The qualified small business stock (“QSBS”) exclusion rule under IRC § 1202 is one of the most advantageous and well-known tax breaks in the Internal Revenue Code when it comes to avoiding capital gains. When the right conditions are satisfied, individual shareholders can generally exclude gains from selling or liquidating stock in certain small businesses from federal capital gains tax, provided that the exclusion is limited, i.e. capped, by the greater of (i) 10 times the aggregate adjusted basis or (ii) $10 million (or $15 million if the stock was issued after July 4, 2025).  However, some stakeholders may be unaware that this already lucrative tax break can be leveraged even further through careful estate planning and gifting to circumnavigate these caps and exclude even greater amounts from capital gains tax, a strategy commonly known as QSBS stacking. Stacking works by spreading QSBS ownership among multiple qualifying taxpayers before a sale

Sidestepping the complexities of the QSBS requirements, let’s assume that a fortunate shareholder of stock in a qualifying start-up corporation is on track to recognize $15 million in capital gains from the sale of QSBS that was issued in 2012, has been held for five years, and has an adjusted basis of zero (in other words, apply the 100% exclusion rate and a $10 million exclusion cap). In the absence of a stacking plan, when the shareholder sells the QSBS, the shareholder would exclude the first $10 million of gain but pay tax on the remaining $5 million gain pursuant to the § 1202 exclusion caps.

Critical to QSBS stacking strategies, these exclusion caps apply on a per-taxpayer and per-issuer basis. In effect, this means that all individual taxpayers, including non-grantor trusts, each have their own separate QSBS exclusion cap. In the example above, if the shareholder had instead gifted $5 million of QSBS to either a family member or non-grantor trust prior to the sale, no capital gains tax would be owed by the shareholder, who has a $10 million cap, and no capitals gains would be owed by the giftee, who has a separate $10 million cap. Therefore, the entire $15 million gain would be tax free. Importantly, stock received as a gift qualifies as “acquired at original issuance” for QSBS purposes and retains the donor’s original basis and holding period.

As a caveat, gifting QSBS to a spouse is also an option and some taxpayers may prefer this route as it would likely preserve their lifetime gift exemption. However, spousal stacking raises separate-filing, joint-filing, ownership, and community property issues that should be reviewed before relying on a separate exclusion amount. Notably, for married couples filing separately, Section 1202 divides the applicable exclusion cap between each spouse rather than providing each spouse with a separate exclusion cap. In contrast, the statute is silent on whether couples who file jointly each retain their own separate exclusion cap. Furthermore, in community property states like Washington, it may be necessary to take additional steps to ensure that the stock is treated as the spouse’s separate property.  For these reasons, it may be advisable to utilize stacking strategies backed by non-grantor trusts.

At a high level, the QSBS exclusion rules seem self-explanatory; they allow shareholders to exclude gains on the sale of qualified stock in qualified businesses from federal capital gains tax. But the devil is in the details.  There are numerous complex requirements within § 1202 that can potentially disqualify stock from tax free QSBS treatment. Determinative factors include corporate entity choice, active business requirements, gross asset thresholds, shareholder holding periods, and corporate redemption activity. Much has been written about these requirements and the potential pitfalls they pose, and we strongly recommend taxpayers consult with their tax professionals before filing for the exclusion.

Compliance with QSBS requirements and implementation of related stacking strategies can rarely be accomplished at the last minute. These efforts should be part of long-term exit strategies and are dependent on decisions made years in advance. Therefore, it is highly recommended to consult with tax professionals early on, especially in situations where the potential gain begins to approach $10 million. On the flip side, it is also never too late. For example, organizing a start-up as an LLC is not necessarily a deal-breaker if careful steps are taken to convert the LLC to a c-corp, and shareholders have the patience to wait out holding requirements before selling stock. If you would like more information about QSBS requirements and stacking strategies, please contact one of our business/tax attorneys at Lasher.