The Washington Founder's QSBS Playbook: How to Qualify, Document, and Defend Your §1202 Exclusion

For Washington founders, §1202 is the single most valuable tax provision in the federal code. It can mean the difference between paying $0 and paying 23.8% federal capital gains tax on up to $10 million (pre-OBBA stock) or $15 million (post-OBBA stock) — or 10× your basis, whichever is greater — when you sell your company.

There are now effectively two §1202 regimes that founders need to track:

• Pre-OBBA stock (issued on or before the OBBA enactment date) — $10M / 10× cap, $50M gross assets test, flat 5-year holding period for 100% exclusion
• Post-OBBA stock (issued after enactment) — $15M / 10× cap, $75M gross assets test, tiered holding period (50% exclusion at 3 years, 75% at 4 years, 100% at 5 years)

Most operating companies will eventually hold a mix. A founder who incorporated in 2022, raised a Series A in 2024, and a Series B in 2026 has both pre- and post-OBBA stock outstanding, with two different sets of rules running in parallel.

That mixed reality is one of the reasons annual documentation matters more under OBBA, not less.

For Washington founders, the value is even higher. Washington capital gain that's federally excluded under §1202 is also exempt from the Washington capital gains tax — the federal exclusion controls at the state level. A properly documented exclusion in Washington means $0 federal and $0 state on up to $10M (pre-OBBA) or $15M (post-OBBA) per shareholder per issuer. There are not many places in the country where you can stack that combination, and it's the single biggest reason to take the §1202 documentation discipline seriously here.

Most founders I work with arrive at the closing table with one of three problems: they're not sure they qualify, they can't prove they qualify, or they did something years ago that quietly broke the exclusion. The IRS does not send reminders. The buyer's diligence team will not give you the benefit of the doubt.

This is the playbook I wish every Washington founder had on day one — the eligibility rules for both regimes, the documentation discipline, the annual practice, and the specific traps that disqualify exclusions that should have worked.

If you do nothing else: bookmark this page, set a calendar reminder for the same week every year, and run the checklist at the end.

What §1202 actually does (plain English)

§1202 lets a non-corporate taxpayer exclude gain on the sale of qualified small business stock from federal income tax. There are now two parallel regimes:

The stacking leverage. Because the cap is per-shareholder per-issuer, a married couple with stock in the same company can claim 2× the cap. A family that gifts QSBS to trusts can multiply the cap further. This is one of the most underused planning levers in §1202 — and it depends entirely on having clean attestation documentation for each holder.

Why Washington founders care more than most. Washington has no state income tax on wages, and Washington capital gains that are excluded under §1202 are not subject to the Washington capital gains tax. The federal exclusion controls. That means a properly documented §1202 exclusion in Washington is worth materially more than the same exclusion in California (which does not conform to §1202 and still imposes ~13.3% on the gain).

The seven eligibility tests (in order of how often founders blow them)

The 5-year clock: where it starts, where it stops, where it resets

The holding period is the test that founders most often think they understand and most often get wrong in the details. Five anchor points:

1. Clean founder stock at incorporation. Clock starts on the date the C-corp issues stock to you. Simple.

2. Option exercises. Clock starts on the exercise date, not the grant date. This is the most common employee misconception — and the reason early exercise (where allowed) can be a meaningful tax planning move for non-founders who want to start their §1202 clock as early as possible.

3. LLC-to-C-corp conversion (where the LLC was taxed as a partnership). Clock starts at the date the C-corp issues stock in the conversion. Pre-conversion LLC time does not count. The carryover basis you bring in does matter — it sets your floor for the 10× basis cap at exit.

4. §1045 rollover. A founder who sells QSBS before reaching the 5-year holding period can roll the proceeds into new QSBS within 60 days and tack the prior holding period onto the new stock for §1202 purposes. The original §1045 rollover rules were not modified by OBBA, so far as the statute reads — but the IRS has not yet issued regulations on how §1045 interacts with the new post-OBBA tiered-exclusion regime. Founders considering a §1045 rollover that crosses pre-OBBA and post-OBBA stock should treat the planning as a moving target until those regulations come out.

5. Redemptions that taint the holding period. Certain corporate redemptions occurring within prescribed windows around the issuance can disqualify stock for §1202 purposes — even for shareholders who had nothing to do with the redemption. This is the silent killer of QSBS exclusions.

The most important practical carveout: regulations provide that a buyback of stock from an employee at the end of their service period generally does not trigger the redemption rules. Routine cap-table cleanup at termination is safe. Discretionary treasury buybacks, founder secondaries, and broad-based liquidity programs are the redemptions that create real risk. A company that runs a tender offer for early employees one year before issuing Series B preferred can quietly disqualify a slice of its cap table that nobody on the board knew was at risk.

This is exactly the kind of event that an annual review catches in the year it happens — when it can still be planned around — rather than at exit, when the diligence team finds it and the price gets adjusted.

The Active Business Test: the one most founders ignore

This is the test that breaks exclusions silently. The statute requires that during substantially all of the taxpayer's holding period for the stock, the corporation meets the active business requirements of §1202(e) and remains a C corporation.

Two words in that sentence do enormous work: substantially all. The statute does not require continuous compliance. It requires substantial compliance across the holding period. Short, isolated periods of non-qualification do not automatically destroy the exclusion — but persistent or extended periods do.

That ambiguity is exactly why the annual practice matters. "Substantially all" is a fact-pattern test. The founder who can produce five dated annual memos showing the company met the test each year is in a fundamentally stronger position than the founder reconstructing the analysis at exit and arguing about what "substantially" means under pressure.

The trap scenarios: a company that raises a large round and parks $40M in T-bills can drift out of compliance in a year where investment assets dominate the balance sheet. A company that pivots toward real estate or holding-company activities can drift out. A company whose subsidiary mix shifts toward passive holdings can drift out. None of these necessarily blow the exclusion — but each one creates a documentation question you need to answer in real time, not in hindsight.

What this means in practice: You run the test annually, document the result, and build a contemporaneous record. Not at exit. Annually. This is the foundation of the annual attestation practice — and the reason a one-time analysis at sale is not enough.

The Washington overlay

For Washington founders, the math on §1202 is even better than it looks on the federal side.

The headline: Washington capital gains that are excluded under §1202 are not subject to the Washington capital gains tax. The federal exclusion controls. If your gain qualifies for §1202, the state tax follows the federal treatment — you owe nothing at either level on the excluded portion.

That is a meaningful planning fact. It means a Washington founder who properly documents §1202 eligibility can take a $10M exclusion and pay $0 in federal tax and $0 in state tax on the same gain. Compare that to a California founder, who pays 0% federal but still owes California's ~13.3% on the gain — California does not conform to §1202.

This is the single largest reason to take the annual attestation practice seriously if you live and work in Washington. The combined value of the exclusion is materially higher here than almost anywhere else in the country.

Further reading on the Washington overlay (linked posts coming — each is its own deep-dive):

• Washington founder domicile and the §1202 exit
• Timing a move out of Washington against a liquidity event
• ING / DING trust strategies for high-value §1202 exits
• B&O tax considerations for QSBS-issuing entities

How to defend the exclusion under audit

Buyers' diligence teams in M&A and the IRS under examination both ask for the same thing: contemporaneous documentation that the corporation met each §1202 requirement at the relevant times during the holding period. Contemporaneous documentation always wins. Post-hoc reconstruction always loses — or at best, results in a discount on the purchase price to account for the uncertainty.

The right documentation set, at minimum, includes:

• Formation documents and any conversion documents (if the company started as an LLC)
• Stock issuance records, with dates and basis for each share
• Balance sheets immediately before and immediately after each stock issuance (for the gross assets test)
• Annual financials documenting the active business test calculation
• Records of any redemptions, including the parties, dates, amounts, and reason
• Annual attestation letters confirming §1202 eligibility status each year

A company that hands a buyer five dated annual attestation letters at the diligence stage closes the §1202 question in an afternoon. A company that hands the buyer a stack of unorganized financials and an offer to "have our lawyers look at it" creates weeks of friction and gives the buyer leverage to renegotiate.

The annual practice: why one attestation at exit is not enough

The companies that successfully claim §1202 exclusions at exit have one thing in common: they built a paper trail year by year, not in a panic the week before signing.

Here is what the annual practice looks like.

Every year, by the same date, you confirm:

1. The company still meets the active business test (run the 80% calculation)
2. No redemptions, recapitalizations, or transactions have occurred that could taint your holding period
3. Your aggregate gross assets test was not violated at any new issuance
4. Your trade or business has not drifted into a disqualified category
5. Each shareholder's holding period is documented and current

The output of that review is an annual attestation letter — a dated, signed document from counsel confirming the company's QSBS status as of that year. Stacked across five years, those letters are the spine of your defense at exit.

Most founders never build this practice. They either don't know they need to, or they don't want to think about it until the exit is on the table. By then, fixing it is expensive — sometimes impossible.

We built a productized version of this practice for the Washington founders we serve. It runs on a fixed annual fee, includes the attestation letter and a planning call, and replaces the ad-hoc "call the lawyer in a panic" model with predictable, calendared discipline.

→ Learn about QSBS Sentinel™, our annual attestation service

The annual QSBS checklist

Print this. Tape it to your desk. Run it every year on the same date.

1. Confirm C-corp status — no conversion or change in entity classification
2. Confirm domestic-corporation status
3. Confirm the company has not engaged in a redemption that would taint stock under §1202(c)(3)
4. Run the active business (80%) test for the year — document the calculation
5. Confirm the trade or business has not drifted into a §1202(e)(3) excluded category
6. Confirm aggregate gross assets did not exceed the applicable threshold ($50M pre-OBBA / $75M post-OBBA) at or immediately after any issuance during the year
7. Update the stock ledger with any new issuances and document basis
8. For any option exercises during the year, document the exercise date and basis
9. For any §1045 rollovers, document the timing and tacked holding period
10. Confirm cap-table holders' addresses (for state-residency planning)
11. Document any material events (financings, secondaries, recaps, pivots)
12. Issue or update the annual §1202 attestation letter for the company and for each significant shareholder

→ Download the printable PDF version (replace with PDF link once created)

Frequently asked questions

Does Washington tax §1202-excluded gain? No. Washington capital gains that are excluded under §1202 are not subject to the Washington capital gains tax. The federal exclusion controls at the state level.

What if I converted from an LLC? If your LLC was taxed as a partnership, the §1202 holding period starts at the date the new C-corp issues stock to you in the conversion. Pre-conversion LLC membership time does not count toward the 5-year holding period. The basis you carry in from the LLC does serve as the multiplier for the 10× basis cap at exit.

Can I claim §1202 if I bought my stock on a secondary? Generally no. §1202 requires that the stock be acquired at original issuance from the corporation. Secondary purchases do not qualify, with limited exceptions for gifts, inheritance, and certain partnership distributions.

Do options qualify for §1202? The underlying stock qualifies if it otherwise meets the requirements. The 5-year clock starts on the exercise date — not the grant date — because that is when you become a shareholder.

What happens if my company pivots? A pivot can affect the qualified trade or business test or the active business test, depending on what the company moves into. The "substantially all" standard gives some room, but persistent or extended periods of non-qualification put the exclusion at risk. This is exactly the kind of fact pattern that benefits from annual review.

Does §1045 rollover preserve my QSBS treatment? Yes — a §1045 rollover allows you to sell QSBS before reaching the 5-year holding period and roll the proceeds into new QSBS within 60 days, tacking the prior holding period onto the new stock. The OBBA changes did not modify §1045 itself, but IRS regulations on how §1045 interacts with the post-OBBA tiered regime have not yet been issued.

How do I stack the exclusion across family members? The §1202 cap is per-shareholder per-issuer. Married couples can claim 2× the cap. Trusts can be used to multiply the cap further — but the planning and documentation discipline required to make stacking work is non-trivial.

Can I claim QSBS if I moved out of Washington? Yes — §1202 is a federal provision and applies regardless of state of residency at the time of the sale. State tax treatment depends on the new state of residency at the time of sale. Domicile and timing are their own planning topics — covered in a follow-up post.

What's a §1202(h) recapitalization? §1202(h) addresses how stock acquired through certain conversions and recapitalizations is treated for §1202 purposes. Done correctly, the new stock can step into the shoes of the original QSBS. Done incorrectly, it can blow the exclusion.

What documents do I need at exit? Formation and conversion documents, stock issuance records, balance sheets at each issuance, annual financials documenting active business compliance, redemption records, and ideally a stack of dated annual attestation letters covering the holding period.

Joe Wallin is a Seattle-based startup attorney at Carney Badley Spellman. He has spent the bulk of his career representing founders, early-stage companies, and the investors who back them, with a particular focus on the equity, tax, and securities issues that determine what a founder actually keeps at exit. He writes The Startup Law Blog, which has been the de facto reference for Washington startup legal questions for more than a decade.

Nothing in this post is legal advice. Reading this post does not create an attorney-client relationship.