What Founders Should Know About QSBS After the OBBBA

If you built a C-corporation from the ground up and are thinking about a liquidity event, the federal tax code may reward you with an exclusion of up to $15 million in capital gains — entirely tax-free at the federal level. That benefit, known as Qualified Small Business Stock (QSBS) under Section 1202 of the Internal Revenue Code, has been a powerful but often misunderstood planning tool for years. The One Big Beautiful Bill Act (OBBBA), signed into law on July 4, 2025, made it significantly more accessible. Whether you are years away from an exit or already in conversation with a buyer, understanding how these rules changed is worth your time.

What QSBS Is — and Why It Matters for First-Gen Founders

QSBS is a federal tax incentive that allows founders, early employees, and investors in qualifying C-corporations to exclude a substantial portion of their capital gain when they sell their shares. For founders who have built meaningful equity without an inherited financial playbook, this provision can be one of the most consequential items in the entire tax code.

Before the OBBBA, the rules were fairly rigid: you had to hold qualifying stock for at least five years before claiming any exclusion, and the maximum gain excluded was capped at $10 million per taxpayer per issuer (or 10 times your adjusted basis in the shares, whichever was greater). Miss the five-year mark by a single day and you got nothing. That all-or-nothing structure caused many founders to lose the benefit entirely when an acquisition came sooner than planned.

The OBBBA changed the math in three meaningful ways for stock issued after July 4, 2025.

Three Changes That Affect How You Plan an Exit

1. A tiered holding period replaces the flat five-year rule

Under the updated rules, the exclusion now phases in across a tiered holding schedule. A founder who holds qualifying shares for three years can now exclude 50% of the gain; four years earns a 75% exclusion; and five or more years still delivers the full 100% exclusion. For founders with stock issued after July 4, 2025, the all-or-nothing penalty for an earlier sale is gone. A three-year or four-year exit now carries a meaningful tax benefit rather than none at all.

This matters in practice because acquisition timelines rarely follow a five-year calendar. Many founder exits happen at three or four years when strategic buyers move quickly or market conditions shift. The tiered exclusion schedule for stock acquired after July 4, 2025 acknowledges that reality.

2. The exclusion cap rose from $10 million to $15 million

The OBBBA raised the dollar-based cap on excludable gain to $15 million per taxpayer per issuer for stock issued after July 4, 2025 — up from the previous $10 million limit — and this figure is now indexed for inflation going forward. The 10-times-adjusted-basis alternative also remains available, meaning a founder with significant capital invested could potentially exclude well beyond $15 million if that calculation yields the larger number.

One planning detail worth knowing: the exclusion is calculated per taxpayer per issuing company. Each co-founder has a separate cap, and each qualifying company in your portfolio is its own calculation. A married couple where each spouse holds shares separately — rather than jointly — may each claim a $15 million exclusion on the same exit, potentially doubling the benefit. This kind of structure requires early and deliberate planning; it cannot easily be put in place after a deal is announced.

3. The gross assets ceiling rose to $75 million

To issue stock that qualifies for the Section 1202 exclusion, a corporation's aggregate gross assets must fall under a statutory ceiling at the time the shares are issued. The OBBBA raised that threshold from $50 million to $75 million for stock issued after July 4, 2025. For later-stage startups or companies that have grown quickly before issuing additional equity, this change opens QSBS eligibility to a broader range of cap tables that previously fell outside the limit.

Stock issued on or before July 4, 2025 continues to follow the older rules: a flat five-year holding requirement, a $10 million cap, and the $50 million gross assets ceiling. Both regimes are now in effect simultaneously, and which set of rules applies to your shares depends on when they were issued — not when you sell them.

What QSBS Requires — And Where Plans Can Unravel

The Section 1202 exclusion carries strict eligibility requirements, and meeting the holding period is just one of them. The corporation must be a domestic C-corporation throughout the holding period; S-corporations, LLCs, and partnerships do not qualify. The business must operate in a qualified trade or business — certain service industries, including financial services, law, and consulting, are explicitly excluded. And the stock must be acquired at original issuance, directly from the company, not purchased from another stockholder on the secondary market.

Beyond eligibility, there are planning risks that can quietly erode the benefit. Sell before the five-year threshold on post-July 2025 stock and the 100% exclusion is unavailable — you receive the partial tier that corresponds to your actual holding period, not the full amount. Corporate restructuring events, including certain redemptions and recapitalizations, can disqualify shares or reset holding periods. And while the federal exclusion can be substantial, state conformity varies: Florida currently conforms to the federal exclusion, but that is not the case in every state, and founders with multi-state business operations should verify their exposure carefully.

The Section 1202 exclusion rewards founders who plan early. The eligibility clock starts at issuance, the cap table structure matters from day one, and coordinating this with your broader wealth strategy — estate planning, business structure, and post-sale liquidity — is where the real value is captured.

Coordinating QSBS with Your Broader Wealth Strategy

QSBS planning does not exist in isolation. A business exit is typically the largest liquidity event in a founder's financial life, and the choices made around deal structure, entity type, share allocation, and timing interact directly with estate planning, retirement income design, and investment strategy for the proceeds.

A few coordination points worth examining well before a transaction:

• Entity structure: The exclusion applies only to C-corporation stock. Founders operating as an S-corporation or LLC who are considering a QSBS strategy may need to evaluate whether converting the entity makes sense — recognizing that conversion itself carries tax and structural considerations.

• Post-sale liquidity: A large capital gain — even one substantially excluded under Section 1202 — can still create a meaningful taxable event when partial gains remain, when deferred compensation is involved, or when state taxes are not conforming. Planning the "after" is as important as qualifying the "before."

• Estate and legacy planning: Founders with growing business equity may have both a QSBS opportunity and an estate planning window to work with simultaneously — and the two often interact in ways that make coordinated strategy more valuable than either approach alone.

These disciplines — tax planning, business exit planning, estate strategy, and post-sale investment — work best when they are designed together rather than addressed in sequence as events unfold.

If you are a founder thinking about an exit in the next two to five years, or if you issued new equity recently and are wondering whether it qualifies for the updated Section 1202 rules, our team is happy to talk through how these changes fit into your broader picture. This is the kind of planning that pays to start early.

Common questions

Does QSBS apply to S-corporation or LLC founders?

No. Section 1202 applies only to stock issued by a domestic C-corporation. S-corporations, LLCs taxed as partnerships, and other pass-through entities do not issue qualifying QSBS. Founders in those structures cannot claim the exclusion on their equity unless the entity converts to a C-corporation and new qualifying shares are issued — a step that carries its own tax and legal considerations worth evaluating carefully.

All the more reason we plan in advance with our business founder clients looking to start the exit conversation early in case we deem it appropriate to transition to a C-Corp and allowing the sufficient time needed to qualify for QSBS.

What if an existing LLC or S corporation converts?

Years spent operating as an LLC generally do not count toward the QSBS holding period. When qualifying stock is issued in exchange for the business’s assets, the clock generally starts at that exchange. Pre-conversion appreciation generally is not eligible for exclusion. Simply changing an S corporation’s tax status does not make its existing shares QSBS.

For example, a qualifying LLC incorporated in October 2026 could potentially reach the 50% exclusion in October 2029 and 100% in October 2031, assuming all requirements remain satisfied.

For a founder considering conversion, the first questions are:

• What does the business do

• How is it taxed today?

• When is the anticipated sale?

What happens if I sell my qualifying stock before the five-year mark under the new OBBBA rules?

For stock issued after July 4, 2025, the new tiered holding structure means you can still receive a partial exclusion on an earlier sale. Holding for at least three years qualifies 50% of the gain for exclusion; four years qualifies 75%. The full 100% exclusion still requires a five-year hold. For stock issued on or before July 4, 2025, the older flat rules apply — a five-year minimum is still required for any exclusion.

Is the QSBS exclusion available in Florida?

Florida does not impose a state personal income tax, which means the federal QSBS exclusion effectively extends to state-level gains for individual founders in Florida as well — there is no Florida income tax from which you would otherwise need the exclusion. This is one reason the exclusion can be particularly valuable for founders based in Florida, though each situation depends on the specifics of the business structure, residency, and where income is sourced.

Disclosures: This is for educational and informational purposes only. Consult with a tax professional for guidance.

Sources

• IRS Schedule D instructions covering the Section 1202 exclusion for qualified small business stock

• IRS private letter ruling citing Section 1202 C-corporation, original issuance, and active business requirements

• IRS Topic 409 referencing the tax treatment of Section 1202 qualified small business stock gains

• IRS 2025-2026 Priority Guidance Plan listing forthcoming guidance under §1202 on qualified small business stock