From Equity to Exit: Qualified Small Business Stock & Section 1202 Made Simple

If you’re a founder, early employee, or angel investor holding stock in a small company, Section 1202 of the Internal Revenue Code could save you millions in taxes. Qualified small business stock (QSBS) lets eligible shareholders exclude up to 100% of their federal capital gains when they sell.

Here’s what qualifies, how the exclusion works, and how to plan around it.

• QSBS can eliminate federal capital gains tax on qualifying stock sales, subject to IRS limits.
• Eligibility hinges on specific requirements: the company must be an active domestic C corporation, and its gross assets must not exceed $50 million (for shares issued on or before July 4, 2025) or $75 million (for shares issued after July 4, 2025) at the time the stock is issued.
• You generally need a 5+ year holding period for the 100% exclusion, though QSBS issued after July 4, 2025 may qualify for partial exclusions at 3 and 4 years.
• California does not conform to Section 1202, so Bay Area founders and employees still owe state capital gains tax on QSBS sales.
• 2025 legislation expanded the benefit with higher caps and a new phased exclusion structure for recently issued shares.

QSBS stands for qualified small business stock. It refers to shares in a company that meet a specific set of criteria under Section 1202 of the IRC. Congress created this provision to encourage investment in small businesses by offering a powerful incentive: exclude some or all of your capital gains from federal taxes when you sell.

The potential benefit is significant. If your stock qualifies, you can exclude the greater of $10 million (or $15 million for QSBS issued after July 4, 2025) or 10x your adjusted basis per issuing company. For founders and early investors who bought in at low valuations, the 10x basis rule often provides the larger cap. These numbers were recently raised under 2025 legislative changes (more on this later).

For QSBS eligible for the 100% exclusion, the excluded gain is generally not subject to federal capital gains tax, the 3.8% net investment income tax (NIIT), or alternative minimum tax (AMT). For taxpayers in the top bracket, this can eliminate a combined federal tax rate of up to 23.8% on the excluded gain. Any gain that isn’t excluded (for example, amounts above the cap) remains taxable and may be subject to NIIT.

Not every small business stock sale gets this treatment. Both the company and the shareholder need to clear several hurdles.

Company Requirements

The business must be an active domestic C corporation at the time the shares are issued. Gross assets cannot exceed $50 million for shares issued on or before July 4, 2025, or $75 million for shares issued after July 4, 2025, measured at issuance. The company must also operate a qualified trade or business, which excludes certain industries: financial services, farming, mining, and professional services like law, consulting, and health care. See IRC §1202(e)(3) for the full list.

The IRS requires that at least 80% of the company’s assets be used in the active conduct of a qualified business during substantially all of the shareholder’s holding period.

Shareholder Requirements

You must be a non-corporate taxpayer, meaning individuals, trusts, and partnerships where the partners are individuals. The shares must have been acquired at original issuance, not on the secondary market, and you must have received them in exchange for cash, property, or services rendered to the company.

The Five-Year Clock

To claim the full exclusion, you need to hold the stock for at least five years from the date of issuance. Sell before that, and the exclusion doesn’t apply (though Section 1045 may offer a workaround, which we’ll cover shortly).

The percentage of gain you can exclude depends on when your stock was issued. Stock issued on or before July 4, 2025 follows the long-standing acquisition-date rules below. Stock issued after July 4, 2025 follows new holding-period rules under Public Law 119-21.

Let’s say Maya founded a SaaS company in 2019 as a C corporation. She received founder shares with an adjusted basis of $50,000. After seven years of growth, she sells the company and her shares are worth $8 million. Because her shares met QSBS holding requirements, Maya excludes the entire $7.95 million gain from federal taxes. Without QSBS, she’d owe roughly $1.89 million in federal capital gains and NIIT alone.

The catch? California and a small handful of states (often cited include Pennsylvania, Mississippi, and Alabama) do not conform to Section 1202. If Maya lives in San Francisco, she still owes California’s top rate on that gain. Planning for California tax strategies alongside federal QSBS benefits is essential for CA shareholders.

Founder exit: The Maya example above illustrates the classic case. A founder incorporates as a C corp, builds the business, and sells after the five-year holding period. The entire gain (up to the exclusion cap) avoids federal taxation.

Early employee stock: Let’s say Raj joins a startup and receives 10,000 shares of common stock valued at $2 per share as part of his equity compensation package. He pays ordinary income tax on the $20,000 at the time of receipt. Five years later, the company is acquired at $50 per share. Raj’s gain of $480,000 qualifies for the full QSBS exclusion. He owes zero federal capital gains tax on the appreciation.

Angel investor: Priya invests $500,000 in a seed-stage C corporation. The company grows and is eventually acquired for a valuation that puts her shares at $5 million. Her $4.5 million gain is fully excluded under Section 1202. Her 10x basis cap would be $5 million, so she’s well within the limit.

Without QSBS, each of these scenarios would face a 23.8% federal tax rate (20% long-term capital gains plus 3.8% NIIT). For Priya, that’s over $1 million in federal taxes avoided.

Smart planning can amplify the QSBS benefit considerably. These strategies are worth discussing with your advisor.

Section 1045 rollover

If you sell QSBS that you’ve held for at least six months (but less than five years), you can defer the gain by reinvesting the proceeds into new QSBS within 60 days. This resets the clock on the new investment while deferring the tax on the old one.

Stacking the exclusion

The $10 million (or $15 million for QSBS issued after July 4, 2025) cap applies per taxpayer, per issuing company. By gifting shares to family members before a sale, each recipient can potentially claim their own exclusion. A founder who gifts stock to a spouse and two adult children could potentially shelter up to $40 million in gains (or $60 million under the new rules).

However, timing matters. If a sale is already effectively negotiated or highly certain to occur, the IRS may challenge the strategy under the anticipatory assignment of income doctrine. In that case, the transfer could be treated as a gift of the right to receive sale proceeds rather than a gift of stock, and the original owner could remain taxable on the gain.

For this reason, QSBS gifting strategies are generally most effective when implemented well before a potential liquidity event.

Entity structuring

Partnerships and certain trusts can hold QSBS, and the exclusion flows through to the individual partners or beneficiaries. This creates opportunities to multiply exclusion caps through thoughtful entity planning.

Estate planning opportunities

Transferring QSBS before a significant increase in value can also reduce future estate taxes. By gifting shares while valuations are still low, future appreciation occurs outside the founder’s taxable estate and can make more efficient use of lifetime gift and estate tax exemption. For founders of rapidly growing companies, coordinating QSBS and estate planning well before a potential liquidity event can meaningfully reduce both income and estate taxes.

2025 legislative changes to know

As stated earlier, for shares issued after July 4, 2025, the gross asset cap rises to $75 million, the per-shareholder exclusion cap increases to $15 million, and a new phased exclusion structure applies: 50% exclusion at 3 years, 75% at 4 years, and 100% at 5 years. This phased approach in the Big Beautiful Bill gives shareholders partial benefits even if they need to sell before the full five-year mark.

Even sophisticated investors trip over these issues. Avoiding them requires awareness and documentation from day one.

S corp status disqualifies you. Only C corporations generate QSBS. If your company operated as an S corp when it issued your shares, those shares don’t qualify, period. Companies that later convert to C corp status face nuanced rules about which shares qualify and when.

The asset threshold is measured at issuance. If the company’s gross assets were under $50 million when you received your shares but grew past that mark afterward, your shares still qualify. But later investors who receive shares after the company crosses the threshold are out of luck.

The active business test is ongoing. The company must use at least 80% of its assets in qualified active business operations during substantially all of the holding period. Sitting on a pile of cash or investment assets can jeopardize QSBS status for all shareholders.

Stock redemptions can disqualify shares. Significant redemptions by the company (buying back stock from other shareholders) within certain windows around your issuance date can taint your shares. The IRS provides guidance on these rules in the Schedule D instructions.

Documentation gaps are costly. If you can’t prove QSBS status years later at the time of sale, you lose the exclusion. Get written confirmation from the company at issuance, including gross asset certifications and representations about qualified business activity.

QSBS is not just a line item on your tax return. It’s a planning tool that intersects with decisions about when to exercise options, when to sell, how to gift shares, and how to structure your overall portfolio. Getting it right means coordinating tax strategy with investment planning and estate considerations.

For founders approaching an exit, the difference between a well-planned QSBS strategy and an overlooked one can be seven figures. For early employees navigating equity compensation, understanding whether your shares qualify, and what steps to take now, shapes your entire financial trajectory.

Wondering about your own situation? Contact Summitry to discuss how QSBS fits into your broader financial plan.

Can I claim QSBS if I bought shares on the secondary market?

No. QSBS must be acquired at original issuance directly from the company. Shares purchased from another shareholder on the secondary market do not qualify, even if the underlying company meets all other requirements. There is one exception: if you receive QSBS through a gift or inheritance, the recipient generally steps into the original holder’s QSBS status and holding period.

What happens to QSBS eligibility if my company converts from S corp to C corp?

Shares issued while the company was an S corporation do not qualify as QSBS. However, shares issued after the conversion to C corp status can qualify, assuming all other requirements are met at the time of that new issuance. The conversion itself doesn’t retroactively fix previously issued shares, so the timing of the conversion relative to your stock issuance is critical.

Does QSBS apply to stock options (ISOs/NSOs)?

Stock options themselves are not QSBS. However, the shares you receive when you exercise those options can qualify if the company meets all QSBS requirements at the time of exercise. For incentive stock options (ISOs) and non-qualified stock options (NSOs), the exercise date is when the QSBS clock starts. Your adjusted basis for the 10x cap calculation is the amount you paid to exercise plus any income recognized at exercise.

Can a trust hold QSBS?

Yes. Certain trusts can hold QSBS and pass the exclusion benefit through to their beneficiaries. Grantor trusts, in particular, are commonly used because they are treated as the grantor for tax purposes. This is one reason trusts are a popular tool for stacking exclusions across family members. The trust must have acquired the shares at original issuance or received them as a gift from the original holder.

What documentation do I need to prove QSBS status?

Start collecting documentation at issuance, not at sale. You’ll want:

• A written statement from the company confirming C corp status and gross assets at issuance
• Your stock purchase agreement or exercise documentation showing original issuance
• Records showing you paid cash, property, or services
• The company’s certification that it operates a qualified trade or business
• Ongoing confirmations that the 80% active business test is met.

Without these records, proving QSBS status during an audit becomes extremely difficult.

How does QSBS interact with Opportunity Zone investments?

These are separate tax incentives that can potentially complement each other. If you sell QSBS before the five-year mark and don’t qualify for Section 1045 rollover, you could invest the recognized gain into a Qualified Opportunity Zone Fund to defer that gain. However, if your QSBS qualifies for the full exclusion, you likely won’t have recognized gain to defer. The interaction matters most for partial exclusions or gains exceeding the QSBS cap.

This material is intended for general informational purposes only, and should not be construed as legal, tax, investment, financial, or other advice. It does not consider the specific investment objectives, tax and financial condition or needs of any specific person. To the extent that this material concerns tax matters, it is not intended or written to be used, and cannot be used, by a taxpayer for the purpose of avoiding penalties that may be imposed by law. Investing involves the risk of loss, including loss of principal.

Summitry, LLC is a registered investment advisor in the State of California. For more information about Summitry, including fees and services, please see our Form ADV Part 2A or contact us directly.