Wisconsin Central Ltd. v. United States

Background

The dispute involved several private railroads and the federal government over whether employee stock options count as taxable "compensation" under the Railroad Retirement Tax Act of 1937. Railroads use stock option plans and many employees exercise options using a cashless method that converts the option into money deposited into a bank account. The statute taxes only "any form of money remuneration," raising the question whether stock options qualify.

Reasoning

The Court asked what “money” meant when Congress wrote the law in 1937. The majority relied on ordinary 1930s usage and related tax texts, concluding “money” meant a medium of exchange like currency, not stock. It noted the 1939 Internal Revenue Code and the Federal Insurance Contributions Act treated stock and money differently and found historical IRS and Railroad Retirement Board rules consistent with that difference. The Court therefore held stock options are not "money remuneration" and are not taxable under the Railroad Retirement Tax Act.

Real world impact

The decision reverses the Seventh Circuit and sends the case back for further proceedings consistent with that ruling. Practically, many railroads and railroad employees will not owe Railroad Retirement taxes on stock options under this interpretation. The Court left open that forms of payment that function as modern media of exchange could still qualify as money in other circumstances.

Dissents or concurrances

Justice Breyer’s dissent argued the phrase was ambiguous, that agency interpretations historically taxed stock options, and that common cashless exercises make stock options practically equivalent to pay deposited into bank accounts. The dissent would have upheld taxation.