Pet insurance works on a reimbursement model: you pay the veterinary clinic in full, file a claim, and the insurer pays you back the covered amount minus your deductible and your coinsurance share. Lemonade describes the mechanics plainly: you pay treatment costs up front, then after the claim is approved the deductible is subtracted and the coinsurance is applied before the remainder goes back to your account [Lemonade: The Ultimate Lemonade Pet FAQ, 2026]. It is not health insurance with copays at the desk; it reimburses, and what it reimburses is decided by four numbers and a list of exclusions.
How a policy works end to end
The sequence is the same at every major provider. You enroll, a waiting period runs before coverage starts, your pet is treated and you pay the clinic, you submit the itemized invoice and records, the insurer applies the policy terms, and you receive the covered portion. Payout speed varies: Healthy Paws states that approved claims are reimbursed on average within about one business day, by check or direct deposit [Healthy Paws Pet Insurance Plans, 2026]. A few insurers can pay some clinics directly at checkout, which changes the cash-flow shape of a large bill but not the amount, since the deductible and coinsurance still apply.
The waiting period is the part new buyers underestimate. The NAIC Pet Insurance Model Act prohibits waiting periods for accidents but allows up to 30 days for illnesses or non-accident orthopedic conditions, and requires that an insurer using a waiting period offer to waive it after a medical exam [NAIC: NAIC Passes Pet Insurance Model Act, 2022]. In practice providers set their own periods within that frame: Lemonade uses 2 days for accidents, 14 days for illnesses, and 6 months for cruciate-ligament events; Pets Best uses 3 days for accidents and 14 days for illness [Pets Best: What Does Pet Insurance Cover and Not Cover?, 2026]. Anything that surfaces inside a waiting period can become pre-existing and uninsurable, which is why enrollment timing decides what is even covered.
Deductibles, reimbursement, and limits
Three numbers, set when you buy, determine what a claim pays. Understanding them is the entire skill of buying pet insurance well.
The deductible is the amount you pay before reimbursement starts, and the type matters more than the amount. An annual deductible is met once per policy year and then applies to every condition for the rest of that year; a per-condition deductible is met once per condition but for the life of the policy. Trupanion, for example, uses a per-condition lifetime deductible, which is generous for one chronic illness but triggers a fresh deductible for each new unrelated condition in a multi-problem year [Trupanion: How pet insurance deductibles work, 2026]. Healthy Paws and Pets Best use an annual deductible that resets on renewal.
The reimbursement percentage (coinsurance) is the share of the covered cost the insurer pays after the deductible. Most providers offer a tiered choice, Lemonade, Pets Best, and ASPCA all offer 70%, 80%, or 90%, with the lower percentages buying a lower premium [Lemonade: The Ultimate Lemonade Pet FAQ, 2026]. Trupanion is the exception with a single flat 90% and no lower option, which is why its premium cannot be tuned down.
The annual limit is the maximum the policy pays in a year. Lemonade lets you select a limit anywhere from $5,000 to $100,000, while some plans, including Healthy Paws and Trupanion options, carry no annual cap at all [Trupanion: What are unlimited pet insurance payouts?, 2026]. The limit is the term that decides whether a long cancer course or a multi-year orthopedic condition keeps being paid or stops mid-treatment.
Policy: 80% reimbursement, $500 annual deductible, no prior claims this year.
Vet bill paid by you: $5,000. Subtract the $500 deductible, leaving $4,500. Apply 80% coinsurance: the insurer reimburses $3,600 and you keep $1,400 of out-of-pocket cost for the year.
If the same condition recurs later that year, the deductible is already met, so a second $3,000 covered bill reimburses at 80% of the full $3,000, or $2,400. If the policy carried a $5,000 annual limit instead of no cap, the second claim would be largely unpaid because the limit was nearly exhausted by the first. The limit, not the premium, is what fails you in a catastrophic year.
What is and is not covered
The base product at every major US provider is an accident-and-illness policy: it covers diagnostics, surgery, hospitalization, and prescription medication for new conditions, and it excludes anything pre-existing. Pets Best lists covered illnesses including cancer, diabetes, arthritis, allergies, cruciate-ligament injuries, and urinary and ear infections, which is representative of the category [Pets Best: What Does Pet Insurance Cover and Not Cover?, 2026].
The exclusions are where reimbursement is lost, and they are consistent across the field. Pre-existing conditions are excluded everywhere, defined by the NAIC model as any condition with advice or treatment before the policy date or during a waiting period. Routine and preventive care is excluded from the base policy and sold separately if at all: Embrace's Wellness Rewards is an optional non-insurance membership with a $300, $500, or $700 annual benefit, not part of the accident-and-illness coverage [Embrace Pet Insurance: Wellness Rewards, 2026]. The exam fee, the consultation charge on every sick visit, is the most underestimated carve-out: Pets Best includes it on most plans, while Trupanion reimburses "less the exam fee" on every visit. Orthopedic conditions usually carry a separate, longer waiting period than other illnesses.
This is also the YMYL boundary for this guide. Pet insurance is about whether and how a policy reimburses a cost; it is not veterinary advice, and nothing here addresses whether a pet needs a procedure or how a condition is treated.
Filing a claim
The claim itself is procedural, and most reimbursement shortfalls trace to the policy terms above rather than to the paperwork. You submit the itemized invoice and, on a first claim for a condition, the pet's medical history so the insurer can check it against the pre-existing exclusion. The insurer applies the deductible and coinsurance and pays the remainder; Healthy Paws cites an average of about one business day to issue approved reimbursement [Healthy Paws Pet Insurance Plans, 2026].
The reason claims disappoint is rarely a denied claim outright; it is partial reimbursement. Consumer Reports surveyed 3,583 policyholders and found only 44% received full reimbursement at their policy level after the copay on their most recent claims [Brian Vines, Consumer Reports Pet Insurance Buying Guide, 2026]. The gap is the structure working as written: the deductible, the coinsurance share, an exam-fee carve-out, or an annual cap. A buyer who understands the four numbers before enrolling is not surprised at claim time.
Choosing a policy
The buying decision is almost entirely about the terms, not the brand.
Before enrolling, settle four things: the deductible type (annual versus per-condition), the reimbursement percentage you can afford to trade against premium, the annual limit (or no cap) against your worst plausible year, and how the policy treats the exam fee and the orthopedic waiting period. Those determine three-year cost far more than the headline monthly premium does.
Read how to choose pet insurance for the term-by-term checklist and is pet insurance worth it for the cost-versus-benefit math. Mapped to the structures that matter: Lemonade for a tunable tiered plan, Trupanion and Healthy Paws for no-cap structures, and Pets Best for exam-fee-inclusive plans. /methodology/ sets out how FurVerdict reads each provider's sample policy. FurVerdict is an independent editorial site and not a licensed insurance agent; verify current terms with the provider before purchasing.