How Does Car Insurance With Excess Work?

You choose a car insurance quote, see an excess figure, and usually focus on the annual premium. The problem is that the excess is the part of the claim you pay yourself, so it affects your payout if you claim.

That matters most after an accident, a write-off, or a non-fault claim where the other driver caused the damage. The excess can be paid upfront, deducted from your final settlement, or later recovered from the at-fault party, depending on how the claim is handled.

Compulsory vs. Voluntary Excess: What's the Difference?

Car insurance excess is the amount you contribute towards a claim before your insurer pays the rest. Put simply, what excess means in car insurance is the part of the loss that remains your responsibility under the policy.

Your policy schedule should show the excesses that apply to your policy, often split into compulsory excess and voluntary excess. If you're looking at car insurance with excess during a quote, the figure that matters at claim stage is usually the total excess.

• Compulsory excess: This is the fixed amount set by the insurer, meaning that you don't get to choose it. Insurers usually set it by looking at risk factors such as the car, the driver's age, driving history, and sometimes the type of claim.

• Voluntary excess: This is the extra amount you choose to add when buying the policy. A higher voluntary excess can reduce the annual premium, but it also increases the amount you pay if you claim.

The calculation is simple: Compulsory excess + voluntary excess = total excess.

So, if your compulsory excess is £250 and your voluntary excess is £250, your total excess is £500. That £500 is the figure that usually matters when the claim is settled.

The important document is your policy schedule. That is where the insurer records the excess agreed for your policy. The policy wording may then explain how that excess is applied in the claims section, the section you are claiming under, or a separate excess section.

Some policies also have different excesses for different claim types. For example, a windscreen excess may be lower than the excess for an accident claim. If there is a difference, the relevant figure should appear in the policy schedule or in the section you are claiming under.

How Your Total Excess Is Deducted During a Claim

If your total excess is £500 and the repair bill is £1,500, your insurer usually pays £1,000 and you pay £500. The money doesn't always move in the same way. In practice, car insurance excess is usually handled in one of two ways.

• Repairs through an approved garage: Your insurer may authorise repairs through their approved garage. When the car is ready, the garage may ask you to pay the excess before they release the vehicle. The insurer usually pays the remaining repair bill directly to the garage.

• Write-off or total loss claim: If the car is treated as a total loss, the insurer may deduct the excess from the final settlement. For example, if the agreed market value is £8,000 and your total excess is £500, the final settlement may be £7,500 before any other policy deductions that properly apply.

This is why the total excess matters more than the voluntary excess on its own. A policy with a low premium can look attractive, but if it carries a high voluntary excess, the out-of-pocket cost at claim stage can be much higher.

Tip: If your insurer sends a settlement breakdown, read the numbers against your policy schedule. The breakdown should make clear what they have deducted and why. If it simply says "excess" without showing how the figure was reached, ask them to explain the calculation in writing.

How Excess Works on a Non-Fault Claim

A non-fault claim means someone else caused the accident, or your insurer expects to recover their outlay from the at-fault party or their insurer. That doesn't necessarily mean you avoid paying the excess at the start, though.

If you claim on your own comprehensive policy, you are asking your own insurer to deal with the damage under your policy. Because the claim is being made under your policy, your own excess usually applies initially, even if the accident was caused by a third party.

To succeed with a claim, you have to show that the insured event happened and what it was worth. The policy documents may list preferred evidence, but any reasonable form of proof can be enough. In a motor claim, that might include:

• Repair invoices;
• Photographs;
• Engineer's reports;
• Valuation evidence;
• Correspondence;
• Other records that support the amount being claimed.

This is the part that often feels wrong to policyholders. If the other driver caused the accident, paying an excess upfront can seem like paying for someone else's mistake. But in insurance terms, the first question is whose policy is being used to fund the repair or settlement now. If it is your own comprehensive policy, the excess can apply first, and recovery can come later.

Note: The difference between an at-fault claim and a non-fault claim may also impact your no claims bonus, renewal premium, and how the claim is recorded. Since those points depend on the policy terms and the final position on liability, we recommend checking these against your policy wording and renewal documents rather than making assumptions.

Recovering Your Excess From the At-Fault Party

Your excess is usually treated as an uninsured loss. That means it is a loss you paid yourself rather than an amount covered by your own insurer's settlement.

Once liability is resolved with the third party's insurer, your excess is often refunded if the other side accepts responsibility or your insurer recovers their outlay. The exact timing, however, will depend on the facts of the accident, the third party's position, and the recovery process.

Motor legal protection, also called legal expenses cover, is often used to recover uninsured losses such as your excess from the at-fault driver or their insurer. If you bought it, it may appear in your policy schedule, and the details should be in the legal expenses or motor legal protection section of your policy wording.

Recovery can be more complicated where the other driver is uninsured or can't be identified after a hit and run. In that situation, check the motor legal protection or legal expenses cover section of your policy wording, and ask your insurer to explain in writing whether any uninsured driver benefit, excess refund term, or recovery process applies.

If your insurer says the claim is now settled as non-fault but the excess has not been refunded, ask them to confirm:

• Liability position: Whether the third party or their insurer has accepted liability.
• Recovery position: Whether your insurer has recovered their outlay from the third party's insurer.
• Excess status: Whether your excess is being refunded, and if not, the reason they are relying on.
• Policy basis: Which part of the policy wording or settlement breakdown they say allows them to keep the deduction.

That gives you a clear paper trail. It also separates the practical issue – whether the refund has been processed, from the argument issue – whether the insurer has a proper basis for keeping the excess deduction.

Disputing an Unfair or Incorrect Excess Deduction

Most excess disputes are not about whether an excess exists at all, but if the insurer uses the wrong figure, applies the same excess twice, or keeps an excess deduction after a non-fault claim has been resolved. A sensible challenge keeps the evidence, procedure, and argument separate.

Here are the steps to making an effective car insurance claim:

1. Check the compulsory excess and voluntary excess recorded for your policy. This is the main document for confirming the total excess agreed when you bought the cover.

2. Read the section you are claiming under, and any excess wording in the claims section or general conditions. This helps show whether the insurer has applied the correct excess to the correct type of claim.

3. Compare the deduction against the policy schedule. If your total excess is £500, the settlement should not show two separate £500 deductions unless the insurer can explain a proper policy basis for doing so.

4. If the claim has been settled as non-fault, ask whether the third party's insurer has accepted liability and whether your excess is due to be refunded.

5. If the insurer refuses to correct the deduction, set out the numbers in writing and ask them to identify the policy wording they are relying on.

Ideally, your formal complaint should identify the policy schedule figure, the deduction made, the reason you say it is wrong, and the outcome you are asking the insurer to consider.

For example, if the policy schedule shows a £250 compulsory excess and a £250 voluntary excess, the total excess is £500. If the final settlement breakdown deducts £1,000 as "excess" without another clear policy basis, your insurer needs to explain why the deduction is more than the total excess shown.

How SmarterClaims Can Help

If your insurer has made an unfair excess deduction, SmarterClaims can help you put the issue in the right terms. That includes deductions made twice, deductions based on the wrong excess figure, or an unreasonable refusal to refund an excess after a non-fault claim has been settled.

SmarterClaims can review the insurer's correspondence and your policy documents, identify arguments relevant to the deduction, explain relevant rules, and draft a structured rebuttal letter for you to review, sign, and send yourself. Where FCA claims-handling rules are relevant, the letter can cite those rules and explain how they apply to the deduction being challenged.

About SmarterClaims

SmarterClaims is built on the 40-year playbook of Steve Smart, former UK General Counsel at AIG and current Chairman of Lancashire Insurance UK, with a background as a solicitor and Lloyd's broker.

More than £25M has been recovered in refused claims using this playbook. That figure does not promise any outcome in an individual claim.

Final Thoughts

Car insurance excess is simple once you separate the parts. The compulsory excess is set by the insurer, the voluntary excess is the amount you chose, and the two together make the total excess that usually affects your claim.

The practical point is to check the settlement breakdown against your policy schedule. If the wrong figure has been used, the excess has been deducted twice, or a non-fault refund has not been explained, challenge the deduction in writing and ask the insurer to identify the policy basis for their position.

Frequently Asked Questions

Is it better to have a high or low voluntary excess?

Can I refuse to pay my car insurance excess?

What is considered to be a reasonable excess for car insurance?