The IRS, Trust Stacking,
and qualified small business stock

Qualified Small Business Stock, commonly called QSBS, is stock issued by an eligible domestic C corporation that satisfies the requirements of Internal Revenue Code Section 1202. When all requirements are met, a noncorporate shareholder may exclude some or all of the capital gain from selling the stock.

The Section 1202 exclusion allows eligible founders, employees, and investors to exclude qualifying gain from the sale of Qualified Small Business Stock. The available exclusion depends on when the stock was acquired, how long it was held, the shareholder’s basis, and whether the issuing company satisfied the QSBS requirements throughout the relevant period.

For qualifying stock acquired after July 4, 2025, the maximum eligible gain is generally the greater of $15 million per taxpayer, per issuing corporation, or 10 times the taxpayer’s qualifying basis in the shares sold. For qualifying stock acquired on or before July 4, 2025, the dollar limit is generally $10 million or 10 times qualifying basis.

The 2025 legislation increased the gross-asset eligibility ceiling from $50 million to $75 million for stock issued after July 4, 2025. It also increased the dollar exclusion limit to $15 million for qualifying post-enactment stock and introduced tiered exclusions of 50% after three years, 75% after four years, and 100% after five years.

Stock acquired after July 4, 2025, may qualify for a 50% exclusion after three years, a 75% exclusion after four years, and a 100% exclusion after five years. Most qualifying stock acquired on or before July 4, 2025, must be held for more than five years to receive the Section 1202 exclusion.

QSBS trust stacking is an estate and tax-planning strategy in which a shareholder transfers qualifying stock to additional taxpayers, often separate non-grantor trusts, before the stock is sold. If each recipient is respected as a separate taxpayer and the other Section 1202 requirements are satisfied, each recipient may potentially use a separate per-issuer QSBS exclusion.

QSBS trust stacking is not automatically illegal, because Section 1202 expressly allows QSBS status and holding periods to carry over in certain gifts. However, the IRS may challenge arrangements involving artificial trust creation, retained control, substantially identical trusts, prearranged sales, or transactions primarily designed to avoid tax.

The government is concerned that taxpayers may divide one economic investment among numerous trusts to multiply exclusions far beyond the amount one shareholder could claim directly. Section 1202 authorizes Treasury to issue anti-abuse regulations, and Section 643(f) allows multiple trusts to be treated as one when they have substantially the same grantors and beneficiaries and a principal purpose is tax avoidance.

A properly structured non-grantor trust may potentially be treated as a separate federal income-tax taxpayer and claim its own Section 1202 exclusion. The result depends on the trust’s terms, beneficiaries, control provisions, tax classification, ownership of the shares, and whether the trust is respected as substantively independent from the grantor and other related trusts.

A grantor trust generally does not receive a separate QSBS exclusion from its owner because the trust is normally disregarded for federal income-tax purposes. Income, deductions, credits, and gains attributable to the trust are generally reported by the person treated as the trust’s owner.

Qualified Small Business Stock can generally be transferred by gift without automatically losing its QSBS character. Under Section 1202(h), the recipient is treated as acquiring the stock in the same manner as the transferor and may receive credit for the transferor’s prior holding period.

A qualifying gift generally does not restart the QSBS holding period. The recipient is ordinarily treated as holding the shares during the transferor’s continuous holding period immediately before the gift.

The Internal Revenue Code does not establish a simple family-wide numerical limit on QSBS exclusions. Separate individuals and qualifying non-grantor trusts may potentially receive separate exclusions, but each taxpayer must independently satisfy the applicable rules, and the IRS may combine or disregard trusts that lack meaningful economic and administrative independence.

Several trusts with the same primary beneficiary should not automatically be assumed to qualify for separate exclusions. Section 643(f) permits two or more trusts to be treated as one when they have substantially the same grantor and primary beneficiaries and a principal purpose of the structure is avoiding federal income tax.

A founder should begin QSBS and estate planning well before negotiating or signing a sale agreement. Transfers made after a buyer has been identified, material sale terms have been agreed upon, or the shareholder has a fixed right to receive sale proceeds may face assignment-of-income, substance-over-form, or step-transaction challenges.

The issuer must generally be a domestic C corporation, and its aggregate gross assets must not exceed the applicable ceiling before and immediately after the relevant stock issuance. During substantially all of the shareholder’s holding period, at least 80% of the corporation’s assets by value must generally be used in one or more qualified active businesses.

Section 1202 generally excludes businesses involving health, law, accounting, consulting, financial services, brokerage services, banking, insurance, financing, investing, farming, hotels, motels, restaurants, and certain businesses dependent primarily on an employee’s reputation or skill. A company’s eligibility depends on its actual operations, not merely the industry description used on its website or tax return.

An LLC membership interest or S corporation share does not itself qualify as QSBS because Section 1202 requires stock in a domestic C corporation. An LLC may elect or convert to C corporation status, but stock issued in connection with the conversion must independently satisfy the original-issuance, asset, active-business, and holding-period requirements.

Post-July 4, 2025 stock may qualify for a partial exclusion after three or four years. A taxpayer who has held QSBS for more than six months may also consider a Section 1045 rollover, which can defer eligible gain when replacement QSBS is purchased during the 60-day period beginning on the sale date.

Assume a founder owns post-July 4, 2025 QSBS with a projected $45 million gain and holds it for at least five years. If the founder retains one-third and makes completed, well-documented gifts of the remaining shares to two genuinely independent non-grantor trusts, the founder and trusts might each claim up to a $15 million exclusion, potentially covering the entire $45 million gain. The result is not automatic: the stock, gifts, trusts, timing, beneficiaries, governance, valuations, and sale process must withstand IRS scrutiny.