A non‑resident alien (NRA) is any foreign individual who does not satisfy the U.S. green‑card test or the substantial‑presence test. Treaties generally apply only to NRAs, distinguishing them from residents for tax purposes. Each treaty contains articles that specify which income categories—such as dividends, interest, royalties, or personal services—receive preferential treatment, and they often require a claim on the taxpayer’s return.
The United States has treaties with more than 60 jurisdictions, each with its own schedule of reduced rates or exemptions. The Internal Revenue Code incorporates these treaties through IRC § 894, and the IRS publishes a “Tax Treaty Table” that lists the applicable articles. Understanding the interaction between domestic law and treaty provisions is essential for accurate tax reporting and for avoiding double taxation.