Pet Insurance Excess Explained: Fixed vs Percentage — Which Costs You More?
Last Updated: March, 2026
A pet insurance excess is the specific amount of money a policyholder pays towards a veterinary bill before the insurance provider covers the remaining balance. Fixed excesses involve a set monetary figure per condition, while percentage excesses require the owner to pay a defined proportion of the remaining treatment costs.
Estimated Reading Time: 8 minutes
Key Takeaways
- A fixed excess is a set monetary amount paid per condition or per year, providing absolute cost predictability for the policyholder.
- A percentage excess, or co-payment, requires the owner to pay a defined proportion of the remaining bill, scaling upward with expensive veterinary treatments.
- Insurers typically apply percentage excesses automatically to older pets, usually starting at age five, six, or eight depending on the specific breed.
- Increasing the voluntary excess directly reduces the monthly premium price but increases the out-of-pocket cost during a medical claim.
What Is Pet Insurance Excess In The UK?
A pet insurance excess represents the specific out-of-pocket financial contribution a policyholder pays towards a veterinary invoice before the insurance provider settles the remaining balance. UK insurance companies utilise two primary excess structures to manage financial liability: a fixed monetary deduction and a percentage-based co-payment. A fixed excess charges a static amount, typically ranging from £60 to £150 in 2026, per condition or per policy year. A percentage excess requires the pet owner to pay a defined proportion, usually 10% to 25%, of the treatment costs remaining after the fixed fee deduction.
Understanding how these structures interact directly affects a pet owner’s total veterinary expenses. Complex surgical interventions, such as cruciate ligament repairs, routinely exceed £3,500 in 2026. A fixed excess provides absolute cost predictability during these expensive medical emergencies, capping the owner’s financial responsibility. Percentage excesses scale upward alongside the total invoice, exposing policyholders to higher immediate costs. Insurance providers systematically move older animals onto these co-payment structures to mitigate the statistical risk of chronic illness, usually applying these terms automatically when a dog or cat reaches five to eight years of age.
Selecting the correct excess structure requires balancing immediate premium savings against future cash reserves. An inverse correlation dictates that raising a voluntary excess lowers the monthly premium price but increases the out-of-pocket requirement during a claim. The following sections detail exactly how providers calculate these deductions, the specific age thresholds that trigger co-payments, and the precise financial difference between fixed and percentage structures during a high-cost veterinary event.
How Compulsory And Voluntary Excesses Work
Compulsory excess is the non-negotiable minimum amount set by the insurance provider to initiate a claim. The ABI (Association of British Insurers) reports that most UK pet policies feature a compulsory excess ranging from £60 to £150 in 2026. This required figure applies universally to all medical claims submitted under that specific policy document.
Voluntary excess is an optional additional amount the policyholder agrees to pay per claim to secure a lower monthly rate. Adding a £50 voluntary excess to a £100 compulsory excess creates a total owner contribution of £150 per condition. Owners select higher voluntary limits to reduce their direct monthly premium payments. A voluntary excess is an optional fee chosen by the policyholder that acts in addition to the compulsory excess, directly reducing the total monthly premium cost.
How Do Fixed Excesses Work On UK Policies?
A fixed excess is a static monetary amount charged when a policyholder makes a claim for veterinary treatment. This figure remains constant regardless of the final treatment cost. Providers usually charge this amount once per condition per policy year, though exact terms depend on the chosen coverage level.
UK insurers offer three primary types of fixed excess structures based on the specific policy chosen:
- Lifetime Policies: Providers apply the fixed excess once per condition for the entire policy year, resetting the charge at the annual renewal date.
- Time-Limited Policies: Insurers deduct the fixed excess once per condition over a defined 12-month period, after which all coverage for that specific illness ceases.
- Maximum Benefit Policies: Companies apply a single fixed excess deduction per condition until the maximum financial limit is reached, with no time constraints.
The average out-of-hours veterinary consultation costs £268.92 in the UK as of 2026, according to ManyPets data. A policyholder pays the first £99 of the bill if they have a fixed excess of £99. The insurer then covers the remaining £169.92. Pet owners frequently ask what is the difference between a per-condition and per-year excess. A per-condition excess charges the owner once for a specific illness over the animal’s lifetime, while a per-year excess resets annually for the same ongoing condition.
What Is A Percentage Excess Or Co-Payment?
A percentage excess, or co-payment, requires the policyholder to pay a set percentage of the remaining veterinary bill after deducting the fixed excess. Insurers typically apply this structure to older animals to manage rising care costs. Common percentage excesses range from 10% to 25% of the outstanding balance.
The co-payment structure transfers a portion of the expensive treatment costs back to the pet owner. Insurers calculate the percentage only on the monetary amount left after subtracting the fixed fee. A £1,000 veterinary bill with a £100 fixed excess leaves £900 for the insurance company to process. A 20% co-payment on that £900 balance equals £180 in additional out-of-pocket costs for the owner. A percentage excess, also known as a co-payment, mandates that the pet owner pays a defined proportion of the veterinary bill remaining after the fixed excess deduction.
Why Insurers Apply Co-Payments To Older Pets
Animals require more frequent and expensive medical interventions as they age. The BVA (British Veterinary Association) notes that chronic conditions, such as osteoarthritis, diabetes, and hyperthyroidism, appear predominantly in older animals weighing over 10 kilograms (22 lbs). Insurers introduce percentage excesses to keep monthly premiums affordable for senior pets, as animals require more frequent and expensive medical interventions as they age.
Most UK insurers switch policies to a co-payment structure when a dog or cat reaches eight years of age. Specific dog breeds, including Great Danes, English Bulldogs, and French Bulldogs, often trigger these percentage terms earlier at age five. Your excess increases because older dogs present a higher statistical risk of developing expensive health conditions if you ask why your pet insurance excess increases. You should expect a co-payment to begin at the first policy renewal after your pet reaches the specific age threshold outlined in your policy terms.
Fixed Versus Percentage Excess: A Direct Cost Comparison
Fixed excesses offer predictable, low-cost contributions for expensive treatments, while percentage excesses scale upwards directly with the total bill. A £3,000 surgery with a £100 fixed excess costs the owner exactly £100. The same surgery with a £100 fixed excess and a 20% co-payment costs the owner £680.
Predictability forms the primary advantage of a fixed-only policy structure. Policyholders can budget accurately for emergency treatments when they know their maximum out-of-pocket cost is exactly £99 or £150. Complex surgeries, such as cruciate ligament repairs, hip replacements, and tumor removals, regularly exceed £3,500 in 2026. A fixed excess provides absolute cost predictability for policyholders, whereas a percentage excess increases the owner’s financial liability directly in proportion to the total veterinary bill.
Percentage models expose owners to high financial liability during catastrophic medical events. Owners must hold substantial emergency savings to cover these co-payments. The table below illustrates the exact financial difference between the two structures on a £2,000 veterinary invoice.
| Expense Type | Fixed Excess (£100) | Percentage Excess (£100 + 20%) |
|---|---|---|
| Total Veterinary Bill | £2,000 | £2,000 |
| Fixed Excess Deduction | -£100 | -£100 |
| Remaining Balance | £1,900 | £1,900 |
| Co-Payment Deduction | £0 | -£380 (20% of £1,900) |
| Total Cost to Owner | £100 | £480 |
| Total Paid by Insurer | £1,900 | £1,520 |
Does Adjusting Your Excess Lower Your Monthly Premium?
Increasing your voluntary excess directly reduces the monthly premium charged by the insurance provider. Insurers offer lower monthly rates because the policyholder accepts a higher degree of initial financial risk. Reducing the excess limit to zero forces the premium to its maximum possible price point.
The relationship between the excess limit and the premium operates on a strict inverse correlation. A policyholder opting for a £250 voluntary excess pays a lower monthly rate than someone choosing a £50 excess. The FCA (Financial Conduct Authority) requires insurers to display exactly how these adjustments change the total annual price before purchase. A lower excess costs more because the insurer must pay a higher proportion of every submitted veterinary bill.
Owners must balance immediate premium savings against future veterinary costs. Saving £10 a month on premiums yields £120 annually. A single veterinary claim negates the entire year of premium discounts if the owner selects a £200 higher excess to achieve that monthly saving.
Frequently Asked Questions About Pet Insurance Excess
Pet owners frequently ask about the timing, frequency, and mechanics of excess payments. The answers depend strictly on the specific terms outlined in the policy wording. Insurers apply these rules systematically during the claims adjustment process.
Can A Pet Insurance Provider Change My Excess Without My Permission?
Yes, an insurance provider can change your excess upon policy renewal. Insurers adjust policy terms, including excess amounts and co-payment percentages, at the annual renewal date to reflect the increasing age and changing risk profile of the pet. The FCA (Financial Conduct Authority) requires providers to notify you of these changes at least 14 days before the new terms take effect.
Do I Pay The Pet Insurance Excess Directly To The Vet Or The Insurer?
You pay the pet insurance excess directly to your veterinary clinic. The insurer never collects the excess payment from you. Instead, the insurance company simply subtracts the agreed excess amount from the final financial settlement they send to your bank account or directly to the veterinary practice.
Is It Better To Have A High Or Low Pet Insurance Excess?
Choosing a high or low excess depends entirely on your available cash reserves. A high excess lowers your monthly premium but requires you to pay more upfront during a medical emergency. A low excess increases your monthly premium but limits your out-of-pocket expenses when your pet requires surgery, medication, or hospitalization.
Does The Pet Insurance Excess Apply To Routine Treatments?
Pet insurance policies do not cover routine treatments, so the excess does not apply to these procedures. Owners must pay the full cost for preventative healthcare out of their own pockets. Standard UK insurance policies strictly exclude routine treatments, such as vaccinations, flea prevention treatments, and annual dental check-ups, from their financial coverage limits.
We independently analyze statutory Insurance Product Information Documents (IPIDs) and vet clinic price lists. We never accept commission, payment, or advertising from insurers. If policy terms change at renewal, please contact our editorial desk.