UK Insurance Excess: Compulsory vs. Voluntary Excess Explained
Learn how policy excess works during an insurance claim, how compulsory and voluntary components combine, and how to choose the right excess balance.
An insurance excess is the agreed sum of money that you, as the policyholder, contribute towards any claim before your insurer pays the remainder. In the UK, your total policy excess is almost always comprised of two distinct elements: compulsory excess and voluntary excess.
1. Compulsory Excess vs. Voluntary Excess
- Compulsory Excess: A fixed minimum amount set non-negotiably by the insurer. It is determined by underwriting factors such as your property location, flood risk zone, building age, claims history, or the specific type of claim being filed.
- Voluntary Excess: An optional amount that you choose to add on top of the compulsory baseline when setting up your policy (typically £0, £100, £250, or £500).
Total Claim Deduction: Whenever you make a valid claim, the insurer deducts the combined total (Compulsory Excess + Voluntary Excess) from the claim settlement amount.
2. Illustrative Claim Calculation Examples
Suppose a burst pipe causes £2,000 worth of damage to your kitchen flooring and cabinets. Your policy has a £150 compulsory excess and you selected a £200 voluntary excess:
- Total Gross Repair Cost: £2,000
- Total Excess Deducted (£150 + £200): £350
- Net Payout from Insurer: £1,650
3. Specific Mandatory Excesses in the UK
Certain high-risk perils have standardized minimum compulsory excess thresholds across UK insurers:
- Subsidence, Landslip & Heave: Standard UK home policies apply a mandatory £1,000 excess for ground movement claims, regardless of your voluntary excess setting.
- Escape of Water: Because internal leaks represent the most costly volume claims in the UK, insurers often set a compulsory water damage excess between £250 and £500.
- Accidental Damage: If you add optional accidental damage cover to contents insurance or buildings insurance, a separate specific excess (e.g. £50 or £100) may apply per incident.
4. The Relationship Between Excess and Monthly Premium
There is an inverse relationship between your voluntary excess and your insurance premium:
- Higher Voluntary Excess (£250–£500): Reduces your regular monthly or annual premium because you take on a larger share of the financial risk for minor incidents.
- Lower Voluntary Excess (£0–£100): Increases your premium, but ensures minimal out-of-pocket costs if you ever need to claim.
Essential Guideline: Never set your voluntary excess higher than the liquid emergency savings you can afford to pay on short notice. If you select a £500 voluntary excess on top of a £250 compulsory excess, you must be prepared to pay £750 immediately if an incident occurs.
5. Single Excess on Combined Policies
If you have a combined buildings and contents policy, most modern UK insurers only charge a single excess if an insured event damages both the structure and your personal belongings simultaneously. If you held separate policies with different providers, you would have to pay two separate excesses.