Your car insurance policy contains two numbers that quietly determine how much of your own money you hand over after an accident: your compulsory excess and your voluntary excess. Added together, they form the total excess - the amount you pay out of pocket before your insurer contributes a single penny to a claim. Get this right and you can shave a meaningful sum off your annual premium without taking on financial risk you cannot afford. Get it wrong and you could find yourself unable to make a sensible claim, or facing a bill far larger than expected after a crash.
This guide cuts through the jargon to explain exactly how UK car insurance excess works, what drives each component, what really happens when you call to make a claim, and how to set your voluntary excess at a level that genuinely serves your interests rather than just looking impressive on a comparison website.
What Is Car Insurance Excess?
Excess is the portion of any claim that you agree to fund yourself. If you claim £900 for a damaged bumper and your total excess is £400, your insurer pays £500 and you pay the first £400. If the repair bill is £350 - below your £400 total excess - your insurer pays nothing at all. Making a formal claim in that situation could still affect your no-claims discount (NCD) even though you received no money, which is a counterintuitive possibility worth understanding before you pick up the phone after a minor scrape.
The excess figure on your policy schedule is a combined total made up of two separate elements: the compulsory excess your insurer sets, and the voluntary excess you chose when you bought the policy. They are added together for every relevant claim, and the distinction matters because only one of them is within your control.
Compulsory Excess: The Insurer's Fixed Floor
Compulsory excess is set entirely by the insurer. You cannot negotiate it down at the point of purchase, and no comparison site lets you override it. It reflects the insurer's assessment of the risk you present: your driving history, your age, your vehicle's repair costs, and the statistical claims frequency for your profile all feed into the number. Two drivers buying otherwise identical policies from the same insurer for the same car can face different compulsory excess figures if their underlying risk profiles differ.
For a typical driver in their thirties with a clean licence and a mainstream family car, compulsory excess commonly sits somewhere between £100 and £250. Drivers of high-value or performance vehicles, and those with previous claims or convictions, may find compulsory excess running considerably higher, because the insurer is ensuring those policyholders share a meaningful stake in each claim outcome.
Why Insurers Set Compulsory Excess
The logic is straightforward: when you bear some of the cost of a claim, you are less likely to make small or spurious ones. Frequent low-value claims are administratively expensive to handle and they inflate premiums across the market. By making you pay the first portion of any loss, the insurer filters out the noise of minor incidents that drivers could reasonably absorb themselves. The compulsory excess anchors that principle regardless of what voluntary excess you choose on top of it.
Young Driver Compulsory Excess
If you are under 25 - or if a named driver on your policy is under 25 - you will almost certainly see an additional young driver compulsory excess listed in the policy schedule. This sits separately from the standard compulsory excess and typically ranges from £200 to £500 or more, depending on the insurer and the driver's specific age. When a young driver is involved in a claim, all three figures stack: the standard compulsory excess, the supplementary young driver excess, and any voluntary excess chosen for the policy.
It is a common shock for parents who add a teenage child as a named driver, only to discover after an accident that the total excess is four or five times what they expected. Reading the full schedule carefully before you need to claim is always worth the ten minutes it takes.
Voluntary Excess: Your Adjustable Share
Voluntary excess is the additional amount on top of the compulsory excess that you agree to pay in exchange for a lower premium. When you get a quote online, you will usually see a slider or dropdown asking how much voluntary excess you want to add - commonly ranging from £0 to £500, though some insurers offer higher options for drivers seeking a more aggressive premium reduction.
Choosing a higher voluntary excess signals to the insurer that you are confident in your own driving and are unlikely to claim for small incidents. The insurer rewards that confidence with a lower annual premium, because a policyholder who has committed to paying £500 before any payout is statistically far less likely to call about a scratched door panel or a cracked wing mirror than one who has committed to paying nothing.
How Voluntary Excess Affects Your Premium
The relationship between voluntary excess and premium reduction is not linear, and it varies significantly between insurers and risk profiles. As a rough guide, increasing your voluntary excess by £100 can reduce your premium by somewhere between 5% and 15%, though the actual saving depends on how the insurer has priced your risk category and what your base premium already is. Always verify the saving by running quotes at multiple excess levels rather than relying on a rule of thumb.
The proportional saving is generally larger for younger drivers and those with recent claims, because those profiles carry higher base premiums. For a 22-year-old paying £1,800 a year, adding £300 of voluntary excess might save £150 to £250 annually - a sum worth weighing seriously. For a 45-year-old paying £420 a year on a standard hatchback, the same additional voluntary excess might trim only £25 to £60 from the bill, changing the risk calculation considerably.
Do not accept comparison site default settings without checking them. Many sites pre-populate voluntary excess at £0 to generate the most competitive-looking headline price. Confirm what level is actually set before you treat any quote as your working benchmark.
Working Out Your Total Excess
Your total excess for most standard claims is: compulsory excess + voluntary excess. If your policy schedule shows a compulsory excess of £200 and you chose a voluntary excess of £300, your total excess is £500. For every claim that falls within your covered perils, you pay the first £500 before your insurer contributes anything.
Some claim types carry their own separate excess figures. Windscreen repair or replacement, fire and theft, and malicious damage may each state a different excess from the standard at-fault accident figure. These are listed in your policy schedule or within the main policy document, and they are worth locating before you need to call about a cracked screen in a car park at short notice.
What Happens When You Make a Claim?
Understanding the mechanics of an actual claim is where the theory becomes real money. The process and who pays what depends heavily on how fault is allocated and whether the other driver is insured.
At-Fault Claims and Excess Payment
If you caused the accident - or if fault cannot be established and both insurers share the loss - your claim is handled under your own policy. Your insurer arranges or pays for the repairs and you pay your total excess either to the repairer directly or to your insurer, depending on how they have structured the process. Your NCD will typically also be reduced; the standard industry reduction is two years of built-up discount, though the exact impact depends on your insurer and whether you have NCD protection in place.
Some insurers require you to pay the excess upfront at the point of repair, while others deduct it from any settlement payment. Knowing which approach your insurer uses means you will not be caught short when you need to access the money at a moment's notice - after an accident is rarely a calm time to discover your policy terms.
Not-at-Fault Claims: Do You Still Pay Excess?
This is one of the most widely misunderstood areas of UK car insurance. Even when the accident is clearly someone else's fault, many insurers still ask you to pay your total excess upfront, then recover it from the at-fault driver's insurer through a legal process called subrogation. In straightforward cases where liability is admitted quickly, recovery can happen within a few weeks. In disputed cases, it can take months.
The practical implication is that you need to have your total excess available in cash even when you did not cause the incident. Some insurers handle recovery smoothly and return your excess once they have settled with the other side. Others leave policyholders chasing refunds. Your policy wording will state how excess recovery is handled - finding that section before an incident rather than after is worth the effort.
An alternative for not-at-fault claims is to deal directly with the at-fault driver's insurer rather than routing through your own. This approach means you should not have to pay any excess at all, and your own NCD remains untouched. However, it requires the other driver to admit liability and their insurer to co-operate promptly, which does not always happen willingly. If you choose this route, document everything at the scene, never admit fault yourself, and consider seeking independent advice from a solicitor or claims specialist for any loss above a few hundred pounds.
Uninsured Drivers and the Motor Insurers Bureau
If you are hit by an uninsured driver or a driver who leaves the scene, you can make a claim through the Motor Insurers Bureau (MIB) - a UK body funded by the insurance industry that compensates victims of uninsured and untraced drivers. The MIB applies an excess to uninsured driver claims; check the current figure at mib.org.uk directly, as it is subject to periodic review and any figure published here may be out of date by the time you read it.
If you have uninsured driver promise cover - or equivalent wording - on your own comprehensive policy, your insurer may waive your excess for these claims and handle the MIB process on your behalf. This add-on is usually offered at low or no additional cost and is worth confirming you have before you need it.
Excess and Different Types of Cover
Windscreen Claims
Most comprehensive policies include windscreen cover with a separate, usually lower, excess for repair versus full replacement. A chip repair that avoids full replacement commonly carries a nil excess or a nominal amount. A full screen replacement typically attracts a windscreen excess somewhere between £75 and £150, though this varies by insurer - always check your schedule for the exact figure. Crucially, windscreen claims on most policies do not affect your NCD, which means they are often worth claiming even when the cost is only marginally above the windscreen excess.
Third party, fire and theft (TPFT) policies do not include windscreen cover as standard, which is one of the practical trade-offs of opting for a lower level of protection. It is also worth knowing that in recent years some comparison data has shown comprehensive policies priced lower than TPFT for certain driver profiles, so it is always worth quoting both levels rather than assuming TPFT is automatically the budget option.
Fire and Theft Claims
Both comprehensive and TPFT policies cover fire and theft, but the excess applied may differ from your standard accident excess. Your schedule may list a separate fire and theft excess figure. The practical situation after theft is also slightly different: if your car is recovered undamaged, the excess typically does not apply because no repair cost has arisen. If the car is recovered in a damaged condition, or is written off, the excess applies against the settlement value in the normal way.
Excess Protection Insurance: Is It Worth It?
Excess protection - sometimes sold as excess reimbursement insurance or excess waiver cover - is a product that reimburses you for the excess you pay after a successful claim. It is available both as an add-on bolt-on from your main insurer and as a standalone annual policy from specialist brokers that covers all your vehicles under one umbrella. Prices and terms vary between providers, so verify current costs and cover details with providers directly before committing.
The product appeals particularly to drivers who have chosen a high voluntary excess to reduce their main premium. If you carry a £500 voluntary excess to secure a lower base rate, excess protection at a modest annual cost effectively caps your net out-of-pocket exposure per claim year at that protection premium. The arithmetic can work well for drivers with occasional at-fault claims every three or four years.
However, excess protection is not universally good value. Before buying, examine the following questions carefully:
- Does the cover apply to all claim types on your policy, or only at-fault ones? Some policies exclude not-at-fault claims on the basis that you should recover your excess from the other driver's insurer.
- Is there a cap on the number of reimbursements per policy year? Many products limit you to one or two successful claims annually.
- Does the excess protection product itself carry an excess? Some do, which undermines the core purpose of the cover.
- Does it extend to all named drivers on your policy, or only to the main policyholder?
- How quickly is reimbursement processed after you submit a claim? Some pay within days; others take several weeks.
Read the policy document rather than just the marketing summary. Excess protection is a simple product in principle but the detail determines whether it genuinely delivers on its promise for your specific situation.
How to Choose the Right Voluntary Excess
The right voluntary excess is different for every driver, because it is really a question about personal financial resilience and realistic claims history rather than a universal rule. There is no single correct number, but there is a clear framework that helps most people arrive at a defensible decision they will not regret.
The Liquidity Test
Ask yourself honestly: if I had to produce a cheque for my total excess - compulsory plus voluntary - within two weeks of an accident, could I do so without borrowing or causing serious financial stress? If the answer is no, your voluntary excess is set too high. Excess is not a theoretical figure; it is money you must produce promptly after something bad has already happened. Setting voluntary excess at £500 because the premium saving looks attractive is a false economy if you do not have £500 accessible at short notice and would need to delay repairs or use a credit card at cost.
If you maintain an emergency fund that comfortably covers your total excess, a higher voluntary excess can be entirely rational. If you are managing cash flow month to month, a lower excess at the cost of a higher annual premium limits your maximum exposure at the worst possible time. Financial resilience, not just premium optimisation, should be the deciding factor.
When a Higher Excess Makes Sense
- You have a solid, accessible emergency fund and the total excess would genuinely be available quickly if needed.
- Your vehicle is modest in value. A car worth £5,000 with a £500 total excess still leaves you with meaningful coverage for serious damage. A car worth £1,500 with the same excess means every borderline claim is going to see your insurer contributing very little.
- You are an experienced driver with several claim-free years behind you and a base premium already low enough that the proportional saving from higher excess is genuinely worthwhile.
- You drive relatively rarely and your realistic annual risk of an at-fault claim is low.
When to Keep Voluntary Excess Low or at Zero
- You are a young driver already facing a high compulsory excess and a supplementary young driver excess. Stacking voluntary excess on top can push your total to a figure that makes comprehensive claims impractical for anything short of a write-off.
- Your car is high-value and repair costs are steep. A parking incident on a modern car equipped with cameras, sensors and aluminium body panels can easily generate a £1,500 to £2,500 repair bill. Keeping your excess at a manageable level means your cover remains useful for the incidents most likely to happen.
- You have a history of making claims, regardless of fault. If you live in a busy urban area, park on a congested street, or simply know from experience that incidents tend to find you, keeping your excess low means you can actually use the insurance you are paying for.
- Your cash reserves do not comfortably cover your planned total excess figure.
Common Excess Mistakes That Cost UK Drivers Money
Forgetting to account for all excess components when setting voluntary excess. A driver who sees £150 compulsory excess and adds £350 voluntary excess may not realise that a young named driver on the policy adds another £350 supplementary excess, pushing their actual exposure to £850 for any claim involving that driver. Read every line of the schedule before setting your voluntary figure.
Claiming for amounts barely above the total excess. If your total excess is £400 and damage costs £460, the claim nets you £60 but may remove two years of NCD. The premium impact of losing that NCD in the following renewal year can far exceed what you recovered. Small claims where the payout is less than roughly twice the annual NCD value are usually better absorbed without formal notification.
Assuming not-at-fault claims require no excess payment at the repair stage. As described above, many insurers collect the excess upfront regardless of fault allocation, then recover it from the other party's insurer. Not having that cash ready delays repairs and adds stress at an already difficult moment.
Never revisiting your excess level at renewal. If your financial position has improved since you originally set your policy - you built an emergency fund, cleared debts, or your premium has fallen naturally as you aged - your optimal excess level may have changed too. Review it actively at every renewal rather than letting it roll forward unchanged.
Treating comparison site default excess as your baseline without testing alternatives. Many comparison platforms pre-set voluntary excess at £0 to generate the most competitive headline premium. Running quotes at two or three different voluntary excess levels often reveals that the premium reduction curve is non-linear - the jump from £0 to £250 voluntary excess can save more than the jump from £250 to £500, or the opposite, depending on how a given insurer has priced that risk band. Two minutes of testing can meaningfully improve your decision.
Assuming the same excess strategy works across all your insurance products. Car insurance excess and home insurance excess work on the same principle but the claim dynamics, realistic claim values, and premium sensitivity differ significantly. Never transfer a car insurance excess decision directly onto a home or travel policy without running the numbers fresh.
Frequently Asked Questions
Can I change my voluntary excess after I have bought the policy?
Most insurers allow mid-term adjustments, but changing your voluntary excess triggers a mid-term adjustment (MTA) fee and a full recalculation of your premium. The new excess applies only to incidents occurring after the change date. Ask your insurer about the MTA charge before requesting the change, as the administrative fee can sometimes cancel out the premium saving if you are late into the policy term and would be better off waiting for renewal.
Does paying excess affect my no-claims discount?
Paying your excess does not by itself affect your NCD - what matters is whether you made a fault claim. In an at-fault claim, you pay your excess and your NCD is reduced. In a successfully settled not-at-fault claim, your excess should eventually be recovered from the other party's insurer and your NCD should be protected. Windscreen chip and replacement claims generally do not affect NCD on most comprehensive policies, though always confirm this with your insurer before proceeding.
What happens if my repair cost is less than my total excess?
Your insurer pays nothing and you cover the full repair cost yourself. However, you may still be required to notify your insurer of the incident, particularly when a third party is involved. Failing to notify can be treated as a breach of your policy conditions and could affect cover in the future. Ask your insurer explicitly about their notification requirements before deciding not to make a formal claim - the notification obligation and the claim itself are two separate things.
If I have excess protection cover, do I still pay the excess at the garage?
Yes, in almost all cases. Excess protection is a reimbursement product: you pay your excess at the time of the repair in the normal way, then submit proof of payment to your excess protection insurer and receive a refund afterward. It does not allow you to bypass paying the excess upfront, so you still need the cash available at the point of repair. Reimbursement timescales vary by provider - check this before you rely on the cover for cash flow purposes.
Can my insurer change my compulsory excess at renewal?
Yes. Compulsory excess is reassessed at each renewal alongside all other pricing factors. A recent claim, a newly added young named driver, or a change of vehicle can all push it higher. It can also fall if your risk profile improves - for example, as a young driver moves past 25. Always read the full renewal schedule rather than just the headline premium figure, because a lower premium that comes with a higher compulsory excess may not represent the saving it appears to be at first glance.
Is there any claim type where I pay no excess at all?
Windscreen chip repair (as opposed to full replacement) often carries a nil excess on comprehensive policies. Some insurers also waive excess when repairs are handled through their approved repairer network as part of a managed repair programme, though this depends on the specific insurer and product. Breakdown callouts are not insurance claims and carry no excess. Always check your own policy schedule rather than assuming a general rule applies, because excess terms vary considerably between insurers, product tiers, and claim types.
Review Your Excess Before Your Next Renewal
Choosing the right excess level is one of the most practical steps you can take to make sure your car insurance policy actually works for you when you need it - not just on the comparison site where you bought it. If you have questions about how excess interacts with your specific level of cover, whether your voluntary excess is still set at the right level for your current financial situation, or how to compare policies where the excess and premium trade-offs differ in ways that are not immediately obvious, our contact page is the place to start a conversation. Getting the details right costs nothing and can make a significant difference when a claim becomes real.