Driving in the USA: A UK Expat's Guide to State Licences, Imports and DOT/EPA Rules

Unlike the UAE or Australia, the United States has no single federal driving licence system — each of the 50 states sets its own rules for accepting or converting a foreign licence. Some states, like Virginia and Maryland, allow UK licence holders to exchange their licence for a state one without a written or road test provided the exchange happens within a set window of establishing residency. Others, including New York and California, generally require new residents to pass both a written knowledge test and a practical road test regardless of how long they've held a UK licence, though a UK licence typically lets you skip any mandatory learner's permit holding period. Always check your specific state's Department of Motor Vehicles (DMV) website, since rules and reciprocity change periodically.

Most states allow visitors and very new residents to drive on a valid UK licence accompanied by an International Driving Permit (IDP) for a limited period, typically up to the time you're required to obtain a state licence — usually within 30 to 90 days of establishing residency depending on the state. Since a UK licence is in English already, the IDP mainly serves as a translation aid and additional form of ID that some car rental firms and traffic officers expect to see, so it's worth obtaining one from the AA or Post Office before travelling even though it isn't always strictly required.

The US National Highway Traffic Safety Administration (NHTSA) generally only permits import of vehicles that were originally manufactured to US Federal Motor Vehicle Safety Standards (FMVSS), which most UK-market cars were not. Practically, this means a UK car is importable without extensive (and often prohibitively expensive) modification only if it is 25 years or older, qualifying for the NHTSA's 'show or display' exemption or the age-based exemption that removes the FMVSS compliance requirement entirely. Younger vehicles typically cannot be legally imported for road use at all, regardless of duty paid, which surprises many UK expats who assume paying import tax is the only obstacle.

Separately from NHTSA safety rules, the Environmental Protection Agency (EPA) requires imported vehicles to meet US emissions standards or qualify for an exemption — generally vehicles 21 years or older are treated as exempt from EPA emissions certification. Because both the 25-year NHTSA rule and the roughly 21-year EPA exemption need to be satisfied, in practice only genuinely older or classic UK vehicles can be imported straightforwardly; anything newer typically requires a Registered Importer to modify the vehicle to comply, an expensive and often impractical route for an ordinary family car.

Where import is possible, US customs duty on passenger cars is 2.5% of value (25% for trucks, under the so-called 'chicken tax'), plus state sales tax on registration which varies from 0% in states like Oregon to over 8% in states like Louisiana. Given the safety and emissions hurdles, most UK expats moving to the US simply sell their UK car before departure and buy locally once settled, which avoids the compliance complexity entirely — importing is really only worthwhile for classic, vintage or specifically collectible vehicles.

Beyond licensing, the core adjustment is driving on the right-hand side of the road, which affects everything from roundabout (traffic circle) navigation to lane positioning on multi-lane highways. Right turns on red lights are permitted in most states after a full stop unless signed otherwise, something that doesn't exist in the UK and initially confuses many new arrivals. Speed limits are posted in miles per hour (a rare point of familiarity for UK drivers) but enforcement, school bus stopping laws (it's illegal to pass a stopped school bus with flashing lights in both directions on most roads) and four-way stop etiquette all differ meaningfully from UK norms.