Atlantic Mut. Ins. Co. v. Commissioner, 523 U.S. 382 (1998)

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382

OCTOBER TERM, 1997

Syllabus

ATLANTIC MUTUAL INSURANCE CO. v. COMMISSIONER OF INTERNAL REVENUE

certiorari to the united states court of appeals for the third circuit

No. 97-147. Argued March 2, 1998—Decided April 21, 1998

Before enactment of the Tax Reform Act of 1986, the Internal Revenue

Code gave property and casualty (PC) insurers a full deduction for "loss reserves": estimated amounts of losses reported but not yet paid, losses incurred but not yet reported, and administrative costs of resolving claims. In each taxable year, not only losses paid, but the full amount of the loss reserves, reduced by the amount of the loss reserves claimed for the prior taxable year, were treated as a business expense. Section 1023 of the 1986 Act required PC insurers, beginning with the 1987 taxable year, to discount unpaid losses to present value when claiming them as a deduction. Requiring insurers to subtract undiscounted year-end 1986 reserves from discounted year-end 1987 reserves in computing 1987 losses would produce artificially low deductions, so the Act included a transitional rule requiring insurers to discount 1986 reserves as well. This rule changed the "method of accounting" for computing taxable income. To avoid requiring PC insurers to recognize as income the difference between undiscounted and discounted year-end 1986 loss reserves, the Act afforded them a "fresh start," to wit, an exclusion from taxable income of the difference between undiscounted and discounted year-end 1986 loss reserves. § 1023(e)(3)(A). It foreclosed the possibility that they would inflate reserves to manipulate the "fresh start" by excepting "reserve strengthening" from the exclusion. § 1023(e)(3)(B). Treasury Regulation § 1.846-3(c)(3)(ii) defines "reserve strengthening" to include any net additions to reserves. Respondent Commissioner determined that petitioner, Atlantic Mutual Insurance Co., and its subsidiary, a PC insurer, made net additions to loss reserves in 1986, reducing the "fresh start" entitlement and resulting in a tax deficiency. The Tax Court disagreed, holding that "reserve strengthening" refers to only those increases that result from changes in computation methods or assumptions. In reversing, the Third Circuit concluded that the Treasury Regulation's definition of "reserve strengthening" is based on a permissible statutory construction.

Held: The Treasury Regulation represents a reasonable interpretation of the term "reserve strengthening." Neither prior legislation nor industry use establishes the plain meaning Atlantic ascribes to that term:

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