Insurance groups explained: why lower groups don't (always) mean lower prices

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How insurance groups work
How insurance groups are decided
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Insurance groups and prices

There are lots of things that affect the price of your car insurance, from your age to your job.

One of the big ones is the insurance group that your car falls into.

Here's how it all works. 👇

How insurance groups work

Every car in the UK is added to an insurance group. Insurance groups start at 1 and go all the way up to 50.The higher the car insurance group, the more it adds to the price of your car insurance. That's the general rule.

Vans are also put into insurance groups. Since 2016, the highest van insurance group has been 30. Before that, it was 20.

PS: only UK cars go in an insurance group. Imported cars don't. That's one of the reasons imported cars can be more expensive.

You can look up your car's insurance group with our insurance group checker and you can check your car's import status with our free car checker. Easy!

Here's a quick video explainer:

Check your insurance group 👇
Enter your reg number to find out what insurance group your car's in. Learn more

How insurance groups are decided

There's more to figuring out car insurance groups than just the value of your car. It's based on a lot of different things.

The standard car insurance groupings are based on insurance group ratings from a company called Thatcham. Every time a car is released in the UK, one of the cars has to be sent to Thatcham.

They then spend all day crashing those cars and seeing what happens to them. Think crash test dummies!

Off the back of all that, they come up with the car insurance groups. And for the most part, that's what insurer's use. But different insurers might also have their own ways of working out car insurance groups.

All cars are sorted into insurance groups
All cars are sorted into insurance groups

It's usually based on things like:

  • How much your car is worth new. Newer, more valuable cars tend to go into higher insurance groups.
  • The cost of repairing any damage to the car. More expensive, or rarer, cars are more expensive to repair.
  • How long it takes to repair the car.
  • The cost and availability of parts for that car.
  • Speed and power of the car. People tend to make more insurance claims on faster, more powerful cars. So high-performance cars - those with larger engines, generally - usually go into higher insurance groups.
  • Safety features. The more safety features a car has, the less likely someone will get hurt if that car is involved in a crash. Which means insurers are less likely to have to pay out lots of money. So those cars tend to go in a lower insurance group.

The age of your car doesn't directly affect the insurance group it goes in. But there's a lot of correlation. Newer cars tend to have more safety features, but they're also (often) more expensive to repair.

How van insurance groups are decided

Van insurance groups are worked out in pretty much the same way. But insurers also tend to look at:

  • The weight of the van.
  • Security features. If you're insuring a van for business, you can often get a lower car insurance premium if your van has plenty of built-in security features.

The big list of insurance groups

We've done a few sepate guides on some individual insurance groups and their cars.

Click through below for a more detailed look.

How your car's insurance group affects the price of your car insurance

In theory, cars in higher insurance groups are more expensive to insure than cars in lower insurance groups.

But in practice, that's not always the case. That's because the insurance group of the car is only one thing insurers look at when working out the price of your car insurance.

They also look at things like your:

Higher insurance group cars tend to be more expensive to insure
Higher insurance group cars tend to be more expensive to insure

And the way people with a similar "profile" to you drive different kinds of cars will also affect how much you have to pay to get insured on the same car.

It sounds complicated. And that's because, most of the time, it is.

Let's look at an example. 👇

Let's say you're 25. You're trying to decide whether to buy car model A or car model B. To help you make your decision, you're looking at which one will be cheaper to insure.

Car model A is in insurance group 10. Car model B is in insurance group 20.

You'd think that would make car model A cheaper to insure.

But, based on your insurer's data, 25-year-olds tend to make a lot more claims on car model A than they do on car model B. So even though car model B is in a higher insurance group, it will be more expensive than car model A.

And it's because of how people like you tend to drive those cars.

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Updated on 3rd April 2023