How to buy a used car in the UK: the complete checklist
8 min read · Updated 1 September 2026
Buying a used car is the biggest purchase most of us make after a home, yet it's often done in an afternoon. A little structure removes almost all of the risk. This checklist walks you through the whole process — deciding what you actually need, judging a fair price, inspecting the car properly, and paying safely.
1. Set a realistic budget — including the running costs
Start with the total you can spend, not just the sticker price. Insurance, road tax, fuel or charging, servicing and tyres all add up, and they vary hugely between models. A cheap car that's expensive to insure and run can cost more over three years than a pricier, efficient one.
If you're financing, work out the monthly payment you're comfortable with and treat that as the ceiling. Every listing on Carous shows a representative monthly finance estimate so you can compare like for like before you enquire.
2. Shortlist by need, then by want
Be honest about how you'll use the car. Mostly short urban trips? A small petrol or an EV makes sense. Regular long motorway runs? Diesel or a hybrid still earns its keep. Family and gear? Prioritise boot space and rear-seat room over badge.
Use the filters to narrow by body style, fuel, budget and mileage, then save a search so fresh matches come to you rather than you refreshing the results.
3. Judge whether the price is fair
Compare the car against similar age, mileage and spec examples — not just the same model. On Carous you can line up several cars side by side to see where one sits on price, mileage and equipment.
A price that looks too good usually is: it may reflect higher mileage, a patchy history, or a cosmetic issue not obvious in photos. That's not always a dealbreaker, but it should be explained.
4. Inspect the car in daylight
View the car dry and in good light — rain and dark hide a lot. Walk around it slowly looking for mismatched panel colours, uneven gaps and overspray, which can hint at past accident repairs. Check tyres (including the spare) for even wear and legal tread.
Inside, make sure every electrical item works, warning lights go out after starting, and the mileage matches the service history and MOT record.
- Panel gaps even, paint consistent across panels
- Tyres legal and evenly worn, matching brands across an axle
- All warning lights extinguish after start-up
- Service history present and mileage consistent
- Cold start — listen for knocks, watch for smoke
- Every electrical feature works (windows, aircon, screen, cameras)
5. Take a proper test drive
Drive for at least 15 minutes over varied roads. The engine should pull cleanly, the gearbox shift smoothly, the brakes stop straight without vibration, and the steering track true with hands off (briefly, safely). Any new noise, warning light or hesitation is worth asking about.
6. Check the paperwork and pay safely
Confirm the V5C logbook is present and the seller's details match, run a vehicle history check for outstanding finance and write-off markers, and verify the MOT history online. Buying from an established dealer adds a layer of protection here — every seller on Carous is a verified UK motor dealer, not a private seller.
Pay by a traceable method and keep the invoice. Never hand over a deposit for a car you haven't seen.
Frequently asked
Is it safer to buy from a dealer or a private seller?
Buying from a dealer gives you more legal protection under the Consumer Rights Act, and reputable dealers pre-check their stock. Every vehicle on Carous is sold by an established UK dealer, not a private seller.
How many miles is too many on a used car?
There's no hard limit — a well-maintained car with full history at 90,000 miles can be a better buy than a neglected one at 40,000. Look at condition and service record, not the odometer alone.
Should I get an independent inspection?
For a higher-value or complex car, an independent pre-purchase inspection is money well spent. For a straightforward car from a reputable dealer with full history, a careful viewing and test drive is often enough.