QSBS Planning for Founders
What Is the Tiered System for QSBS?
The tiered system for Qualified Small Business Stock (QSBS) determines what percentage of your capital gain qualifies for federal exclusion under Section 1202, and that percentage depends almost entirely on when your stock was issued. Different investors at different funding stages may hold stock in different tiers, meaning the same company exit can produce very different tax outcomes across your cap table.
The Core Answer
How the QSBS Exclusion Tier System Works
Under Section 1202 of the Internal Revenue Code, qualified small business stock may allow holders to exclude a significant portion of capital gains from federal income tax at exit. The exclusion percentage you receive is not uniform; it is determined by a tiered schedule based on the date the stock was originally issued.
This date-based structure creates distinct tiers across your cap table. Founders who received stock at formation, early investors who participated in a Seed or Series A round, and later-stage investors entering at a Series B or C can each hold stock subject to different exclusion rates, even if the company qualifies as a Qualified Small Business (QSB) at each issuance date.
Understanding which tier applies to each block of stock is the necessary first step before evaluating any QSBS stacking strategy or pre-sale transfer planning. The tax treatment at exit flows directly from this determination, and getting it wrong, or planning around the wrong tier, can materially reduce after-tax proceeds.
The Three QSBS Exclusion Tiers (As of 2026)
Per Section 1202 and the One Big Beautiful Bill Act (OBBBA) framework
Tier 1
50% Exclusion
Stock issued before February 18, 2009. Gain excluded from federal income tax; excluded gain may be subject to AMT preference and the 28% rate applies to gain not excluded.
Tier 2
75% Exclusion
Stock issued between February 18, 2009 and September 27, 2010. Reduced AMT exposure relative to Tier 1; the 28% rate applies to the non-excluded portion of gain.
Tier 3
100% Exclusion
Stock issued on or after September 28, 2010. No federal income tax on excluded gain; no AMT preference treatment for most holders. This is the tier almost all active startup investors and founders are working within today.
Results vary by individual tax situation. Not all QSBS qualifies; consult qualified tax counsel. Pennsylvania does not conform to the federal QSBS exclusion.
How Tiers Apply Across a Cap Table
Multiple Funding Rounds, Multiple Tiers
A single company can have investors in all three tiers simultaneously. Here is how that typically plays out across a startup's funding history.
| Investor / Round | Issuance Date (Example) | Applicable Tier | Federal Exclusion Rate |
|---|---|---|---|
| Founder (at formation) | 2015 | Tier 3 | 100% |
| Angel / Seed Investor | 2017 | Tier 3 | 100% |
| Series A Investor | 2020 | Tier 3 | 100% |
| Series B Investor (pre-2009 vintage fund) | 2008 fund vintage | Tier 1 | 50% |
| Series C Investor | 2024 | Tier 3 | 100% |
Illustrative example only. Actual tiers depend on verified stock issuance dates and IRS qualification criteria. Individual results will vary.
What Founders Need to Know
The Key Rules That Govern QSBS Tier Eligibility
A stock's QSBS tier is determined at issuance and cannot be upgraded by holding the shares longer. Several threshold requirements must also be met for the stock to qualify at all. Failing any of these disqualifies the exclusion regardless of which tier would otherwise apply.
Five-Year Holding Requirement
Regardless of tier, QSBS must be held for more than five years to qualify for any exclusion under Section 1202. Shares sold before the five-year mark may not use the exclusion, though Section 1045 rollover rules may allow deferral in certain circumstances. This holding period is calculated from the stock's original issuance date, not the date a stacking transfer occurs to a trust or other entity.
Gross Asset Test at Issuance
At the time of stock issuance, the issuing corporation's aggregate gross assets must not exceed $50 million (as measured under Section 1202(d)). This test applies at each issuance date, meaning early-round QSBS at a small company may qualify even if later rounds, issued after the company crosses the $50 million threshold, do not. Each round must independently satisfy the gross asset test at the time it is issued.
Active Business Requirement and Eligible Industries
The issuing corporation must be a domestic C-corporation actively engaged in a qualified trade or business at the time of issuance and through substantially all of the holding period. Certain professional service businesses (legal, health, finance, brokerage, consulting, and others) are excluded from QSBS eligibility under Section 1202(e)(3). This requirement applies at both issuance and through the holding period, which means a company that converts its business model mid-hold may inadvertently jeopardize QSBS eligibility for some shareholders.
Original Issuance Requirement
QSBS must be acquired at original issuance directly from the corporation, not on the secondary market. Stock purchased from another shareholder does not qualify, even if the original holder's stock was QSBS. This rule has significant implications for cap table transfers, fund secondary transactions, and certain conversion events, and should be reviewed carefully before any ownership restructuring. See our related resource on how QSBS is taxed for more on the interaction between tier rates and the 28% rate.
The Stacking Connection
How the Tier System Interacts With QSBS Stacking
QSBS stacking is the strategy of transferring QSBS-eligible shares to multiple taxpayers, typically trusts or family members, so that each transferee may claim their own separate Section 1202 exclusion cap. The per-taxpayer exclusion limit under Section 1202 is the greater of $10 million or 10 times the taxpayer's adjusted basis in the stock sold.
The critical point where stacking and the tier system intersect: the exclusion percentage that applies to each transferee is determined by the original issuance tier of the stock transferred, not the date of transfer. A block of Tier 3 stock (100% exclusion) that is transferred to a non-grantor trust before a sale retains its Tier 3 status in the trust's hands, subject to holding period and other qualification rules continuing to be met.
This means stacking strategies are most powerful when built around Tier 3 stock, because each additional taxpayer potentially excludes up to $10 million (or more, depending on basis) of gain at a 100% federal exclusion rate. Stacking Tier 1 stock still multiplies the exclusion cap across taxpayers, but each taxpayer only excludes 50 cents of every dollar of gain, a materially different outcome. Founders planning a liquidity event need to understand both the tier of their stock and the stacking architecture they have in place before the transaction closes.
Read the Full QSBS Stacking GuideTier + Stacking: Illustrative Tax Math
Scenario: $30M gain on Tier 3 QSBS, single taxpayer vs. stacked across three taxpayers
Without Stacking
One taxpayer claims the Section 1202 exclusion on up to $10M of gain at 100%. The remaining $20M of gain is taxable at federal long-term capital gains rates (currently 20% for most high-income taxpayers, plus 3.8% NIIT where applicable).
With Stacking (Three Taxpayers)
If the stock was properly transferred to two additional eligible taxpayers before the sale, each may claim up to $10M of exclusion. All $30M of gain could potentially fall within the combined exclusion caps at a 100% exclusion rate. Federal taxable gain may be reduced to zero on the excluded portion, depending on individual circumstances.
Illustrative only. Actual results depend on taxpayer basis, holding periods, and whether each transfer and entity meets Section 1202 requirements. Significant risks and trade-offs exist. Tax and legal counsel required.
Visual Reference
How Tiers Flow Through a Funding Timeline
Think of each funding round as a separate layer on the cap table, each with its own exclusion tier permanently attached at issuance.
2009
Tier 1 Block — 50% Exclusion Rate
Stock issued in this window carries a 50% exclusion. Any investor or founder whose stock was issued before February 18, 2009 holds Tier 1 shares. This tier is increasingly rare in active cap tables today but can appear in institutional fund vehicles with older vintage years. AMT preference items apply to excluded gain.
–2010
Tier 2 Block — 75% Exclusion Rate
Stock issued between February 18, 2009 and September 27, 2010 qualifies for a 75% exclusion. This was a transitional window during the economic stimulus period. Tier 2 stock is relatively uncommon in today's active deal flow but may appear in older investor positions within funds or early-stage syndicates from that period.
–NOW
Tier 3 Block — 100% Exclusion Rate
Stock issued on or after September 28, 2010 qualifies for a 100% federal exclusion, subject to all Section 1202 requirements. This is the tier applicable to the vast majority of active founders, startup investors, and fund managers working in today's venture and growth capital markets. No AMT preference items apply to the excluded gain for most holders. All stacking strategies built around this tier operate at the highest possible exclusion efficiency.
What Can Go Wrong
Common Mistakes Founders Make With QSBS Tiers
Assuming All Shares Are the Same Tier
Founders who received shares at multiple points, such as initial formation, a follow-on issuance for a new product line, or a secondary authorization, may hold shares from different issuance dates. Each block must be analyzed separately. Treating the entire holding as one tier can result in either overstating or understating the available exclusion.
Missing the $50M Gross Asset Threshold
As companies grow, later funding rounds may be issued after the company's aggregate gross assets exceed $50 million. Stock issued after this threshold is crossed does not qualify for QSBS treatment, regardless of which tier would otherwise apply. According to IRS guidance under Section 1202(d), the calculation includes contributed capital at the time of issuance, not just current assets, which can trip up founders at rapidly growing companies.
Conflating Tier With Exclusion Cap
The tier determines the exclusion percentage; the per-taxpayer cap limits the total gain eligible for exclusion. A founder with $30M in Tier 3 QSBS gain does not automatically exclude the full $30M. They exclude only up to their individual cap (the greater of $10M or 10x basis). Stacking is what extends the aggregate exclusion available across the total gain. Confusing these two distinct concepts leads to planning that either underutilizes QSBS or creates unrealistic expectations about tax savings.
Waiting Too Long to Structure Stacking Transfers
Stacking requires transferring shares to additional eligible taxpayers before the sale, and ideally well before a transaction is imminent. Transfers made after a letter of intent is signed or after a sale process is announced may be challenged under step-transaction doctrine. The holding period in the transferee's hands must also be considered. Founders who wait until they are deep in a deal process have severely limited options.
Overlooking State Tax Non-Conformity
The QSBS exclusion is a federal benefit. Many states, including Pennsylvania, do not conform to the Section 1202 exclusion, meaning gain excluded at the federal level may still be fully taxable at the state level. Pennsylvania imposes a flat 3.07% income tax on capital gains with no QSBS carve-out. Founders in Pennsylvania need a state-level strategy that runs parallel to their federal QSBS planning. See our guide on what disqualifies QSBS for additional detail on qualification pitfalls.
Ignoring the 80% Active Business Test
QSBS qualification requires the corporation to use at least 80% of its assets (by value) in one or more qualified trades or businesses throughout substantially all of the holding period. This ongoing test, not just a check at issuance, means a company that diversifies into passive investments or acquires a non-qualifying subsidiary mid-hold may put existing QSBS eligibility at risk. Founders should understand how the 80% active business test applies to their specific company structure throughout the entire hold. Our QSBS stacking guide covers this test in further detail.
Frequently Asked Questions
QSBS Tiered System: Common Questions
What is the tiered system for QSBS?
The tiered system for QSBS refers to the three exclusion rate levels established by Section 1202 of the Internal Revenue Code: 50% for stock issued before February 18, 2009 (Tier 1); 75% for stock issued between February 18, 2009 and September 27, 2010 (Tier 2); and 100% for stock issued on or after September 28, 2010 (Tier 3). The tier is set at issuance and governs what percentage of qualifying gain may be excluded from federal income tax upon a sale of the stock, subject to per-taxpayer exclusion caps and all other Section 1202 requirements being met.
What is the QSBS stacking strategy?
QSBS stacking is a pre-liquidity planning strategy where a founder or investor transfers QSBS-eligible shares to multiple non-grantor trusts or family members before a sale. Because the Section 1202 exclusion cap applies per taxpayer, each transferee may potentially claim their own separate cap (the greater of $10 million or 10 times adjusted basis). When executed correctly and well in advance of a transaction, stacking may allow a founder to multiply the total gain eligible for federal exclusion across several taxpayers. Each transfer must meet specific requirements, and the strategy carries meaningful legal and tax risks that require qualified counsel to evaluate and execute properly.
What are the rules for QSBS aggregation?
QSBS aggregation typically refers to how the per-taxpayer exclusion cap accumulates when a taxpayer holds stock from the same qualified small business across multiple issuance tranches. All QSBS from the same issuer held by a single taxpayer is aggregated for purposes of the $10 million per-issuer exclusion cap under Section 1202(b). This is why founders who received shares at multiple points in company history need to understand the combined value of their qualified holdings against this aggregate limit. It is also why stacking to additional taxpayers is designed to access separate per-taxpayer caps on the same issuer's stock.
What is the 2-year rule for QSBS?
Section 1045 of the Internal Revenue Code contains a provision sometimes called the "two-year rollover rule," which allows taxpayers who sell QSBS before the five-year mark to defer gain recognition by reinvesting the proceeds into new qualifying QSBS within 60 days. This is distinct from the five-year holding requirement for the Section 1202 exclusion itself. The two-year reference that sometimes appears in QSBS discussions also relates to the period during which certain corporations cannot repurchase stock from a shareholder without potentially disqualifying the QSBS status of other shareholders' stock. Both rules require careful attention in pre-liquidity planning.
Is it better to have stacked or unstacked QSBS?
Whether stacking makes sense depends on the size of the expected gain relative to the individual taxpayer's exclusion cap, the founder's estate planning goals, and whether the transfers can be executed sufficiently far in advance of a liquidity event. For founders with expected gains well above $10 million on qualifying QSBS, stacking to additional taxpayers may offer meaningful federal tax planning opportunities, but the strategy involves real trade-offs, including irrevocable transfers of ownership, complexity, and ongoing compliance requirements. A founder with total expected gain at or below their individual exclusion cap may have no practical benefit from stacking. Every situation is different; a qualified advisor should model the specific economics before any transfers occur.
Can investors in different funding rounds hold different QSBS tiers in the same company?
Yes. Because the QSBS tier is determined by the date of each stock issuance, different investors who participated in different rounds may hold stock subject to different exclusion rates. A company founded in 2018 that raised a Seed in 2019, a Series A in 2021, and a Series B in 2024 would, assuming the company qualified as a QSB at each issuance, have all of those investors holding Tier 3 (100% exclusion) stock. However, an institutional investor that holds stock from a 2008-vintage fund would be in Tier 1. The company's qualification status is tested at each individual issuance, and investors must hold their specific shares for more than five years for their tier to apply at sale.
Working With Defiant Capital Group
QSBS Planning Requires Precision Before the Transaction Closes
The tiered QSBS system creates real planning complexity for founders and investors who hold stock across multiple rounds, or who are considering stacking strategies to extend their available exclusion. Once a transaction is in process, the window to restructure ownership, establish new taxpayers, or address qualification gaps closes rapidly.
At Defiant Capital Group, Jonathan Dane, CFA, CFP works with founders ahead of liquidity events to evaluate QSBS qualification by tranche, model the interaction between tier rates and stacking architecture, and coordinate with legal counsel to execute transfers that are designed to meet Section 1202 requirements. As a fiduciary, independent RIA, we provide planning that is structured around your interests, not products or transaction fees.
For founders in Pennsylvania, we also address the state tax layer separately, since Pennsylvania does not conform to the federal QSBS exclusion, meaning federal planning and state planning must work together rather than one substituting for the other.
QSBS Tier and Qualification Review
We review each tranche of stock issuance to verify the applicable exclusion tier and identify any qualification gaps before they become irreversible at closing.
Stacking Architecture and Modeling
We model stacking strategies across multiple taxpayers, running the economics of tiered exclusion rates against expected gain to determine whether stacking is likely to produce a meaningful benefit in your specific situation.
Pennsylvania-Layer Planning
Because Pennsylvania does not conform to the federal QSBS exclusion, we coordinate state and federal planning together, not as separate conversations, so founders understand the full after-tax outcome of any liquidity event.
Coordination With Legal Counsel
QSBS planning requires close coordination between the wealth advisor and legal counsel. We work alongside your attorneys to align the financial planning with proper legal structuring, so the tax and legal frameworks support each other from the start.
Start the Conversation
Know Your QSBS Tier Before the Deal Starts
The QSBS tiered exclusion system rewards founders and investors who plan early, and punishes those who wait. Understanding which tier your stock falls in, how stacking can extend your available exclusion, and where Pennsylvania's state tax layer creates additional complexity is not a conversation to have during due diligence. It is a conversation to have years before a transaction begins.
If you are a founder or early-stage investor thinking ahead to a potential liquidity event, Defiant Capital Group offers a direct conversation with Jonathan Dane, CFA, CFP. No generic intake forms, no junior advisors. Reach us directly at (412) 697-1435 or defiant@defiantcap.com.