Skip navigation
 and get a quote faster

Modified car insurance


Many drivers like to improve the way their car looks and performs, but modifications like these can impact your insurance.

Three modified sports cars with body kits

Alloy wheels, spoilers and souped-up engines can all help you enjoy your car, and often increase its value.

But there is one major drawback to these kinds of modifications: they’re likely to increase the cost of your insurance.

Why modifications make policies more expensive

When insurers set the price of car insurance policies, they take a number of factors into account. This includes the value of the car they’re covering, its likelihood of being involved in an accident, and its risk of being stolen.

Modifications can have a significant impact on some of these factors.

For example, improvements to your car’s appearance can increase its attractiveness to thieves. The higher your insurer considers the risk of theft to be, the higher your premiums will be.

Similarly, if your car is more powerful than the standard model, it’ll be considered more likely to be involved in an accident, and suffer more expensive damage. In both cases, the cost of cover will be increased.

Finally, if the modifications have boosted your car’s value, then the potential cost of replacing it will be higher. This again will be reflected in your policy price.

Telling your insurer about changes

Man talking on the phone with his computer

When you get a quote, you’ll be asked if your car has been modified from its original factory condition.

If you don’t mention any changes that could affect a potential insurer’s view of the car, you could end up with invalid cover. Any claim you make could be turned down if the insurer finds out that your car is different to what you stated in your application.

Modifications while your policy is in force

If you already have insurance when you make changes to your car, you should inform your insurer. Failing to do so could also lead to your policy being invalidated – it’s not enough to let the insurer know when you come to renew.

What changes should you inform your insurer about?

Your insurer doesn’t need to know about every little change you make. If you have a new paint job, for example, that’s probably not going to affect your car’s performance or value greatly, so there’s no reason to tell your insurance provider.

You should bear in mind the factors listed above: if the modification could have an effect on the performance or value of the car, or its probability of being stolen, then let your insurer know. If in doubt, you should give the provider a call to check.

Other ways to save

Cars ontop of money

If your modifications have pushed up the cost of cover, some of these tactics could help to bring it back down:

  • Raise your excess - you can cut your premiums by opting for a larger voluntary excess. So if you agree to pay the first £250 of any claim rather than just the first £100, your policy could cost less. Only ever choose a level of excess you can afford though.

  • Beef up your security - if your car is fitted with an alarm or immobiliser, it should be harder to steal. This should lead to lower insurance costs.

  • Add a named driver - if you’re relatively inexperienced on the roads, this is probably making your insurance more expensive. By adding a more experienced named driver – such as a parent – to the policy, you could see premiums fall.

  • You can find more ways to save in our guide to driving down the cost of car insurance.


Tagged under:

Car insurance

Compare up to 127 car insurance providers.

Get a quote

More articles