Pet insurance is genuinely useful for many owners, but the differences between policies matter far more than the marketing suggests, and the details that matter most usually aren't the headline monthly price.
Accident-only versus accident-and-illness
The cheapest policies typically cover only accidents (trauma, foreign body ingestion, poisoning) and exclude illness entirely — meaning something like chronic kidney disease, diabetes, or cancer wouldn't be covered at all. Accident-and-illness policies cost more but cover the conditions that actually generate the largest lifetime veterinary costs for most cats.
Pre-existing condition exclusions
Every policy excludes conditions that existed before coverage started, but the definitions of "pre-existing" vary. Some policies permanently exclude a condition once diagnosed; others allow a condition to become eligible again after a defined symptom-free period (sometimes called a "curable pre-existing condition" clause). This distinction matters enormously for conditions like urinary blockage that can recur.
Reimbursement model, not just percentage
Most policies reimburse a percentage (commonly 70-90%) of the vet bill, but check whether this is based on the actual amount charged or a "benefit schedule" — a fixed payout table by procedure or condition that can fall well short of actual costs, especially for specialist or emergency care. Benefit-schedule policies are usually cheaper monthly but can leave you covering far more than the percentage suggests at claim time.
Annual and per-condition limits
Look for both an annual payout cap and any per-condition lifetime cap. A policy with a low per-condition cap can be exhausted quickly by a single chronic condition like diabetes, which needs ongoing management for the rest of the cat's life.
Waiting periods
Nearly all policies have a waiting period (commonly 14-30 days for illness, sometimes shorter for accidents) before coverage begins — meaning insurance purchased after a cat is already showing symptoms won't cover that specific issue. Enrolling while a cat is young and healthy, before any symptoms exist, avoids this gap entirely and also typically gets better rates.
Breed-specific and hereditary condition coverage
Check specifically whether hereditary and congenital conditions are covered, particularly relevant for purebred cats with known breed-associated risks (like HCM in Maine Coons or PKD in Persians) — some policies exclude these by default or require an additional rider.
What insurance doesn't replace
Insurance is a reimbursement mechanism, not a payment mechanism — nearly all policies require you to pay the vet upfront and file for reimbursement afterward, meaning you still need accessible funds at the time of treatment. A separate emergency fund alongside insurance, rather than insurance as a complete substitute for savings, is the more realistic approach.