QSBS FAQ: 25 Questions Answered

The Basics

1. What is Qualified Small Business Stock (QSBS)?

Qualified Small Business Stock — governed by IRC §1202 — is stock in a domestic C corporation that you acquired at original issuance when the company's aggregate gross assets were $50 million or less ($75 million for stock issued on or after July 4, 2025). If you hold QSBS for the required period and meet the other qualifying tests, you can exclude all or a portion of the resulting capital gain from federal income tax. On a $15 million gain from a post-2010 issuance with a five-year hold, a qualifying holder pays zero federal income tax. No other provision in the tax code offers a comparable benefit to startup founders, early employees, and investors.

2. How much gain can Section 1202 exclude?

Limits are per-taxpayer and per-company:

• Pre-OBBBA stock (issued before July 4, 2025): 100% of gain up to the greater of $10 million or 10x your adjusted basis, with a five-year hold.
• Post-OBBBA stock (issued July 4, 2025 or later): tiered exclusion up to the greater of $15 million or 10x adjusted basis — 50% at three years, 75% at four years, 100% at five years.

Gifting shares to family members or trusts before a sale creates separate exclusion capacity for each recipient. See the gifting and stacking guide for the mechanics.

3. What did the One Big Beautiful Bill Act (OBBBA) change about QSBS?

OBBBA (signed July 4, 2025) made three changes for stock issued on or after that date:

1. Raised the per-taxpayer exclusion cap from $10 million to $15 million (the 10x basis rule still applies).
2. Introduced tiered exclusions — 50% at three years, 75% at four years, 100% at five years — replacing the all-or-nothing five-year rule.
3. Raised the gross assets threshold at issuance from $50 million to $75 million, allowing investors in later-stage companies to qualify.

Stock issued before July 4, 2025 uses the pre-OBBBA rules regardless of when it is sold. See the OBBBA QSBS changes guide for a detailed comparison table.

4. What is the difference between the flat cap and the 10x basis rule?

Each taxpayer gets whichever limit is larger. The flat cap ($10 million pre-OBBBA, $15 million post-OBBBA) primarily benefits founders with near-zero adjusted basis — a founder who paid one cent per share can still exclude up to $15 million. The 10x rule benefits shareholders who paid closer to fair market value: an angel investor with $1.6 million in basis can exclude up to $16 million under the 10x rule, exceeding the $15 million flat cap on post-OBBBA stock. Both limits apply per-taxpayer and per-company, which is what makes stacking across family members so powerful.

5. Is QSBS gain subject to the 3.8% Net Investment Income Tax (NIIT)?

No. Gain excluded under §1202 is explicitly excluded from the net investment income tax base under IRC §1411(c)(4). The 3.8% NIIT does not apply to QSBS-excluded gain. However, any gain above the exclusion cap — for example, if your gain exceeds the 10x or $15 million limit — is treated as ordinary long-term capital gain and is subject to both the 20% LTCG rate and the 3.8% NIIT, for a combined 23.8% federal rate on the excess at the top bracket.

Does My Stock Qualify?

6. What type of company can issue QSBS?

A domestic C corporation. LLCs, S corporations, partnerships, and foreign corporations cannot issue QSBS directly. The company must have been taxed as a C corporation at the time of stock issuance and remain one through substantially all of the holding period. See the LLC and S-Corp guide for conversion strategies. The company must also satisfy:

• Gross assets test: at or below $50M (pre-OBBBA) or $75M (post-OBBBA) at issuance
• Active business test: at least 80% of assets in qualified operations
• Industry test: not in an excluded field such as professional services, financial services, hospitality, or farming

7. What is the gross assets test — and when does it apply?

The company's aggregate gross assets — essentially cash plus the adjusted basis of all property — must not exceed $50 million immediately before and after the stock issuance for pre-OBBBA stock ($75 million for stock issued on or after July 4, 2025). The test is applied at issuance, not at sale. Once your shares qualify, QSBS status locks in permanently — the company can grow past the threshold without affecting your exclusion. The timing trap: investors in later funding rounds (Series B, C) may find the company has already exceeded the threshold, disqualifying those shares even if earlier rounds qualified.

8. What is the active business test?

At least 80% of the company's assets (by value) must be used in the active conduct of one or more qualified trades or businesses throughout substantially all of the holding period. Cash counts as an active-business asset only if it is a working-capital reserve for near-term operations (within 24 months). The following industries are entirely excluded from qualified trade or business status:

• Professional services: health, law, engineering, accounting, financial services, consulting, athletics, and performing arts
• Banking, insurance, leasing, and finance
• Farming, mining, and hospitality (hotel and restaurant)

Borderline businesses (healthcare IT, fintech, software-plus-consulting) are analyzed under a facts-and-circumstances test. See the excluded industries guide for worked examples.

9. What is the "original issuance" requirement?

Your shares must be acquired directly from the corporation — not purchased on a secondary market from a prior shareholder. Shares issued to founders at formation, to investors in priced funding rounds, to employees at option exercise, and to advisors in exchange for services all satisfy original issuance. Shares purchased from an existing holder on a secondary platform (e.g., EquityZen) do not. Exceptions that preserve QSBS status: shares received by gift (§1202(h)(2)(A)), at death, incident to divorce, or through a partnership distribution (§1202(h)(2)(B)/(C)).

10. Do ISOs, NSOs, RSAs, or RSUs qualify for QSBS?

Each equity type differs:

• RSAs (restricted stock awards): yes, if the company meets the gross assets and active-business tests at grant. With an 83(b) election, the holding period starts at grant. Without it, the clock starts at vesting. See the 83(b) election guide.
• ISOs: the stock received at exercise can qualify; the five-year clock starts at exercise, not grant. Early exercise plus 83(b) election is the most common strategy. See the ISO and QSBS guide.
• NSOs: same mechanics as ISOs for §1202 purposes — stock issued at exercise can qualify, clock starts at exercise.
• RSUs: technically can qualify, but in practice almost always fail because RSU shares are issued at vesting — after most companies have exceeded the gross assets threshold. No 83(b) election is available for RSUs. See the early employee guide.

Holding Period and Timing

11. When does the five-year QSBS holding period start?

The starting point depends on how you received the stock:

• Direct stock purchases (founder stock, angel investments): date of issuance
• RSAs with 83(b) election: date of grant/purchase
• RSAs without 83(b) election: each vesting tranche starts on its vest date
• ISOs and NSOs: date of exercise — not grant date
• SAFEs and convertible notes: date of equity conversion in a priced round, not the date you signed the SAFE
• Gifted QSBS: the donor's original holding period tacks under §1202(h)(2)(A)

See the holding period guide for details on the 83(b) election, SAFE conversion, options exercise, and merger carryover scenarios.

12. How does the 83(b) election affect my QSBS holding period?

The §83(b) election starts the QSBS clock at grant instead of vesting for restricted stock. Without it, each vesting tranche starts its own five-year clock — a four-year vesting schedule means the last shares don't start the QSBS clock until year four from grant, requiring a total of nine years before all shares qualify. With a timely 83(b) election, all shares start the clock on the grant date, and every tranche can qualify in five years from grant. The election must be filed with the IRS within 30 days of grant — no extensions, no exceptions, and it cannot be undone. For ISOs, the 83(b) applies at early exercise of unvested options; the clock still starts at exercise, not grant.

13. What if I need to sell shares before the five-year mark?

Two paths depending on stock issuance date:

• Pre-OBBBA stock: no §1202 exclusion on a sub-five-year sale. However, §1045 allows you to defer the gain by reinvesting the entire net proceeds into new qualified small business stock within 60 days. The original holding period tacks onto the replacement stock — if you have held three years, you need only two more in the replacement stock to reach five.
• Post-OBBBA stock (issued July 4, 2025+): partial exclusions are available at three years (50%) and four years (75%), so a sub-five-year sale is not a complete loss.

14. What happens to my QSBS status in an acquisition or merger?

In a cash acquisition: §1202 applies directly — cash proceeds from a qualifying sale are excludable up to the cap. In a stock-for-stock reorganization under §368: §1202(h)(4) provides that the replacement stock carries over the QSBS status and holding period of the original shares, as long as the replacement stock itself meets the original-issuance requirement in the acquiring entity. In a mixed cash-and-stock deal: the cash portion (boot) may be taxable while the stock carries over. Critical trap: corporate share redemptions within two years before or after issuance can disqualify newly-issued shares for all shareholders under §1202(c)(3) — even those who did not participate. See the acquisition guide for the full analysis.

15. What is the pre-LOI planning window?

Strategies that shift QSBS gain to other taxpayers — gifting shares to family, contributing to a trust, donating to a DAF — must occur before the company signs a Letter of Intent (LOI) to be acquired or prices an IPO. Once an LOI is signed, the IRS can apply the anticipatory assignment of income doctrine, treating the gain as already accrued to the original holder regardless of transfers made after signing. The window can be very short — sometimes days between when deal terms are agreed and when the LOI is executed. Tender offer scenarios have an equivalent constraint: before the offer opens. Planning done well before a realistic transaction is on the table is fully protected.

Tax Mechanics

16. Does QSBS gain trigger the Alternative Minimum Tax (AMT)?

Depends on your stock's issuance date:

• Post-2010 stock (issued after September 27, 2010): no AMT preference item. The §57(a)(7) preference was eliminated by 2009 legislation for 100% exclusion stock. This covers the vast majority of startup founders and employees today.
• Post-OBBBA stock (issued July 4, 2025+): also no AMT preference item — OBBBA confirms this.
• Pre-2010 stock at the 50% or 75% exclusion tiers: an AMT preference item equal to 7% of excluded gain applies.

Note: QSBS AMT and ISO AMT are independent. An early exercise of ISOs may trigger AMT from the §56(b)(3) spread even when the underlying stock later qualifies as QSBS. See the QSBS and AMT guide for worked examples.

17. How do I report QSBS gain on my federal tax return?

On Form 8949: report the sale with adjustment code "Q" in column (f). Enter full proceeds and adjusted basis. In the adjustment column, enter the excluded gain as a negative number with code Q. The net gain (if any) flows to Schedule D as a long-term capital gain. If your total gain exceeds the exclusion cap, the excess is a regular long-term capital gain subject to normal rates. On Form 8960 (NIIT): excluded QSBS gain is not net investment income — do not include it. On state returns: California, Pennsylvania, Alabama, and Mississippi require you to add back the excluded gain and pay state tax on it. See the tax return guide for common filing mistakes and state add-back mechanics.

18. Can I gift QSBS shares to multiply the exclusion?

Yes. Under §1202(h)(2)(A), a gift of QSBS to another person preserves its qualified status: the donee's stock retains its QSBS character and the donor's holding period tacks. Each donee has their own separate per-taxpayer exclusion — up to $10 million or $15 million (or 10x their basis) from the same company. A founder approaching a $45 million post-OBBBA exit could gift equal thirds to themselves, a spouse, and an irrevocable trust before LOI, with each using the $15 million exclusion for a combined $45 million excluded. The annual gift tax exclusion in 2026 is $19,000; gifts above that draw on the $15 million lifetime exemption (made permanent by OBBBA). See the gifting and stacking guide for mechanics and the IRS May 2026 stacking warning.

19. Which states do not conform to the federal QSBS exclusion?

A summary by state:

• Non-conforming (0% exclusion): California (up to 13.3%), Pennsylvania, Alabama, Mississippi. See the California guide for planning strategies.
• Partial conformity: Hawaii (50% state exclusion)
• Newly conforming: New Jersey (effective January 1, 2026, under A4455)
• Full conformity: New York (city and state — see the NY guide), Washington (see the WA guide), Massachusetts (with OBBBA enhancements gap — see the MA guide), and most other states
• No state income tax: Texas, Florida, Nevada, Wyoming, South Dakota, Tennessee — state QSBS treatment is irrelevant

For the full conformity table, see the state conformity guide.

20. What happens to my QSBS treatment if I move states before a sale?

QSBS state tax treatment is generally determined by your state of residency on the date of sale. A California resident who moves to a conforming state — Texas, New York, Washington — before the sale can potentially eliminate California's tax on the federal exclusion. However, California aggressively audits high-income movers: the FTB can assert that gain accrued during California residency is California-source income, particularly if the company or transaction has California connections. A successful residency change requires a genuine change of domicile — not just a mailing address update — completed before a realistic sale is on the table. See the California guide for the residency change analysis and FTB audit risk factors.

Planning and Advisors

21. Can a trust hold QSBS?

Yes. Two scenarios:

• Grantor trusts: QSBS held in a grantor trust is treated as held by the grantor for federal income tax purposes. The exclusion applies at the grantor's level, using the grantor's per-taxpayer cap. The trust does not create a separate exclusion pool — it is the same taxpayer.
• Non-grantor irrevocable trusts: the trust is its own taxpayer and gets a separate exclusion cap. This is the mechanism for stacking via trusts: a §1202(h)(2)(A) gift transfer into an irrevocable trust creates an independent exclusion pool. The trust must receive shares from the donor directly (gift), not by purchase.

GRATs, CRTs, and Nevada/Delaware ING trusts are used for advanced QSBS planning in non-conforming states. See the trusts guide.

22. Can I donate QSBS shares to a charity or donor-advised fund?

Yes, and for philanthropic founders it is often better than using the §1202 exclusion alone on the donated portion. When you donate appreciated QSBS shares pre-sale to a donor-advised fund (DAF) or public charity:

• You receive a charitable deduction for the full fair market value of the shares (subject to the 30% AGI limit, with a five-year carryforward)
• The charity pays no capital gains tax when it sells
• You forgo the §1202 exclusion on the donated shares

The charitable deduction offsets ordinary income at rates up to 37%, while the §1202 exclusion only saves 20%/23.8% on capital gain. For large donations, the deduction route is typically more valuable. The donation must occur before the sale closes — and ideally before the LOI is signed. See the charitable planning guide.

23. Can a SAFE or convertible note qualify for QSBS treatment?

A SAFE is a contract, not stock — the five-year §1202 clock starts at equity conversion (when the SAFE converts to preferred stock in a priced round), not when you signed the SAFE. At conversion, the company's gross assets must also satisfy the applicable threshold — $50 million for pre-OBBBA conversions, $75 million for conversions on or after July 4, 2025. A SAFE signed when the company had $5 million in assets that converts after a Series B pushed assets to $80 million would fail the gross assets test under pre-OBBBA rules. Convertible notes follow the same logic: the QSBS clock and gross assets test apply at note conversion, not issuance. See the SAFE and convertible note guide for worked examples.

24. What does a fee-only financial advisor do that my CPA cannot for QSBS?

A CPA handles tax compliance after the fact: verifying qualification, preparing Form 8949, calculating the exclusion, and filing state returns. A fee-only financial advisor brings planning before the sale:

• Modeling exclusion scenarios for different transaction structures (all cash vs. mixed stock, partial tender vs. full exit)
• Quantifying gifting and charitable strategies that preserve the most after-tax value
• Sizing the pre-LOI action plan and coordinating execution with estate counsel
• Designing an investment policy statement for post-exit assets — tax-loss harvesting, direct indexing, muni ladder, alternative allocations
• Aligning the tax plan with the estate plan, insurance needs, and long-term cash flow

The most common reason QSBS exclusions are partially or fully lost is not that the shares fail to qualify — it is that planning began after the LOI was signed. See the QSBS advisor guide for interview questions and how to vet candidates.

25. When is it too late to do QSBS planning?

It depends on what type of planning:

• Strategies that move gain to other taxpayers (gifting, trusts, charitable donations): effectively too late once an LOI is signed. Post-LOI transfers are vulnerable to the anticipatory assignment of income doctrine.
• Documentation reconstruction: never too late. If you are missing an 83(b) election confirmation, a company attestation letter, or old cap table entries, gather them now. Missing records shift the burden of proof to you in an IRS audit but do not disqualify the exclusion on their own.
• Structural fixes (converting to C corporation, electing out of S corporation, changing equity type from RSUs to RSAs): must happen before stock issuance. A missed 83(b) election cannot be filed retroactively, and an S corporation's existing shares are permanently ineligible for §1202 treatment regardless of any later conversion to C corporation.

Talk to a QSBS advisor

Most QSBS planning decisions are irreversible — exclusions are locked in by facts at issuance, and the gifting window closes at LOI. A fee-only advisor who has worked through founder liquidity events can model your specific scenario and flag what needs to happen before the transaction timeline closes.