United States v. New Mexico

Background

Three private companies — Sandia Corporation, the Zia Company, and Los Alamos Constructors (LACI) — managed Government-owned nuclear research facilities under long-term DOE (formerly AEC) management contracts. The contracts reimbursed the contractors for costs and paid fixed fees in some cases. They used an advanced funding system where Treasury funds were deposited in a special bank account and contractors drew drafts to pay vendors and employees. New Mexico levied a gross receipts tax and a compensating use tax on businesses operating in the State. The United States sued, arguing that the advanced funding and contract terms made the contractors immune from state taxation. The District Court agreed with the Government, but the Court of Appeals reversed, and the Supreme Court agreed to decide the legal question.

Reasoning

The core question was whether the State could constitutionally tax these contractors or whether the contractors were so closely linked to the Federal Government that taxation would be a tax on the United States itself. The Court emphasized that constitutional immunity from state taxation applies only when a levy falls directly on the United States or on an entity truly incorporated into the government. Reviewing earlier cases, the Court found these contractors were private, pursued commercial ends, made purchases in their own names, received fees or other benefits, and were not government instrumentalities. Advanced funding and contract language recognizing agency for some purposes did not turn them into governmental parts. On that basis, the Court held the State taxes valid.

Real world impact

The decision means states may collect sales, gross receipts, and compensating use taxes from private firms that manage federal facilities when those firms act as independent commercial entities. It preserves the narrow scope of constitutional tax immunity and signals that only Congress can create broader statutory immunity for contractors.