Key Takeaway: Every UK insurance policy excess has two parts: the compulsory excess (set by your insurer based on risk factors you cannot control) and the voluntary excess (an optional amount you choose to add). Your total excess is the sum of both. Increasing your voluntary excess typically reduces your premium, but you will pay more out of pocket when you claim.

What Is Insurance Excess?

An insurance excess is the amount you pay towards a claim before your insurer covers the rest. If you claim £2,000 in damage and your total excess is £500, you pay the first £500 and the insurer pays the remaining £1,500. Understanding how excess works is essential to choosing the right cover level, as covered in foundational texts such as Principles of Finance.

All UK insurance policies that involve claims, including motor, home buildings, home contents, and landlord cover, use an excess structure to share risk between you and the insurer.

Compulsory Excess

The compulsory excess is the minimum amount your insurer requires you to pay on a claim. You cannot reduce it or remove it. Insurers set this based on risk factors:

  • Age and experience (motor cover): younger or newly qualified drivers typically face higher compulsory excess because claims data shows they present greater risk.
  • Type of cover: certain policy types or add-ons carry a standard compulsory excess.
  • Claims history: some insurers apply a higher compulsory excess if you have made previous claims.
  • Vehicle or property characteristics: high-value vehicles, properties in flood zones, or specialist cover may trigger a higher compulsory excess.

According to the Association of British Insurers, the compulsory excess reflects the insurer’s assessment of the likelihood and cost of a claim (ABI, 2026). This amount is fixed in your policy schedule and applies automatically.

Voluntary Excess

The voluntary excess is an additional amount you choose to add on top of the compulsory excess. It is optional. You select the level (commonly £0, £100, £250, £500, or £1,000) when you take out or renew the policy.

Choosing a higher voluntary excess reduces your premium because you are agreeing to bear more of the cost if you claim. The insurer’s potential payout decreases, so they charge you less upfront.

How They Work Together

Your total excess is always the compulsory excess plus the voluntary excess. For example:

  • Compulsory excess: £300
  • Voluntary excess: £250
  • Total excess: £550

If you make a claim for £1,200, you pay £550 and the insurer pays £650. If the claim is less than your total excess, the insurer pays nothing and you bear the full cost.

Why Excess Matters

Impact on Premiums

A higher voluntary excess reduces your premium. Insurers offer this trade-off because you are accepting more financial responsibility. MoneyHelper guidance suggests comparing quotes at different voluntary excess levels to see the premium saving (MoneyHelper, 2026).

The saving is not always proportional. Adding £500 to your voluntary excess might reduce your premium by £80, but adding another £500 might only save an additional £30. The relationship flattens at higher levels.

Impact on Claims

The total excess is your out-of-pocket cost every time you claim. A high excess can make small claims uneconomical. If your excess is £750 and you have £600 of damage, claiming costs you more than paying directly. Many policyholders with high excess choose not to claim for minor losses to preserve their no-claims bonus (NCB) and avoid an increased premium at renewal.

Read also: How to Choose Between Comprehensive and Third Party Car Insurance in the UK

What to Choose

Consider Your Financial Position

Choose a voluntary excess you can afford to pay immediately if you need to claim. The Financial Conduct Authority consumer guidance reminds policyholders that choosing a high excess to save on premium only works if you can meet that cost when required (FCA, 2026).

If you do not have savings or access to credit, a lower voluntary excess (even £0) may be the safer choice despite the higher premium.

Assess Your Claim Likelihood

Estimate how likely you are to claim:

  • Low risk: If you drive infrequently, park in a secure location, have a strong no-claims bonus, and avoid high-risk routes, a higher voluntary excess may suit you. You keep the premium saving and are unlikely to need to claim.
  • Higher risk: If you drive daily in heavy traffic, park on the street, or have previously made claims, a lower voluntary excess protects you against frequent out-of-pocket costs.

The same logic applies to home insurance. Properties in areas with higher burglary or flood risk may justify a lower voluntary excess.

Weigh Premium Savings Against Exposure

Calculate the annual premium difference between a low and high voluntary excess, then compare it to the additional amount you would pay on a claim. If increasing your voluntary excess by £500 saves you £60 a year, it takes more than eight years of no claims to recover the cost of one incident.

Review at Renewal

Your circumstances change. A voluntary excess that suited you when you were a new driver may be too high once you have built experience and savings. Review your voluntary excess annually when you renew, and adjust it to match your current financial situation and risk profile.

UK-Specific Context

Excess structures are standard across UK motor, home, and contents policies. Certain categories carry additional considerations:

  • Young or newly qualified drivers: Insurers often impose a higher compulsory excess (£500 to £1,000 or more) for drivers under 25 or those who passed their test in the last two years. Adding a high voluntary excess on top can push the total excess beyond £1,500, making any claim expensive.
  • Telematics policies: Black box policies for young drivers may offer lower compulsory excess if you demonstrate safe driving, rewarding behaviour with reduced exposure.
  • Home contents (tenant cover): Landlords sometimes require tenants to hold contents insurance. Check whether the landlord’s buildings policy excess affects your claim, as some loss scenarios involve both.

Conclusion

Compulsory excess is non-negotiable and set by your insurer based on risk. Voluntary excess is your choice and directly affects your premium. Your total excess, the sum of both, is what you pay when you claim.

Choose a voluntary excess you can afford and that reflects your likelihood of claiming. A high excess suits low-risk policyholders with savings, while a low excess protects those who cannot easily meet a large upfront cost. Review your choice at each renewal as your circumstances and risk profile evolve.

Financial Disclaimer: This article provides general information only and is not regulated financial advice. We are not authorised by the Financial Conduct Authority. Cover, exclusions, compulsory excess, and voluntary excess options vary by insurer and by policy. Read the policy wording, the key facts document, and your policy schedule, and confirm details with an FCA-authorised insurance adviser or broker for your personal situation before deciding.