Section 1202 can exclude some or all of the eligible gain on a qualifying stock sale. Whether you get there depends on the applicable legal requirements and the actual facts — acquisition date, holding period, issuer eligibility, and the per-issuer gain limitation. Letters and memos can organize and support evidence. They do not create eligibility, guarantee an exclusion, or substitute for the underlying records.
This post is about the records founders should maintain so those facts can be shown when it matters — under diligence, at exit, or on examination. For detailed eligibility rules, exclusion percentages, and gain limits, see The Complete Guide to QSBS (Section 1202) and the QSBS eligibility checklist.
Brief §1202 orientation
Keep two dates separate. Issuance date generally decides which aggregate gross-assets ceiling applies: $50 million for stock issued on or before July 4, 2025, and $75 million for stock issued after that date (with inflation adjustment after 2026). Acquisition date — after statutory holding-period tacking under §1202(a)(6), including the §1223 cross-reference — generally decides the exclusion percentage and which dollar limit applies. Issuance and acquisition dates are not interchangeable, and they are not always the same share-by-share.
In short, there are effectively two regimes founders may hold at once:
- Stock acquired on or before July 4, 2025 — generally a $10 million or 10× basis eligible-gain limit, subject to the statutory reductions; more than five years of holding for the applicable exclusion percentage (100% for acquisitions after September 27, 2010; earlier qualifying vintages generally 50% or 75%).
- Stock acquired after July 4, 2025 — generally a $15 million or 10× basis eligible-gain limit, subject to the statutory reductions; 50%, 75%, and 100% exclusions after at least three, four, and five years.
The §1202(b) eligible-gain limit is the gain taken into account before the exclusion percentage is applied. On a 50% tier with a $15 million applicable limit, the excluded amount is $7.5 million, not $15 million. The two dollar figures are coordinated across vintages of the same issuer under §1202(b)(4); a taxpayer does not get a separate $10 million allowance and a separate $15 million allowance against the same issuer. Further mechanics belong in the Complete Guide.
Company records vs. shareholder records
QSBS has two sides. The company must satisfy issuer-level requirements: C corporation status, domestic corporation, the gross-assets ceiling at the required times, active-business and qualified-trade-or-business rules during substantially all of the relevant holding period, and a redemption history that does not taint stock. The shareholder must satisfy holder-level requirements: original issuance or a permitted transfer, acquisition date and tacking, holding period, basis, and prior use of the per-issuer gain limit.
Company files do not automatically prove a shareholder’s acquisition date, tacking, or prior §1202 usage. Shareholder files do not automatically prove historical gross assets or active-business compliance across the hold. Build and keep both sets. Attestation letters can pull the two sides together for a reader; they still rest on those records.
The records checklist
Use the categories below as the spine of the file. Each one helps establish a different statutory element. Prefer contemporaneous documents. Later reconstruction may still help when it rests on reliable underlying evidence; its weight depends on the record that remains.
1. Formation, tax classification, and conversion documents
Company. Articles of incorporation, bylaws, organizational board consents, EIN and tax-classification elections, and — if applicable — LLC-to-C-corp conversion agreements, contribution agreements, valuation or FMV support at contribution, and closing schedules.
What this helps establish. That the issuer is (and was) a domestic C corporation at issuance; when stock was first issued in a conversion; and what property and basis came across. If the company started as an LLC taxed as a partnership, pre-conversion membership time generally does not count toward the §1202 holding period — the clock starts when the C corporation issues stock. For §1202 purposes only, §1202(i)(1)(B) can set a floor on basis for the 10× calculation at not less than the fair market value of contributed property; that floor does not change ordinary tax basis or make pre-contribution appreciation excludable. Keep the two basis figures apart.
2. Issuance approvals, purchase agreements, payment evidence, and stock ledger
Company. Board (and stockholder, if required) approvals authorizing each issuance; stock purchase or subscription agreements; proof of cash payment or property contribution; stock certificates or electronic ledger entries; cap-table snapshots tied to each issuance date.
What this helps establish. Original issuance from the corporation (secondary purchases generally do not qualify, subject to limited exceptions such as gift, inheritance, and certain partnership distributions); the issuance date that selects the gross-assets ceiling; and the share identity that later analyses attach to. Without a clean ledger, tranche-level acquisition dates and limits are hard to defend.
3. Relevant vesting, exercise, and §83(b) records
Company and shareholder. Restricted stock agreements; option grants and exercise notices; early-exercise paperwork; timely filed §83(b) elections with proof of filing; vesting schedules and release or repurchase notices.
What this helps establish. When the holding period begins. Vested founder stock generally starts at issuance. Substantially nonvested §83 property generally starts just after vesting unless a timely §83(b) election is filed, in which case it begins just after transfer (see Treas. Reg. §1.83-4(a)). Option stock generally starts at exercise — and only then if the shares are vested, or if a timely §83(b) covers early-exercised unvested shares. Without the election, early exercise alone does not start the §1202 clock.
4. Historical and immediately-after-issuance gross-assets support
Company. Balance sheets and supporting workpapers for the issuer and its predecessors covering the statutory pre-issuance lookback on or after August 10, 1993, plus the immediately-after-issuance calculation including issuance proceeds; notes applying aggregation and contributed-property rules under §1202(d).
What this helps establish. That aggregate gross assets stayed within the applicable ceiling ($50 million or $75 million, by issuance date) at all required times before issuance and immediately after. A prior breach of the applicable ceiling is not cured by reducing assets before a later issuance. Later growth after a qualifying issuance does not by itself disqualify previously qualifying stock.
5. Active-business evidence over the relevant holding period, including material changes
Company. Periodic balance sheets and workpapers for the §1202(e) active-business test (often framed around the 80% asset standard); descriptions of operations and revenue mix for the qualified trade or business analysis under §1202(e)(3); board materials or memos when the company pivots, parks large cash in investment assets, or shifts subsidiary mix toward passive holdings.
What this helps establish. That during substantially all of the taxpayer’s holding period the corporation met the active-business requirements and remained a C corporation. “Substantially all” is a facts-and-circumstances standard — short, isolated gaps are not automatic disqualification, but persistent or extended noncompliance is a real risk. A single year-end snapshot does not prove compliance for every month of a multi-year hold; that is why material mid-year changes belong in the file when they happen.
6. Redemption and other significant transaction records
Company. Redemption agreements, board approvals, payment records, and contemporaneous notes on parties, dates, amounts, and reason; records of recapitalizations, company-facilitated secondaries, and other significant capital transactions.
What this helps establish. Whether redemptions within the statutory windows around an issuance taint stock under §1202(c)(3) and Treas. Reg. §1.1202-2 — including for shareholders who did not sell. The termination-of-services exception is narrow: the seller must have acquired the stock in connection with services as an employee or director, and the repurchase must be incident to retirement or another bona fide termination of those services. A buyback is not exempt merely because employment ended. A shareholder-to-shareholder secondary is not automatically a corporate redemption. For detailed windows, thresholds, and exceptions, use the Complete Guide and Treas. Reg. §1.1202-2.
7. Shareholder acquisition dates, tacking, basis, transfers, and prior use of the issuer-level gain limit
Shareholder (with company support where available). Personal acquisition dates after tacking; ordinary tax basis and any §1202-specific basis floor; gift, estate, or partnership-distribution paperwork; §1045 rollover elections and replacement-stock files if used; a running tally of eligible gain from the same issuer taken into account in prior years.
What this helps establish. The correct exclusion percentage and dollar limit for each tranche; that transfers were of a kind that preserve QSBS character where the statute allows; and that repeated exits or multi-holder planning against the same issuer are measured against the coordinated §1202(b) limits. Adding eligible taxpayers can increase capacity because the limit is per shareholder per issuer — but eligibility still turns on law and facts for each holder. Documentation helps show those facts; it does not create eligibility by itself. Whether spouses filing jointly have one dollar limitation or two remains unsettled; treat that as a position to analyze with counsel, not as settled law.
Routine review vs. event-driven review
Two rhythms matter. Neither replaces the other.
Routine (calendar) review. Once a year, on a fixed date, refresh the file: confirm C-corp and domestic status; update active-business workpapers; note any redemptions or capital transactions; update the stock ledger and each significant holder’s acquisition-date, exclusion-percentage, and per-issuer-limit summary; flag open assumptions. A dated memo that identifies the stock and periods reviewed, the records relied on, and unresolved issues is a useful practice. It is not a statutory requirement to issue an “annual letter,” and the existence or number of letters does not determine eligibility. See annual QSBS substantiation practice and what an attestation letter needs to say.
Event-driven review. When something material happens, review then — do not wait for year-end. Financings (new issuances and immediately-after gross-assets tests), redemptions and buybacks, entity conversions or recapitalizations, business pivots or large shifts into investment or real-estate-type assets, and transfers (gifts, estate planning moves, secondaries) can change the analysis mid-year. A clean December memo does not establish compliance throughout a holding period that included a June redemption or an August pivot.
Washington note
Gain excluded federally under §1202 is outside Washington’s capital gains tax; the federal exclusion controls for that tax. Because excluded §1202 gain does not enter federal adjusted gross income, it also does not reach Washington base income under the state’s income-tax framework effective for 2028 — so the excluded portion sits outside that base as well, not only the capital gains tax. Residency and timing still matter for amounts that are not excluded. More detail: Washington capital gains tax and the Washington state income tax.
Short FAQ
Does Washington tax §1202-excluded gain? No, not under the capital gains tax — federally excluded §1202 gain is outside that tax. The same AGI-based logic keeps the excluded amount out of the 2028 income-tax base. Amounts that are not excluded are a different question.
Can I claim QSBS if I moved out of Washington? §1202 is federal and does not depend on Washington residency. State tax on any non-excluded gain follows the law of your residency (and sourcing rules) at the relevant time.
What should be in the file at exit? The seven categories above: formation and conversion; issuance and ledger; vesting, exercise, and §83(b); historical and immediately-after gross assets; active-business evidence across the hold; redemption and significant-transaction records; and each holder’s acquisition, tacking, basis, transfer, and prior-limit history. Supporting certifications help only to the extent the underlying records do.
Need help organizing the file?
If you want counsel to review your QSBS records or prepare a QSBS attestation letter grounded in those records, we offer flat-fee engagements after a short intake call.
Joe Wallin is a Seattle-based startup attorney at Carney Badley Spellman. He writes The Startup Law Blog.
Nothing in this post is legal advice. Reading this post does not create an attorney-client relationship.
