Pre-existing Conditions and UK Pet Insurance: What Can Still Be Covered

The short answer

Most UK pet policies do not cover pre-existing conditions, but the phrase means different things at different insurers, and the rules turn on signs and symptoms rather than diagnoses. A symptom recorded in your pet's notes before cover began can count, even if no one ever named a condition.

Some wordings look back 24 months; others exclude anything noticed before cover began, however long ago. The good news is that there are routes back to cover: some insurers will cover a condition once it has been clear for two years, and one plan we reviewed is built for more recent conditions, with up to £1,500 a year for those conditions.

What counts as pre-existing

Definitions vary, but the shape is similar across the market: what matters is what was seen, not what was diagnosed. ManyPets looks back 24 months, and counts anything your pet had treatment, medication or advice for, including observations recorded in the clinical history. Napo uses the same 24-month window for symptoms, treatment, medication or advice.

Animal Friends counts a condition first noticed before the policy started or during the waiting period, even if it never needed treatment, and uses a limping dog later diagnosed with arthritis as its example. Waggel's line is signs or symptoms before you joined, or within its 14-day waiting period, which it calls the warm-up.

Tesco's policy document avoids the label, excluding anything you were aware of, or a vet had noted or checked, before the policy started. Petplan takes a different route: it asks about past illness at the proposal stage and decides case by case, listing whatever is excluded on your certificate.

In practice, the assessment usually happens at claim time. Insurers request your pet's full medical history and apply what they find, which is why a note you had forgotten about can decide a claim months or years later.

The routes back to cover

Exclusions are not always permanent. The routes back fall into two groups: giving the condition time, or an insurer assessing it case by case.

• Two years clear: ManyPets covers conditions on all of its plans once they have ended more than two years before a plan starts, and Napo reviews old conditions after a two-year clear period.
• Three months clear, with a limit: ManyPets also sells a Standard Care Pre-existing plan that covers conditions that have shown no signs, symptoms, treatment, medication or advice for three months before cover starts, up to £1,500 per plan year inside a £7,000 vet-fee limit. Chronic conditions that need ongoing treatment are still excluded, as is the other side of a bilateral problem.
• Case by case: Petplan covers some pre-existing conditions straight away, some after a clear period, and some not at all. It also lifts temporary exclusions on request once the records show the condition has settled, such as three symptom-free months for kennel cough or twelve for a perforated eardrum.

What almost never comes back is a condition expected to affect your pet for life, such as arthritis or a long-running skin disease. Insurers price for ongoing claims, and a condition that needs regular treatment stays outside cover under every route above.

Bilateral conditions

One rule recurs in every insurer's wording: bilateral conditions. A problem that can affect both sides of the body, such as hips, knees, ears or eyes, is treated as a single condition.

If the left knee was treated before cover, insurers will usually treat a later problem in the right knee as the same condition, so the second leg is not a fresh claim. ManyPets, Animal Friends and Waggel all write the rule in similar terms, and it applies to limits and excesses too: one condition, one limit, one excess.

Switching insurers

Changing insurer does not give a pet a clean medical history. The new insurer assesses pre-existing conditions from scratch, and a condition your old insurer had accepted can be excluded by the next one, even if you never claimed for it. Waiting periods are the clearest thing a switch can fix: ManyPets waives its waiting periods for pets insured elsewhere for 12 continuous months, Napo waives them for a no-gap switch, and Tesco does the same for dogs with continuous prior cover.

Not every insurer does this: Animal Friends publishes no such waiver, so check the wording before switching. The Financial Ombudsman Service is blunt on the wider point: it is unlikely a lifetime policy with a new insurer will cover conditions your pet already has. Before cancelling anything, check what the new policy will do with the conditions you already know about.

If a claim is declined

Pre-existing conditions are a recurring source of pet insurance disputes. Pet insurance produced 2,065 new complaints to the Financial Ombudsman Service in 2025/26, of which 41.4% were upheld, and another 593 arrived in the first quarter of 2026/27.

No public statistics show how often claims are declined for pre-existing reasons, but the ombudsman's test in a dispute is consistent: was the claimed condition the same as, or related to, the earlier problem, and what did the owner know? It looks at medical records and at what was said when the policy was sold, and it has made clear that telling a customer to read the policy document is not enough.

Common questions

Can you buy pet insurance that covers pre-existing conditions?

A few options exist. ManyPets' Standard Care Pre-existing plan covers conditions free of signs, symptoms, treatment, medication or advice for three months, up to £1,500 a year, provided they are not chronic. Petplan assesses pre-existing conditions individually and covers some of them. Outside those routes, most policies exclude anything that predates cover.

Does an undiagnosed condition count?

It can. Insurers work from signs and symptoms, not just diagnoses: if your dog was limping before the policy started and a vet later confirmed arthritis, that can count as pre-existing even though nobody had a name for it at the time. Disclosing everything you have noticed at the proposal stage is the safest route.

What happens if I switch insurer with an ongoing condition?

Expect the new insurer to treat it as pre-existing if it has shown signs or needed treatment in the last two years, even if you never claimed for it. The switching waivers on the market cover waiting periods rather than pre-existing exclusions, so the condition itself travels with your pet.

If my pet's condition gets better, will it be covered later?

Sometimes. The main route is time: ManyPets covers conditions on all plans once they have been clear for more than two years, and Napo reviews old conditions after a two-year clear period. Conditions that need ongoing treatment are the least likely to become eligible again, whichever insurer you ask.

Will an old injury from years ago affect a new policy?

It can, particularly if it affected a joint, an eye or an ear, because those can recur on the other side. Insurers apply related-condition and bilateral rules, and the ombudsman has accepted that logic in disputes where the records showed the owner knew the second side was likely to be affected. Disclose it and ask the insurer to put its position in writing before you buy.

Definitions differ between insurers, so read the wording of the policy you are considering.