Car Insurance Excess UK: Compulsory and Voluntary Excess Explained

What is car insurance excess?

Car insurance excess is the pre-agreed amount you pay out of pocket towards a claim before your insurer covers the remainder. It applies to every claim you make on your own policy, regardless of fault. If your total excess is £400 and the repair costs £900, your insurer pays £500 and you pay £400.

Excess exists for two reasons. First, it discourages policyholders from making small claims that cost more to administer than they are worth. Second, it reduces the insurer's exposure on every claim, which allows premiums to be lower than they would otherwise be.

Every UK motor policy carries two excess components that combine to form your total excess. Understanding the difference between them is the most important thing to get right when comparing quotes.

How car insurance excess works: compulsory, voluntary and total

The total excess on any claim is the sum of your compulsory excess and your voluntary excess. The two types work very differently.

Compulsory excess is set by the insurer based on your risk profile: your age, driving history, vehicle type, and claims record. You cannot negotiate or reduce it. Young drivers aged 17 to 25 typically face compulsory excesses of £200 to £500 on top of the standard level because statistical claims frequency is higher for this group.

Voluntary excess is an additional amount you agree to pay on top of the compulsory excess when you buy or renew your policy. Choosing a higher voluntary excess reduces your annual premium because you are agreeing to absorb more of the first portion of any future claim. Choosing zero voluntary excess keeps your out-of-pocket claim cost lower but results in a higher premium.

Total excess is what you actually pay when you make a claim. The insurer adds your compulsory and voluntary excess together. This combined total is deducted from any claim settlement before the insurer pays the rest.

Worked example: how excess is calculated on a claim

Suppose your policy has a compulsory excess of £250 and you chose a voluntary excess of £150 when you bought the policy. Your total excess is £400.

Your car is damaged in a collision and the repair bill is £1,200. You pay the first £400 (your total excess). Your insurer pays the remaining £800. If the repair had cost only £380, the claim value would be below your total excess and your insurer would pay nothing. In that case, it would generally not be worth claiming at all, since claiming would also likely affect your no-claims discount.

Key considerations when choosing your voluntary excess

Three factors determine the right voluntary excess level for your situation.

Affordability. The most important rule: only choose a voluntary excess you could pay immediately if you had an accident tomorrow. If you set a £400 voluntary excess on top of a £250 compulsory excess, you need to be able to put £650 on the table at short notice. If that would cause financial difficulty, choose a lower voluntary excess even if it means a higher premium.

Premium saving versus excess cost. The premium reduction from increasing voluntary excess tends to be non-linear. Moving from £0 to £100 voluntary excess often produces a larger percentage saving than moving from £300 to £400. Get quotes at multiple excess levels to see where the savings curve flattens. If adding £100 to your excess only saves £15 on the annual premium, the trade-off rarely makes sense.

Your claims risk. If you drive high mileage, park in a high-risk area, or are a newer driver, a lower excess keeps your out-of-pocket exposure manageable when a claim does occur. If you drive low mileage on quiet roads and have a strong no-claims record, a higher voluntary excess to reduce the premium may be a reasonable bet.

Can you get your excess back after a non-fault claim?

If another driver causes an accident and is found fully at fault, you may be able to recover the excess you paid from the at-fault driver's insurer. This process is called excess recovery. In practice, recovery depends on the at-fault driver being insured, being traceable, and their insurer accepting liability. It can take weeks or months.

Some insurers offer protected no-claims discount and excess waiver for proven non-fault claims, but this is not universal and the terms vary significantly between policies. Check your policy wording before assuming your excess will be refunded automatically. The Financial Ombudsman Service receives a significant number of complaints each year from policyholders whose excess was not returned after a non-fault accident. FOS upholds approximately 30% of these complaints where the insurer mishandled the recovery process.

Excess protection insurance is a separate standalone policy (not part of your main car insurance) that reimburses your excess after any claim, regardless of fault. Policies typically cost £10 to £60 per year and cover excess amounts up to £1,000. They are sold by specialist providers and via comparison sites. If you carry a high voluntary excess to reduce your premium, excess protection can make the trade-off more manageable.

Specialist excesses: young drivers, flood and windscreen

Some policies apply additional compulsory excesses to specific claim types beyond the standard motor excess.

Young driver excess is the most common. Insurers routinely apply a named-driver or young-driver compulsory excess of £200 to £500 for drivers aged under 25, on top of the standard policy excess. This applies even if the young driver is a named driver rather than the main policyholder.

Windscreen claims on some policies carry a separate lower excess, often £25 to £75 for repair and £75 to £150 for replacement, distinct from the main policy excess. Making a windscreen claim does not usually affect your no-claims discount, but check your policy schedule.

Flood and subsidence excesses apply on some home insurance policies and occasionally on specialist motor policies. Always check the schedule of excesses in your policy documents, not just the headline excess figure used in comparison.

FCA rules on how insurers must apply excess

Under FCA ICOBS 8.1 (claims handling), insurers must handle claims promptly, fairly, and transparently. This includes correctly applying the excess stated in the policy schedule. An insurer cannot apply a higher excess than was agreed at policy inception, nor change the excess mid-term without proper notification under the policy terms.

If you believe your insurer has applied the wrong excess on a settled claim, you can raise a formal complaint. If the insurer does not resolve it within eight weeks, you can escalate to the Financial Ombudsman Service free of charge. The FOS has jurisdiction over all FCA-regulated motor insurance complaints and can direct the insurer to repay excess that was applied incorrectly.

What is the difference between compulsory and voluntary excess on car insurance?

Compulsory excess is a fixed amount set by your insurer based on your risk profile, including your age, driving history, and vehicle. You cannot reduce or negotiate it. Voluntary excess is an optional additional amount you choose yourself when buying or renewing your policy. Agreeing to a higher voluntary excess reduces your annual premium. Both amounts are added together to form your total excess, which is deducted from any claim settlement before your insurer pays the rest.

Does a higher voluntary excess always mean a lower premium?

Generally yes, but the saving is not always proportionate to the excess increase. Insurers vary in how much they reduce premiums in response to voluntary excess changes. Moving from zero to £100 voluntary excess often produces a larger percentage saving than increasing from £200 to £300. Get quotes at several excess levels to see where the premium saving flattens out. If the annual saving is less than the additional excess you would pay on a claim, the higher excess is unlikely to be good value unless your risk of claiming is very low.

Can you get your excess back after a non-fault accident?

Potentially, through a process called excess recovery. If the other driver is found fully at fault, insured, and traceable, their insurer should reimburse the excess you paid. In practice this can take weeks or months. Some policies include protected excess or excess waiver for proven non-fault claims. Excess protection insurance, bought separately, reimburses your excess after any claim regardless of fault and typically costs £10 to £60 per year. If your insurer fails to pursue recovery on your behalf, you can raise a complaint and escalate to the Financial Ombudsman Service if it is unresolved within eight weeks.

What happens if your claim is less than your excess?

If the cost of the damage is equal to or less than your total excess, your insurer pays nothing. You cover the full repair cost yourself. In this situation it is generally not worth making a formal claim because claiming will likely trigger a review of your no-claims discount, potentially increasing your premium at renewal by more than the cost of the repair. As a rule of thumb, only make a claim if the damage cost is meaningfully above your total excess and you cannot absorb the cost without claiming.

What is excess protection insurance?

Excess protection is a separate, standalone insurance policy that reimburses the excess you pay when you make a claim on your main car insurance, regardless of whether the claim was your fault. It is not part of your standard car insurance policy. Policies typically cost £10 to £60 per year and cover total excess amounts up to £500 or £1,000 depending on the product. They are sold by specialist providers and comparison sites. Excess protection is particularly useful if you carry a high voluntary excess to keep your car insurance premium down, as it limits your actual out-of-pocket exposure when a claim occurs.

What does excess mean in insurance compared to excessive?

In an insurance context, excess (noun) refers to the agreed financial contribution you make towards each claim. It is a technical term specific to UK insurance policy structures. Excessive (adjective) means something that is more than necessary, reasonable, or desirable, for example an excessive premium or an excessive delay in settling a claim. The two words share a Latin root but have distinct meanings. When your insurer refers to your excess, they mean the defined claim contribution amount in your policy schedule, not a subjective judgement about quantity.