An AC class license is for riding motorcycles and motorized bicycles in most Australian states

An AC class license is a motorcycle license category that permits you to ride motorcycles up to a certain engine size, depending on which Australian state or territory issues it. The specific power and engine limits vary by state — some define AC by engine displacement (measured in cubic centimeters or cc), others by power output in kilowatts (kW). The license also typically covers motorized bicycles and scooters below a threshold size.

The AC class sits between the lighter AM class (for smaller scooters and mopeds) and the heavier A class (for unrestricted motorcycles). If you hold an AC license, you can legally ride motorcycles within that state's power and size limits on public roads. You cannot ride anything larger or more powerful without upgrading to an A class license.

The exact engine size or power limit for AC varies significantly. In some states, AC covers motorcycles up to 35 kW (47 horsepower) and 350 cc. In others, the threshold is different. You need to check your specific state's road rules or licensing authority website to know the precise limits that explore where you live.

Key Takeaways

  • An AC class license permits you to ride motorcycles and motorized bicycles up to a state-specific engine size or power limit.
  • The engine displacement and power thresholds for AC differ between states, so you must check your state's road rules to know what you can legally ride.
  • AC sits between AM (small scooters and mopeds) and A (unrestricted motorcycles) in the license hierarchy.
  • You must hold a valid AC license and wear a helmet to ride a motorcycle in that class on public roads; riding without the correct license class is a traffic offense.

How AC class limits differ by state

Each Australian state and territory sets its own motorcycle license classes and power thresholds. This means an AC license issued in New South Wales does not automatically carry the same riding permissions in Victoria or Queensland. If you move interstate or plan to ride in another state, you need to check that state's specific rules.

Some states use engine displacement (cc) as the measure, others use power output (kW), and some use both. A motorcycle that falls within the AC limit in one state might exceed it in another. Before you buy a motorcycle or ride across a state border, confirm the AC class definition in the state where you plan to ride most often.

Your state's road authority — such as the Roads and Maritime Services (RMS) in NSW, VicRoads in Victoria, or the equivalent body in your territory — publishes the exact AC class specifications. Their website or a phone call to their licensing division will give you the precise engine size and power limits that explore to you.

How to obtain an AC class license

The process for obtaining an AC class license involves a written knowledge test, a practical riding test, and a period of supervised or restricted riding, depending on your age and state. Most states require you to hold a learner's permit (L-plate) for a minimum period — typically several months — before you can sit the practical test.

During the learner phase, you must ride under restrictions: you cannot ride alone, must display L-plates, cannot ride at night in some states, and must wear high-visibility gear. You also cannot ride on certain roads such as motorways. These restrictions exist to build your skills in lower-risk conditions before you take the practical test.

The practical test assesses your ability to control the motorcycle, perform emergency stops, navigate turns, and follow road rules. You must pass this test on a motorcycle within the AC class limit. Once you pass, you receive your AC class license and the learner restrictions lift, though some states impose a probationary period with modified rules for new riders.

What you cannot ride with an AC license

An AC license does not permit you to ride motorcycles that exceed your state's power or engine size limit for that class. If you own or want to ride a larger or more powerful motorcycle, you must hold an A class license. Riding a motorcycle outside your license class is a traffic offense and can result in fines, demerit points, and license suspension.

You also cannot ride a motorcycle with an AC license if you do not meet your state's age requirements for that class. Most states require you to be at least 16 or 17 years old to hold an AC license, though the exact age varies. If you are younger, you may only hold an AM class license for smaller scooters and mopeds.

An AC license does not cover cars, trucks, or other motor vehicles. If you want to drive a car, you need a separate car license (usually C class). Holding an AC license does not give you any driving rights beyond motorcycles and motorized bicycles within the specified size and power limits.

AC license restrictions and conditions

Many states impose additional conditions on new AC license holders, particularly riders under a certain age. These may include restrictions on carrying passengers, riding at night, or riding on certain roads. Some states require new riders to display P-plates (probationary plates) for a set period, similar to car driver probation.

You must also comply with general motorcycle safety rules: wearing an approved helmet at all times, carrying a valid license, and following all road rules. Failure to wear a helmet or riding without a valid license is a separate offense from riding outside your license class.

If you accumulate demerit points through traffic offenses, your AC license can be suspended or cancelled. The number of points needed to trigger suspension varies by state. You should check your state's demerit point system to understand how traffic offenses affect your riding privileges.

Upgrading from AC to A class

If you want to ride larger or more powerful motorcycles, you can upgrade from AC to A class. The process typically requires you to hold an AC license for a minimum period (often 12 months), then sit another practical test on a motorcycle within the A class limit. Some states may waive the written test if you already hold an AC license.

The A class practical test is more demanding than the AC test because you are riding a heavier, more powerful machine. You must demonstrate control and safety skills on a larger motorcycle. Once you pass, your license is upgraded and you can ride any motorcycle without power or engine size restrictions.

The minimum age to hold an A class license is higher than for AC in most states — typically 24 years old, though some states allow it at 20 with restrictions. Check your state's rules to see whether you meet the age requirement and how long you must hold an AC license before upgrading.

Frequently Asked Questions

Can I ride a 350cc motorcycle with an AC license?

It depends on your state's definition of AC class. In some states, 350 cc is within the AC limit; in others, it exceeds it. Check your state's road rules or contact your licensing authority to confirm the exact engine displacement limit for AC in your area.

Do I need an AC license to ride a motorized bicycle?

Most motorized bicycles and scooters below a certain engine size (often 50 cc) fall under the AM class, which requires a separate license. However, some larger motorized bicycles may fall within the AC class limit. Your state's road authority can tell you which license class applies to the specific machine you want to ride.

What happens if I ride a motorcycle that is too powerful for my AC license?

Riding a motorcycle outside your license class is a traffic offense. You can be fined, receive demerit points, and have your license suspended or cancelled. The penalty varies by state and the severity of the offense.

Can I ride interstate with my AC license?

Your AC license is valid in other states, but the motorcycle you ride must comply with that state's AC class limit. If your motorcycle exceeds the power or engine size limit in another state, you cannot legally ride it there, even though it is within the AC limit in your home state.

How long do I have to hold an AC license before I can upgrade to A class?

Most states require you to hold an AC license for at least 12 months before you can sit the A class practical test. Some states have different minimum periods depending on your age. Check your state's licensing rules for the exact requirement.