In brief
In Kadau v. Commissioner (Kadau II),1 the United States Tax Court held that taxpayer's microcaptive insurance arrangement lacked economic substance and was subject to the increased penalty under section 6662(i). The Tax Court relied on its opinion in Patel v. Commissioner2 in determining that the arrangement both did not meaningfully change taxpayer's nontax economic position and did not have a substantial nontax purpose.
Background
In Kadau I, the Tax Court disallowed deductions under section 162 for amounts paid by the taxpayer to purported captive insurance companies.3 As a part of this determination, the Tax Court found that contracts issued by the two microcaptive insurance companies were not insurance contracts and that the policies had no legitimate purpose. In Kadau II, the Tax Court considered whether the taxpayer was liable for increased penalties under section 6662(i) for inadequate disclosure of transactions the IRS claimed were lacking economic substance under section 7701(o). The Tax Court's analysis began with determining whether the transactions at issue lacked economic substance, as the prior opinion refrained from that decision pending Patel. In Patel, the Tax Court confirmed a 20% penalty under section 6662(b)(6) applies if the “lack of economic substance” is “the cause of the disallowance of the claimed tax benefit.” Section 6662(i) increases this penalty to 40% for any portion of the underpayment attributable to one or more inadequately disclosed noneconomic substance transactions.
Section 7701(o) analysis
Unlike in other recent cases decided under section 7701(o), the Tax Court did not need to address whether section 7701(o) imposed a threshold relevancy requirement before its application, as the taxpayer conceded section 7701(o) was applicable because he formed a small captive insurance company. The Tax Court's analysis is therefore focused on the substantive application of section 7701(o)(1). This analysis is split into two parts based on the two prongs of section 7701(o), objective and subjective, both of which must be met in order for a transaction to have economic substance.
In considering whether the taxpayer met the objective prong of the section 7701(o)(1) analysis, the Tax Court held that the transactions did not result in a meaningful change in economic position for several reasons. The insurance company did not receive any claims for the first four years at issue, and when it did receive three claims in the latter two years, the taxpayer was the sole approver of the payments, stating "there was no need for an independent adjustor." Furthermore, the Tax Court found that the premium payments to the captive insurance companies were circular in nature, with the taxpayer never losing control of his money. Relying on its reasoning from Patel, the Tax Court held that a circular flow of funds among related entities does not result in a meaningful change in economic position.
The Tax Court also analyzed the subjective prong of the section 7701(o)(1) analysis despite it being unnecessary due to the transactions failing the objective prong. In determining that the transactions lacked a substantial nontax purpose, the Tax Court noted that the premiums were not actuarially determined, were not negotiated at arms-length, and were between 2.5 and 3.5 times more than the previous commercial policies held by the taxpayer's operating business. In addition, the Tax Court found that the captive investing in life insurance for the taxpayer as one of its primary assets indicated that the transactions lacked a nontax business purpose. This led the Tax Court to compare the captives to a "structural shell for Mr. Kadau's estate planning," lending to the conclusion that the transactions lacked a substantial nontax purpose.
Section 6662(i) penalty
When determining if increased penalties under section 6662(i) applied, the Tax Court cited Patel for the standard of adequate disclosure required under section 6662(i). For a disclosure to be adequate, the Court said that the taxpayer's return "must be sufficiently detailed to alert the Commissioner and his agents as to the nature of the transaction so that the decision as to whether to select the return for audit may be a reasonably informed one.” Because none of the taxpayer's returns reflected a connection to the microcaptive arrangement, the Tax Court concluded that the taxpayer failed to meet the level of disclosure required, and the 40% penalty under section 6662(i) was applied to the underpayment.
The implications
The Tax Court's continued scrutiny of microcaptive insurance arrangements under section 7701(o) illustrates the importance of contemporaneous analysis and collection of documents reflecting the economic consequences and business purposes of such arrangements. In addition, the Tax Court's imposition of the section 6662(i) penalty underscores the importance of adequately disclosing transactions that may implicate the economic substance doctrine. Although taxpayers are on notice regarding microcaptive arrangements, given the IRS position that there is no “relevance” requirement, there is significant uncertainty for taxpayers on when the IRS may seek to challenge even standard transactions under section 7701(o), which in turn results in uncertainty on whether disclosure needs to be provided. This concern is especially acute because an opinion from a tax advisor cannot protect a taxpayer from the section 6662(i) penalty, with disclosure being the sole path to a reduced penalty. The legislative history to Section 7701(o) and the amendments to the penalty provisions confirm that “outside opinions or in-house analysis would not protect a taxpayer from imposition of a penalty if it is determined that the transaction lacks economic substance or fails to meet the requirements of any similar rule of law.”4
* * * * *
Jamison Huseth, Summer Associate, has contributed to this legal update.
1 T.C. Memo. 2026-37.
2 165 T.C. No. 10 (2025).
3 Kadau v. Commissioner, T.C. Memo. 2025-81.
4 H.R. Rep. No. 111-443, Vol. I, at 304 (2010).