Class 4 vs Class 7 MOT: Which Do You Need?

What Is the Difference Between Class 4 and Class 7?

The MOT class of your vehicle is set by its type and its weight, not by how you use it. Class 4 is by far the most common and covers ordinary cars, while Class 7 covers the heavier end of the van range.

The dividing line is the design gross weight of the vehicle, which is the maximum weight it is built to carry including its load. A Class 4 MOT covers vehicles up to 3,000kg design gross weight. A Class 7 MOT covers goods vehicles from 3,000kg up to 3,500kg. Above 3,500kg a vehicle moves into commercial HGV testing, which is a separate scheme. If you are unsure what testing is for, our overview on What Is an MOT is a useful starting point.

Getting the class right matters because a garage must be approved for the class it tests. Not every centre is equipped for Class 7, so it is worth checking before you book a larger van in. The good news is that the actual checks are broadly the same across both classes, covering brakes, tyres, lights, steering, suspension and emissions. The difference is the equipment needed to test a heavier vehicle safely, such as a ramp and brake rollers rated for the extra weight.

It is also worth knowing that the class is fixed by the vehicle itself rather than by how you use it. A large van used only for personal trips still needs a Class 7 test if its plated weight sits in that band. A small car used for work stays in Class 4. The paperwork follows the vehicle rather than the driver, so the plated weight is always the deciding factor when there is any doubt about which test to book.

Class 4 vs Class 7 at a Glance

How to Tell Which Class Your Vehicle Needs

For almost every private car the answer is simple, because a standard car is a Class 4 vehicle. The question really matters for van drivers, where the same model can fall into either class depending on the exact variant and its plated weight.

Larger vans put more stress on brakes, tyres and suspension because they carry more weight, so the Class 7 test reflects that heavier duty. If you run a van, our guides on Van MOT Cost and Vans and MOT are worth a look alongside this one.

Where the Other MOT Classes Fit

Class 4 and Class 7 are the two you are most likely to meet, though they are part of a wider set of vehicle classes. Motorcycles and mopeds fall into Class 1 and Class 2, while three wheelers and light quadricycles sit in Class 3. Larger passenger vehicles such as bigger minibuses move into Class 5, which has its own rules for seat numbers. Each class exists so that the test standard matches the way the vehicle is built and used.

For the vast majority of drivers this detail is academic, because a car is Class 4 and a large van is Class 7. It only becomes important if you own something less common such as a motor caravan built on a heavy chassis or a passenger vehicle with a high seat count. In those cases the safest approach is to give your registration to the test centre and let them confirm the class before you book.

A Class 7 test can take a little longer than a Class 4 and is sometimes priced slightly higher, because a larger vehicle takes more time and heavier duty equipment to inspect. Even so, the maximum test fee for both is capped nationally, so you should never be charged more than the set ceiling for your class. If you want to understand what drives the final figure, our guide on Van MOT Cost and the wider MOT Guides hub cover it in full.

Plan Your Van or Car MOT

This guide is part of our full MOT Guides hub, where the testing, cost and rules articles sit together so you can move to the exact detail you need next. When it is time to book, our team offers full MOT testing and repairs from our centre in Ely. You may also find it useful to read Van MOT Cost, Vans and MOT and How Much Does an MOT Cost.

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