The FTCA is a limited waiver of sovereign immunity allowing tort suits against the United States for the negligent or wrongful acts of federal employees acting within the scope of employment, under the law of the place where the act occurred. The waiver is not absolute; Congress carved out categories of claims where immunity remains intact.

The most heavily litigated carve-out shields discretionary functions, preserving immunity for policy-based decisions even when the decision was arguably wrong. Other exceptions bar most intentional torts, such as assault, battery, false imprisonment, and misrepresentation, though a separate proviso restores liability for certain intentional torts committed by federal law enforcement officers. Additional exceptions cover claims arising in a foreign country, combatant activities during wartime, and claims arising from the assessment or collection of taxes, among others.

A simulation of a claim against the federal government can model each exception as a binary gate on the relief space — toggling the discretionary-function or intentional-tort exception on and off shows a user how much of the projected trajectory tree simply disappears once an exception applies, independent of how strong the underlying negligence case looks.

Counsel evaluating a claim against a federal agency or employee maps the alleged conduct against each statutory exception early, since an applicable exception is a complete jurisdictional bar rather than a merits defense, and can end the case regardless of how well-documented the underlying harm is.