Car Insurance Excess in the Uk Explained: What It Is and How to Choose the Right Amount

Ask most drivers what their car insurance excess actually is, and you will often be met with a shrug — yet this single figure can shape both the price you pay each year and the state of your finances after an accident. It is one of those quiet, technical details that feels like it belongs in the small print, until the moment it becomes the only thing standing between you and a sizeable repair bill. In this guide, we will break down exactly what car insurance excess means in the UK, explore how voluntary and compulsory excess work together, and give you a practical framework for choosing the right amount for your own circumstances.

We will also look at the situations where your excess should be refunded, the myths that lead people into expensive mistakes, and the guidance that consumer champions like Martin Lewis have shared over the years. Our goal is simple: to make car insurance excess one of the least stressful parts of your motoring life, rather than the source of a nasty surprise.

What Is a Car Insurance Excess in the UK?

A car insurance excess is the agreed amount you pay towards any claim before your insurer contributes a penny. If the total cost of repairing your car is £1,200 and your policy has a £300 excess, you cover the first £300 and your insurer pays the remaining £900. The same principle applies to theft, fire damage and, in many cases, damage to other vehicles — although the excess application can vary depending on the type of claim.

Why do insurers use excesses at all? The concept is simple: when you share some of the financial risk, the insurer can charge you less. Excesses discourage the kind of small, avoidable claims that are disproportionately expensive for insurers to process, and they encourage drivers to treat their cars a little more carefully. The result is that nearly every UK car insurance policy carries an excess, and understanding how it is calculated is the key to comparing quotes honestly.

It is also worth noting that the word “excess” is a distinctly UK insurance term. In the United States, for example, the same idea is called a “deductible,” while in Australia you will hear it described as an “excess” too. Wherever you are in the world, the fundamental logic is identical: you carry a slice of the risk, and your insurer carries the rest.

Compulsory vs Voluntary Excess: The Two Types

Every UK car insurance policy will typically include two types of excess, and they are added together to create your total excess. Understanding the difference between them is essential because one is fixed by your insurer, while the other is a choice you can use to control your premium.

Aspect	Compulsory Excess	Voluntary Excess
Who sets it	The insurer, based on risk factors such as your age, driving history, car model and where you live.	You, at the point of purchase, usually between £0 and £1,000.
Can you change it?	No, it is fixed to the policy and often differs for specific risks like theft.	Yes, you can choose a higher amount to lower your premium, or a lower amount for more protection.
When is it paid?	On an accepted claim, before your insurer pays out.	On an accepted claim, added on top of the compulsory excess.
Typical amount	£100 to £300 for most drivers, but far higher for young or high-risk drivers.	£0 to £500 is most common; some drivers go as high as £750.

Your total excess is the sum of both amounts. If your insurer sets a compulsory excess of £200 and you choose a voluntary excess of £300, your total excess is £500. This is the figure you will need to remember if you ever make a claim.

The Compulsory Excess: Why It Exists

The compulsory excess is set by the insurer as part of its underwriting process. A young driver, a driver with penalty points, or someone insuring a high-performance car will face a higher compulsory excess because the statistical risk of a claim is greater. Insurers also frequently apply a separate, higher compulsory excess for theft claims, meaning you could pay more if your car is stolen than if you have an accident.

The Voluntary Excess: Your Negotiating Tool

The voluntary excess is where you have genuine control. By agreeing to pay a larger amount towards any claim, you reduce the risk held by the insurer, and they reward you with a lower premium. For those looking to reduce their monthly motoring costs, raising the voluntary excess is one of the quickest ways to see an immediate difference on comparison sites.

The key is not to confuse “cheaper now” with “better value later.” Martin Lewis and his team at MoneySavingExpert have long advised that a voluntary excess should only be set at a level you could comfortably afford to pay from savings in a single, unexpected payment. We will come back to that rule of thumb in more detail shortly.

How Your Car Insurance Excess Works in Practice

Excesses are only deducted when a claim is settled, but the way they play out in different scenarios can be surprisingly complicated. Let us walk through a few realistic examples so you can see exactly where your money goes.

Example One: A Minor Repair After an At-Fault Accident

Suppose you reverse into a bollard and damage your rear bumper. The repair bill comes to £850, and your total excess is £400. Your insurer accepts the claim, deducts your £400 excess, and pays the garage £450. You also report the accident to your insurer, which means your no-claims discount will typically be affected — unless you have protected it.

Example Two: Damage Below the Value of Your Excess

Now imagine the same accident causes only £250 of damage, and your excess is £400. Your insurer will not pay anything because the claim value is below the excess. You could still notify them of the incident, but it would be illogical to make a formal claim, because you would receive no payout and would still lose your no-claims discount. In this situation, you would be better off paying for the repair yourself and never informing your insurer.

Example Three: Theft of Your Vehicle

If your car is stolen and you have a comprehensive policy, your insurer will cover the value of the vehicle after deducting your total excess. Since theft is such a significant risk, many insurers include a higher compulsory excess for theft claims specifically. So, while your total excess might be £300 for an accident, it could be £500 or more if the claim arises from theft.

Example Four: Windscreen Damage

Windscreen chips and cracks are often treated differently. Many comprehensive policies include glass cover with a reduced excess — sometimes as low as £50 — while some insurers waive the excess entirely for chip repairs to encourage you to fix the problem before it turns into a full windscreen replacement. Always check the wording of your policy, because windscreen excesses are not always the same as your standard excess.

Who Pays the Excess When the Accident Isn’t Your Fault?

This is arguably the most misunderstood area of car insurance excess in the UK, so we want to be crystal clear. The short answer is that you may have to pay your excess upfront even if you are completely blameless, but you can often reclaim it later. The practical reality depends on how liability is established and how co-operative the other driver’s insurer is.

If another driver crashes into your parked car and leaves their details, you have two options. You can claim through your own insurer, pay your excess, and let them try to recover it from the third party’s insurer; or, if you have the other driver’s policy details, you can claim directly against their insurer, in which case no excess applies at all.

When the Third-Party Insurer Admits Fault

The Competition and Markets Authority introduced important rules in 2015 that mean insurers can no longer use “knock-for-knock” agreements to leave innocent drivers out of pocket. In practice, if the other driver’s insurer accepts full liability, they are responsible for your losses — and that includes your excess. Your insurer will normally arrange to recover your excess as part of the claim, and you should receive it back in full.

When Liability Is Disputed or Split

If the other driver disputes liability, or the insurers agree that both parties share responsibility, the situation becomes more complicated. With a 50/50 liability split, for example, you may only recover half of your excess, because your insurer recovers a proportionate share of your losses from the other side. The Financial Ombudsman Service regularly sees complaints about liability disputes, and their guidance is simple: keep evidence, take photos, and never accept liability at the scene of an accident.

When the Other Driver Is Uninsured or Untraced

If you are hit by a driver without insurance, or by someone who drives off, the Motor Insurers’ Bureau (MIB) exists to compensate innocent victims. If you have comprehensive cover, your own insurer will handle the claim, and you may need to pay your excess while they pursue recovery. If you only have third-party cover, you can claim directly against the MIB, and the excess concept does not apply because you are not claiming under your own policy.

The important point is that an accident which is clearly not your fault should not, in theory, cost you your excess in the long run. In reality, getting that money back can take months, which is why the size of your excess still matters even for the safest of drivers.

Choosing the Right Car Insurance Excess: Key Considerations

There is no single “right” excess for everyone, but there is a right excess for your financial situation, driving habits and appetite for risk. Here are the considerations we suggest working through before you set your voluntary excess.

Start With What You Can Afford

The most widely cited rule, echoed by consumer champion Martin Lewis and most independent finance experts, is that your total excess should be an amount you could pay out of savings without panic. If paying £500 would push you into debt or force you to sacrifice essential bills, then a £500 voluntary excess is too high, no matter how much it saves you on your premium.

Use the Break-Even Formula

To understand whether a higher excess is financially sensible, calculate how many claim-free years you would need to offset the extra excess you would pay in a claim. If raising your voluntary excess from £250 to £500 saves you £60 a year, you are saving £60 per claim-free year, but you would pay £250 extra when you eventually claim. That means you would need more than four years without a claim just to break even.

Consider Your Claim History

Drivers with many years of no-claims protection are statistically less likely to claim, which makes a higher voluntary excess more attractive. Conversely, if you have made two or three claims in the past few years, or you frequently drive in congested areas where small bumps are common, a lower excess might be the wiser, calmer choice.

Think About the Age and Value of Your Car

If your car is worth only £1,500, there is little point accepting a £750 excess, because a modest accident could write the vehicle off and leave you with almost nothing. On an older car, many drivers choose a higher excess to keep costs down, on the basis that the insurer’s payout would be modest anyway. For a newer or more valuable car, protecting your investment with a lower excess often makes better sense.

Factor In Your Parking and Driving Environment

Do you park on a busy street, or in a locked garage? Do you drive 500 miles a week or 5,000 miles a year? The more exposure your car has to risk — other drivers, theft, vandalism and weather events — the greater the chance that you will need to claim, and the more painful a high excess will become.

The Pros and Cons of Raising Your Voluntary Excess

To make things clearer, here is an honest look at the advantages and disadvantages of setting a higher voluntary excess. We are not telling you which side of the fence to sit on; we are simply laying out the trade-off so the decision is yours.

Pros of a Higher Voluntary Excess	Cons of a Higher Voluntary Excess
Lower annual premium, often by 10% to 20% compared to a zero voluntary excess.	A larger upfront payment if you need to make a claim.
May make an otherwise expensive policy affordable.	You might avoid claiming for legitimate damage just because the cost is close to your excess.
Encourages careful driving and reduces minor claims.	Recovery of your excess after a not-at-fault accident can be slow and stressful.
Can unlock more competitive quotes on comparison sites.	The savings diminish significantly beyond £500, so the benefit shrinks.
Gives you control over the cost of your insurance.	If your financial circumstances change, you cannot easily adjust the excess mid-policy.

As you can see, raising your voluntary excess is not a decision to be taken lightly. It is a calculated bet that you will not need to claim, or that you will be able to manage when you do. For many drivers, a total excess of £250 to £500 strikes the most practical balance between manageable monthly costs and avoidable financial pain.

Common Myths About Car Insurance Excess, Explained

Misinformation about car insurance excess is everywhere, and it often leads drivers to make decisions they later regret. Let us dismantle the most common myths one by one.

Myth One: “If the Accident Isn’t My Fault, I Don’t Pay the Excess”

This is only half true. You may have to pay your excess upfront, and it is only refunded once your insurer successfully recovers it from the third party’s insurer. If liability is disputed, you could be waiting a long time for your money.

Myth Two: “A Voluntary Excess Doesn’t Apply to Not-At-Fault Claims”

It does. If you claim under your own policy — even in a not-at-fault accident — your total excess is deducted from your payout. The refund comes later through recovery, not through a waiver at the start of the claim.

Myth Three: “The Higher the Excess, the Bigger the Savings”

There is a point of diminishing returns. Increasing your voluntary excess from £0 to £250 can meaningfully reduce your premium, but going from £500 to £1,000 rarely halves your premium again. The risk you take is not proportionally rewarded.

Myth Four: “Excess Only Applies to Accidents”

No. The excess applies to theft, fire, vandalism, and any other insured peril under your policy. As we mentioned earlier, the theft excess is often higher than the accident excess, so this myth can be an expensive one to believe.

Myth Five: “Making a Small Claim Is Worth It Because I’ve Paid My Excess”

This is backwards. If the repair cost is only slightly above your excess, the claim will wipe out a chunk of your no-claims discount, and your premium could rise for years. The long-term cost of a claim often far exceeds the repair bill itself.

Does a Higher Excess Always Mean Cheaper Car Insurance?

In short, no — not always. While raising your voluntary excess will often reduce your premium, the relationship is not perfectly linear, and different insurers price excess differently. Some insurers build the risk of a higher excess into their pricing, meaning the savings plateau at a certain level. Others may cap the voluntary excess they accept.

When you use a comparison site like Compare the Market, Confused.com or Go.Compare, you will often see a feature that lets you compare “apples to apples.” This is where you set the same voluntary excess across all quotes before comparing them, which prevents one insurer from looking artificially cheap because they have assumed a £750 voluntary excess while another has assumed £250. Always compare like-for-like, and always read the summary of cover before you buy.

It is also worth remembering that the compulsory excess is not negotiable. A quote that looks dramatically cheaper than the competition may simply carry a far higher compulsory excess, which you cannot change. The cheapest quote on paper is not always the cheapest quote in the event of a claim.

Car Insurance Excess for Over-50s, Young Drivers and High-Risk Motorists

Your age and risk profile have a significant influence on both the compulsory excess you are offered and the voluntary excess you should consider. Let us look at how this plays out for different groups.

Over-50s Drivers

Statistically, drivers aged 50 to 69 are among the safest groups on UK roads, which is why the over-50s are usually offered some of the lowest premiums. For those looking to stretch their retirement budget, a modest voluntary excess of £250 to £500 can deliver excellent value without exposing them to unmanageable costs. However, we would always advise against setting an excess higher than your emergency fund can comfortably cover, particularly if you are on a fixed income and a sudden £750 payment would cause genuine difficulty. Insurers also offer specific “over 50” policies with features that can include lower excesses, so it is always worth comparing specialist providers against the mainstream market.

Young Drivers

Young drivers face brutal premiums, often because insurers impose compulsory excesses of £500 or more on top of an age-banded excess. Adding a parent or older named driver to the policy can reduce the premium and sometimes the compulsory excess, but this must be done honestly — the older driver must genuinely be the main user if the policy reflects that. For young drivers, keeping the voluntary excess low is usually wise, because the compulsory excess is already so high that adding more on top creates a perilous total figure.

High-Risk Drivers

If you have convictions, a history of claims, or a modified vehicle, you are likely to face higher compulsory excesses. In this situation, raising your voluntary excess might be the only way to bring your premium down to an affordable level. Just be honest with yourself about the risk: the very factors that make your premium high also make a future claim more likely, so a sky-high excess could turn a recovery into a financial crisis.

Excess, Car Finance and Leased Vehicles: What to Watch For

If your car is on a finance agreement, a personal contract purchase (PCP) plan, or a lease, you may not be free to choose any excess you like. Finance companies often impose a maximum total excess — commonly around £500 — because they want their asset protected if you are in an accident. Choosing a voluntary excess that pushes your total above the finance company’s limit can invalidate the terms of your agreement.

Check your finance contract before you choose your voluntary excess, and remember that gap insurance can protect you against the depreciation gap if your car is written off. When you make a claim on a leased vehicle, the finance company will be notified, and the excess deduction is taken from the settlement you would otherwise receive.

When Is the Excess Waived? Exceptions and Add-Ons

There are a few situations where you may not have to pay your excess at all, and some where you can buy extra cover to protect yourself.

Windscreen and Glass Claims

Many UK policies waive the excess entirely for windscreen chip repairs, or apply a reduced excess for windscreen replacement. This is a good example of insurers encouraging drivers to maintain their vehicles safely.

Courtesy Cars

If you are provided with a courtesy car through your insurance, and it is damaged in an accident that is not your fault, the liability for that damage usually falls on the at-fault driver’s insurer. However, if the courtesy car is damaged while you are at fault, your policy excess will typically apply. Some policies extend the same excess to courtesy vehicles, while others waive it, so check the wording.

Excess Protection Insurance

Many insurers and comparison sites offer an “excess protection” or “excess waivered” add-on for a small additional premium, often £20 to £40 per year. In exchange, the insurer refunds your excess if you make a claim, up to a specified limit. This can provide genuine peace of mind for drivers who want a high excess to keep their premium down but do not want to suffer a large financial hit in a claim. Just read the exclusions carefully, because some policies only cover accident claims and exclude theft or fire.

Legal Expenses Cover

Legal expenses cover, often added for around £10 to £30 a year, can help you recover your excess from an at-fault third-party insurer by funding legal action if they refuse to pay. For innocent drivers facing a disputed liability, this cover can be the difference between recovering your excess and walking away out of pocket.

Practical Tips for Choosing the Right Excess Amount

We have covered a great deal of ground, so let us bring everything together into a simple, step-by-step approach you can use the next time you renew your car insurance.

1. Decide your maximum acceptable total excess first. Look at your savings, your monthly budget and your comfort zone, and write down the highest total excess you could pay without real distress.

2. Get quotes at different voluntary excess levels. Use a comparison site and run the same policy details with voluntary excesses of £0, £250, £500 and £750. Note how much you save at each step.

3. Calculate your break-even point. For each increase, divide the extra excess by the annual saving. If it takes more than three or four years of claim-free driving to break even, the higher excess is rarely worth it.

4. Make sure the compulsory excess is visible. Some quotes bury the compulsory excess in the small print. If a quote looks unfairly cheap, check whether the compulsory excess is unusually high.

5. Check your finance agreement. If your car is leased or on a PCP, confirm the maximum total excess permitted before you set your voluntary excess.

6. Consider excess protection as a compromise. If you like the idea of a lower premium but fear the cost of a claim, an excess protection add-on can give you the best of both worlds.

7. Put the excess aside in savings. If you choose a £500 total excess, create a separate savings pot of £500 labelled “car insurance claim.” That way, the money is there when you need it, and you will never be caught off guard.

Car Insurance Excess FAQs

Do I have to pay the excess if the accident is not my fault?

You may have to pay your excess to get your claim moving, but if the third party’s insurer accepts full liability, they are responsible for your losses, including your excess. Your insurer will normally seek to recover it on your behalf, although it can take several weeks or months.

Can I claim my excess back from the other driver?

In most cases, your excess is reclaimed through the insurance process rather than directly from the driver. If the third-party insurer disputes liability, your legal expenses cover or the Financial Ombudsman Service may help resolve the dispute.

Does a higher excess affect my no-claims discount?

No. Your excess and your no-claims discount are separate parts of your policy. However, if you make a claim, your no-claims discount will normally be affected regardless of the size of your excess.

Should I increase my excess to get cheap car insurance?

Only if you can comfortably afford to pay the total excess from savings. As a general rule of thumb, a total excess between £250 and £500 offers a sensible balance for most drivers. Above £750, the savings usually diminish significantly.

Why is my excess so high?

Your excess is calculated from risk factors including your age, driving history, the make and model of your car, your home address and your annual mileage. Young drivers, drivers with convictions and owners of high-performance cars typically face the highest excesses.

Can I change my excess after buying a policy?

You can usually change your voluntary excess mid-policy, but it will trigger an adjustment to your premium, and you may be charged an admin fee for the change. Your compulsory excess is set by the insurer and cannot normally be altered.

What happens if I never claim?

If you never claim, your excess never matters. You have effectively paid a little extra to your insurer in exchange for lower premiums, which is a good trade for safe drivers who rarely make claims.

Final Thoughts: Finding the Balance for Peace of Mind

Car insurance excess is not a punishment or a hidden fee; it is a trade-off between the premium you pay and the risk you carry yourself. The drivers who get this balance right are the ones who set their voluntary excess with clear eyes, understand exactly what they will pay in a claim, and never find themselves choosing between a repair bill and their household budget.

We want you to approach your renewal with confidence. Use the break-even formula, check your finance agreement, read the policy wording, and remember the advice of consumer champions like Martin Lewis: only agree to an excess you could pay without panic. A car insurance policy is supposed to give you security, not create a new worry — and with the right excess in place, you can drive knowing that whichever side of an accident you land on, your finances will stay firmly under your control.