Swiss Licence in the USA 2026: State Rules, mph and 0.08%

Can you drive in the US with a Swiss licence? In practice, yes: visitors hire cars on foreign licences every day. The catch is that there is no national rule to point to. Each of the fifty states decides for itself how long a visitor may drive and on what papers, and no road-traffic treaty links Switzerland and the United States. So the sensible kit is your Swiss licence, an International Driving Permit obtained in Switzerland, and your passport. The side of the road is the same as at home.

Why there is no simple yes

Most licence rules between countries rest on a UN convention. Here neither one fits. The UN Treaty Collection lists Switzerland as having signed the 1949 Geneva Convention without ratifying it, and Switzerland’s active membership is in the 1968 Vienna Convention, which the United States never joined. The US, in turn, ratified the 1949 text. The two countries pass each other without touching.

That leaves the states. A traffic officer in one state and a rental agent in another may each apply different standards. The permit smooths both conversations because it presents your licence details in a standard format with several languages, English among them.

Get the permit before you fly

An IDP is issued by the country that issued your licence, so a Swiss driver cannot pick one up in New York or Los Angeles. Arrange it in Switzerland in good time and check its validity dates against your trip. When booking, ask the hire company in writing whether it needs the permit as well as your licence, and save the reply. Carry all three documents together whenever you drive, including on short trips from the hotel.

Same side, different units

Switzerland and the United States both keep to the right, so there is no mirror-image adjustment at junctions or roundabouts. What changes is the speedometer. US limits are posted in miles per hour, and each state chooses its own. Here is how the Swiss defaults look in American units:

Going the other way, a sign reading 55 means about 88 km/h, and 25 means 40 km/h. On a US rental car the mph scale is the main one, so trust the large figures.

A higher alcohol limit is not a softer one

The WHO profiles give 0.08% for the United States and 0.05% for Switzerland. On paper the American figure is more generous. In reality a drink-driving arrest for a visitor can mean a night in custody, a court appearance that has to be attended, and legal costs that dwarf a Swiss Ordnungsbusse. Keep to zero before driving, especially on a road trip where the next motel is an hour away.

Crossing state lines

A long American road trip may pass through five or six states in a week. Each crossing can bring different speed limits, different phone-use rules and different fines. Three habits help:

• watch for the first speed-limit sign after each border;
• keep the phone in a holder and out of your hand while moving;
• check the rental contract for any states or roads the company excludes.

Speeding fines are set locally and vary widely. The Speeding Fine Calculator gives a rough sense of the range.

One number instead of three

At home you call 117 for police, 144 for an ambulance and 118 for fire. In the United States all three come through 911, from any phone in any state. Note the rental company’s breakdown line separately, since 911 is for emergencies only.

The United States driving guide goes into state differences, and the Driving Permit Checker is a quick cross-check for side trips into Canada or Mexico.

Sources

• UN Treaty Collection, 1949 Convention on Road Traffic (United States ratified 1950; Switzerland signatory only): treaties.un.org
• UN Treaty Collection, 1968 Convention on Road Traffic (Switzerland ratified 1991; United States not a party): treaties.un.org
• WHO Global status report on road safety 2023, United States profile (0.08 g/dl): who.int
• WHO Global status report on road safety 2023, Switzerland profile (0.05 g/dl; 120 km/h motorways): who.int