Tax Legal Services · Primary-source case analysis

Gilmore: The Origin of the Claim Controls Deductibility of Legal Fees

By Aneeta Mishra and Timothy Chan

Published September 13, 2026

United States v. Gilmore established the origin-of-the-claim test for classifying legal expenses.

Divorce litigation threatened control of business holdings

A taxpayer incurred legal fees resisting his spouse’s community-property claims. He argued the expense protected controlling interests in automobile dealerships and therefore related to income production.

Potential financial consequences were not the test

The Court rejected classification based on what property might be lost or how seriously the litigation could affect income-producing assets.

The marital claims supplied the origin

The claims arose from the marital relationship, not from profit-seeking activity. Their personal origin controlled even though the contested property included business interests.

The deduction was denied

The Court treated the legal expenses as personal and nondeductible under the provisions at issue. Modern analysis still begins with the claim’s origin while also applying current capitalization and deduction rules.

Key takeaways

• Identify the transaction or relationship that generated the dispute.
• Do not classify fees solely by their financial consequences.
• Allocate fees when separate claims have different origins.
• Apply current deduction and capitalization provisions after classifying the claim.