QSBS stacking takes two distinct forms. Trust stacking (sometimes called vertical stacking) creates multiple exclusion buckets for a single company's gain by transferring shares to multiple separate non-grantor trusts, each treated as an independent Section 1202 taxpayer. Portfolio stacking (sometimes called horizontal stacking) applies the per-issuer rule to maximize exclusions across multiple qualifying companies within a single taxpayer or trust.
Note: The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, increased the per-taxpayer exclusion cap to $15 million for QSBS issued after July 4, 2025. The $10 million cap continues to apply to stock issued on or before that date. References throughout this page reflect both thresholds where relevant.
Under 26 U.S.C. § 1202, each qualifying noncorporate taxpayer may exclude up to $10 million (or $15 million for QSBS issued after July 4, 2025), or 10 times their adjusted basis, whichever is greater, in gain from the sale of qualified small business stock of a particular issuer. Trust stacking leverages this per-taxpayer structure by transferring shares to multiple irrevocable non-grantor trusts or family members before a liquidity event. Each recipient may claim a separate exclusion if the transfer occurs before the sale and the other Section 1202 requirements remain satisfied. When executed correctly, a single founder’s exit may be sheltered by multiple stacked exclusions rather than just one.
A founder holding $40 million in QSBS gain who gifts shares to four properly structured irrevocable non-grantor trusts prior to sale, each treated as a separate Section 1202 taxpayer, could potentially exclude up to $10 million per trust for pre-OBBBA stock, or up to $15 million per trust for stock issued after July 4, 2025, versus the single cap available to the founder alone.
A single irrevocable non-grantor trust that holds QSBS in three separate qualifying issuers, for example, a technology company, a life sciences company, and a clean energy company, may claim a separate Section 1202 exclusion for each issuer. The per-issuer rule means the trust's exclusion ceiling is not shared across those positions. Allegis Law structures both vertical and horizontal approaches; this page focuses on trust stacking.
Spousal Lifetime Access Trusts (SLATs) and Domestic Asset Protection Trusts (DAPTs) are among the most frequently used structures for trust stacking (vertical stacking). Each may qualify as an independent taxpayer for Section 1202 purposes when properly designed as a non-grantor trust. The same non-grantor trust structures used for vertical stacking can also hold QSBS across multiple issuers, making them useful vehicles for portfolio stacking (horizontal stacking) as well. (Note: SLATs are most commonly structured as grantor trusts, which do not create a separate taxpayer for Section 1202 purposes. A SLAT that functions as a stacking vehicle requires a specific non-grantor trust design, an outcome that depends on careful drafting and is not the default.)
(Note: Grantor Retained Annuity Trusts (GRATs) are grantor trusts for income tax purposes and do not create a separate taxpayer during the annuity term. A GRAT does not multiply the Section 1202 exclusion at the trust level. GRAT remainder interests passing to non-grantor trusts at term-end may qualify, but that structure requires separate analysis and careful legal design. Note that the GRAT term must run long enough for the underlying stock to satisfy the applicable Section 1202 holding period before the remainder passes. A short-term GRAT does not automatically deliver a stacking benefit.)
QSBS exemption stacking involves unsettled legal questions and is subject to IRS scrutiny, particularly when trust structures lack legitimate non-tax purposes or are implemented without careful documentation. As noted in Qualified Small Business Stock: Gray Areas in Estate Planning (The Tax Adviser, April 2024), navigating these ambiguous areas of Section 1202 requires experienced legal counsel, not a generic financial planning template.
When properly designed and documented, stacking can be a powerful pillar of a comprehensive exit plan. Careless execution creates compliance exposure that can unwind the exclusion entirely.
The issuing company must be a domestic C-corporation at the time of original stock issuance. Its aggregate gross assets must not have exceeded $50 million at issuance for pre-OBBBA stock, or $75 million for stock issued after July 4, 2025. The active business test requirements must be satisfied, and the shares must be held for more than five years for stock issued on or before July 4, 2025.
For stock issued after that date, partial exclusions under the OBBBA tiered schedule are available at three and four years. C-corporation structuring decisions made at formation can determine whether a founder qualifies for Section 1202 exclusions, making early planning essential.
Founders and business owners holding appreciated Section 1202 stock have a time-sensitive opportunity to multiply their capital gains exclusion through QSBS trust stacking, but only when the strategy is in place before a deal is signed.
Book a QSBS Tax Strategy Session with Rustin Diehl at Allegis Law to find out exactly where you stand and what a coordinated stacking plan could mean for your exit. Call (801) 938-4035 or schedule a consultation online today.
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