If you have a valid license from your home state, you can drive in European countries for up to 90 days without further documentation. However, once you have spent more than 90 days in Europe and wish to continue driving there, it is recommended that you get an International Driver's License (IDL).

For US citizens, the requirement for an International Driving Permit (IDP) in Europe in 2026 depends entirely on the specific country you are visiting. While countries like France, Germany, and Portugal typically accept a valid US driver's license for short-term visits (under 90 days), others like Italy, Greece, and Austria legally require an IDP in addition to your home license. Even in countries where it isn't a legal requirement for the police, many car rental agencies may refuse to hand over the keys without one, as it serves as a standardized translation of your credentials. An IDP is not a stand-alone document; it must be presented alongside your original, valid US license. You can easily obtain one before your trip from AAA for approximately $20. Given the low cost and the potential for heavy fines or being denied a rental, it is widely considered best practice to carry an IDP whenever you plan to drive in a foreign country to avoid any bureaucratic hurdles.