How Has OBBBA Changed QSBS Planning for Founders?
By AlTi Global
Why the new rules make early, integrated planning even more valuable
OBBBA expanded the federal Qualified Small Business Stock (QSBS) exclusion for qualifying stock acquired1 after July 4, 2025. The new rules can increase flexibility and potential tax benefits, but founders still need to confirm eligibility and coordinate tax, trust, estate, state-residency, philanthropic, investment, and family decisions well before a sale becomes foreseeable.
As their businesses scale and attract interest from potential buyers, founders often focus on valuation, financing and the terms of the sale. They assume that they will qualify for the Qualified Small Business Stock (QSBS) capital gains tax exclusion and so ignore tax planning – and wider financial planning – until it is too late. By the time a letter of intent arrives, valuable options may already have narrowed or disappeared. The most consequential planning decisions are, in fact, made much earlier.
The One Big Beautiful Bill Act (OBBBA) has made the federal QSBS exclusion under Section 1202 more generous and flexible. For qualifying stock acquired after July 4, 2025, the exclusion is larger, the holding period more adaptable and more companies can potentially qualify. Yet the central lesson for financial planning remains: the best outcomes depend on starting well before a transaction is likely.
Another central lesson from our work with founders and business owners is that QSBS is rarely a stand-alone tax exercise. It intersects with trusts, estate planning, state residency, philanthropy, investment strategy and decisions about future generations. Those questions need to be considered together and revisited as the company and family evolve.
What Did OBBBA Change for QSBS?
For qualifying stock acquired after July 4, 2025, OBBBA introduced a tiered exclusion after three, four, and five years, increased the per-issuer gain cap, and raised the corporate gross-asset threshold. The foundational QSBS requirements under Section 1202 still apply, so each stock issuance and the company’s eligibility should be reviewed carefully.
First, the former five-year cliff has become a tiered exclusion: 50% after three years, 75% after four and 100% after five. This helps when commercial circumstances force an earlier sale, but it should not be treated as a reason to accelerate one. The non-excluded portion may be subject to a federal tax rate of up to 28% and may also face the 3.8% net investment income tax. For illustration, assume a taxpayer realizes $10 million of gain, the entire amount is within the applicable Section 1202 limitation, and the taxable portion is subject to both the 28% rate and the 3.8% net investment income tax. A sale after four years would leave 25%, or $2.5 million, unexcluded, producing approximately $795,000 of federal tax. Actual results depend on the taxpayer’s circumstances.
Second, the fixed-dollar component of the per-taxpayer, per-issuer limitation increased from $10 million to $15 million for qualifying post-enactment stock. The alternative limit of ten times the shareholder’s basis remains available, and the applicable limitation is generally the greater of the two.
Third, the gross-asset threshold increased from $50 million to $75 million, also indexed from 2027. This expands the opportunity for capital-intensive businesses, including life sciences, climate technology, advanced manufacturing and hard technology, where a financing round could previously have pushed the company beyond the threshold.
The foundational rules remain. The shares generally must be issued by a domestic C corporation, acquired at original issuance and held by a non-corporate taxpayer. The business must satisfy the active-business requirements and cannot fall within an excluded sector. We have seen C corporations converted to S corporations for near-term tax reasons without sufficient attention to the QSBS value that could be lost. Understanding the opportunity must therefore be followed by a disciplined review of the risks.
What Do Founders Most Often Get Wrong About QSBS?
The three most common mistakes we see are assuming shares qualify, waiting until a transaction is already in motion, and treating an estate plan as fixed. QSBS qualification depends on facts, records and timing. Trusts and estate plans that worked when shares had modest value may need to be revisited as the company, the family and the expected transaction evolve.
As mentioned, founders often assume that their stock will qualify for QSBS. But a cap table does not prove QSBS status. Qualification may turn on the company’s assets at issuance, the nature of its business, whether the shareholder acquired the stock directly from the company and whether the corporate structure changed. Founders should seek written confirmation while records are readily available, not during transaction diligence.
This is the most common, but not the only mistake that we see.
The second is waiting for a deal to become tangible. Founders are understandably focused on the buyer, employees and commercial terms. But once negotiations are advanced or a letter of intent has been signed, transfers to trusts or family members may be challenged under assignment-of-income or step-transaction principles. Planning before a sale is foreseeable is very different from moving shares after the outcome has effectively ripened.
The third is treating an estate plan as fixed. One client initially funded an irrevocable Delaware dynasty trust with low-value founder shares. Years later, a significant sale became likely. The original grantor-trust structure had worked well while the stock produced little taxable income, but the realization event changed the analysis: the founder faced tax on both personally held shares and the trust’s gain, while the trust was projected to hold far more for descendants than the family had expected.
The original planning was not wrong; it worked well enough until that point, but then a new solution was required. Sophisticated planning should create flexibility, but it also requires regular review. Our team assessed whether the trust should become a non-grantor trust, whether additional trusts were appropriate, how much wealth the founder wished to retain and how much was enough for future generations. Once these fundamentals are determined, the next question is whether the exclusion can extend beyond one taxpayer.
Using Multiple Exclusions With Purpose
QSBS stacking can be powerful, but it should not be treated as a default strategy. The question is not only whether multiple exclusions may be available, but whether the resulting structure supports the founder’s liquidity needs, family objectives, governance preferences and long-term intentions for the wealth.
Because the Section 1202 cap applies per taxpayer, per issuer, appropriately structured non-grantor trusts may each have their own exclusion. This can create the opportunity often described as QSBS stacking. A founder expecting $60 million of gain might, in the right circumstances and sufficiently early, transfer shares to several separate trusts and potentially increase the aggregate exclusion. Of note, separate taxpayer treatment is not established merely by using separate trust instruments; the analysis depends on the structure, administration, beneficial interests, timing, substance and applicable anti-abuse principles.
Technical availability is also not the same as suitability. Multiple trusts add administrative, fiduciary and family complexity. The expected gain must justify that complexity, the trusts need distinct terms and purposes, and their situs matters because state taxation can erode the federal benefit. Delaware, South Dakota and Nevada are often considered, but the right jurisdiction depends on the family. Additionally, state treatment does not necessarily follow federal law and may change, so state residency, source-income and trust-situs consequences require separate analysis.
More fundamentally, planning should begin with people rather than exemption amounts. How much should remain available to the founder and spouse? How much is appropriate for children, and in what form? Are beneficiaries ready to manage wealth? A structure created years before a sale may remain tax-efficient but no longer reflect the family’s intentions and needs. Trust modification, decanting and reformation may be helpful to amend the structure to better reflect changing family dynamics.
Questions Founders Should Ask Before a Sale Is Foreseeable
Before implementing a stacking strategy – or making any other pre-sale transfer – founders should use these questions to test both QSBS eligibility and whether the wider plan still fits their family, balance sheet and likely transaction timetable.
- Has qualified counsel documented whether each block of stock is QSBS, including shares acquired under different pre- and post-OBBBA rules?
- Could a change in corporate form, financing or business activity jeopardize eligibility?
- If a sale occurred within the next one, three or five years, which planning opportunities would still be available?
- Does the expected gain justify trust planning, and would the proposed structures reflect the family’s objectives, as well as the tax opportunity?
- How will state residency and trust situs affect the result?
- Should philanthropic planning occur before a sale, while shares can still be contributed rather than after proceeds have been received?
- If the company sells sooner than expected, which choices would still be available and which would be already lost?
- Who is responsible for coordinating the investment, tax, legal, fiduciary and family decisions?
Section 1045 may provide an option when timing cannot be controlled. A shareholder who has held QSBS for more than six months may be able to reinvest proceeds into replacement QSBS within 60 days, defer gain and carry over the original holding period. It is a specialized strategy for those prepared to remain invested in qualifying small businesses. Together, these questions show why QSBS planning naturally opens into a broader conversation about the family’s post-sale life.
How Does QSBS Planning Connect to Broader Wealth Planning?
QSBS planning often becomes the entry point for a broader pre-liquidity plan. Once the tax opportunity is understood, founders also need to decide how much wealth to retain, how much to transfer, how to prepare heirs, how to structure philanthropy and how to invest proceeds after a sale.
A liquidity event can transform a family’s financial life as much as its balance sheet. In the example above, the QSBS analysis led to a review of wills, revocable trusts, beneficiary provisions, investment strategy and family governance. The family began working with us on how and when to discuss wealth with children and considered whether a donor-advised fund or private foundation better suited its philanthropic goals. The answer depended on the family’s desired level of control and involvement, not simply the available deduction.
AlTi’s role is to connect these decisions rather than address them in silos. Each relationship can bring together an investment adviser, wealth planner, fiduciary counsel and, where appropriate, trust administration, family governance and family-office specialists. The internal team develops a shared view of the client’s objectives and coordinates with independent attorneys, accountants and other advisers. In the case above, when the existing CPA relationship no longer met the family’s needs, AlTi helped identify and interview a replacement and brought that adviser into the planning process.
Coordination continues after the technical strategy is selected. As a family moves into a different level of wealth, the work may include balance sheets and cash-flow reporting, tax-return reviews, insurance coordination and preparing the investment portfolio for sale proceeds. Family-office professionals may meet with a family weekly during this phase, while the planning, fiduciary and investment teams remain aligned behind the scenes. The aim is to reduce what the client must coordinate personally and prevent one recommendation from creating a problem elsewhere.
The impact of early coordination can be considerable. In another engagement involving the sale of a family-owned global business, the advisory relationship developed over several years before the sale. Planning included restructuring, trusts for children and grandchildren, and charitable vehicles. Estimated combined capital-gains, gift and estate-tax savings were meaningful. The example also shows that tax savings are only one measure of success: the family later needed to reconsider whether too much had been transferred to the next generation.
Planning Before Choices Become Irreversible
The new QSBS rules create more opportunity, but they do not reduce the need for early planning and sound judgment. A partial exclusion may help when a sale cannot wait. Stacking may be powerful when the expected gain, family purpose and trust design support it. A philanthropic vehicle may reduce tax, but it should also fit the family’s desired level of control. AlTi’s planning process weighs these trade-offs together rather than recommending different solutions in isolation.
The process begins with a comprehensive view of the family’s assets, liabilities, estate documents, prior gifts, liquidity needs and goals. The team models outcomes, pressure-tests recommendations with outside counsel and tax advisers, and sequences implementation. Internally, the investment, wealth-planning and fiduciary teams consider the decisions likely to follow, allowing the family to move through the plan in manageable stages without losing sight of the whole.
The work continues after implementation. We generally encourage an annual review, with additional discussions when the company approaches a financing or sale, changes its tax status, the family expands, or the expected value of the shares changes materially. The answer to ‘How much is enough?’ may change. Trusts may need modification, philanthropy may become more important and the post-sale investment plan may need to balance diversification with further entrepreneurial risk.
By the time a transaction is certain, the work often shifts from creating opportunities to preserving those that remain.
Starting planning early gives founders more choices and gives an integrated team time to coordinate tax, estate, fiduciary, investment and family decisions. The goal is not simply to maximize a tax exclusion, but to help the family retain control, reduce complexity, decide what their wealth is ultimately for and make deliberate choices to support those values.
Frequently Asked Questions About QSBS After OBBBA
These answers summarize points covered in the article. QSBS eligibility and planning outcomes depend on the facts, the applicable acquisition date, federal and state law, and advice from qualified tax and legal professionals.
Do all QSBS shares receive the new OBBBA benefits?
No. The article explains that the expanded rules generally apply to qualifying stock acquired after July 4, 2025. Shares acquired earlier may be governed by the previous framework, so different blocks of stock may require separate analysis.
Does a cap table prove that stock qualifies as QSBS?
No. Qualification may depend on the company’s assets at issuance, the nature of its business, how the shareholder acquired the stock, and whether the corporate structure or business activity changed.
Can non-grantor trusts each use a separate QSBS exclusion?
Appropriately structured non-grantor trusts may each have their own exclusion because the Section 1202 cap applies per taxpayer, per issuer. Separate taxpayer treatment depends on the facts and is not established merely by creating separate trust instruments. Suitability depends on timing, trust terms and purposes, administration, state taxation, and the family’s objectives.
What if qualifying stock must be sold before five years?
For qualifying post-July 4, 2025 stock, the article describes a partial exclusion after three or four years. Section 1045 may also provide a rollover option in some circumstances when QSBS has been held for more than six months, subject to detailed requirements and limitations.
When should QSBS planning begin?
Planning generally should begin before a sale is foreseeable. Once negotiations are advanced or a letter of intent has been signed, transfers may face assignment-of-income or step-transaction challenges and some planning choices may no longer be available.
How does AlTi help founders with QSBS planning?
AlTi helps founders view QSBS as part of a broader wealth plan, coordinating tax, estate, fiduciary, philanthropic, investment and family-governance decisions with the founder’s outside legal and tax advisers.
1The new rules generally apply to qualifying stock acquired after July 4, 2025. Because QSBS generally must be acquired at original issuance, the acquisition and issuance dates will often coincide, but particular facts, including certain transfers and exchanges, should be reviewed separately.