When you are sitting on a potential $40 million personal exit from your tech startup, understanding Qualified Small Business Stock (QSBS) eligibility can mean the difference between excluding a substantial portion of your federal capital gains and owing the IRS millions.
Section 1202 of the Internal Revenue Code provides one of the most powerful tax benefits available to venture-backed founders and early investors, allowing up to 100% exclusion of federal capital gains on qualifying stock. That benefit, however, applies only if a strict set of requirements is satisfied from issuance through exit. In other words, QSBS status is unforgiving: a single miss at any required step means no Section 1202 gain exclusion at all.
QSBS eligibility is determined at three distinct levels:
| The Shareholder level Who is eligible to claim the exclusion? |
The Company level Does the issuing company qualify as a “qualified small business”? |
The Stock level Was the stock properly acquired and held to meet Section 1202’s criteria? |
Failure at any one of these levels fully disqualifies the stock from Section 1202 treatment. This guide walks through every requirement that must be met under current law (for 2026), including the One Big Beautiful Bill Act (OBBBA) changes enacted on July 4, 2025.
The Three-Level Qualified Small Business Stock (QSBS) Eligibility Framework
QSBS eligibility is not determined by a single test. Instead, Section 1202 operates through three independent eligibility gates, each focused on a different aspect of the investment. Missing any requirement at any level could disqualify the stock from QSBS benefits:
| Eligibility Level | Purpose | Key Question |
|---|---|---|
| Shareholder requirements | Limits who may claim the exclusion | Who is eligible to benefit? |
| Company requirements | Targets active operating businesses below a certain size threshold | Does the issuer qualify? |
| Stock requirements | Ensures a genuine original investment and sufficient holding period | Was the stock properly acquired and held? |
Critical rule: All levels must be satisfied. Even if a corporation and stock meet the technical tests, the exclusion is unavailable if the taxpayer claiming the benefit isn’t an eligible holder (for example, a regular C corporation cannot claim QSBS, as explained below). Conversely, even an eligible shareholder gets no benefit if the issuing company or the stock itself fails to qualify on any required element.
Below we examine the detailed requirements at each level.
Shareholder Eligibility
Who Can Claim Qualified Small Business Stock (QSBS) Benefits?
Section 1202’s gain exclusion is limited to non-corporate taxpayers. In practice, this means the following types of taxpayers may directly claim the QSBS exclusion on a qualifying stock sale:
| Individual taxpayers – e.g. founders, employees, angel investors. | Trusts and Estates – both grantor and non-grantor trusts, simple and complex trusts, and estates are generally eligible holders (trustees/beneficiaries claim the exclusion on the trust’s behalf). |
Ineligible Claimants: C corporations (and any entity taxed as a C corporation) cannot claim the QSBS exclusion. QSBS is a shareholder-level tax benefit intended for individuals and pass-through entities. If the taxpayer selling the stock is a C corporation, the Section 1202 exclusion is unavailable regardless of how qualified the stock or issuer may be.
(Note: Corporate venture capital arms or corporate stockholders do not get the QSBS benefit – it’s designed for entrepreneurs and investors, not large corporate entities.)
Pass-Through Entities and Qualified Small Business Stock (QSBS):
Partnerships, LLCs taxed as partnerships, and S corporations can hold QSBS and pass the tax benefit through to their eligible owners. However, two additional timing rules apply for owners of pass-throughs:
- The owner must have held their interest in the pass-through entity on the date the entity acquired the QSBS, and
- The owner must continue to hold that interest through the date the QSBS is disposed of (sold by the entity or distributed out).
In essence, you only get to exclude your share of gain from QSBS held via a fund/LLC if you were an owner of the fund at the time of the original stock purchase and remained an owner until the stock was sold. New partners or shareholders who join after the QSBS was acquired will generally not be able to benefit from Section 1202 on that pre-existing investment.
(There are additional technical requirements in Section 1202(g) and related provisions to allocate the exclusion among owners, but those are beyond the scope of this summary.)
Company Eligibility
Does the Issuing Company Qualify as a “Qualified Small Business”?
Section 1202 imposes several tests to ensure the issuing company is an active domestic business below certain size limits. The major company-level requirements are described below.
Domestic C Corporation Requirement
Only stock issued by a domestic C corporation qualifies as Qualified Small Business Stock (QSBS). The issuer must be a C corporation (U.S. incorporated) for substantially all of the shareholder’s holding period. Stock of other entity types will not qualify:
| Eligible: Domestic C corporations (including Delaware C-corps, etc.). |
Not eligible: S corporations (stock issued while an S-corp never qualifies), LLCs or partnerships (not corporations), and foreign corporations. |
Tip: If a company initially operated as an S corporation or LLC, converting to a C corporation allows new stock issuances after the conversion to qualify as QSBS (assuming other tests are met). However, any equity issued before the conversion (when the entity was an S corp or LLC) is forever disqualified – it cannot be retroactively “cured”.
For example, founders’ shares issued while the company was an S-corp will not become QSBS even if the company later converts to C-corp; only stock issued post-conversion could qualify.
Aggregate Gross Assets Test
At the time of each stock issuance (and immediately after the issuance), the corporation’s aggregate gross assets must not exceed a certain threshold. This is essentially a size test measuring the company’s assets when the stock is issued:
| For stock issued on or before July 4, 2025: The total gross assets of the company must have been $50 million or less at issuance. | For stock issued after July 4, 2025: The OBBBA raised the limit to $75 million (with inflation indexing for issuances in 2027 and beyond). |
“Aggregate gross assets” includes the value of all the company’s assets:
- Cash and cash equivalents, and
- The adjusted tax basis of all other property held by the corporation,
plus the proceeds from the stock issuance being tested. In other words, if a new investment brings in $10M cash, the post-issuance asset total must still be under the cap. If property was contributed to the corporation, special rules value it at fair market value (to prevent using a low tax basis to appear under the limit).
This assets test is only applied at the time of issuance (including immediately after). Once a stock issuance has met the requirement, subsequent growth of the company’s assets above $50M/$75M does not retroactively disqualify that stock. The company just needs to be below the threshold when the stock was issued. However, each new issuance of stock must be tested against the limit at that time – a large funding round can fail QSBS if it pushes assets above $75M at closing (see Trap #4 below).
Active Business Requirement (80% Test)
During substantially all of the shareholder’s holding period of the stock, at least 80% of the corporation’s assets (by value) must be used in the active conduct of one or more qualified trades or businesses. This rule is meant to ensure the company is an operating business, not just an investment vehicle or cash box.
Assets that count toward this 80% active-use test generally include:
| Operating business assets – property and equipment used in the business, intellectual property, etc., used to generate business income. | Working capital held as cash or equivalents, to the extent that it is reasonably expected to be used within 2 years to finance research or experimental expenditures, or needs for operating the business. (In other words, a reasonable amount of cash earmarked for near-term business use counts as active.) | Assets for future R&D or business expansion – for example, funds set aside for a planned product development or opening a new facility in the next two years can count as used in active conduct. |
Important limitation – the 50% rule for long-term cash: After the corporation has been in existence for at least 2 years, no more than 50% of its assets can be treated as “active” by reason of the working capital exception.
This prevents companies from indefinitely hoarding large cash piles while still claiming to meet the 80% active business test. In practice, excessive long-term cash or investment holdings can jeopardize Qualified Small Business Stock (QSBS) eligibility if that idle cash exceeds the allowed buffer (50% of assets after 2 years) and isn’t deployed into the business. Growing startups should be mindful that after the early startup period, they need to either invest cash in the business or potentially lose QSBS qualification.
Qualified Trade or Business Requirement
Not every type of business qualifies, even if it’s small. Section 1202 explicitly excludes several categories of businesses from issuing QSBS. The exclusion targets service-oriented and other businesses where the tax benefit is deemed inapplicable. Excluded trades or businesses (which cannot be “qualified trades or businesses” for QSBS) include:
| Professional Services | For example, health/medical services, law, accounting, actuarial science, consulting, engineering, architecture, performing arts, or athletics. These fields are service businesses where the principal asset is the skill or reputation of the employees (which is also a separate exclusion category). |
|---|---|
| Financial Services | Banking, insurance, financing, leasing, investing, or brokerage services. (Investment funds and financial trading businesses are excluded by this rule.) |
| Natural Resource Extraction | Farming or agriculture, mining, oil and gas extraction, or timber production. |
| Hospitality | Running hotels, motels, restaurants, or similar businesses. |
| Any business where the principal asset is the reputation or skill of one or more employees. | This is a catch-all that overlaps with many of the above service categories, essentially preventing personal-service businesses from qualifying. |
Most typical venture-backed technology companies (software, SaaS, hardware, biotech, etc.) do not fall into these excluded categories and therefore can qualify as long as they meet the other requirements. But, for example, a startup law firm or a personal consulting practice would not qualify as a “qualified trade or business” under Section 1202.
Additional Asset Restrictions
Section 1202 imposes two specific limitations on a corporation’s assets to ensure it’s not an investment-type company:
| Non-business real estate: No more than 10% of the total value of the corporation’s assets can consist of real property not used in the active business. In other words, a company can own real estate for its offices or operations, but it cannot hold significant excess real estate that’s not used in the business (e.g. land or buildings held for investment) beyond a 10% threshold. If more than 10% of assets are unused real estate, the company fails to qualify. |
Portfolio stock or securities: No more than 10% of the company’s assets can consist of stock or securities in other companies that are not its subsidiaries (measured net of any associated liabilities). This prevents a “shell” company that simply holds investments in other companies. However, stock of a subsidiary (generally, >50% owned) is not counted toward this 10% cap. So a holding company can still qualify if it is essentially a parent of active subsidiaries – but a company that just passively holds minority investments in various businesses cannot exceed 10% of its assets in those investments. |
These asset tests apply throughout the holding period (they are part of the 80% active business test). Practically, startups rarely bump against the 10% real estate limit, but the 10% limit on portfolio securities is important if the company starts making investments or parking surplus cash in stocks/bonds – that should be avoided to preserve Qualified Small Business Stock (QSBS) status.
Stock-Specific Requirements
How You Acquire and Hold QSBS Matters. Even if the shareholder and the company meet all the above criteria, the stock itself must also satisfy certain conditions to be considered “Qualified Small Business Stock.” These requirements focus on how the stock was acquired and how long it was held.
Original Issuance Requirement
The QSBS exclusion only applies to stock acquired at original issue – essentially, directly from the company (the issuer) in exchange for money, property, or services. You must have obtained the shares in one of the following ways to potentially qualify:
- By cash purchase from the corporation (e.g. you paid money as an investor in a stock issuance or exercise of options).
- By contributing property to the corporation (other than stock) in exchange for its stock, valued at fair market value at the time. For example, you swapped some equipment or IP for shares as part of a founders’ round – that counts.
- As compensation for services you performed for the corporation (but not as part of an underwriting deal). Stock granted to founders or employees in exchange for their services can be QSBS, as long as it’s a direct issuance by the company. (The underwriter exception just means an investment bank that temporarily holds stock in an offering can’t claim QSBS on those underwriting shares.)
Non-qualifying acquisitions: Crucially, stock not acquired from the corporation at original issue will not qualify. Common scenarios that fail this test include:
- Secondary market purchases: If you bought the shares from another shareholder (not from the company itself), that stock is not QSBS in your hands. For instance, buying shares from a founder or another investor, rather than subscribing in the company’s stock issuance, disqualifies the stock (because it’s no longer an original issuance to you).
- Stock received in exchange for other stock, except in certain tax-free reorganizations. Generally, swapping one stock for another breaks the “original issuance” chain. However, Section 1202 has provisions (Section 1202(h)) that allow continuity of QSBS treatment in specific merger or reorganization situations. For example, if your QSBS shares in Company A are exchanged for shares of acquiring Company B in a tax-free merger, and Company B is a qualified small business, you might be able to treat the new shares as QSBS with tacked holding period. These exceptions are narrow and technical – the key point is that most stock-for-stock swaps or contributions will reset QSBS status unless a special rule applies.
| Planning note: If you are planning to gift QSBS or pass it through an estate, good news – transfers by gift or at death are not considered “purchases” that break QSBS status. The recipient can step into your shoes on holding period and still qualify. However, be careful with any corporate restructuring or secondary sales as those may forfeit QSBS treatment if not done under a qualifying rule. |
Holding Period Requirements
Duration of Holding: Section 1202 has always required a minimum holding period for the stock before a sale in order to claim the exclusion. Until recently this was a more-than-five-year holding period in all cases. The OBBBA (2025) introduced a graduated exclusion for shorter holds, but only for newly issued stock going forward. The holding period rules now depend on when the stock was acquired:
| Stock Issued On or Before July 4, 2025: Such stock falls under the pre-OBBBA rules. Generally, the stock must be held for more than 5 years to get any exclusion. If sold earlier, no QSBS exclusion applies (though one could use a Section 1045 rollover if reinvesting in new QSBS, to defer gain). The percentage of gain that can be excluded for qualifying five-year stock depends on the acquisition date: |
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| Stock acquired before Feb. 18, 2009: 50% exclusion (and the remainder taxed at 28% with AMT preferences). | Stock acquired Feb. 18, 2009 – Sept. 27, 2010: 75% exclusion. | Stock acquired after Sept. 27, 2010: 100% exclusion of gain (this 100% exclusion was later made permanent for QSBS by Congress). |
In other words, as of 2026 virtually all QSBS held 5+ years will qualify for a 100% federal gain exclusion, since it’s likely stock was acquired after 2010 in most cases. (The 50% and 75% rates are legacy rules.) Bottom line: If your QSBS was issued before July 5, 2025 and you hold it for five years, you can exclude at least 50% – and most likely 100% – of the gain, depending on issue date.
| Stock Issued After July 4, 2025 (OBBBA Rules): For Qualified Small Business Stock (QSBS) acquired on July 5, 2025 or later, new graduated holding period rules apply: |
||
| Held at least 3 years (but less than 4): eligible for 50% exclusion of the gain. | Held at least 4 years (but less than 5): eligible for 75% exclusion of the gain. | Held 5 years or more: eligible for 100% exclusion (full benefit, same as before). |
These graduated benefits mean that for post-OBBBA stock, an earlier exit can still give a partial Section 1202 benefit (rather than none at all). For example, a qualifying sale after 3.5 years would exclude 50% of the gain from income, whereas under old law it would exclude 0%. This change was designed to incent investment by providing some reward for shorter holds.
Tax treatment of non-excluded gain: If you sell QSBS and some portion of the gain is not excluded (e.g. you sold after 3 years so 50% is taxable), that taxable portion is generally subject to a special 28% capital gains rate (not the usual 20% rate) under Section 1202’s rules. In addition, the taxable portion may be subject to the 3.8% Net Investment Income Tax (NIIT), depending on the taxpayer’s overall income and situation. Effectively, the non-excluded gain could face up to a 28% + 3.8% = 31.8% federal rate. The excluded portion of QSBS gain is not taxed at all, and notably is not subject to NIIT either. (Also, QSBS gain that is excluded is no longer a preference item for Alternative Minimum Tax purposes, due to changes in the AMT rules.)
For a fully excluded gain (100% exclusion), the federal tax on that gain is truly zero. For a 50% exclusion, the effective federal tax rate on the total gain would be about 15.9% (half the gain taxed at ~31.8%). For a 75% exclusion, it would be about 7.95% effective. This is still hugely beneficial compared to the normal 23.8% long-term capital gains + NIIT rate on all the gain. For instance, fully excluding a $40 million gain could avoid approximately $9.5 million in federal tax (using the 23.8% LTCG+NIIT rate as a baseline, since 23.8% of $40M ≈ $9.52M). Thus, meeting the QSBS requirements can literally save founders/investors millions in taxes on a big exit.
QSBS Redemption Restrictions: When Buybacks Can Disqualify Your Stock
Even if all the above conditions are met, there are anti-abuse “redemption” rules that can unexpectedly disqualify otherwise qualifying stock from QSBS treatment. These rules focus on stock redemptions (buybacks) by the company around the time of a new stock issuance. They aim to prevent companies from gaming the system by redeeming shares (cashing out some investors) and replacing them with “new” QSBS shares, without actually bringing in new investment.
In practice, these restrictions can trip up founders and companies because they apply even to legitimate buyback transactions (not just obvious abuses). Important: if your company engages in certain stock redemptions near the time new shares are issued, the new shares could lose Qualified Small Business Stock (QSBS) eligibility – even if the company otherwise qualifies as a small business and the investors intend to hold 5+ years. Below we explain the two redemption tests in Section 1202(c)(3), each with its own timing window and triggers.
1. The Four-Year Related-Party Redemption Rule
The first test focuses on redemptions involving the same shareholder who is receiving the new QSBS (or certain related persons to that shareholder). It’s essentially a shareholder-specific anti-churning rule.
- Testing window: Begins 2 years before the stock’s issuance and ends 2 years after the issuance (for a total four-year span). In other words, look at the period from T–2 years to T+2 years, where T is the date the stock was issued to the taxpayer.
- Disqualifying event: If, during this 4-year period, the corporation redeems (buys back) more than a de minimis amount of its stock from the taxpayer (who got the new stock) or from any person related to that taxpayer, then the newly issued stock will not qualify as QSBS. Essentially, the investor can’t cash out even a small portion and simultaneously get QSBS on new shares – if the company redeemed stock from them (or their family, etc.), any new shares they got in that timeframe are tainted.
- De minimis threshold: The regs define this as a redemption that exceeds $10,000 AND amounts to more than 2% of the taxpayer’s stock holdings (including related persons’ holdings). Redemptions below that level (very small shareholders or tiny transactions) won’t trigger disqualification. In practical terms, however, most founder or investor redemptions are well above these tiny thresholds, so for real-world scenarios any meaningful buyback from the individual will trigger the rule. (E.g. redeeming $100,000 of a founder’s shares would certainly be more than de minimis if the founder owns more than ~$5 million of stock, which is likely.)
If this rule is triggered, the newly issued stock received by that taxpayer is completely disqualified from QSBS – even if all other requirements (active business, holding period, etc.) are met. Importantly, this is a personalized taint: it affects the stock held by that particular investor. Other investors’ stock wouldn’t be affected unless they too had related redemptions.
Why this matters for founders: This related-party redemption rule often causes problems in scenarios like:
| Founder liquidity programs: If a founder sells some of their shares back to the company (for personal liquidity) and around the same time the company issues new shares (say, in a financing or option exercise to that founder), the new shares could be disqualified. |
Pre-financing cleanup buybacks: Sometimes companies repurchase shares from departing founders or early investors just before a new funding round. If the new round involves those same parties, watch out. |
| Company repurchases tied to employment transitions: If an employee-shareholder’s stock is bought back when they leave, and they receive new stock or options around that period, it could taint the new stock. |
Early partial cash-outs followed by new issuances: Any situation where an individual investor gets to sell some shares to the company and also is buying or receiving new shares in proximity can invoke this rule. |
In all these cases, even a relatively small redemption can taint the new QSBS for that person – the statute does not provide a large buffer. Founders should be extremely careful when structuring liquidity events for themselves if they plan to raise new money or issue new stock within two years.
2. The Two-Year Significant Redemption Rule
The second test looks at company-wide redemption activity in a narrower window, regardless of who the sellers are. It’s designed to catch situations where a company is broadly redeeming stock (paying out cash to shareholders) around the same time new stock is being issued.
- Testing window: Begins 1 year before the new stock issuance and ends 1 year after the issuance (total two-year span). So, from T–1 year to T+1 year around the issuance date.
- Disqualifying event: If during this two-year period the corporation redeems (directly or indirectly) stock and the total value of all such redemptions exceeds 5% of the aggregate value of all the company’s stock at the beginning of the two-year period, then all stock issued during that period can be disqualified from QSBS (subject to a minor de minimis exception discussed below). In short, excessive buybacks (over 5% of company value) in a two-year span contaminate any new shares issued in the same span.
- This 5% threshold is measured by value, and importantly, the denominator is the company’s value at the start of the period (which might be much lower than at the end, if the company is growing fast). So a startup that doubles in value could more easily trip the 5% rule than one might think, because the baseline is the older, lower valuation.
- Example: If the company was valued at $100M one year ago, a series of redemptions totaling more than $5M in the last year would break the 5% rule (since $5M is 5% of $100M). Even if the company is worth $200M by the end of the year, the test uses the $100M starting value. So they could disqualify new stock because $6M of buybacks (which is only 3% of the $200M value now) is 6% of the $100M value a year ago.
- Scope: This rule is not about who sold. It doesn’t matter which shareholders the company redeemed stock from. It could be entirely from investors, or entirely from employees, or a mix. It’s the aggregate amount that counts. If the threshold is exceeded, all stock issuances in that ±1-year window are potentially disqualified (unless an issuance falls under an exception).
- De minimis exception: Similar to the first test, regulations provide that redemptions are ignored if they do not exceed $10,000 and 2% of the company’s stock. This typically excludes trivial redemptions (like cashing out a tiny fractional share or a very small shareholder). But any significant redemption program will easily cross this line.
In practical terms, this “significant redemption” rule often comes into play with tender offers or secondary liquidity rounds funded by the company’s own balance sheet. For instance, if a startup uses some of its cash (or raised funds) to buy back shares from early investors or employees (perhaps to provide them liquidity) around the time of a new funding round, this can exceed the 5% threshold and thereby disqualify the shares issued in that funding round from QSBS.
Why these rules commonly break QSBS in venture financings:
In the venture world, it’s not uncommon for a company to facilitate liquidity for founders or early investors during a financing (either via company buyback or structured secondary). If the company is the one purchasing those shares (rather than a new third-party investor), Section 1202 treats it as a redemption that could taint new stock. For example:
| A startup raises a Series B and uses part of the funds to repurchase shares from a co-founder who is leaving. That Series B stock (being issued around the same time) could lose QSBS if the repurchase is >5% of value. | A company does a tender offer to all employees to buy back some shares, within a year of issuing new shares (say in a Series C). If total buybacks exceed 5% of prior value, all the new shares from the Series C round are non-QSBS. | Any aggregate redemption >5% – even if spread across many small sellers – within ±1 year of an issuance is dangerous. |
One key saving grace: These redemption rules do not retroactively disqualify stock that was issued before the redemption window. They only apply to stock issued during the window. So if you have QSBS from an earlier round, a later redemption won’t turn that old stock into a pumpkin. It only taints new stock issued in what we might call a “contaminated” period of heavy redemptions. Timing is critical – careful planners sometimes ensure no new stock is issued for a period before/after any large buyback program, to protect QSBS on other issuances.
Important limitation – carve-out for certain employee redemptions:
There are exceptions in Section 1202 for redemptions of stock from shareholders who obtained their stock as employees or directors, if the redemption is in connection with their separation from service (retirement/termination) or other limited circumstances like death, disability, or divorce. These specific redemptions can be excluded from counting toward the disqualification tests (so a buyback of stock from a departing employee might not trigger the rule if it meets the exemption criteria). However, the rules here are nuanced and outside the scope of this summary – companies should consult tax counsel when planning any buybacks to see if an exemption applies.
Key takeaway for founders and investors:
Qualified Small Business Stock (QSBS) eligibility can be lost not only because of what your company does, but when it does it. Company-funded liquidity programs, buybacks, and redemptions must be analyzed in advance for QSBS impact, especially if new shares are being issued around the same time. Coordinate QSBS planning with your financing timelines and any secondary liquidity events. Failing to do so can quietly eliminate one of the most valuable tax benefits available to startup stakeholders.
Key Changes Under the OBBBA (Effective July 4, 2025)
The One Big Beautiful Bill Act (OBBBA), enacted July 4, 2025, made several significant updates to Section 1202. These changes generally apply only to stock issued on or after the date of enactment (July 4, 2025). QSBS issued earlier continues under the prior rules. Here is a summary of the key changes for post-OBBBA stock (with 2026 being the first full year these rules are in effect):
| Change | Prior Law | Current Law (2026+) |
|---|---|---|
| Minimum holding period | 5+ years required (all-or-nothing exclusion) | 3+ years for 50% exclusion; 4+ years for 75%; 5+ years for 100%. Graduated exclusion percentages now apply. |
| Per-issuer gain exclusion cap | $10 million (lifetime, per investor per company) | $15 million (lifetime, per investor per company), indexed for inflation starting in 2027. (10× basis alternative cap remains unchanged.) |
| Basis multiplier cap | 10× basis of QSBS stock disposed (alternative cap) | Unchanged. Still the greater of $15M or 10× basis is excludable. |
| Aggregate gross assets threshold | $50 million or less before/after issuance | $75 million or less before/after issuance, inflation-indexed from 2027 onward. Allows larger startups to qualify. |
Two notes on these changes:
- The per-issuer exclusion cap means that for each qualified small business, an individual taxpayer can exclude up to the greater of the dollar limit or 10 times their basis in the stock. Under prior law this was greater of $10M or 10× basis (for 100% exclusion stock); now for post-2025 stock it’s $15M or 10×. The increase acknowledges inflation since the $10M cap was set in the ‘90s. For very large gains, the basis multiple often provides a higher cap anyway, but many founders with relatively low basis will benefit from the extra $5M of exclusion.
- The shorter holding-period exclusions (50% at 3 years, 75% at 4) do not apply retroactively to older stock. So stock you got in 2024 still needs a >5-year hold for any exclusion. But stock you acquire in 2026, for example, could be sold in 2029 for a 50% exclusion if needed (though selling in 2031 or later would give 100%).
Overall, these OBBBA changes expand the availability and value of QSBS benefits – letting investors potentially exit sooner with some tax break, allowing bigger companies (up to $75M assets) to qualify, and increasing the amount of gain that can be excluded per company. This aligns the incentive with modern startup trajectories (which often have valuations that exceed $50M before five years, or exits in 3–4 years in some cases). The intent is to continue encouraging investment in small businesses by making QSBS more flexible and generous.
Common Qualified Small Business Stock (QSBS) Disqualification Traps
Even with careful planning, there are some common scenarios where founders and investors inadvertently lose Qualified Small Business Stock (QSBS) eligibility. Watch out for these “tripwires” that frequently disqualify otherwise qualifying stock:
Trap #1: S Corporation History.
If your company spent time as an S corporation (or LLC) before converting to a C corp, remember that stock issued during the S-corp/LLC period is never QSBS. Only stock issued after the conversion to a C corporation can qualify. Founders sometimes assume their old shares will qualify once they switch to a C corp – they won’t. (If needed, a strategy is to issue new additional stock after converting to C corp, so that at least that new portion can start the 5-year QSBS clock.) Similarly, if a QSBS-qualified C corporation later elects S-corp status, it will terminate QSBS qualification going forward – potentially blowing the benefit for stockholders if not reversed in time.
Trap #2: Excessive Cash Holdings.
Failing the “80% active business” test due to too much idle cash or investment assets is a real risk, especially for companies that raise big rounds and then sit on the funds. After 2 years, you can’t count more than 50% of assets as working capital under a future business plan. If the company isn’t deploying capital into business operations or R&D as it grows, it could slip under the 80% threshold. Example: A startup raises $100M but only uses $30M in its business and parks $70M in treasuries long-term – it may flunk the active business requirement (only $30M of $100M assets active = 30%, not 80%). Plan fundraising and spending in a way that keeps the bulk of assets tied to active use in the business (or clearly earmarked for near-term use).
Trap #3: Redemptions Around Issuance.
As discussed above, company stock buybacks near the time of new stock issuances can silently destroy QSBS status for the new shares. This is especially common in venture deals where the company facilitates some secondary sales or does a cleanup of the cap table. If you don’t monitor the 5% redemption threshold and the 4-year individual window, you might issue stock that ends up non-qualifying. Always check Section 1202(c)(3) before any planned redemption or investor liquidity program – a slight adjustment in timing (e.g. closing a redemption after a new round, or using a third-party buyer instead of a company buyback) might preserve QSBS.
Trap #4: Exceeding Asset Thresholds Mid-Round.
The $50M (or now $75M) gross assets test includes the value immediately after issuance, counting the money raised. A financing that takes a company over the limit means the stock issued in that round will not be QSBS. Companies near the cusp of the threshold must be careful. For instance, if a company has $40M in assets and is about to raise $15M, the post-raise assets would be $55M – above the old $50M cap (if before 2025). That round’s stock wouldn’t qualify. Under the new $75M cap it’s safer, but large late-stage rounds can still push a company over. One workaround is doing multiple closings or tranches to keep the immediate post-issuance assets under the limit for each issuance. Another is to invest some cash into tangible assets before the issuance (reducing cash but increasing basis of assets) – though fair market value rules limit basis gaming. The key is to calculate the post-money assets and ensure compliance at each issuance.
The Bottom Line
QSBS may be the most valuable tax planning opportunity available to venture-backed founders and early investors in startups. At top federal rates, fully excluding a large gain (up to the $10M or $15M per-company cap, or more with 10× basis) can save a tremendous amount in taxes. For example, excluding a $40 million gain could avoid roughly $9–10 million of federal tax that would otherwise be due. This can dramatically increase the effective proceeds you keep from an exit.
However, obtaining this benefit requires advance planning and careful maintenance of the stock’s qualifying status. It’s not enough to form a C-corp and hope for the best – you must mind the details over several years: corporate form, asset levels, business operations, how you acquire the shares, how long you hold them, and corporate actions like redemptions or conversions. It’s wise to periodically audit your QSBS status (or potential status) as your company grows, and certainly before any major transactions.
Also note that state tax treatment of QSBS varies. Some states fully conform to the federal Section 1202 exclusion (meaning you pay no state tax on the excluded gain), but other states do not. For instance, as of January 2026, California does not allow any QSBS exclusion – you’ll owe state tax on the full gain. Pennsylvania, Mississippi, and Alabama also do not conform (New Jersey is starting to conform in 2026). Many other states do follow the federal rule or have partial exclusions. So a founder in California might pay 13.3% state tax on a gain that is entirely free of federal tax. The difference in state policies can be worth millions as well. Plan your exit with both federal and state tax in mind – in some cases, strategies like relocating prior to a sale or structuring as a non-resident trust might be considered, though those come with their own complexities.
In summary, understanding whether your stock qualifies for QSBS – and structuring your ownership and exit accordingly – can materially change the outcome of a successful liquidity event. With the post-OBBBA rules in 2026 and beyond, QSBS is more accessible than ever, but it still demands attentive compliance with the requirements at all three levels: shareholder, company, and stock. Given the potential tax savings at stake, founders and investors should start planning early in the life of the company to preserve QSBS eligibility, and consult tax advisors when making significant decisions that could impact that status. The reward, if you get it right, is a tax bill at exit that could be a fraction of what it might otherwise be – truly one of the best tax incentives for entrepreneurship.
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Understanding whether your stock qualifies could be worth millions. Connect with our founder to explore how your specific situation aligns with QSBS requirements and develop a comprehensive pre-exit tax strategy.
