A US federal court vacates the Internal Revenue Service's designation of certain micro-captive insurance arrangements as 'listed transactions', removing a tier of a 2025 rule that had carried penalties of up to US$200,000 and labelled qualifying 831(b) transactions as presumptive tax avoidance. In a 54-page memorandum and opinion issued on 15 April, Senior Judge Lee H. Rosenthal of the US District Court for the Southern District of Texas finds that the Internal Revenue Service (IRS) exceeded its statutory authority in promulgating 26 C.F.R. § 1.6011-10, which had designated qualifying micro-captive transactions as listed transactions under 26 U.S.C. § 6707A(c)(2). The ruling is a significant development for the 831(b) captive sector, which has operated under the shadow of the listed-transaction designation since the Final Rule took effect in January 2025. Section 831(b) captives are a congressionally authorised risk management tool, enacted as part of the Tax Reform Act of 1986 and used by small and mid-sized businesses to insure against risks such as supply chain disruption, cyber exposure, business interruption, and other low-frequency, high-severity events that are increasingly difficult to place in the commercial market. The court upholds the parallel regulation, 26 C.F.R. § 1.6011-11, which continues to require taxpayers to disclose micro-captive arrangements categorised as 'transactions of interest'. Captive owners, managers, and advisors will therefore need to continue evaluating their arrangements against that regulation's criteria. The ruling is issued in Drake Plastics Ltd. Co. et al. v. Internal Revenue Service, in which Drake Plastics Ltd. Co., its affiliated captive Drake Insurance Co., and 831(b) plan administrator SRA 831(b) Admin challenged the IRS's final rule. Under the Final Rule, micro-captive transactions meeting a combination of criteria (a relationship test, a financing factor, and a loss-ratio factor) are split into two tiers. Listed transactions carry penalties of up to US$200,000 (US$100,000 for individuals), with no IRS discretion to rescind them. Transactions of interest carry lower penalties of up to US$50,000 (US$10,000 for individuals). The loss-ratio factor is calculated over a ten-year period, with shorter-lived captives automatically falling into the transactions-of-interest category. Judge Rosenthal rules that while the administrative record supports the agency's 'transactions of interest' designation, the record does not demonstrate that transactions captured under § 1.6011-10 are presumptively not really for insurance, the statutory threshold required to designate a transaction as 'listed'. "Identifying typical features of an abusive transaction does not identify transactions that are typically abusive," the opinion states, adding that neither the Final Rule nor the administrative record contains data on how many captives qualify under § 1.6011-10 or how many of those have been evading taxes. The court declines to issue a permanent injunction, finding that vacatur affords the plaintiffs complete relief. The vacatur is stayed until 1 May 2026 to avoid taxpayer confusion around Tax Day. The case is remanded to the Department of the Treasury and the IRS for further action consistent with the opinion. Dustin Carlson, president of SRA 831(b) Admin, says the decision is a significant win for the small and mid-sized businesses that rely on 831(b) plans for structured risk management. "We stepped into this case because small businesses were being swept into a one-size-fits-all enforcement approach that threatened legitimate risk management strategies," Carlson says. "This ruling restores balance and makes clear that those businesses deserve to be evaluated on facts, not labels." Carlson adds that the decision carries broader implications for agency rulemaking in the wake of Loper Bright Enterprises v. Raimondo, the 2024 US Supreme Court ruling that limited judicial deference to federal agencies. "The court rejected the idea that you can call something a tax shelter first and prove it later," he says. "This decision sends a message well beyond this case. It makes clear that tools like 831(b) Plans must be judged on facts, not assumptions." The remand leaves open the possibility that Treasury and the IRS could re-promulgate a revised listed-transaction rule supported by a fuller administrative record. Judge Rosenthal notes in the opinion that different or altered criteria, such as a lowered modified loss ratio, may be needed to support the required finding of presumptive tax avoidance. For now, captive owners whose arrangements would have fallen under § 1.6011-10 face a materially changed compliance landscape once the vacatur takes effect on 1 May. The Final Rule follows the 2022 vacatur of IRS Notice 2016-166 in CIC Services v. IRS, in which the Eastern District of Tennessee held that the original notice failed to comply with Administrative Procedure Act notice-and-comment requirements. Treasury subsequently conducted full rulemaking before issuing the Final Rule in January 2025. Parallel challenges remain ongoing. The Eastern District of Tennessee granted summary judgment in favour of the IRS on a materially similar challenge in March 2026, while litigation continues in the Northern District of Texas.
