Buying a used car in the UK, done properly

Set a realistic total budget

Not just the purchase price. Insurance, particularly for newer drivers, is often the biggest ongoing cost, and it varies enormously by car, so get a rough quote before falling for a specific model.

Decide dealer or private sale

A dealer gives you Consumer Rights Act protection at a higher price. A private sale is usually cheaper with far less legal protection, shifting more of the checking responsibility onto you.

Check the car's record before you view it

Pull the MOT history by registration number before arranging anything. It takes seconds and immediately shows whether the description matches reality.

Look for the specific red flags

Repeated advisories, mileage that doesn't add up, and hidden rust are the three things that catch most buyers out. Each has its own detailed guide.

Check for outstanding finance and write-off status

Neither is in free government data. A paid check (a few pounds via a provider like HPI) is genuinely worth it, since buying a car with undisclosed finance can mean losing it even after paying in full.

View the car yourself — check what no record shows

A clean MOT history is a strong signal, but it only covers what a tester happened to check on specific days, up to a year apart. A few minutes doing these yourself, in daylight, catches the rest:

• Start it from cold if you can — a knock, heavy smoke, or a rough idle on a cold start says more than the same engine once it's warmed up.
• Check tread and wear pattern on all four tyres, not just the two you can see easily — uneven wear across an axle can mean an alignment or suspension problem that hasn't failed an MOT yet.
• Look under the sills, wheel arches, and boot floor for rust or fresh underseal — bodywork rust isn't an MOT item until it's structural, so it can be well underway before any record shows it.
• Check panel gaps are even and paint matches across adjoining panels — a mismatch usually means accident repair, which won't appear in any MOT or tax record.
• Take a proper test drive, not just round the block — a brake pulling to one side, a slipping clutch, or a gearbox that crunches are easiest to catch at normal road speed.
• Check every electric window, the central locking, and that all warning lights clear after starting — common faults, and ones worth knowing about before you agree a price, not after.

Specific findings — from the record and from this walk-round — make for a far stronger negotiating position than a general feeling that the price seems high.

Insure before you drive, tax before you drive

Valid insurance has to be in place before the car moves at all, including the drive home. Tax doesn't transfer between owners since 2014, so the car is legally untaxed the moment ownership changes.