IRC 1202 Qualified Small Business Stock: QSBS Gain Exclusion and Active Business Test Practitioner Guide

Overview of the IRC 1202 Gain Exclusion Regime

Congress enacted IRC Section 1202 to channel private equity investment toward small domestic C corporations at a stage of development when those companies most need outside capital. The mechanism is a gain exclusion: a taxpayer who holds "qualified small business stock" (QSBS) for more than five years may exclude a significant portion -- potentially all -- of the gain realized on the sale or exchange of that stock from federal gross income. The excluded gain is not merely deferred; it is permanently excluded from federal income, subject to the per-issuer cap and other limitations described throughout this guide.

The exclusion is not automatic. Every element of the qualification chain must be satisfied at the right point in time: the corporation must meet the gross asset test at issuance, must satisfy the active business requirement throughout substantially all of the holding period, and the stock itself must be acquired at original issuance from a domestic C corporation. A failure at any link in the qualification chain -- even one that occurs years after the stock is issued -- can eliminate the exclusion entirely for a taxpayer who has held the stock for a decade.

The One Big Beautiful Act of 2025 (OBBBA), effective approximately July 4, 2025, made significant changes to IRC 1202 including a new holding-period-based tier structure, a reportedly higher per-issuer gain cap, and a reportedly higher gross asset threshold. All OBBBA-specific figures in this guide must be verified at IRS.gov and with independent counsel, as these provisions are recently enacted and implementation guidance may be pending. The pre-OBBBA rules continue to govern stock acquired before the OBBBA effective date; practitioners must identify the acquisition date of every QSBS position before determining the applicable exclusion regime.

This guide addresses the full statutory framework of IRC 1202 as a practitioner reference. It does not substitute for current IRS guidance, Treasury Regulations, or qualified tax counsel. Verify every statutory threshold, percentage, and procedural requirement at IRS.gov before applying these rules to any actual transaction.

Historical Exclusion Percentages: Pre-OBBBA Three-Tier Schedule

Under pre-OBBBA IRC 1202, the exclusion percentage for qualifying QSBS gain was determined entirely by the date on which the taxpayer acquired the stock, provided the stock was held for more than five years. There were three acquisition-date tiers (verify exact boundary dates and applicable percentages at IRS.gov, as the statutory text controls):

Tier 1: Approximately 50 Percent (Pre-February 18, 2009 Acquisitions)

QSBS acquired before February 18, 2009 qualified for a gain exclusion of approximately 50 percent of the gain recognized on the sale or exchange, subject to the per-issuer cap. The non-excluded 50 percent of gain was recognized and taxable. As discussed in the rate trap section below, that non-excluded gain was potentially subject to a maximum rate of approximately 28 percent rather than the standard preferential long-term capital gains rate; verify the applicable rate treatment at IRS.gov. This tier was the original enactment of IRC 1202 and applied to stock issued in the early years of the small business stock exclusion regime.

Tier 2: Approximately 75 Percent (February 18, 2009 through September 27, 2010)

QSBS acquired on or after February 18, 2009 and before September 28, 2010 qualified for an exclusion of approximately 75 percent of the qualifying gain. This enhanced rate was enacted as part of the American Recovery and Reinvestment Act of 2009 to encourage investment in small businesses during the financial recovery period. The non-excluded 25 percent was still recognized and potentially subject to the elevated rate discussed below. Verify the precise acquisition-date boundaries and applicable exclusion percentage at IRS.gov.

Tier 3: Approximately 100 Percent (Post-September 27, 2010 Acquisitions)

QSBS acquired on or after September 28, 2010 and before the OBBBA effective date (verify at IRS.gov) qualified for a gain exclusion of approximately 100 percent of the qualifying gain, subject to the per-issuer cap. For stock qualifying for full exclusion, no gain is recognized for federal income tax purposes. This 100 percent tier was made permanent by the Protecting Americans from Tax Hikes (PATH) Act of 2015. The 100 percent exclusion tier also eliminated the AMT preference issue that applied to the 50 percent and 75 percent tiers (as discussed further below). Verify the precise acquisition-date cutoffs and any applicable transition rules at IRS.gov.

OBBBA 2025 Changes: New Holding-Period Tiers, Raised Cap, and Raised Gross Asset Threshold

The One Big Beautiful Act (OBBBA), signed into law and effective approximately July 4, 2025, restructured IRC 1202 in ways that practitioners must carefully distinguish from the pre-OBBBA framework. The OBBBA changes apply to QSBS acquired on or after the OBBBA effective date (verify the precise effective date at IRS.gov and consult independent counsel, as these provisions are recently enacted and implementation guidance may be pending). Pre-OBBBA stock -- acquired before the effective date -- continues to be governed by the pre-OBBBA rules described in the preceding section.

New Holding-Period-Based Tiered Exclusion Schedule

The most significant structural change under the OBBBA is the introduction of a holding-period-based exclusion schedule that replaces the acquisition-date schedule for stock acquired after the OBBBA effective date. Based on available research at the time of publication, the new schedule operates approximately as follows (verify current figures at IRS.gov and consult independent counsel, as these provisions are recently enacted and implementation guidance may be pending):

• Approximately 50 percent exclusion for QSBS held for at least 3 years but fewer than 4 years at the time of sale
• Approximately 75 percent exclusion for QSBS held for at least 4 years but fewer than 5 years at the time of sale
• Approximately 100 percent exclusion for QSBS held for 5 or more years at the time of sale

This is a fundamental structural shift: under pre-OBBBA law, the exclusion percentage was fixed at acquisition and holding for more than five years was the only timing threshold. Under the OBBBA framework (verify at IRS.gov), partial exclusions become available earlier (at three and four years of holding), which may create planning opportunities for investors who cannot or choose not to hold to the five-year mark. However, the 100 percent exclusion remains tied to a five-year holding period for OBBBA stock as well -- verify this at IRS.gov. Do not treat any holding period or percentage figure in this summary as authoritative; the statutory text and IRS guidance control in all respects.

Raised Per-Issuer Gain Cap

The OBBBA reportedly raised the dollar floor of the per-issuer gain exclusion cap. Research suggests the new cap may be approximately $15 million (compared to the pre-OBBBA $10 million floor), or 10 times the taxpayer's adjusted basis in the QSBS sold, whichever is greater. Verify the current cap amount at IRS.gov and consult independent counsel, as these provisions are recently enacted and implementation guidance may be pending. The 10-times-basis alternative continues to operate as a second limit, meaning that for taxpayers with a large adjusted basis in QSBS, the effective cap may exceed the dollar floor.

Raised Gross Asset Threshold

The OBBBA reportedly raised the gross asset threshold for a corporation to qualify as a "qualified small business" at the time of QSBS issuance. Research suggests the new threshold may be approximately $75 million (compared to the pre-OBBBA $50 million ceiling). Verify the current threshold at IRS.gov and consult independent counsel, as these provisions are recently enacted and implementation guidance may be pending. This change expands the universe of corporations that may issue qualifying QSBS, potentially including later-stage growth companies that previously exceeded the gross asset ceiling before their issuance events.

Dual-Track Planning Workflow: Applying the Right Rule Set in 2026

The OBBBA creates two concurrent rule sets, and the issuance date of each lot of stock is the only fact that determines which set applies. A client who holds stock issued across multiple rounds may have pre-OBBBA and post-OBBBA lots in the same portfolio, each governed by different exclusion percentages, thresholds, and caps. Applying the wrong rule set to the wrong lot is the most consequential analytical error in current QSBS practice.

The first step for any practitioner advising a QSBS holder in 2026 is to inventory all positions by lot and issuance date before applying any rule. For each lot, the analysis branches as follows:

• Stock issued on or before July 4, 2025 (pre-OBBBA): Apply the established pre-OBBBA rules -- the five-year holding period, the approximately 100 percent exclusion for post-September 27, 2010 acquisitions (verify at IRS.gov), the pre-OBBBA gross asset threshold, and the pre-OBBBA per-issuer cap. Track the holding period start date (confirm whether an IRC 83(b) election was made), project the qualifying exclusion date, and monitor ongoing active business test compliance. Advise clients that the OBBBA does not retroactively alter the exclusion for this stock.
• Stock issued after July 4, 2025 (post-OBBBA): Apply the OBBBA regime. Verify all OBBBA-specific tiers, thresholds, and caps at IRS.gov and in the enacted OBBBA statute before advising, as these provisions are recently enacted and implementation guidance may be pending. Document all OBBBA-specific assumptions in the client file and flag for re-confirmation as guidance develops.

Document the issuance date, gross asset total at issuance, active business classification, and acquisition method (original issuance or secondary) for each lot contemporaneously. Reconstruction at the time of sale is the most common IRC 1202 failure mode. Verify all thresholds and figures at IRS.gov.

IRC 1202(c): Definition of Qualified Small Business Stock

IRC 1202(c) defines "qualified small business stock" through a series of requirements that must all be satisfied. A deficiency in any element disqualifies the stock from the IRC 1202 exclusion entirely. Practitioners must verify each element against the current text of IRC 1202(c) and applicable Treasury guidance at IRS.gov.

Domestic C Corporation Requirement

The stock must be stock in a domestic C corporation. S corporations, partnerships, LLCs taxed as partnerships, and foreign corporations cannot issue QSBS. If a corporation that issues stock as a C corporation later converts to S-corporation status, the QSBS status of stock issued during the C-corporation period is not automatically lost by the conversion alone -- but the active business requirement (discussed below) and other ongoing requirements must continue to be met. Verify the impact of entity conversion on QSBS status at IRS.gov.

Original Issue Requirement

The stock must be acquired by the taxpayer at its original issue (within the meaning of IRC 1202(c)(1)(B)), directly from the corporation or through an underwriter. Secondary market purchases from other shareholders do not produce QSBS in the hands of the purchasing taxpayer. Original issue can occur in exchange for money, property (other than stock), or compensation for services provided to the corporation -- verify the applicable rules and any restrictions on service-based issuances at IRS.gov. Stock received in exchange for stock (a conversion) is generally treated as acquired at original issue for the converted stock; verify applicable rules at IRS.gov.

Active Business Requirement at Issuance

At the time of issuance, the corporation must be a qualified small business meeting the gross asset test under IRC 1202(d) and the active business requirement of IRC 1202(e) must be satisfied during substantially all of the taxpayer's holding period. These are described in detail in their respective sections below.

Stock Redemption Limitations

IRC 1202(c)(3) provides that stock is not QSBS if the corporation has made certain disqualifying redemptions within a specified period before or after the issuance. Specifically, the exclusion is limited if the corporation has purchased any of its stock from the taxpayer or a related person within approximately 2 years before or after the issuance, or has made a "significant redemption" within a 1-year period around the issuance. These redemption lookback rules are designed to prevent corporations from engineering QSBS status through pre-issuance buybacks. Verify the precise redemption limitations and applicable thresholds at IRS.gov.

IRC 1202(d): The Gross Asset Test

The gross asset test is a gate that must be satisfied at the time of QSBS issuance. It is evaluated at two points: immediately before the issuance and immediately after the issuance. The corporation must satisfy the threshold at both points. Verify the current applicable threshold at IRS.gov -- under pre-OBBBA law the ceiling was approximately $50 million, and the OBBBA reportedly raised this figure to approximately $75 million (verify at IRS.gov and consult independent counsel, as these provisions are recently enacted and implementation guidance may be pending).

How Gross Assets Are Computed

For purposes of the IRC 1202(d) test, aggregate gross assets are computed as the sum of cash held by the corporation plus the aggregate adjusted bases of all other property held by the corporation. The adjusted basis of property is used rather than fair market value, which means that a corporation with highly appreciated property may pass the gross asset test even if its economic value far exceeds the threshold. Verify the computation methodology and any applicable modifications under IRC 1202(d)(2) at IRS.gov.

Cash and property contributed to the corporation in exchange for the stock being issued -- the very offering in which the QSBS is being acquired -- is included in gross assets for the immediately-after test. This means that a corporation that is right at the threshold before an offering may exceed it immediately after receiving the offering proceeds, disqualifying the newly issued stock. Practitioners advising pre-issuance must model the post-closing gross asset figure using expected offering proceeds, not just the pre-closing balance sheet.

Predecessor and Affiliated Corporation Aggregation

The gross assets of predecessor corporations and corporations that are members of the same parent-subsidiary controlled group (within the meaning of IRC 1202(d)(3)) are aggregated with the issuing corporation for purposes of the threshold test. Verify the applicable aggregation and attribution rules at IRS.gov. A startup that is spun off from a large parent corporation, or that has a significant corporate predecessor, may fail the gross asset test even if the issuing entity itself appears small.

IRC 1202(e): The Active Business Requirement

Unlike the gross asset test, the active business requirement under IRC 1202(e) is an ongoing obligation that must be satisfied throughout substantially all of the taxpayer's holding period. If the corporation fails this test at any point during the holding period, the taxpayer's stock may no longer qualify as QSBS for the gain exclusion. This is the most operationally demanding qualification requirement under IRC 1202 -- it requires that the corporation's asset deployment remain within the boundaries of a qualified trade or business for the entire duration of the investment.

The 80 Percent Asset Use Test

During substantially all of the taxpayer's holding period, at least 80 percent (by value) of the corporation's assets must be used in the active conduct of one or more qualified trades or businesses. Verify the current definition of "substantially all" and the valuation methodology for the 80 percent test under IRC 1202(e) and applicable Treasury guidance at IRS.gov. Cash held for working capital purposes is generally treated as used in the active conduct of a qualified trade or business for a reasonable period after the stock is issued, but excess cash and passive investments may count against the 80 percent threshold.

Qualified Trades or Businesses: What Qualifies

A qualified trade or business under IRC 1202(e)(3) is any trade or business other than those specifically excluded by the statute. The approach is exclusionary: if the business is not listed among the excluded categories, it presumptively qualifies. Technology, manufacturing, wholesale and retail trade, software development, e-commerce, and similar businesses generally qualify. Verify current IRS interpretations of trade or business categorization at IRS.gov, as the line between qualifying and excluded businesses can be fact-specific in service-oriented industries.

Excluded Trades or Businesses

The following trades and businesses are expressly excluded from the definition of a qualified trade or business under IRC 1202(e)(3) and therefore cannot support a QSBS exclusion (verify the current statutory text and any applicable Treasury Regulations or IRS guidance at IRS.gov):

• Services in the fields of health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, and brokerage services
• Any trade or business where the principal asset is the reputation or skill of one or more of its employees or owners (a catch-all that extends the service exclusion to businesses not specifically named)
• Any banking, insurance, financing, leasing, investing, or similar business
• Any farming business (verify current scope at IRS.gov)
• Any business involving the production or extraction of products for which a deduction is allowable under IRC 613 or IRC 613A (mining and natural resources)
• Hotel, motel, and restaurant businesses
• Any business of operating a hotel, motel, restaurant, or similar establishment

Real estate businesses are generally excluded because they are treated as a financing, leasing, or investing business or because the assets are passive in nature. Verify the current treatment of real estate and real estate-adjacent businesses at IRS.gov.

The Reputation-or-Skill Catch-All

The "reputation or skill" exclusion is broad and can capture businesses that do not fit neatly into the enumerated service categories. A business in which the primary value driver is the personal brand, professional reputation, or unique skill of one or more founders or key employees -- even if the business is not in one of the named service fields -- may be disqualified. This catch-all has been the subject of ongoing IRS guidance and case interpretation. Verify current IRS interpretations at IRS.gov before concluding that a founder-led business outside the named service categories satisfies the active business requirement.

IRC 1202(b): Per-Issuer Gain Limitation

The gain exclusion under IRC 1202 is not unlimited even for qualifying stock. IRC 1202(b) imposes a per-taxpayer, per-issuer gain cap. Only gain up to the applicable cap is excludable; gain in excess of the cap is recognized and taxable at the applicable rate. The cap operates independently for each issuer, meaning that a taxpayer who holds QSBS in multiple corporations has a separate cap for each corporation's stock -- large gains from one issuer do not reduce the cap available for another issuer's stock.

The Two-Part Cap Formula

The per-issuer gain exclusion cap is the greater of (verify current figures at IRS.gov; the OBBBA reportedly changed the dollar floor):

• A dollar floor amount -- approximately $10 million under pre-OBBBA law; the OBBBA reportedly raised this floor (research suggests approximately $15 million); verify the current dollar figure at IRS.gov and consult independent counsel, as these provisions are recently enacted and implementation guidance may be pending.
• Ten times the taxpayer's adjusted basis in the QSBS of the issuer sold during the taxable year. This alternative can far exceed the dollar floor for taxpayers who acquired QSBS with a significant cash investment.

Per-Taxpayer Application

The cap is applied on a per-taxpayer basis. Married taxpayers filing jointly share a single per-issuer cap; married taxpayers filing separately each have their own cap for the same issuer -- verify current joint return treatment at IRS.gov. The cap applies annually: if the taxpayer sells QSBS in a corporation across multiple taxable years, the remaining cap from prior years is tracked and reduced. For trusts, estates, and pass-through entities, the cap application may differ; verify applicable rules at IRS.gov.

Gain in Excess of the Cap

Gain from the sale of QSBS that exceeds the applicable per-issuer cap is recognized and taxable. For pre-OBBBA stock that qualifies for only a partial exclusion, the non-excluded gain is also recognized. The applicable tax rate for recognized gain from QSBS sales may differ from the standard preferential long-term capital gains rate -- verify the current rate treatment at IRS.gov, including the potential application of the 28 percent rate discussed in the next section.

Pre-OBBBA 28 Percent Rate Trap for Partial Exclusions

For QSBS that qualifies for only a partial exclusion under the pre-OBBBA tiers (50 percent or 75 percent), the non-excluded portion of the gain is recognized. Under the pre-OBBBA rate rules, that non-excluded gain was potentially subject to a maximum federal income tax rate of approximately 28 percent -- the rate applicable to collectibles and certain other capital gains -- rather than the preferential long-term capital gains rate of approximately 20 percent (or lower applicable rate) that would apply to most other long-term capital gains. Verify the current applicable rate for non-excluded QSBS gain, including the 28 percent rate's current scope and whether it applies to all or only some partial-exclusion tiers, at IRS.gov before advising on the after-tax economics of a QSBS sale.

This rate differential matters because the after-tax economics of a 75 percent exclusion are not simply 25 percent of gain at preferential rates -- they may be 25 percent of gain at a higher rate. For investors holding pre-February 2009 QSBS (50 percent exclusion tier), the combination of a larger non-excluded gain percentage and the potentially elevated 28 percent rate can significantly reduce the net tax benefit of the exclusion compared to the 100 percent tier.

Whether the 28 percent rate applies to partially-excluded QSBS gain under the OBBBA's new structure is subject to the implementation guidance that may be pending; verify the applicable rate for OBBBA-regime stock at IRS.gov and consult independent counsel, as these provisions are recently enacted and implementation guidance may be pending.

AMT Interaction and the TCJA Change

Under pre-TCJA law, a portion of the gain excluded under IRC 1202 was treated as an alternative minimum tax (AMT) preference item under IRC 57(a)(7). Specifically, approximately 7 percent of the excluded gain was added back as an AMT preference, reducing (but not eliminating) the after-tax benefit of the exclusion for taxpayers subject to the AMT. Verify the historical scope of the IRC 57(a)(7) preference and the applicable percentage at IRS.gov.

The Tax Cuts and Jobs Act of 2017 (TCJA) repealed the AMT preference for excluded QSBS gain attributable to the 100 percent exclusion tier (stock acquired after September 27, 2010, under pre-OBBBA rules). For the 50 percent and 75 percent tiers, the AMT preference remained relevant because those tiers did not achieve full exclusion. Verify the current scope of the AMT preference under IRC 57(a)(7) and the TCJA repeal at IRS.gov.

For OBBBA-regime stock, the AMT treatment of partially-excluded QSBS gain (at the 3-year and 4-year tiers, if applicable) requires verification at IRS.gov and with independent counsel, as the OBBBA provisions are recently enacted and implementation guidance may be pending. Practitioners should not assume that the TCJA's elimination of the preference for 100 percent exclusion stock automatically extends to the OBBBA's partial-exclusion tiers without confirming current guidance.

IRC 1045 Rollover: Preserving the Exclusion Before Five Years

An investor who has held QSBS for more than six months but fewer than five years faces a dilemma: selling the stock recognizes gain that is not eligible for the IRC 1202 exclusion because the five-year holding period has not been reached, but circumstances (a liquidity event, a business failure, or a desire to reallocate) may require a sale before that threshold. IRC 1045 addresses this situation by allowing a taxpayer to roll over qualifying gain into replacement QSBS, preserving the exclusion opportunity without recognizing gain at the time of the initial sale.

IRC 1045 Requirements

To elect the IRC 1045 rollover, the following requirements must be met (verify all current requirements at IRS.gov and with qualified counsel before relying on this provision):

• The taxpayer must have held the original QSBS for more than 6 months at the time of sale (not the 5-year IRC 1202 threshold)
• The original stock must qualify as QSBS -- all IRC 1202(c) requirements must be met
• The taxpayer must purchase replacement QSBS within 60 days of the sale of the original QSBS
• The replacement stock must also qualify as QSBS of a different corporation (verify whether same-corporation replacement is available in limited circumstances at IRS.gov)
• The taxpayer must elect the rollover treatment; it is not automatic

Basis and Holding Period Treatment

Under the IRC 1045 rollover, the taxpayer's gain from the sale of the original QSBS is not recognized to the extent reinvested in replacement QSBS. The unrecognized gain reduces the taxpayer's adjusted basis in the replacement QSBS. The holding period of the original QSBS tacks to the holding period of the replacement QSBS, meaning that the time the taxpayer held the original stock counts toward the 5-year holding period for IRC 1202. This tacking is critical: a taxpayer who held original QSBS for 4 years and rolls over into replacement QSBS needs to hold the replacement for only 1 additional year to reach the IRC 1202 5-year threshold. Verify the current tacking rules and any limitations on the tacking of holding period at IRS.gov.

The IRC 1045 rollover is a powerful tool for venture investors who may need to exit positions in a portfolio company before the five-year mark, but it requires careful execution within the 60-day window and proper documentation that the replacement stock qualifies as QSBS. Verify all applicable requirements and election procedures at IRS.gov and with qualified counsel before attempting an IRC 1045 rollover.

Recapture Risks and IRC 1202(j) Transfer Rules

Acquiring stock that qualifies as QSBS at issuance is not a guarantee that it will remain QSBS at the time of sale. Several post-issuance events can disqualify QSBS or complicate the transfer of QSBS status to a successor holder.

Active Business Failure During the Holding Period

As discussed in the active business section above, if the corporation fails the IRC 1202(e) active business requirement during substantially all of the taxpayer's holding period, the stock may lose QSBS status. The consequence is not a "recapture" in the traditional sense (as with depreciation recapture) but rather a disqualification: the gain exclusion is simply unavailable for a sale that occurs after the failure period. The timing and scope of QSBS disqualification from a mid-holding-period active business failure should be verified at IRS.gov with qualified counsel, as the statutory phrase "substantially all" leaves room for interpretation.

Disqualifying Corporate Events

Certain corporate-level events after the issuance of QSBS can affect its qualifed status. Reorganizations, recapitalizations, and mergers may result in the original QSBS being exchanged for stock in a successor or acquiring corporation, and whether the successor stock qualifies as QSBS (and carries the IRC 1202 exclusion) depends on whether the exchange meets the IRC 1202(h) continuity and exchange rules. Verify the applicable rules for QSBS status through corporate reorganizations at IRS.gov.

IRC 1202(j): QSBS Status in IRC 351 Tax-Free Exchanges

IRC 1202(j) addresses the situation in which a taxpayer exchanges QSBS for stock of another corporation in a tax-free exchange under IRC 351. Under the general rule, QSBS status carries over to the stock received in a qualifying IRC 351 exchange, provided the exchange is otherwise a nonrecognition transaction. The receiving corporation's stock takes on the QSBS character and holding period of the original QSBS. However, the receiving corporation must itself continue to meet the active business requirement and the other QSBS qualifications going forward. Verify the precise conditions under which QSBS status survives an IRC 351 exchange, including any limitations related to the receiving corporation's gross assets and active business classification, at IRS.gov.

Gift, Inheritance, and Other Transfers

QSBS transferred by gift generally retains its character in the hands of the donee, with the donee's holding period including the donor's holding period. QSBS received by inheritance through an estate generally retains QSBS character with a fresh basis equal to the fair market value at the decedent's date of death, but the holding period treatment in the context of the IRC 1202 five-year threshold should be verified at IRS.gov for each transfer type. Any transfer that results in a step-up in basis may change the economics of the 10x adjusted basis alternative in the per-issuer cap calculation. Verify current transfer rules for QSBS at IRS.gov.

State Conformity Caveat

IRC 1202 is a federal income tax provision. State income tax treatment of QSBS gain exclusions varies significantly, and many states do not conform to the federal exclusion. Investors who rely on the IRC 1202 exclusion to eliminate federal gain may nonetheless owe full state income tax on the excluded gain in every state in which they file a resident or nonresident return.

Several states with significant venture capital and startup activity have historically not conformed to the IRC 1202 exclusion. California, for example, has historically not conformed, meaning that a California-resident investor who excludes all federal gain under IRC 1202 still owes California income tax on the same gain at California's top marginal individual income tax rate (verify the current California rate and conformity status with qualified California state tax counsel). This state tax liability can significantly reduce the apparent after-tax benefit of the federal exclusion for investors in high-tax nonconforming states.

State conformity to the OBBBA changes -- including the new holding-period tiers, the raised cap, and the raised gross asset threshold -- is particularly uncertain and must not be assumed. Many states follow federal law on a rolling basis; others require affirmative state legislative action to conform to each federal change. As of the date of this publication, the state conformity status of OBBBA amendments is unknown and subject to each state's legislative and administrative process. Verify state tax treatment with qualified state tax counsel in every relevant state before advising clients on the after-tax returns from QSBS investments.

Comparison Table: QSBS Exclusion Tiers and Key Requirements

The following table summarizes the key features of each exclusion regime under IRC 1202, comparing the pre-OBBBA acquisition-date tiers with the OBBBA holding-period tiers. All figures must be verified at IRS.gov; OBBBA figures are based on available research and must be verified at IRS.gov and with independent counsel, as these provisions are recently enacted and implementation guidance may be pending.

All figures are subject to change. Verify all thresholds, percentages, and holding-period requirements at IRS.gov. OBBBA figures are based on available research and must be verified at IRS.gov and with independent counsel, as these provisions are recently enacted and implementation guidance may be pending.

Practical Illustration: IRC 1202 Gain Exclusion Computation (Illustrative Only)