It shortens the wait for a partial exclusion, raises the dollar cap on excluded gain, and lets larger companies still issue qualifying stock. For founders, employees, and investors, the takeaway is simple: the QSBS benefit just got bigger, but only for the right stock acquired at the right time.

This article breaks down exactly what changed, who benefits, and the crucial distinction between stock acquired before and after the effective date. For the full background on how the exclusion works, see our complete guide to QSBS and Section 1202.

What changed in the 2025 QSBS rules

Three changes stand out, and each applies to QSBS acquired after July 4, 2025.

1. A new tiered holding period

Under prior law, you had to hold QSBS for more than five years to exclude any gain at all. Sell at four years and eleven months, and you got nothing. The 2025 law replaces that all-or-nothing rule with a tiered schedule for newly acquired stock:

This is a meaningful shift for anyone who may need liquidity before the five-year mark. A partial exclusion at three or four years is now possible where none existed before.

2. A higher per-issuer cap: $15 million

The exclusion has always been capped, per company, at the greater of a dollar figure or ten times your adjusted basis in the stock sold that year. The 2025 law raises the dollar figure from $10 million to $15 million, with inflation adjustments scheduled to begin after 2026. For a founder with a large exit and a low basis, that is up to $5 million of additional gain potentially excluded per company.

3. A higher gross-assets ceiling: $75 million

To issue QSBS, a company’s aggregate gross assets generally cannot exceed a ceiling at the time of issuance. The 2025 law raises that ceiling from $50 million to $75 million. The practical effect is that somewhat larger, later-stage companies can now issue qualifying stock, expanding the universe of investments that can produce QSBS.

Old stock versus new stock: which rules apply to you

The single most important question after the 2025 changes is when you acquired your stock. The new rules apply only to QSBS acquired after July 4, 2025. Stock acquired on or before that date keeps the prior rules.

If you hold stock from an earlier investment, you do not lose anything; your stock continues under the terms that applied when you acquired it, and a full 100% exclusion may still be available if you acquired it after September 27, 2010 and hold it more than five years. The new, more generous terms are simply not retroactive.

Who benefits most from the 2025 changes

The expansion is most valuable to founders and early investors in companies formed or capitalized after the effective date, employees who receive newly issued equity in qualifying C corporations, and investors who want the option of a partial exclusion if an exit comes before year five. It also helps venture-stage companies that have grown past the old $50 million asset ceiling but remain under $75 million, because they can once again issue QSBS.

What has not changed

The core structure of Section 1202 is intact. The issuer still has to be a domestic C corporation. The company still has to conduct an active qualified trade or business, and the same excluded fields, including health, law, consulting, financial services, and businesses built on the reputation or skill of key employees, still fall outside the benefit. Stock still generally has to be acquired at original issuance. And the redemption anti-abuse rules still apply. The 2025 law made the benefit larger; it did not make it easier to qualify.

Two cautions that are easy to overlook

California still does not conform

None of this changes California’s treatment. California does not follow Section 1202, so a California resident can qualify for a full federal exclusion under the new rules and still owe California tax on the entire gain. We cover this in our article on California and QSBS.

A bigger benefit invites more scrutiny

As the dollars excluded grow, so does the IRS’s interest in making sure every requirement is actually met. Larger exclusions on newly expanded rules are exactly the kind of position examiners look at closely. If you plan to rely on the 2025 rules, build your documentation now, not after a notice arrives. Our article on how QSBS claims are audited and defended explains what that record should include.

Frequently asked questions about the 2025 QSBS changes

When did the 2025 QSBS changes take effect?

The new rules apply to QSBS acquired after July 4, 2025. Stock acquired on or before that date remains subject to the prior rules.

Do the new rules apply to stock I already own?

No. The tiered exclusion, the $15 million cap, and the $75 million gross-assets ceiling apply only to stock acquired after July 4, 2025. Earlier stock keeps the rules that applied when you acquired it.

Can I now exclude gain after only three years?

For stock acquired after July 4, 2025, yes, a 50% exclusion is available at three years and 75% at four years, with the full 100% at five years. Older stock still generally requires more than five years for any exclusion.

How much can I exclude under the new per-issuer cap?

For qualifying stock acquired after July 4, 2025, the cap per company is the greater of $15 million or ten times your adjusted basis in the stock sold that year.

Does California follow the new QSBS rules?

No. California does not conform to Section 1202, so the 2025 federal changes do not reduce California tax on the gain.

Disclaimer. This article is for general information only and is not legal or tax advice. Reading it does not create an attorney-client relationship. Tax results depend on your specific facts. Past results do not guarantee future outcomes. Consult a qualified attorney about your situation before acting.