Qualified Small Business Stock (QSBS): Section 1202 Guide

Section 1202 Qualified Small Business Stock (QSBS): A Guide to the Gain Exclusion

The gain exclusion under Section 1202 is one of the most powerful tax incentives in the Internal Revenue Code. For founders, early employees, and investors in qualifying C corporations, qualified small business stock (QSBS) can provide an opportunity to exclude millions of dollars of capital gain from federal tax. Permanently.

Innovation and investment are foundational to the U.S. economy, and the tax code has long encouraged investment in emerging businesses through this provision. Enacted in 1993, Section 1202 was designed to channel capital into small, domestic C corporations by offering a meaningful reward at exit: a partial, and, eventually, full exclusion of gain on the sale of qualifying stock. Over three decades, the exclusion percentage climbed from 50% to 75% to 100%, but the underlying framework remained largely intact.

That changed in 2025. The One Big Beautiful Bill Act (OBBBA) marked the most significant update to Section 1202 since its enactment, expanding eligibility, introducing partial exclusions for shorter holding periods, and raising the dollar caps. For practitioners and taxpayers alike, the issuance date of the stock is now central to determining which version of the rules, and which benefits, apply.

What Qualifies as QSBS? The Core Requirements

The following requirements apply to all QSBS, regardless of when the stock was issued:

• The stock must be issued by a domestic C corporation to a non-corporate taxpayer in an original issuance, in exchange for cash, property, or services.
• At least 80% of the corporation’s assets must be used in a qualified trade or business during substantially all of the taxpayer’s holding period.
• Certain businesses are excluded from QSBS treatment, including service businesses; trades or businesses whose principal asset is the skill or reputation of one or more employees; banking and financial services; farming; hotels and restaurants; and businesses involved in the production or extraction of natural resources.

The Gross Asset Test

The corporation’s gross assets must fall below a statutory threshold immediately before and immediately after the stock is issued. That threshold depends on the issuance date:

How the Section 1202 Gain Exclusion Works

If the stock qualifies as QSBS, a non-corporate taxpayer’s sale or exchange may be eligible for the gain exclusion. The mechanics, holding period, exclusion percentage, and dollar cap depend on when the stock was issued.

Stock Issued Before July 5, 2025: The Original Framework

The taxpayer must hold the QSBS for at least five years to qualify. The percentage of gain that may be excluded is tied to the date the stock was acquired:

The maximum gain exclusion per issuer, per taxpayer, is the greater of $10 million or 10 times the stock’s aggregate tax basis.

Stock Issued After July 4, 2025: The OBBBA Updates

The 100% exclusion for stock held five years or more remains in place, but the OBBBA introduces partial exclusions for mid-term holds, a meaningful change for founders and investors who exit on a faster timeline:

The maximum gain exclusion per issuer, per taxpayer, is now the greater of $15 million or 10 times the stock’s aggregate tax basis, with the $15 million cap indexed for inflation.

Advanced QSBS Planning Opportunities

In the right circumstances, founders and investors can layer additional Section 1202 strategies to maximize the benefit. While a full discussion is beyond the scope of this article, common opportunities include:

• Section 1045 rollovers. For fast-paced growth ventures where the five-year holding period isn’t met, Section 1045 may allow a taxpayer to defer the gain by rolling it into other qualifying stock.
• Entity restructuring. For companies initially formed as an LLC or S corporation, a thoughtful entity-level restructure can position the business to qualify for the QSBS gain exclusion upon a future exit.
• Gift and estate planning. For founders focused on efficient wealth transfer, gifting QSBS to family members or trusts can multiply the exclusion across multiple taxpayers, a meaningful lever for next-generation planning.

The Bottom Line

Permanent exclusion of income from federal tax is rare in the Internal Revenue Code. Section 1202 is one of the few provisions that delivers it, and whether the stock at issue dates back to the original 1993 framework or falls under the post-2025 rules, the analysis demands careful attention to facts, timing, and structure.

If you’re a founder, investor, or business owner who may be sitting on, or planning toward, QSBS, the time to map out your Section 1202 strategy is well before the exit, not after. As with other aspects of M&A readiness, early planning can provide more options and help avoid surprises during a future transaction.

Reach out to your WG tax advisor to talk through how the rules apply to your specific situation.