Substantiation, Partner Basis, and Methodologies: An Analysis of West v. Commissioner
West v. Commissioner, T.C. Memo. 2026-105, Oct. 7, 2026
The petitioner, Andrew B. West, was an entrepreneur involved in various commercial activities during the 2015 and 2016 taxable years, operating primarily in Texas. During these years, Mr. West owned three limited liability companies: MPC Equipment, LLC; ABW Equipment Rentals, LLC; and Tilden Operating Management, LLC. On his federal individual income tax returns (Forms 1040), Mr. West reported these business activities across three separate Schedules C: Schedule C-1 for “Management Services,” Schedule C-2 for “MPC Equipment LLC,” and Schedule C-3 for “ABW Equipment Rentals LLC.” In addition to his own entity operations, Mr. West was employed by Oscar Leo Quintanilla to manage Mr. Quintanilla’s extensive business interests, which spanned oil and gas, cattle operations, and real estate development. Under a 2011 employment agreement with Paloma Cattle Co. Ltd., Mr. West served as president and CEO of several Quintanilla-owned entities and was entitled to an “Operating Bonus” equal to 6% of aggregate business profits.
The financial relationship between Mr. West and Mr. Quintanilla was highly intertwined and characterized by informal, centralized accounting. Mr. Quintanilla’s accountants managed a centralized bill-paying apparatus that paid expenses for Quintanilla entities as well as personal and business expenses incurred directly by Mr. West or his LLCs. Expenses paid on Mr. West’s behalf were centrally billed to him via intercompany invoices, which Mr. West then settled from his personal or LLC bank accounts. Under his employment agreement, Mr. West was entitled to full reimbursement for out-of-pocket expenses incurred on behalf of Quintanilla entities; the court found that this centralized payment structure ensured that reimbursable employment expenses were paid directly by Quintanilla entities and were not borne by Mr. West personally.
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