Pet insurance is sold in three basic shapes: accident-only plans, accident-and-illness plans, and wellness add-ons or programs for routine care. They differ far more than the similar marketing suggests. An accident-only plan will not pay a dollar toward cancer or diabetes. A wellness program is often not insurance at all. And the plan that looks cheapest today may change price sharply as your pet ages.
This guide compares the three using the latest industry figures from the North American Pet Health Insurance Association (NAPHIA) and the definitions in the National Association of Insurance Commissioners (NAIC) Pet Insurance Model Act, which a growing number of states have adopted in some form. It ends with a worked example of the same vet bills under each plan type.
The three plan types at a glance
| Plan type | What it covers | What it does not | Best fit |
|---|---|---|---|
| Accident only | Injuries from accidents: swallowed objects, cuts, broken bones, poisoning, car accidents | Any illness, including infections, cancer, allergies and chronic disease | Tight budgets, or pets whose owners can self-fund illness care |
| Accident and illness | Accidents plus illnesses diagnosed after waiting periods: infections, cancer, diabetes, hereditary conditions (if not excluded), often diagnostics, surgery, hospitalization and prescriptions | Pre-existing conditions; routine care; often exam fees, dental cleanings or behavioral care unless included | Most owners who want protection against large, unexpected vet bills |
| Wellness add-on or program | Scheduled, predictable care: annual exams, vaccines, flea and heartworm prevention, routine bloodwork, sometimes dental cleaning, up to set amounts per item | Accidents and illnesses (unless paired with insurance) | Owners who like budgeting routine costs monthly |
By market share, accident-and-illness plans dominate. NAPHIA reports average U.S. accident-and-illness premiums of $836 a year for dogs and $435 for cats in 2025, compared with $190 and $112 for accident-only plans.
Accident-only plans
Accident-only plans are the lowest-cost entry point. They can be useful for young, healthy pets, especially when an owner mainly fears a sudden emergency such as a dog eating a sock or being hit by a car. The trade-off is significant: many of the most expensive problems pets face are illnesses. Cancer treatment, kidney disease, diabetes management and chronic allergies all fall outside an accident-only plan.
Ask how the plan treats conditions that blur the line. A torn knee ligament (cruciate ligament) is often classified as an orthopedic condition that may be treated as illness, not accident, and some plans apply separate waiting periods or exclusions to it. Read the definition of "accident" and "illness" before buying.
Accident-and-illness plans: features that matter
Comprehensive accident-and-illness plans are what most people mean by pet insurance. When comparing them, these are the features that change what you get back:
| Feature | Common choices | What to check |
|---|---|---|
| Annual deductible | $100 to $1,000 | Whether it is annual or per condition; whether it resets each policy year |
| Reimbursement rate | 70%, 80% or 90% | Applied after the deductible, to covered charges only |
| Annual limit | $5,000, $10,000, or unlimited | Whether limits are per year, per condition or lifetime |
| Exam fees | Included or excluded | Sick-visit exam fees can be a meaningful share of every bill |
| Hereditary and congenital conditions | Covered, limited or excluded | Especially important for breeds prone to hip dysplasia or heart disease |
| Dental | Illness and injury covered, cleanings usually not | Whether tooth extractions and periodontal disease are included |
| Payment method | Reimburse you, or pay the vet directly | Whether you must front the full bill |
The NAIC model act requires insurers in adopting states to disclose a summary of how they calculate claim payments, whether they use a benefit schedule or "usual and customary" fee limits, and whether they reduce coverage or raise premiums based on claims history, pet age or a move. That disclosure document, titled "Insurer Disclosure of Important Policy Provisions" in the model, is the fastest way to compare plans. Our reimbursement calculator guide shows the deductible-then-percentage math.
Wellness add-ons and programs
Wellness coverage pays for predictable care in fixed amounts, such as $50 toward a vaccine or $150 toward a dental cleaning. Because the costs are expected, the value is mostly budgeting: if the plan costs $25 a month and pays up to $350 a year, you are prepaying routine care, not transferring risk.
The model act draws a firm line. It defines a wellness program as a subscription or reimbursement program separate from an insurance policy, and it requires that buying one is never a condition for buying pet insurance, that its cost and terms are shown separately, and that it be disclosed in bold type as not insurance. If wellness benefits are written into the insurance policy itself, they become insurance and must follow insurance rules. Practical test: add up exactly what your pet will use each year and compare it with the program's annual cost.
Pre-existing conditions and waiting periods apply to all three
Every plan type typically excludes conditions that existed before coverage started or during a waiting period. The model act defines a pre-existing condition as one where, before the policy's effective date or during a waiting period, a veterinarian gave medical advice, the pet was treated, or verifiable records show signs or symptoms. A condition covered under a policy cannot be treated as pre-existing at renewal.
Under the model act, waiting periods may not exceed 30 days for illness or orthopedic conditions, waiting periods for accidents are prohibited, and policies must allow the waiting period to be waived after a veterinary exam. These limits apply where a state has adopted them; otherwise, plans may set their own. Our guide to pre-existing conditions and waiting periods covers these rules in depth.
How to choose
- Decide what you are protecting against: only emergencies (accident-only), any large unexpected bill (accident and illness), or routine budgeting (wellness).
- Get the plan's disclosure of important policy provisions and sample policy before buying.
- Compare at least two plans on the same deductible, reimbursement rate and annual limit.
- Check whether premiums rise with age and by how much; ask for example renewal rates at ages 5, 8 and 10.
- Confirm exclusions for your breed's common conditions.
- Use the free-look period. The model act gives 15 days to return a policy for a full refund if no claim has been filed.
Questions readers ask
What is the difference between accident-only and accident-and-illness pet insurance?
Accident-only covers injuries such as broken bones or swallowed objects. Accident-and-illness adds diseases and infections diagnosed after waiting periods, which are often the costlier conditions.
Is a pet wellness plan insurance?
Usually not. Standalone wellness programs prepay routine care. Under the NAIC model act, they must be sold separately, disclosed as not insurance, and never required to buy a policy.
How much does pet insurance cost?
NAPHIA's 2025 U.S. averages were $836 a year for accident-and-illness coverage for dogs and $435 for cats; accident-only averaged $190 and $112.
Do pet insurance premiums go up as my pet ages?
Often yes. In states that adopted the model act, insurers must disclose whether they raise premiums based on age, claims or location. Ask for sample renewal prices.
Can I switch plan types later?
You can, but a new policy may treat conditions diagnosed under the old one as pre-existing. Choose carefully the first time, especially for young pets.
Sources and further reading
Sources checked October 25, 2026. Figures are the latest published by each source at that date.
- NAPHIA State of the Industry Report 2026, highlights (2025 U.S. average premiums by plan type)
- NAIC Pet Insurance Model Act (#633, adopted 2022)
- NAIC: Pet insurance consumer topic page
- American Veterinary Medical Association: Pet insurance for owners
General educational information, not advice for your situation. Policy wording, state law and the insurer's decision control actual coverage. Written and edited by K.R. Not reviewed by a licensed insurance agent; confirm details with a licensed professional or your insurer. Examples use hypothetical figures unless a source is named. Report a correction.
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