Uncategorized

QSBS Stacking and Packing: Multiplying the Section 1202 Exclusion With Trusts and Gifts

By The Ledgerism Editorial Team · The Ledgerism Brief Editorial Team produces original, methodology-disclosed accounting and tax research—data trackers, databases, and reference guides built to be the most-cited source in the field. Every figure is verified against primary sources including FASB, the IRS, the PCAOB, NASBA, the AICPA, and state boards of accountancy.

QSBS stacking is a planning technique that multiplies the Section 1202 gain exclusion across several taxpayers who each own stock in the same company. Because the exclusion cap applies per issuer and per taxpayer, a founder can spread shares to a spouse, children, and non-grantor trusts so each holder claims a separate cap. Done before a sale and within the rules, it can move tens of millions of dollars of gain out of the federal tax base.

What is QSBS stacking and packing?

QSBS means Qualified Small Business Stock under IRC Section 1202. When a holder sells QSBS held more than five years, Section 1202(a) lets the holder exclude eligible gain from federal income tax. The exclusion is not unlimited. Section 1202(b)(1) caps it at the greater of $10 million or 10 times the taxpayer’s aggregate adjusted basis in the stock disposed of during the year.

The critical detail is how that cap is measured. It runs per issuer and per taxpayer. One company is the issuer. Each separate taxpayer who owns stock in that company gets a fresh cap. That structure creates two distinct planning moves.

Stacking increases the number of taxpayers. Instead of one founder claiming one $10 million cap, the founder gifts shares so that a spouse, children, and one or more non-grantor trusts each become separate owners with separate caps. Four taxpayers each holding the same company’s QSBS produce four caps.

Packing works on the other half of the cap formula. It raises the taxpayer’s aggregate adjusted basis so the 10-times-basis alternative exceeds the flat dollar figure. A holder with $3 million of basis in the stock has a 10x ceiling of $30 million, which is larger than the $10 million floor, per IRC Section 1202(b)(1)(B).

How QSBS stacking and packing works (mechanics)

Stacking depends on one provision: IRC Section 1202(h). When QSBS is transferred by gift, the donee is treated as having acquired the stock in the same manner as the transferor and as having held it during the same period the transferor held it. In plain terms, the five-year holding period and the original-issuance requirement tack to the donee. The gifted shares stay QSBS in the recipient’s hands.

That is what makes pre-sale gifting work. A founder who gifts shares to a non-grantor trust does not restart any clock. The trust inherits the founder’s holding period and original-issuance status under Section 1202(h), then claims its own cap under Section 1202(b)(1).

The trust must be a non-grantor trust. A grantor trust is disregarded for income tax: its income is taxed to the grantor under the grantor trust rules in IRC Sections 671 through 679. A grantor trust therefore does not create a separate taxpayer and does not add a cap. A non-grantor trust files its own return, pays its own tax, and counts as its own taxpayer for Section 1202.

Each spouse and each child who receives shares is likewise a separate taxpayer with a separate cap. There is no limit in the statute on how many separate non-grantor trusts a family can establish, though the step-transaction and assignment-of-income doctrines police abuse.

Practitioners watch one further point on trust design. To preserve separate-taxpayer status, each non-grantor trust should have meaningful differences in beneficiaries or terms, not a single template copied many times for the same person. Identical trusts with the same beneficiary, created in quick succession solely to capture extra caps, are the kind of arrangement the step-transaction doctrine targets. Spacing the trusts apart and giving each a real, distinct purpose strengthens the position that each is a genuine separate taxpayer for Section 1202(b)(1).

Packing operates at formation or before issuance. The 10x ceiling equals 10 times the taxpayer’s aggregate adjusted basis in the QSBS. Contributing cash or appreciated property to the C corporation in exchange for stock raises that basis. Contribute $5 million of basis and the 10x ceiling becomes $50 million for that taxpayer, far above the $10 million floor.

Packing has a hard limit. A corporation is a qualified small business only if its aggregate gross assets did not exceed $50 million at all times before and immediately after the stock issuance, per IRC Section 1202(d)(1). The One Big Beautiful Bill Act raised that ceiling to $75 million for stock acquired after July 4, 2025. Contributed property counts at its fair market value at the time of contribution for this test, not its tax basis, under IRC Section 1202(d)(2)(B). Pack too much and the company busts the gross-assets test, disqualifying the stock entirely.

Two more gating rules apply to every share. The issuer must be a domestic C corporation under IRC Section 1202(c). At least 80 percent of the corporation’s assets must be used in the active conduct of a qualified trade or business under IRC Section 1202(e). Service businesses including health, law, accounting, consulting, and financial services, plus banking, farming, and hospitality, are excluded under IRC Section 1202(e)(3).

Stacking versus packing compared

Worked example

A founder owns QSBS in a domestic C corporation acquired in 2024. Because the stock was acquired before July 5, 2025, the pre-OBBBA rules apply: a $10 million base cap and 100 percent exclusion only after the full five-year hold for stock acquired after September 27, 2010, per IRC Section 1202(a)(4). The founder’s basis is low, so the $10 million floor controls rather than the 10x alternative. Anticipated sale gain is $40 million.

Without stacking. The founder excludes $10 million and pays tax on the remaining $30 million. At the top federal long-term capital gains rate of 20 percent plus the 3.8 percent net investment income tax under IRC Section 1411, the combined rate is 23.8 percent. Tax owed is $30,000,000 times 0.238, which equals $7,140,000.

With stacking. Well before any binding sale agreement, the founder gifts QSBS to a spouse and to two separate non-grantor trusts for the children. Each gift tacks the holding period and original-issuance status under IRC Section 1202(h). The result is four taxpayers, each holding QSBS in the same issuer with a separate $10 million cap:

All $40 million is excluded. The tax that would otherwise have applied to $30 million of gain disappears. The saving is $30,000,000 times 23.8 percent, which equals $7,140,000.

Two cautions sit behind that arithmetic. First, the gifts must be complete and the donees must independently own the shares before any binding sale agreement exists, or the IRS can apply the assignment-of-income doctrine and tax the full gain to the founder. Second, the transfers use gift-tax exemption. The 2025 lifetime gift and estate exemption is $13.99 million per individual under Rev. Proc. 2024-40, so the gifts here fit within available exemption for most founders, but the numbers must be checked against prior taxable gifts.

Recent changes (2025-2026)

The One Big Beautiful Bill Act amended Section 1202 for stock acquired after July 4, 2025. Three changes matter for this planning.

First, the base exclusion cap rose from $10 million to $15 million under the amendment to IRC Section 1202(b)(1). Each separate taxpayer in a stacking structure now claims a $15 million floor on newly acquired stock instead of $10 million.

Second, the gross-assets ceiling rose from $50 million to $75 million under the amendment to IRC Section 1202(d). Packing now has more room because a corporation can hold up to $75 million of gross assets and still qualify.

Third, OBBBA added a tiered exclusion for newly acquired stock: 50 percent of gain excluded at a three-year hold, 75 percent at a four-year hold, and 100 percent at a five-year hold. For stock acquired before July 5, 2025, the prior rule stands: full exclusion only after the complete five-year hold for stock acquired after September 27, 2010.

The acquisition date controls which regime applies. Stock acquired in 2024, as in the worked example, keeps the $10 million cap and the all-or-nothing five-year rule. Stock acquired after July 4, 2025 gets the $15 million cap and the tiered schedule. Founders planning gifts should track each tranche’s acquisition date carefully.

The higher caps make stacking more powerful for newly issued stock. Four taxpayers each claiming the post-OBBBA $15 million floor can exclude up to $60 million of gain from a single issuer, compared with $40 million under the prior $10 million floor. The wider $75 million gross-assets ceiling also gives packing room to build larger basis at formation before the qualified-small-business test is breached. Companies that previously sat just under the old $50 million line now have headroom to raise additional capital and still issue QSBS.

Common pitfalls and mistakes

• Using a grantor trust instead of a non-grantor trust. A grantor trust’s income is taxed to the grantor under IRC Sections 671 through 679, so it adds no separate cap. Only a non-grantor trust counts as its own taxpayer.
• Gifting after a binding sale agreement. Once a sale is fixed, the assignment-of-income doctrine taxes the gain to the original owner regardless of who holds the stock at closing. Gifts must precede any binding commitment.
• Busting the gross-assets test while packing. Contributed property counts at fair market value under IRC Section 1202(d)(2)(B). Over-contributing can push aggregate gross assets above the $50 million ($75 million post-OBBBA) ceiling and disqualify every share.
• Holding stock in an excluded business. Health, law, accounting, consulting, financial services, banking, farming, and hospitality are barred under IRC Section 1202(e)(3). No amount of stacking saves stock that never qualified.
• Selling before the five-year hold is met. Section 1202(a) requires more than five years. A holder who must sell early may instead roll gain into new QSBS within 60 days under Section 1045 to preserve the holding period.
• Ignoring the Section 83(b) election for restricted founder stock. A timely Section 83(b) election starts the QSBS clock at grant and fixes basis, which matters for both the holding period and the 10x-basis calculation.
• Step-transaction exposure from rushed structuring. Forming trusts, funding them, and gifting shares in a single compressed sequence tied to an imminent sale invites the step-transaction doctrine. Real separation in time and substance protects the structure.

Frequently asked questions

Does QSBS stacking actually multiply the exclusion?

Yes. Because the Section 1202(b)(1) cap is per issuer and per taxpayer, each additional taxpayer who owns QSBS in the same company claims a separate $10 million (or $15 million post-OBBBA) cap. Four qualifying taxpayers can exclude four caps’ worth of gain.

Why must the trusts be non-grantor trusts?

A grantor trust is disregarded for income tax under IRC Sections 671 through 679; its income flows to the grantor, so it does not create a separate cap. A non-grantor trust files its own return and counts as its own taxpayer.

Does gifting QSBS restart the five-year holding period?

No. Under IRC Section 1202(h), the donee is treated as having acquired the stock the same way the transferor did and as having held it for the transferor’s holding period. The clock and original-issuance status tack to the donee.

When is it too late to gift shares before a sale?

Gifts must be complete before any binding sale agreement exists. After that point the assignment-of-income doctrine taxes the gain to the original owner even if the donee holds the shares at closing.

What is packing and how does it differ from stacking?

Packing raises the 10x-basis alternative cap by contributing high-basis cash or property at or before issuance, increasing a single taxpayer’s cap. Stacking multiplies the number of taxpayers. The two can be combined.

How much basis do I need for the 10x cap to beat the dollar floor?

The 10x cap exceeds the $10 million floor once aggregate adjusted basis tops $1 million, and exceeds the $15 million post-OBBBA floor once basis tops $1.5 million, per IRC Section 1202(b)(1)(B).

Does packing risk disqualifying the company?

It can. Aggregate gross assets must stay at or below $50 million ($75 million for stock acquired after July 4, 2025) at all times before and immediately after issuance under IRC Section 1202(d), with contributed property valued at fair market value under Section 1202(d)(2)(B).

What changed under the One Big Beautiful Bill Act?

For stock acquired after July 4, 2025, the base cap rose to $15 million, the gross-assets ceiling rose to $75 million, and a tiered exclusion applies: 50 percent at three years, 75 percent at four years, and 100 percent at five years.

How much gift-tax exemption does stacking consume?

Each gift uses lifetime gift and estate exemption, which is $13.99 million per individual for 2025 under Rev. Proc. 2024-40. Founders should measure planned gifts against any prior taxable gifts before transferring shares.