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Sell A Business And Exclude Huge Capital Gains.

QSBS rules can exclude a large portion of gain on qualifying C-Corp stock. The catch: you must plan years in advance and meet strict requirements.

A guide by Taxstra Tax & Accounting · CPA-led tax strategy for business owners

Written by Bryan Martin, CPA, Managing Partner and Founder of Taxstra. Last updated July 10, 2026.

Quick answer: Section 1202 lets founders and early investors exclude up to 100% of the capital gain on qualified C corporation stock from federal tax. Which rules apply depends on when your stock was issued. Stock issued on or before July 4, 2025 follows the classic rules: a 5-year holding requirement and a cap at the greater of $10 million or 10x basis. Stock issued after July 4, 2025 gets the new OBBBA rules: a tiered 50%/75%/100% exclusion at 3, 4, and 5 years, a $15 million cap, and a $75 million company asset limit.

Why This Strategy Exists

The thinking behind the Section 1202 exclusion

Every major tax strategy is just the government's way of paying you to behave in a certain way—provide housing, hire people, save for retirement, or structure your business cleanly.

QSBS (Section 1202) is designed for situations like yours—high income, real dollars at stake, and enough complexity that a generic tax return won't cut it.

The Core Concept

Qualified Small Business Stock (QSBS) allows founders and early investors to exclude up to 100% of their capital gains from federal tax. The cap is the greater of $10 million or 10x basis for stock issued on or before July 4, 2025, and the greater of $15 million or 10x basis for stock issued after that date.

Watch Out

The Risk Of DIY

This strategy gets thrown around online as a magic bullet. The reality: the IRS is very specific about who qualifies, what documentation is needed, and how it must be reported.

Most of the messes we clean up come from half-implemented versions—no logs, no elections, no support—and big deductions that fall apart under scrutiny.

What The OBBBA Changed

New rules for stock acquired after July 4, 2025

The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, is the biggest expansion of Section 1202 since 2010. The new rules apply only to stock acquired after the enactment date. Stock issued on or before July 4, 2025 stays under the classic rules, so many founders now hold a mix of old-rule and new-rule shares.

RuleHolding period and exclusion
Stock issued on or before July 4, 2025All or nothing: 100% exclusion only after a 5-year hold (for stock acquired after September 27, 2010; older stock gets 50% or 75%)
Stock issued after July 4, 2025Tiered: 50% exclusion at 3 years, 75% at 4 years, 100% at 5 years
RulePer-issuer gain cap
Stock issued on or before July 4, 2025Greater of $10 million or 10x your basis in the stock
Stock issued after July 4, 2025Greater of $15 million (indexed for inflation after 2026) or 10x basis
RuleCorporate gross-asset ceiling
Stock issued on or before July 4, 2025$50 million at all times before and immediately after issuance
Stock issued after July 4, 2025$75 million, indexed for inflation starting in 2027

The tiered exclusion is the practical headline. Under the old rules, selling at year 4 meant zero exclusion. For new-rule stock, a founder who sells at year 3 excludes 50% of the gain and one who sells at year 4 excludes 75%, which changes how you negotiate exit timing. On a $10 million gain, a year-4 sale of new-rule stock shields $7.5 million from federal capital gains tax instead of nothing.

Watch Out

State Taxes Do Not Always Follow

Not every state conforms to Section 1202. California is the big one: it provides no QSBS exclusion at all, so a California resident can exclude 100% of a gain federally and still owe full state tax on it at rates up to 13.3%. A few other states, including Pennsylvania, Alabama, and Mississippi, also decouple. Residency and timing planning around an exit is part of the strategy, not an afterthought.

The Core Rules You Can't Ignore

How it works

Every strategy has a handful of non-negotiables. Get these right, and you're usually fine. Miss them, and no amount of clever structuring will save the deduction.

RequirementOriginal Issuance
What We CheckYou must acquire the stock directly from the corporation at original issuance, for money, property, or services. Stock bought from another shareholder on the secondary market does not qualify.
RequirementC Corporation Only
What We CheckThe issuer must be a domestic C corporation when the stock is issued and during substantially all of your holding period. S corporation and LLC interests do not qualify, which is why entity choice years before an exit matters so much.
RequirementGross-Asset Test
What We CheckThe corporation must have aggregate gross assets of $50 million or less (stock issued on or before July 4, 2025) or $75 million or less (stock issued after July 4, 2025) at all times before and immediately after issuance.
RequirementQualified Trade or Business
What We CheckAt least 80% of assets must be used in an active qualified business. Service fields like health, law, accounting, consulting, financial services, and any business whose principal asset is employee reputation are excluded, along with banking, farming, hotels, and restaurants.
RequirementHolding Period
What We CheckFive years for the full exclusion. Stock issued after July 4, 2025 can also earn a partial exclusion at 3 or 4 years. Documentation of acquisition dates, basis, and the corporate-level tests at issuance is what makes the exclusion survive an audit.

Real-World Application

What this looks like for an actual client

Case study: how QSBS (1202) looked in practice. We walk through an anonymized client scenario where QSBS (1202) made sense—income levels, entities, timing, and the exact implementation steps we took.

The important part isn't just the savings. It's understanding why it fit their situation and how we built guardrails so it would hold up years later.

The numbers & the trade-offs. We show the actual tax impact, what changed in their cash flow, and what they had to commit to in terms of time, record-keeping, or complexity.

A good strategy isn't just about the current-year refund. It's about whether the savings justify the ongoing work it adds to your life.

FAQs

Qualified Small Business Stock (QSBS) · Section 1202 FAQ

We look at your income mix, time capacity, state situation, and risk tolerance. In many cases, simpler planning provides a better ROI with less complexity. If this strategy doesn't clear the bar, we'll tell you that directly.

Want To See If QSBS (1202) Fits You?

In 30 minutes, we can usually tell you whether this strategy is worth pursuing, what documentation you'd need, and how it would interact with everything else in your financial life.

If we don't think this move makes sense for you, we'll say so directly—and help you focus on simpler, higher-ROI options instead.

Authoritative Sources

Citations reflect U.S. federal tax law as of the article's last reviewed date.

Replace the QSBS label with an evidence file

QSBS analysis requires facts about the issuer, issuance, acquisition date, business activity, holding period, redemptions, and the shareholder. A company presentation calling shares “QSBS eligible” is a starting point for inquiry, not a guarantee.

Evidence Question
Issuance and acquisition documents How and when were the shares acquired?
Issuer tax status Was the required corporate status present?
Asset and business information Were the statutory tests met?
Redemption and transaction history Do exclusions or limitations apply?
Ownership and disposition records Which lot and rule version govern?

Track issuance dates carefully because legislative changes can make acquisition timing material. Avoid applying one holding-period or exclusion summary to every lot without checking current law.

The review may require information only the company can provide. Identify missing evidence before a sale deadline, and model the transaction without assuming an exclusion until the requirements are supported.

Sources: 26 U.S.C. Section 1202 and IRS Publication 544.

Apply this to your records

Use the printable worksheet to compare the example with your records, identify missing support, and assign follow-up questions.

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Outline the award types, employment changes, transaction dates, and liquidity constraints. We can discuss equity-compensation planning scope and coordination with your financial and legal advisers.

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Educational, not individualized tax advice. Examples are hypothetical. Content updated September 5, 2026; confirm the rules applicable to your year and circumstances.

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