Pet Insurance Cost Calculator
Free pet insurance cost estimator: monthly and annual premium from species, age, size and the level of cover you choose.

What does the Pet Insurance Cost Calculator do?
It estimates a monthly and annual pet insurance premium from the pet species, its age, its size and whether you want accident-only or comprehensive cover, using the standard price factors insurers apply.
- Inputs: species, age, size, coverage level.
- Output: monthly and annual premium estimate.
- Method: a base premium per species and cover, adjusted for age and size.
Quick answer
A three-year-old medium dog on comprehensive cover comes out near 48 a month, about 576 a year. Accident-only cover costs roughly half, and premiums rise sharply once a pet passes seven years old.
What This Calculator Really Does
Pet insurance premiums are quoted by insurers using a handful of factors that any estimate can mirror: which animal it is, how old it is, how big it is, and how much cover you buy. Dogs cost more than cats because they are bigger and prone to more conditions. Older pets cost more because the odds of a claim rise every year. Large breeds cost more than small ones for the same reason. And comprehensive cover, which pays for illness as well as accidents, costs roughly double accident-only cover. This calculator applies those factors to a base premium so you can budget before you start collecting real quotes.
The rules it applies
- Base premium: a dog on comprehensive cover about 48 a month, a cat about 32; accident-only roughly halves each figure.
- Age factor: 0.9 for pets under two, 1.0 from two to seven, and 1.4 above seven.
- Size factor: 0.9 for small, 1.0 for medium, 1.25 for large.
- Not modelled: breed-specific risks, your region, the excess, pre-existing conditions and the annual claim limit, all of which real quotes price in.
Worked example with real numbers
A three-year-old medium dog on comprehensive cover. The base premium is 48, the age factor is 1.0 because the dog is between two and seven, and the size factor is 1.0, so the estimate is 48 a month. Over a year that is 576. Switching to accident-only cover would drop the base to 22 and the monthly estimate to about 22, roughly 264 a year.
Reading the result
Treat the number as a budget anchor, not a quote. Real premiums swing widely with breed, region and the excess you accept. A higher excess lowers the monthly premium but leaves you paying more of each bill, so compare the total annual cost across a range of excesses rather than chasing the lowest month. Accident-only cover is a reasonable compromise for a young, healthy pet if a full illness policy stretches the budget, but it will not help with the conditions that most commonly cost owners money, such as allergies, infections and tumours.
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Frequently Asked Questions
How is the pet insurance cost estimated?
A base premium for the species and cover level is multiplied by an age factor and a size factor. The steps panel shows the base, both factors and the resulting monthly and annual figures.
What do I need to use the Pet Insurance Cost Calculator?
The species, the age in years, the size band and the cover level. All the pricing factors are built in.
What does the result from the Pet Insurance Cost Calculator show?
An estimated monthly and annual premium, split so you can see how the base, age and size each contribute to the total.
Why does pet insurance cost more for older pets?
Because the chance of a claim rises every year, insurers apply a steeper factor above about seven years old. This calculator uses a factor of 1.4 for pets over seven.
Is the Pet Insurance Cost Calculator really free?
Yes — 100 percent free, no sign-up, and everything runs in your browser.