The type of car you drive and the group it falls into has a big impact on how much you pay for your insurance. Our guide gives you an overview of how UK car insurance groups work and a list of the cheapest cars to cover.

In a nutshell, they are a way of classifying cars based on how much they cost to insure. They're sometimes called car insurance bands, and there are 50 of them in total. Cars in insurance group 1 are the cheapest to insure [i], while cars in group 50 are the most expensive.

The higher groups are usually made up of high-performance cars, like Ferraris, top-of-the-range Jaguars and Porsches. At the lower end, you’ll typically find cars with small engines that produce less than 80 bhp [ii]

Insurance groups for cars are set by the Group Rating Panel, who base their decisions on data from Thatcham Research, the motor insurers' automotive research centre. Some insurers may follow their own ranking, but by and large they all use the same kind of grouping.

To work out which band to put a car into, the Group Rating Panel look at several factors [iii]

It’s easy to do a car insurance group check with Parkers.

Looking for a car that’ll be cheap to insure? Each year AutoExpress compile a list of the most affordable cars. The cheapest cars to insure in the UK in 2025 were:

1. Hyundai i10 1.0 MPi auto Advance (Group 1)
2. Volkswagen Polo 1.0 (80) Life (Group 3)
3. Kia Picanto 1.0 DPi 2 (Group 3)
4. Skoda Fabia 1.0 MPI (80) SE/ Design Edition (Group 4)
5. Toyota Aygo X 1.0 VVT-i (72) Pure (Group 5)
6. Kia Stonic 1.0 T-GDi auto 2/GT-Line (Group 8)
7. Volkswagen Caddy 1.5 TSI (116) SWB (Group 8)  
8. Renault Clio 1.0 TCe 90 Evolution (Group 10)
9. SEAT Arona 1.0 TSI SE Edition (Group 10)

Buying a car in a low insurance group is the most straightforward way. But if you've set your heart on a car in a higher group, don't worry. There are other ways that can help reduce the price of your policy:

• Improve car security: Enhancing your car’s security with things like immobilisers, alarms and trackers can help you get a discount on your insurance. With many newer cars some of these security measures can be included as standard, so make sure you check and let your insurer know.  
• Up your voluntary excess: Increase the amount you could affordably contribute if you need to make a claim. Find out more with our guide to car insurance excesses
• Pay in one go: If you can afford to pay in a lump sum, you can usually avoid paying any interest.
• Add a named driver: Consider adding a family member with plenty of driving experience and a clean record to your policy.
• Keep it simple: Take out a policy that only includes the essentials, so no courtesy cars or breakdown cover. Find a balance between lowering costs and having a policy that meets your needs.
• Add a black box: These are particularly helpful if you’re a new or young driver. It monitors how well you’re driving through a satellite tracker. The steadier you go, the lower your insurance will cost.

Our car insurance FAQs is a good place to start. If you’d like to talk to our friendly team, get in touch. We’d be happy to help.

[i] https://www.carbuyer.co.uk/reviews/recommended/best-insurance-group-1-cars

[ii] https://www.carbuyer.co.uk/reviews/recommended/best-insurance-group-1-cars

[iii] https://www.thatcham.org/what-we-do/insurance-group-rating/the-group-rating-system