License categories are codes that show what vehicles you're legally allowed to drive

Different countries use different letter and number combinations to sort driver's licenses by vehicle type and engine size. The most common system worldwide uses letters A through D, often paired with numbers like 1 or 2. An A1 license lets you ride certain motorcycles; a B license covers cars; a B1 covers small cars in some countries; and B2 is used in a few places for heavier vehicles. The specific rules for each category depend entirely on which country issued your license.

If you're reading this in the United States, your state's license does not use these letter codes. U.S. licenses use class designations like Class D (regular car), Class M (motorcycle), or commercial classes like Class A and B — which are completely different from the international A1, B1, B2 system. If you're moving to or from a country that uses the European or international system, understanding these categories matters for legal driving and insurance.

Key Takeaways

  • A1, B1, and B2 are international license categories used in Europe, Australia, and many other countries, but not in the United States.
  • A1 licenses allow you to ride motorcycles up to 125cc with a maximum power output, typically available from age 16 in most countries.
  • B licenses cover standard cars and small vans, and are the most common category for everyday driving in countries using this system.
  • B1 and B2 are regional variations used in some countries for smaller or heavier vehicles, and their rules differ by location.
  • If you hold a license from one country and move to another, you may need to exchange it or take a new test, depending on bilateral agreements.

A1: Motorcycles with engine limits

An A1 license permits you to ride a motorcycle with an engine no larger than 125 cubic centimeters (cc) and a maximum power output of 11 kilowatts (about 15 horsepower). The motorcycle cannot weigh more than 130 kilograms (about 286 pounds) when empty. These restrictions exist to keep inexperienced riders on lighter, more manageable machines.

In most European countries and Australia, you can take the A1 test from age 16. The test usually includes a written exam on road rules and a practical riding test on a closed course or public roads. Once you pass, you can ride any motorcycle that meets the 125cc and power limits, regardless of the bike's actual age or condition — the limits are about the machine's specifications, not its year of manufacture.

An A1 is often a stepping stone. Many riders use it for a few years, then upgrade to an A2 license (which allows 35 kilowatts, or about 47 horsepower) or a full A license (unlimited power) once they reach the age requirement and pass a new test.

B: Standard cars and small vans

A B license is the most common category worldwide in countries using this system. It covers cars and small vans up to 3,500 kilograms (about 7,700 pounds) with up to nine seats including the driver. You can tow a trailer with a B license, but the combined weight of car and trailer cannot exceed 4,250 kilograms in most places.

The minimum age for a B license is usually 18, though some countries allow supervised driving at 17. The test includes a written exam on traffic laws and a practical driving test, typically on public roads with an examiner in the car. Once you pass, you can drive any car or small van that meets the weight and seat limits — from a compact hatchback to a small SUV.

A B license is what most people think of as a standard driver's license. It's the category you need for everyday commuting, family trips, and rental cars in most countries outside the United States.

B1: Small cars in specific countries

B1 is a regional category used in a small number of countries, primarily in parts of Europe and Asia. It typically covers cars that are lighter or smaller than the standard B category — often limited to 2,000 kilograms or less. The exact rules vary significantly by country, so a B1 license valid in one place may not be recognized in another.

In countries where B1 exists, it's usually positioned between A (motorcycles) and B (standard cars) as a stepping stone for younger or less experienced drivers. Some places allow B1 licensing from age 16 or 17, making it an option for teenagers who want to drive a car before they reach the age for a full B license.

If you're considering a move to a country that uses B1, check with that country's licensing authority about what vehicles it covers and whether your existing license can be exchanged for it. The category is not standardized internationally, so the details matter.

B2: Heavy vehicles in some regions

B2 is used in a few countries, primarily in parts of Asia and the Middle East, to cover heavier vehicles than the standard B category. It may explore to trucks, buses, or large vans that exceed the weight limits of a regular B license but fall short of the requirements for a commercial (C-class) license. Like B1, the exact specifications depend on the country.

B2 licensing typically requires a higher minimum age than B — often 21 or older — and may involve additional medical checks or training. If you need to drive a heavy vehicle in a country that uses B2, you'll need to hold that specific category; a standard B license will not cover it.

Because B2 rules are not standardized internationally, always verify the requirements with the licensing authority in the country where you plan to drive. What counts as a B2 vehicle in one place may fall under a different category elsewhere.

How these categories differ from U.S. license classes

The United States does not use the A1, B1, B2 system at all. Instead, U.S. states issue licenses by class — typically Class D for regular cars, Class M for motorcycles, and commercial classes (Class A, B, C) for trucks and buses. A U.S. Class A or B has nothing to do with the international B1 or B2 categories; they are completely separate systems that happen to use some of the same letters.

If you hold a U.S. license and move to a country using the international system, you will usually need to exchange your license or take a new test. If you hold a foreign license and move to the United States, your home country's license may be recognized temporarily for driving purposes, but you will eventually need to obtain a U.S. license. The rules for recognition and exchange vary by state and country, so check with your new state's Department of Motor Vehicles or your destination country's licensing authority.

License exchange and recognition across countries

Many countries have bilateral agreements that allow drivers to exchange a valid license from their home country for a local license without retaking the test. The European Union, for example, recognizes licenses issued by any EU member state, so you can drive legally in any EU country with your home license and can exchange it for a local one if you move.

Outside the EU, recognition is less consistent. Some countries accept licenses from specific partner nations; others require all foreign drivers to take a local test. Before moving internationally, contact the licensing authority in your destination country to learn whether your current license can be exchanged, what documents you'll need, and whether a test is required.

If you're planning to drive in multiple countries, an International Driving Permit (IDP) can serve as a translation and supplement to your home license, though it does not replace it. An IDP is issued by your home country's licensing authority and is valid for one or three years depending on the type.

Frequently Asked Questions

Can I drive a car in the U.S. with an A1, B, or B2 license from another country?

Yes, temporarily. Most U.S. states recognize valid foreign driver's licenses for a limited time — usually 30 days to one year, depending on your visa status and the state. After that period, you must obtain a U.S. license. Check your specific state's rules, as they vary. You may also want to carry an International Driving Permit as backup documentation.

What's the difference between A1 and A2 motorcycle licenses?

An A1 license covers motorcycles up to 125cc and 11 kilowatts (about 15 horsepower). An A2 license, available from age 18 in most countries, covers motorcycles up to 35 kilowatts (about 47 horsepower) with no engine size limit. A2 is a step up in power and is often pursued after gaining experience on an A1 bike.

If I have a B license, can I tow a trailer?

Yes, but with limits. A B license typically allows you to tow a trailer, but the combined weight of your car and trailer cannot exceed 4,250 kilograms in most countries. If your trailer is heavier, you may need a BE category endorsement. Check your license document or your country's rules for the exact limits.

Do I need a B1 license if I want to drive a small car?

Only in countries where B1 exists as a separate category. In most of Europe and Australia, a standard B license covers all cars up to 3,500 kilograms, so you don't need B1. If you're in a country that uses B1, check whether it's required for the specific vehicle you want to drive or if a B license is sufficient.

What happens if I drive a vehicle I'm not licensed for?

Driving without the correct license category is illegal in all countries using this system and can result in fines, points on your license, or even criminal charges depending on the vehicle and local laws. Insurance may also be void if you're driving outside your license category. Always verify that your license covers the vehicle before driving.