Startup founders are compensated with a high-value exit as the ultimate reward for taking the risk. Nevertheless, unless well planned, a substantial amount of such a win may be lost to federal capital gains taxes.

The most potent historical shielding of these gains has been the so-called Section 1202, or the Qualified Small Business Stock (QSBS) exclusion. Navigating into 2026, it is not simply a yes, under the One Big Beautiful Bill Act (OBBBA), the tax-free cap actually has been increased, so long as you can successfully manoeuvre through the new so-called tiered requirements.

Has the OBBBA increased the $10 million exclusion limit for founders?

Yes. Although the limit of 10 million dollars has been the norm over the decades, the OBBBA has permanently clarified the per-issuer gain exclusion limit to 15 million dollars of stock issued after July 4, 2025. This sum is as well inflation indexed beginning in 2027. There are tax resolution law firm which can help these high-net-worth individuals.

The founders who were given their stock prior to the 2025 cutoff limit are still subject to the initial allocation of $10 million (or 10 times your basis, whichever is larger). This gives you a two-lane system in which your date of issue of stock will make your federal tax-free haven of 10 million or 15 million.

Do founders still have to wait five years to see tax benefits?

Among the most innovative changes in 2026, the very introduction of the tiered holding periods of stock issued after July 4, 2025, is to be provided. Section 1202 before was an all-or-nothing game; if you sold in any year four, you received 0% exclusion.

There is now much earlier access to partial benefits under the new OBBBA rules:

• 3+ Years: 50% gain exclusion.
• 4+ Years: 75% gain exclusion.
• 5+ Years: 100% gain exclusion.

This staged entry strategy will give founders the flexibility they badly need to enable an early secondary or principal acquisition, so a pre-year five time out will not be such an outright tax catastrophe anymore.

What are the "Red Line" requirements for a company to qualify in 2026?

The essence of the definition of a qualified small business is still rigid. In order to issue QSBS, your startup has to be a domestic C-Corporation (S-Corps and LLCs are ineligible). More so, there should never be a time when the company has a total gross assets totaling above 75 million (with a rise of the same above 50 million by the OBBBA), whether prior to your stock issue or just after it. Experienced IRS tax experts (former IRS tax agent, former auditor, and experienced lawyer for tax returns) who can help to meet the requirement that falls within the ‘red line.”

Most importantly, the 80 Active Business Test should be passed: the assets of the company must be utilized in some active trade or business at least 80 percent. When your startup reinvests in the ineligible industries, such as financial services, professional services (law/accounting), or hospitality, then all of your stock might have its QSBS exemptions.

Conclusion

Not only is section 1202 active in 2026, but it is stronger than ever. The OBBBA has increased founders to a higher limit of 15million and a generous graded holding period. Nonetheless, the nature of the gross asset test and the requirement of doing business actively is such that qualifying as a QSBS is achieved at incorporation and maintained annually thereafter.

In the case of founders, it is no longer just about achieving a 10 million gain but making sure that your corporate structure is set to hold on to every possible dollar that is legally allowed to you.