The Section 1202 QSBS OBBBA changes look generous on paper: a tiered holding period, a higher gain exclusion cap, a broader gross asset threshold. But the practical question for CPAs working with clients who hold qualified small business stock isn’t what the new rules offer — it’s which set of rules actually applies to the stock in hand.
The answer comes down entirely to one date: July 4, 2025. Stock issued on or before that date is governed by pre-OBBBA rules in full. Stock issued after it gets the expanded treatment. There’s no blending, no partial application, and no mechanism to convert existing holdings to the new framework.
Section 1202 QSBS OBBBA: Pre- vs. Post-OBBBA Full Comparison
All three OBBBA changes follow the same effective date logic. The rule that applies is determined by the stock’s issuance date, not the date of sale.
| Rule | Pre-OBBBA (issued on/before July 4, 2025) | Post-OBBBA (issued after July 4, 2025) | Governs |
|---|---|---|---|
| Minimum holding period | 5 years | 3 years | Issuance date |
| Gain exclusion at 3 years | None | 50% | Issuance date |
| Gain exclusion at 4 years | None | 75% | Issuance date |
| Gain exclusion at 5+ years | 100% | 100% | Issuance date |
| Per-taxpayer gain cap (flat) | $10M | $15M ($7.5M MFS) | Issuance date |
| Gross asset threshold | $50M | $75M | Issuance date |
One point worth noting on the gain cap: the 10x basis alternative still applies alongside the flat dollar cap for both regimes. Whichever figure is greater governs. The flat dollar amounts changed; the 10x basis calculation didn’t.
Inflation adjustments on the $15M cap and $75M gross asset threshold begin in 2027. For 2026, the figures above are fixed.
The 28% Rate Trap in Section 1202 QSBS OBBBA
This is where the tiered holding period creates a tax outcome many practitioners won’t anticipate. For post-OBBBA stock held at least three but fewer than five years, the exclusion is partial: 50% at three years, 75% at four years. The remaining gain — the portion not excluded — is taxed at 28%, not at the standard 15% or 20% long-term capital gains rate.
That 28% rate applies specifically to gains on Section 1202 QSBS OBBBA stock that don’t qualify for full exclusion. A taxpayer who exits at the three-year mark and excludes 50% of a $2 million gain still pays 28% on the remaining $1 million rather than the standard long-term rate. On a $1 million taxable gain, that’s a $280,000 federal tax bill versus $200,000 at the 20% rate.
The five-year full exclusion remains the cleanest outcome. Stock issued in the second half of 2025 hits the three-year mark in 2028 and the five-year mark in 2030. Clients who issued QSBS shortly after the OBBBA’s enactment have time to plan around this.
Eligibility Requirements: Unchanged Under Section 1202 QSBS OBBBA
The OBBBA changed three parameters. It left the five core eligibility requirements completely intact. All apply throughout the holding period regardless of when the stock was issued.
Section 1202 QSBS OBBBA: C Corporation Issuer Requirement
The issuing entity has to be a domestic C corporation at the time the stock is issued. S corporations, partnerships, and LLCs taxed as partnerships don’t qualify. Only equity issued after a valid conversion to C corporation status is eligible.
Original Issuance Requirement
The taxpayer has to acquire the stock at original issuance, in exchange for money, property, or services. Stock purchased on a secondary market doesn’t qualify, regardless of holding period.
Gross Asset Threshold
The corporation’s aggregate gross assets, both before and immediately after the stock issuance, can’t exceed the applicable threshold: $50 million for stock issued on or before July 4, 2025, and $75 million for stock issued after. Gross assets means cash plus adjusted basis of other property, not fair market value (except for contributed property, where FMV at contribution applies). All members of a parent-subsidiary controlled group are treated as one corporation.
Active Business Requirement
At least 80% of the corporation’s assets by value have to be used in the active conduct of a qualified trade or business. Section 1202(e)(3) excludes a specific list of service industries: health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, and brokerage services. Banking, insurance, financing, leasing, investing, farming, hospitality, and businesses whose principal asset is employee reputation or skill are also excluded.
Worth checking on every QSBS claim: does the issuer’s business activity actually fall outside the excluded categories? The list is longer than most practitioners expect.
Noncorporate Taxpayer
Only noncorporate taxpayers can claim the Section 1202 QSBS OBBBA exclusion. Individuals, trusts, and estates qualify. C corporations don’t.
What Doesn’t Change for Pre-OBBBA Stock
Clients holding QSBS issued on or before July 4, 2025 are entirely under the old Section 1202 QSBS OBBBA framework — the pre-OBBBA side — regardless of when they sell. That means the five-year minimum holding period, the $10 million flat gain exclusion cap (or 10x basis, whichever is greater), and the $50 million gross asset threshold.
The OBBBA includes no grandfather provision allowing pre-OBBBA stock to opt into the new rules. Section 1202(i) is also explicit that QSBS received in a Section 351 exchange or tax-free reorganization in exchange for pre-OBBBA stock retains pre-OBBBA treatment. Restructuring the holding doesn’t change the governing framework.
For clients holding pre-OBBBA stock approaching the five-year mark, the full 100% exclusion remains available under the original rules. Nothing about the OBBBA disturbs that.
CPE on Section 1202 QSBS OBBBA Rules
MasterCPE offers a course covering Section 1202 QSBS OBBBA rules and the changes in full detail. Access it through a MasterCPE unlimited subscription. MasterCPE is registered with NASBA as a sponsor of continuing professional education on the National Registry of CPE Sponsors.