QSBS Section 1202

The most generous tax treatment available to private-stock holders, and the rules you have to follow to keep it.

Last reviewed on 27 April 2026

This page is general education, not tax advice. The rules below summarise Internal Revenue Code Section 1202 as a working framework. Your specific facts — entity type at issuance, the company's gross assets, your holding history, your state of residence — change the answers. Talk to a CPA who has actually filed Section 1202 returns before relying on any of this.

Section 1202 of the Internal Revenue Code lets a non-corporate holder of Qualified Small Business Stock (QSBS) exclude a portion or all of the federal capital gain on the sale of that stock — up to a per-issuer cap of the greater of $10 million or 10× the holder's adjusted basis. For founders and early employees, this can be the difference between paying $0 of federal tax on a $10M gain and paying $2.38M. It is the single most valuable tax break available to private-stock investors.

Most pre-IPO holders never claim it because they do not realise their shares qualify, or they sell before satisfying the five-year holding period. This page walks through who qualifies, what the company has to look like, how the exclusion is computed, and the planning techniques that genuine high-stakes shareholders use to expand the cap.

What Counts as QSBS

The shares must satisfy six conditions, all of which must be true at specific moments in time. Miss one and the entire stock loses QSBS status — there is no partial qualification.

1. C-Corporation

The issuing entity must be a domestic C-corporation at the time the stock is issued and for substantially all of the holder's holding period. LLCs and S-corporations do not qualify. Conversions from LLC to C-corp are common in the venture-backed world specifically because the QSBS clock cannot start until the C-corp election is in place.

2. Original Issuance

The stock must be acquired by the holder at original issuance in exchange for money, property (other than stock), or services. Buying shares on a secondary market does not qualify — the buyer of secondary stock does not satisfy original issuance and inherits no QSBS treatment, even if the seller's shares were QSBS in the seller's hands.

Important exception: stock acquired by gift, inheritance, or in certain partnership distributions tacks the prior holder's QSBS qualification and holding period. This is why gift planning matters (see "stacking" below).

3. Five-Year Holding Period

The holder must hold the stock for more than five years before sale. The clock starts on the date the stock is acquired (typically the issuance date) and runs continuously. Sales before five years are simply taxed as ordinary capital gains; the QSBS exclusion is unavailable.

An exception under Section 1045 allows a holder who has held QSBS for at least six months to roll the proceeds into other QSBS within 60 days of sale, deferring the gain and tacking the holding period of the original stock. This is a useful tool for early exits when the holder wants to maintain QSBS exposure.

4. Active Business Requirement

During substantially all of the holder's holding period, the company must use at least 80% of its assets in the active conduct of a qualified trade or business. Investment companies, holding companies, and businesses where capital sits idle do not satisfy this. Working capital and reasonably-required reserves count toward the 80%.

5. Qualified Trade or Business

Section 1202 enumerates excluded businesses. Disqualified businesses include:

  • Health, law, accounting, actuarial, performing arts, consulting, athletics, financial services, brokerage services, and similar businesses where the principal asset is the reputation or skill of one or more employees.
  • Banking, insurance, financing, leasing, investing, or similar businesses.
  • Farming businesses.
  • Mining, oil and gas extraction (some exceptions).
  • Hospitality (hotels, motels, restaurants, and similar).

Most software, biotech, hardware, consumer products, and SaaS businesses qualify. The "principal asset is the reputation or skill of employees" exclusion has caught some marketing and creative agencies — boundary cases are real and should be reviewed by counsel.

6. Gross Assets Test

At all times before the stock is issued, and immediately after, the company's aggregate gross assets must not exceed $50 million. Gross assets include cash and the adjusted basis of other property. The test is on a single point in time — once the company has crossed $50M, all subsequent issuances are non-qualifying, but stock issued before crossing remains QSBS forever (subject to the other conditions).

This is the bright line that determines whether new equity issued in a Series B, C, or later still qualifies. By the time most companies reach $50M of cash plus assets, no new shares can be QSBS. Founders and early employees benefit; mid-stage hires and late-stage investors usually do not.

How the Exclusion Works

For QSBS acquired after 27 September 2010, the exclusion is 100% of qualifying gain on federal capital gains tax. The excluded portion is also exempt from the 3.8% Net Investment Income Tax (NIIT) and from Alternative Minimum Tax (AMT). Stock acquired between 18 February 2009 and 27 September 2010 was 75% excludable; earlier QSBS was 50% excludable. The 100% rule has been in place for fifteen years and is the relevant one for any pre-IPO position acquired in living memory.

The excluded amount is capped per issuer at the greater of:

  • $10 million of cumulative gain, reduced by amounts excluded in prior years for the same issuer; or
  • 10× the holder's aggregate adjusted basis in QSBS of that issuer disposed of during the year.

The cap is per holder, per issuer. Two QSBS positions in different companies have separate caps. Spouses filing jointly share a single cap on the same issuer.

Worked Example

An employee receives a stock-option grant when the company has $5M of gross assets in 2018. She exercises in 2020, paying $50,000 in strike-price exercise. The shares are QSBS — issued by a qualifying C-corp at original issuance. Her basis is $50,000.

In 2026, the company is acquired. Her shares sell for $10,050,000. Her gain is $10,000,000. Six years have passed since exercise; she clears the five-year holding period.

  • Per-issuer cap: greater of $10M or 10× her $50,000 basis = greater of $10M or $500,000 = $10M.
  • Excludable gain: full $10M (the whole gain is within the cap).
  • Federal tax owed on the $10M gain: $0.
  • Federal tax under ordinary capital gains rates without QSBS: roughly 23.8% × $10M = $2.38M.
  • Tax saved: $2.38M.

Now consider a founder with the same exit but a $1M basis on $20M of gain.

  • Per-issuer cap: greater of $10M or 10× $1M = $10M (10× basis ties the floor here, not increasing it).
  • Excludable gain: $10M of the $20M.
  • Taxable gain: $10M, taxed at ordinary capital-gains rates.
  • Without proper planning, half of the gain is excluded and half is taxed.

This founder's gain exceeds the $10M floor but the 10× basis multiplier does not raise the cap further (because $10M floor > $1M × 10). Founders with high gains and low basis often end up exactly here. Stacking is the planning technique that addresses it.

Stacking the Exclusion

Because the per-issuer cap applies per holder, splitting the same QSBS position across multiple holders multiplies the cap. The two main techniques:

Gift Stacking

Gifts of QSBS preserve the donor's holding period and original-issuance status in the donee's hands. A founder gifts a portion of QSBS to a child, a parent, or a non-grantor trust. The donee now has their own $10M / 10× cap, separate from the founder's. The donee can sell, claim their own exclusion, and retain the proceeds. Limits:

  • Federal gift tax applies above the annual exclusion (for 2026 the unified estate-and-gift exemption is several million dollars).
  • The donee must hold the shares through the eventual sale; the donor cannot sell on their behalf.
  • Anti-abuse rules apply to gifts close in time to a known sale event. Most planners avoid gifts within 12 months of a likely exit.

Trust Stacking

Non-grantor trusts (intentionally structured so that the trust, not the grantor, is the taxpayer) get their own $10M / 10× cap. A holder can fund several trusts — one per child, for example — each with a separate cap. State-of-trust selection matters because state-level QSBS treatment varies. A non-grantor trust in a no-income-tax state can substantially expand effective QSBS coverage.

Both techniques require advance planning and CPA + attorney involvement. Done sloppily, they invite IRS challenge. Done well, they have legitimately preserved tens of millions of dollars of value for individual founders in well-documented exits.

State Tax Treatment

Section 1202 is a federal provision. State conformity varies:

  • Most states conform to federal QSBS treatment, exempting the same gain at the state level.
  • California repealed its QSBS conformity in 2013; California residents pay full state tax on QSBS gains regardless of federal treatment. The hit is significant — 13.3% top marginal rate.
  • Pennsylvania, Mississippi, Alabama, and New Jersey have historically not conformed.
  • No-income-tax states (Texas, Florida, Washington, Tennessee, Nevada, South Dakota, Wyoming, Alaska, New Hampshire) impose no state tax regardless.

State of residence at the time of sale matters. Holders contemplating a multi-million-dollar QSBS exit have, in some cases, planned a residency change for tax purposes. State residency rules are strict and require genuine relocation — a domicile change litigated for years is a real risk.

Common Traps

  • Assuming secondary purchases qualify. They do not. A buyer of secondary common stock is not the original issuee, regardless of how long they hold.
  • Selling at four years and ten months. The five-year requirement is hard. A sale at four years and 364 days is taxed at full rates.
  • Forgetting Section 1045 rollover. An early acquisition (e.g., the company is sold) within the holding period can be salvaged by rolling proceeds into other QSBS within 60 days. Many holders forget this option exists.
  • LLC-to-C-corp conversion timing. Stock issued by an LLC that later converts to a C-corp does not become QSBS retroactively. The clock starts on the date the C-corp issues new stock to the holder.
  • Crossing the $50M asset threshold. Stock issued after the company has more than $50M of gross assets does not qualify. Late-stage employee grants frequently miss this.
  • Disqualifying business activities. A SaaS company that pivots heavily into financial services for a sustained period can be reclassified mid-stream. The "substantially all" rule cuts both ways.
  • Redemptions and buybacks. The company repurchasing its own stock from a related party in close proximity to the holder's acquisition can disqualify QSBS — Section 1202(c)(3) addresses this with a series of look-back rules.

Documentation You Need

QSBS is claimed at sale by attaching a statement to the holder's federal return. To support the claim, keep:

  • The original stock-issuance document — option grant agreement plus exercise documentation, restricted-stock agreement, or Series-X subscription agreement.
  • Evidence of the company's gross assets at and immediately after issuance — usually a CFO letter or a 1202 attorney opinion.
  • Evidence the company was a C-corp at the relevant times.
  • Evidence of the company's qualifying trade or business throughout your holding period.
  • Your basis records — exercise prices paid, basis adjustments from any prior transactions.
  • Sale documents — the Form 1099-B or K-1 showing the disposition, plus settlement statements.

Many companies issue QSBS attestation letters at the time of an exit, summarising the conditions the company met. These are non-binding but useful evidence. Hold-period records are the holder's responsibility. Our broader tax implications guide covers the related capital-gains, AMT, and state-tax interactions.

Planning Checklist

  1. Confirm in writing that the issuing entity was a C-corp at the time of your acquisition.
  2. Request the company's gross-asset position at the issuance date.
  3. Document your basis carefully on every acquisition tranche — option exercise, secondary purchase (if it somehow qualifies), early exercise with 83(b) election.
  4. Track your five-year holding period from each tranche separately. Different tranches mature at different times.
  5. If you anticipate a gain meaningfully above the $10M / 10× cap, consult a tax attorney about gift or trust stacking 12+ months before any anticipated exit.
  6. If you live in California or another non-conforming state and the gain is large, consult on residency timing and the legitimate steps required to establish domicile elsewhere.
  7. If an exit happens before five years, evaluate Section 1045 rollover into another QSBS-eligible company.

Bottom Line

QSBS is the most generous tax provision available to private-company shareholders, and it is also one of the most easily lost. It rewards founders and early employees who hold for five years, are issued stock from a C-corp under the $50M asset cap, and document everything. It rewards careful planners willing to use gift and trust structures to expand the cap. It does very little for late-stage employees, secondary buyers, and people who sell at year four. Know which side of those lines your stock sits on, and plan accordingly.