Insurance shopping is one of the few financial decisions where the cheapest option is often the worst one — and yet that's where most people start. Here's a five-line checklist that takes about 90 seconds per policy and will save you from the most expensive mistake people make: under-buying coverage to save $5 a month.

The five-line checklist

1. What does it actually cover?

Open the policy summary. Look for the exclusions section. Exclusions are where the money is hidden. A homeowners policy that excludes water damage is not the same product as one that includes it — even if the monthly premium is identical.

2. What's the deductible vs. the maximum payout?

A $500 deductible and $50,000 cap is a very different product from a $2,000 deductible and $1M cap, even if they cost the same. Match the deductible to what you could comfortably pay out of pocket; match the cap to your worst realistic scenario.

3. How is "value" defined?

Replacement cost vs. actual cash value is the difference between getting paid what your laptop cost new vs. what your three-year-old laptop is "worth" today. Always read this clause.

4. Who's the underwriter?

Many insurance brands are actually fronted by other companies. Pumpkin is underwritten by Independence American. Figo is underwritten by Independence American too. This matters because the underwriter is who actually pays your claim — their financial strength rating (A.M. Best, S&P) is more important than the brand on the website.

5. How long until coverage starts?

Waiting periods vary wildly. Some pet insurers won't cover orthopedic conditions for 6-12 months. Some health insurers have 90-day waiting periods for pre-existing conditions. If you buy coverage planning to use it soon, you may be paying for nothing.

The two questions you can't skip

What to ignore

Skip TV-ad slogans, celebrity endorsements, and the cute mascot. Those cost the insurer money and that money comes out of your premiums.

The 30-second sanity check

Before you submit your application, ask yourself: If I had to make a $X claim tomorrow, would I know exactly what this policy pays me, and would I be satisfied with that number? If the answer isn't a confident yes, keep shopping.

The point of insurance is to remove anxiety, not add it. If you can't explain in one sentence what your policy does, you bought the wrong one.

Ready to put this to work? Check out our insurance comparison hub — we apply this exact checklist to every provider we cover.