Car insurance

Insurance is the cost most people underestimate when they buy a used car. It is also the one they have least control over on the day.

Three questions come up again and again. What is the price actually based on? When does cover have to start? And what did the last owner do to this car that you now have to declare?

Price first, because it drives everything else. Why your postcode affects car insurance explains how insurers read the place your car sits overnight, and how much of your quote is decided before anyone looks at you. The car's own rating matters too, and that system is mid-changeover. The old 1 to 50 insurance group is being replaced slowly, and most used cars still carry one.

Then the moment you actually buy. How to insure a car you have just bought covers the gap people fall into on the forecourt.

The cover you already have almost certainly does not reach a car you now own. The law is stricter than most drivers expect, because the policy has to name that vehicle. Tax does not transfer either, so both jobs are yours before you drive away.

Last, the one that catches honest buyers. Modifications a previous owner never declared sets out what happens when the alloys, the exhaust or the remap came with the car.

You did not fit them, and the duty to declare them is still yours. What decides it is not who did the work. It is what you knew.

One thread runs through all three. Insurers price on the car as well as the driver, so the questions worth asking before you buy are the same ones that shape the premium afterwards.