Insurance when buying a car

The condition that catches people

The automatic extension generally gives your new vehicle the broadest coverage you already carry on another vehicle. If you carry only liability — because your old car was old and you dropped collision and comprehensive — that's what extends.

So a financed new car can arrive with no physical damage coverage at all, which breaches the loan agreement and leaves you exposed. Call before you buy, not after.

Replacing versus adding

Policies commonly treat a vehicle replacing an existing one differently from an additional vehicle, including how long the automatic coverage lasts and whether you must notify the insurer within a set period.

The notification requirement is the part people miss. Ask your insurer both questions — how long, and by when must I tell you — and put the answer in your phone.

Before you go to the dealership

• Call your insurer and ask what extension applies to a new purchase
• Ask how long you have to notify them
• Confirm whether physical damage coverage would extend
• Get a quote for the specific vehicle if you know it — insurance cost varies a lot between models
• Have your policy number and proof of insurance ready

If you're financing or leasing

• The lender will require collision and comprehensive, and will force-place coverage at your expense if you don't carry it
• The lender must be listed as loss payee or lienholder on the policy
• Consider gap coverage — collision pays actual cash value, and a new vehicle can be worth less than the balance
• Check whether the dealer's gap product is competitive with your insurer's, since it often isn't

The trade-in

Remove the old vehicle from the policy once it's gone, but not before the new one is on. Overlapping by a day is harmless; a gap isn't.

Also cancel or transfer any coverage tied specifically to the old vehicle, and check whether removing it affects a multi-car discount.