QSBS Stacking: How Founders Multiply the Section 1202 Exclusion

A large share of the households we insure on the Eastside got there through startup equity. Founders, early employees, and the first few engineers at a company that worked. If that is you, there is a provision in the tax code that may be worth more than every other planning decision you make, and a surprising number of people find out about it too late to use it.

What qualified small business stock actually is

Qualified Small Business Stock, or QSBS, comes from Section 1202 of the Internal Revenue Code. When stock meets the requirements, a founder or employee can exclude a very large amount of gain from federal tax when they eventually sell.

The core conditions have been stable for years:

1. The company is a domestic C corporation, not an LLC or an S corp.
2. You acquired the stock at original issue, directly from the company, rather than buying it from another shareholder.
3. The company's gross assets were under the statutory ceiling when the stock was issued.
4. The company runs an active qualified business, which excludes most professional services, finance, hospitality, and similar fields.
5. You hold the stock long enough. Historically that meant a full five years for the complete exclusion, and legislation in 2025 introduced partial exclusions at shorter holding periods along with higher caps for newly issued stock.

The per-taxpayer exclusion has traditionally been capped at the greater of $10 million or ten times your basis, with a higher ceiling applying to stock issued after the 2025 changes. Which rules apply to you depends on when your shares were issued, so this is a question for your own counsel rather than a blog post.

For a founder holding stock that goes from near zero to $40 million, the obvious question follows immediately: what happens to the gain above the cap?

The stacking idea

This is where QSBS stacking comes in. The exclusion is per taxpayer, per issuer. A properly structured non-grantor trust is a separate taxpayer. So if a founder gifts shares to several non-grantor trusts for different beneficiaries well in advance of a sale, each trust may claim its own exclusion against the same company's stock.

Done correctly, a single position that would have produced one exclusion can produce several. That is the whole idea, and on a large exit the difference is measured in millions of dollars of federal tax.

Done carelessly, it is exactly the pattern the IRS has been looking at hardest.

Why timing and substance decide the outcome

Through 2026 there has been visible Treasury and IRS attention on aggressive stacking, and the fact patterns drawing scrutiny share a family resemblance:

• Trusts created weeks before a signed deal, when the sale was already a certainty.
• A friendly trustee who is really just the founder in another chair.
• Overlapping beneficiaries across trusts, so the economics never truly leave the founder's control.
• No purpose other than tax, documented nowhere and explainable by no one.

The lesson is not that stacking is improper. It is a planned consequence of how the statute is written. The lesson is that a structure built early, with independent trustees, genuinely different beneficiaries, and a real non-tax reason for existing, looks completely different from one assembled in the final weeks before a closing.

The uncomfortable part is that the window closes quietly. Once a letter of intent exists, the transfers that would have worked a year earlier start to look like something else. If your company is growing and an exit is plausible within a few years, the time to look at this is now, while nothing is imminent.

If you want to go deeper, QSBS stacking is covered in detail at trellatrusts.com, including how the trusts are structured to hold up under review and a free eligibility check for founders who want to know whether their stock even qualifies.

The part that lands back with us

There is a second thing that happens at an exit, and it is the reason this post is on an insurance site.

Liquidity changes your risk profile overnight. A founder whose wealth was locked in illiquid shares was a poor lawsuit target. A founder with cash in the bank, a new house, and a public record of a transaction is a very good one. Plaintiff attorneys read the same news you do.

We have watched clients complete an exit with a carefully engineered tax structure and a $1 million umbrella policy written when they were making $95,000 a year. The tax planning was sophisticated. The liability planning was six years stale.

Both numbers should move at the same time. Before your exit closes, it is worth running the coverage gap calculator to see where your current limits sit against where your net worth is heading, and asking for a free coverage review so the umbrella is resized before the money lands rather than a year afterward.

Nothing here is tax or legal advice. We are insurance brokers, and QSBS questions belong with a qualified tax attorney.

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