Quick Summary
Section 1202 gives founders and early investors a powerful federal tax exclusion on gains from qualified small business stock, and most people familiar with QSBS understand the basics. What fewer founders know is that the exclusion is applied per taxpayer, per issuer, which creates a deliberate opportunity to multiply it through careful gifting and trust strategies.
With the One Big Beautiful Bill raising the exclusion cap to $15 million per taxpayer, the math on QSBS stacking has never been more compelling. This article explains how the strategy works, who qualifies, and what has to happen before your deal closes.
Most founders who have gone through fundraising or have been advised by a good CPA already know what QSBS is. They know that Section 1202 of the Internal Revenue Code provides an exclusion from federal capital gains tax on the sale of qualified small business stock, and they know that the exclusion can be worth tens of millions of dollars when it applies.
What many of those same founders do not know is that the exclusion is not a single pot that a founder claims once. It is a per-taxpayer, per-issuer benefit. Every individual taxpayer who holds qualified stock in a single company can claim their own exclusion. That structure creates a planning opportunity that most advisors never raise, and that opportunity has grown significantly under post-OBBBA rules.
Covello Tax Law works with founders and early-stage investors on exit planning strategies designed to maximize after-tax liquidity. QSBS stacking, done correctly, is one of the highest-leverage tools available in that process.
What the Per-Taxpayer Rule Actually Means
Section 1202 limits the exclusion to the greater of $10 million (now $15 million under the One Big Beautiful Bill) or 10 times the taxpayer’s adjusted basis in the stock, per issuer. The key phrase is “per taxpayer.”
If you hold $50 million in QSBS gains and file taxes individually, you can exclude up to $15 million at the federal level. That is a significant benefit. But if you and your spouse each hold qualifying stock with $50 million in combined gains, you are not capped at $15 million total. Each of you can claim your own $15 million exclusion, because each of you is a separate taxpayer.
Extend that logic further, and the math gets interesting quickly. If you have three adult children who hold qualifying QSBS, and if you have established a non-grantor trust that holds qualifying QSBS, you have created multiple separate taxpayers, each eligible for their own exclusion.
This is QSBS stacking. It is not a gray area. It is the explicit structure of the statute.
How Stacking Is Accomplished Through Gifting
The most common way to stack the QSBS exclusion is through completed gifts of qualifying shares to other taxpayers before a sale. The most frequent recipients are:
- Spouses. A gift to a spouse who does not already hold your company’s QSBS gives that spouse their own exclusion on the transferred shares, assuming the other Section 1202 requirements are met.
- Adult children. Gifts to adult children who are independent taxpayers create separate exclusion pools. Minors who are subject to the “kiddie tax” present different considerations, and the planning requires more care.
- Non-grantor trusts. A properly structured non-grantor trust is a separate taxpayer for income tax purposes. Shares transferred to a non-grantor trust may be eligible for their own Section 1202 exclusion.
The holding period is a critical factor. Under the statute, the donee (the recipient) tacks the donor’s holding period for purposes of the five-year holding requirement. In plain terms, this means that if you have held your QSBS for four years and gift it to your adult child, your child’s holding period includes your four years. The clock does not restart. That tacking rule makes it feasible to gift shares closer to an anticipated exit without necessarily blowing through the five-year requirement.
However, timing still matters. Gifts made after a letter of intent has been signed, or after negotiations with a buyer are substantially complete, may be scrutinized under the step-transaction doctrine, which could collapse the gift and the sale into a single transaction for tax purposes. The gift needs to be completed before the deal is effectively done. That window is earlier than most founders assume.
The $15 Million Cap Under the One Big Beautiful Bill
The One Big Beautiful Bill increased the per-taxpayer, per-issuer exclusion cap from $10 million to $15 million and indexed it for inflation going forward. That change materially affects the stacking calculation.
Under the prior $10 million cap, a founder and their spouse together could exclude up to $20 million in QSBS gains at the federal level. Under the new $15 million cap, that same couple can exclude up to $30 million. Add a non-grantor trust and an adult child, and the combined exclusion pool grows substantially.
For founders with highly appreciated QSBS in companies with meaningful exit valuations, the difference between doing this planning and not doing it can represent millions of dollars in federal capital gains taxes that are simply not owed.
Non-Grantor Trusts and QSBS
The trust dimension of QSBS stacking deserves particular attention because it involves some nuance that generic tax advice often misses.
A grantor trust is not a separate taxpayer for income tax purposes. Income earned by a grantor trust is taxed to the grantor. That means that QSBS held inside a grantor trust does not get its own $15 million exclusion, because the exclusion runs through the grantor, who already has their own exclusion.
A non-grantor trust, by contrast, is a separate taxpayer. QSBS held in a properly structured non-grantor trust that meets all of the Section 1202 requirements can claim its own exclusion.
The design of the trust matters. The trust needs to be a non-grantor trust at the time the QSBS is sold. It needs to have received the shares in a qualifying transfer. And it needs to have met the holding period requirement, subject to tacking. Getting all of these elements right requires deliberate drafting, not off-the-shelf documentation.
What Still Applies: The Underlying QSBS Requirements
Stacking multiplies the exclusion, but it does not create an exclusion where one does not exist. The shares being transferred still need to satisfy all of the underlying Section 1202 requirements:
- The corporation must be a domestic C corporation at the time of issuance.
- The shares must have been acquired at original issue, not in a secondary market purchase.
- The corporation’s aggregate gross assets must not have exceeded $50 million at the time of issuance (and at any time before issuance in the same tax year).
- The taxpayer must have held the shares for more than five years.
- The corporation must have been an active business in a qualifying trade or business throughout substantially all of the taxpayer’s holding period.
Before pursuing any stacking strategy, a thorough review of whether the underlying shares actually qualify under Section 1202 is essential. Many founders assume their QSBS qualifies when the facts are more complicated than they appear.
The State Tax Consideration
Federal QSBS stacking only addresses federal capital gains tax. Several states, most notably California, do not conform to Section 1202 at the state level. In California, the full gain on a QSBS sale is subject to state income tax regardless of how clean the federal exclusion is. Founders in high-tax states face a materially different calculus than founders in states that have adopted the federal exclusion or that have no state income tax at all.
High-tax state considerations in exit planning deserve their own analysis, particularly for founders in California, New York, and other states where the state treatment of QSBS does not match the federal rules. For national and multi-state planning purposes, the interaction between federal QSBS strategy and state tax law is part of every engagement Covello Tax Law handles.
The Timing Problem That Kills Most Stacking Strategies
The most common reason that founders cannot execute a stacking strategy is not legal, technical, or structural. It is timing. The planning has to happen before the deal is substantially locked. Once a letter of intent is signed, once a buyer has been identified and negotiations are advanced, the opportunity to make legitimate pre-sale gifts that will withstand IRS scrutiny narrows significantly.
Founders who begin thinking about QSBS stacking after they have received an offer typically find that the window has closed, or that the gifts they can still make are small enough that the exclusion benefit is marginal.
The founders who benefit most from stacking are the ones who begin the conversation with a tax attorney while a potential exit is on the horizon but before it becomes imminent. That timing window is often twelve to twenty-four months before a transaction closes.
Working with Covello Tax Law on QSBS Strategy
Every engagement at Covello Tax Law is handled directly by Dustin Covello. Dustin brings experience from BigLaw, boutique practice, and in-house legal strategy to every exit planning and tax optimization engagement. When Dustin reviews a QSBS position, the analysis covers not just whether the exclusion applies, but whether the planning structure around it is designed to hold up to IRS scrutiny and whether there are opportunities to multiply the benefit through strategies like stacking.
The strategies Covello Tax Law implements are designed, documented, and tested to meet the highest legal standards. That is not a marketing phrase. It reflects the reality that any strategy that does not anticipate how the IRS will examine it is not a strategy worth building on.
Contact Dustin for a confidential conversation about your tax strategy. Email dustin@covellotaxlaw.com or use our secure form.
