QSBS treatment by reinvesting the proceeds in new QSBS within 60 days of the sale. This rollover mechanism under Section 1045 allows the taxpayer to carry the QSBS character into the replacement stock, effectively restarting — or in some cases continuing — the holding period analysis. A critical prerequisite: the original QSBS must have been held for more than six months before the sale. The 60-day reinvestment window is strict, and the replacement stock must independently satisfy all Section 1202 qualification requirements. For founders navigating a secondary transaction or an early acquisition where the full five-year hold is not achievable, a Section 1045 rollover into a new qualifying investment can preserve the federal exclusion benefit that would otherwise be lost.

Beware Section 1202(i) on restructurings of old stock. Section 1045 lets a taxpayer roll forward QSBS character; Section 1202(i) runs the opposite way for old-rules stock. Exchanging pre-July 4, 2025 QSBS for new stock in a Section 351 contribution or a Section 368 reorganization preserves the pre-OBBBA treatment — the $10 million / 10-times-basis cap and the five-year cliff — when the replacement stock is eventually sold. The transaction does not upgrade old-rules stock to the tiered exclusion or the higher cap. Founders considering a holding-company restructuring or a reorganization that would technically issue new shares should not assume the swap restarts the clock under the OBBBA rules; in most cases the old treatment travels with the replacement stock.

Stack the per-taxpayer exclusion through gifting. The $15 million cap (or the 10-times-basis alternative) applies per taxpayer, per issuer. Founders who expect gain materially above the cap can gift QSBS to family members or to non-grantor trusts before a liquidity event, multiplying the available exclusion across additional taxpayers. The gift must tack the holding period and carry the QSBS character correctly under Section 1202(h), and trust structuring has to avoid grantor-trust attribution back to the donor — but for high-net-worth founders facing a clearly capped outcome under a single personal exclusion, this is one of the highest-leverage planning moves available.

Both strategies require careful coordination with legal and tax counsel before execution. The qualification analysis is fact-specific, and errors in structuring — particularly around the original-issuance requirement and the active-business test — can disqualify stock retroactively.

State Tax Conformity: The Hidden Variable in Every QSBS Analysis

Federal QSBS planning does not end at the federal return. State conformity to the Section 1202 exclusion varies substantially by jurisdiction and must be confirmed separately for every taxpayer — it does not flow automatically from the federal exclusion.

A substantial number of states do not conform to the federal Section 1202 exclusion, meaning residents of those states owe state income tax on the full gain even when the federal exclusion applies in its entirety. For a founder in a high-tax non-conforming state, state income tax on the non-excluded gain can materially erode the net benefit of even a full federal 100% exclusion. The effective combined rate — federal zero plus state marginal rate on the full gain — can be significant depending on the jurisdiction and the size of the gain.

State conformity analysis is not a one-time exercise. States periodically update their conformity positions, and a state that conformed to Section 1202 in a prior year may not conform to the OBBBA amendments. Every QSBS analysis should include a current, jurisdiction-specific conformity review as a standard component of the planning process.

The OBBBA's rewrite of Section 1202 is the most consequential change to QSBS in a generation — but its benefits are not self-executing. The bifurcation between old-rules and new-rules stock, the tax cost of stopping short of the five-year tier, the expanded but still-bounded caps, the unchanged qualification tests, and the state conformity overlay all require deliberate analysis. Founders, CFOs, and early employees who act before year-end to start the holding-period clock on new QSBS — and who build a complete picture of their federal and state exposure — will be best positioned to capture the full value of what Congress has made available.