The Best Time to Get Pet Insurance (And Why Waiting Costs You)

If you're thinking about pet insurance but haven't bought it yet, this article is for you. The timing of when you purchase pet insurance has a larger impact on the coverage you'll actually receive — and the price you'll pay — than almost any other factor.

The short answer: the best time to get pet insurance is as soon as possible after bringing your pet home. Every week you wait is a week during which your pet could develop a condition that will be permanently excluded from coverage.

Why Timing Matters: The Pre-Existing Condition Problem

Pet insurance companies exclude pre-existing conditions from coverage. That means any condition your pet was diagnosed with, showed symptoms of, or received treatment for before the policy start date is not covered — ever.

Unlike human health insurance under the ACA, pet insurance companies can and do exclude pre-existing conditions indefinitely.

The practical consequence: as your pet gets older, the list of excluded conditions grows. A puppy insured at 8 weeks has no pre-existing conditions. That same dog insured at age 4 might have:

• A prior ear infection (some insurers exclude all future ear issues)
• A resolved knee injury (often excludes all orthopedic conditions)
• A diagnosed allergy (excludes skin and allergy-related conditions)
• A history of digestive issues (may exclude GI conditions)

Each of these is now carved out of your coverage. The policy you buy still has value, but its scope has narrowed, and the conditions most likely to recur are the ones excluded.

The Specific Problem With Orthopedic Conditions

Large breed dog owners take note: orthopedic conditions deserve special attention.

Cruciate ligament (ACL equivalent) injuries are one of the most common and expensive claims in dog insurance — and they're bilateral. Dogs who tear one knee ligament have a 40–60% chance of tearing the other within 1–2 years.

If your dog injures one knee before you have insurance, here's what happens:

• You pay $4,000–$6,000 for the first surgery out of pocket
• You buy insurance after the surgery
• The policy excludes the injured knee as pre-existing
• When the other knee goes, many insurers also exclude it as related to the first injury
• You pay $4,000–$6,000 again out of pocket

Insured before either knee injury: you'd have paid a deductible and 20%, roughly $1,000–$1,500 per surgery. Uninsured or insured too late: you pay the full cost twice.

What "Showing Symptoms" Means

The definition of pre-existing goes beyond formal diagnoses. Most pet insurance policies exclude conditions that showed symptoms before the policy start date, even if no diagnosis was made.

This creates a subtle problem. Your vet records may document observations or concerns that become the basis for an exclusion even if no treatment was ever given. Examples:

• Vet notes "mild limping" at a routine visit → orthopedic exclusion possible
• Vet notes "occasional soft stool" → GI conditions may be excluded
• Vet recommends monitoring a heart murmur → cardiac conditions potentially excluded

When you enroll in pet insurance, the insurer will typically review your vet records (sometimes at enrollment, more commonly at first claim). Anything in those records that predates your policy can be used to deny coverage.

The Age Factor: Premiums Rise As Your Pet Gets Older

Beyond pre-existing conditions, age directly affects what you pay.

Premiums increase significantly with age because older pets are more likely to get sick and to have expensive conditions. Here's a rough illustration for a medium-sized dog:

Age at Enrollment	Estimated Monthly Premium
8 weeks	$30–$45
1 year	$35–$55
3 years	$45–$70
5 years	$55–$85
7 years	$75–$120
9 years	$100–$175+

These premiums also keep rising each year as your pet ages further. A dog enrolled at 8 weeks will have paid lower total premiums over 10 years than a dog enrolled at age 5, even though the 5-year-old dog will pay the same higher rates going forward.

Some Insurers Won't Enroll Older Pets

Many pet insurance companies have enrollment age limits — typically 8–14 years. After that, they won't offer new policies.

If you wait until your pet is old to consider insurance, you may find that the window has closed entirely.

For existing policyholders, insurers can't cancel coverage just because your pet gets old (as long as you keep paying premiums). But getting a new policy at age 12 is often impossible or prohibitively expensive.

Waiting Periods: Even After You Enroll

Even when you do buy pet insurance, coverage doesn't begin immediately. All policies have waiting periods:

• Accidents: 1–14 days (often 2–3 days)
• Illnesses: 14 days (most common)
• Orthopedic/cruciate conditions: 6 months to 1 year at some insurers
• Cancer: 30 days at some policies

The waiting period means you're not fully protected the day you buy the policy. An illness that develops during the waiting period may be treated as a pre-existing condition.

This is another reason to buy early: if you enroll your puppy the week you bring them home, the waiting period passes before they're old enough to have many health experiences. If you enroll a 4-year-old dog "just in case," you may discover their first claim falls in the waiting period.

Special Case: Accident-Only Policies

If comprehensive coverage is too expensive but you want some protection, accident-only policies are a middle option. They're significantly cheaper — often $10–$20/month vs. $40–$60 for comprehensive — and cover accidents but not illness.

These make sense as a temporary bridge if you're building an emergency savings fund and want protection against the worst scenarios (swallowed objects, broken bones, trauma) while you save. But they leave you exposed to illness, which is where most large vet bills ultimately come from for older pets.

The Practical Takeaway

Get a quote the week you bring your pet home. Even if you don't buy immediately, you'll know the price and have a baseline. Many people who delay do so because they don't know how affordable young-pet insurance can be.

Insure before your first significant vet visit. Once your pet has been to the vet for anything beyond routine care, you have medical records that could support exclusions.

Even if your pet has some conditions, insuring now prevents future conditions from being excluded. A 4-year-old dog with a clean bill of health outside of one past ear infection can still be insured against cancer, heart disease, orthopedic injuries on the other limbs, and dozens of other serious conditions. The window to get meaningful coverage doesn't close until your pet is genuinely old and expensive to insure.

The math on waiting is almost always negative. Premiums are lower when pets are young and healthy, conditions haven't accumulated, and the years of highest risk are still ahead. Whatever you were planning to do with pet insurance — do it now.