Used Car Buying Checklist UK: Before You Pay

Before a viewing: prepare with the advert and your report

Save the advert and confirm the registration and mileage if they aren’t clear. You can then use CarDiligence to check the records and turn the findings into questions for the seller. It brings history, servicing and price information together and helps you plan maintenance costs.

You can also check individual records through free official services. The GOV.UK buying checklist explains those checks and what to examine in person. You don’t need to obtain every service document before ordering a report or arranging a viewing: ask what the seller has and when you can see it.

Do the make, model and registration in the advert agree with the available vehicle records?
What does the free official MOT history show about the sequence of tests and recorded mileages?
Which service records and itemised invoices are available?
Are there outstanding questions about finance, insurance write-offs or salvage records showing damaged cars offered for sale? These checks cover different things, so check what is included in the report you choose.
What is included in the price, and why might it differ from similar cars?

If finance is recorded, establish what type it is and confirm the settlement or permission to sell with the lender before completing the purchase. A seller’s promise alone does not establish that the car is free of finance. Dealer stock finance needs clarification too, although it does not by itself mean the car is unsuitable. Take time to resolve other important unanswered questions before buying.

When the records are available: compare the servicing

At the viewing, or earlier if the seller shares copies, compare the dates, mileages and work listed with the manufacturer’s service recommendations. Ask for invoices for major work mentioned in the advert. An MOT pass does not confirm servicing, and a stamp alone may not show which extra jobs were done.

Use our service-history checklist for a worked example and wording to request records. Check the exact engine before relying on anything said about its timing belt or chain. A report cannot tell you what condition those parts are in today.

At the viewing: check the car and the documents

Arrange to view the car in daylight, ideally when it’s dry. Check the registration and vehicle identification number (VIN) against the original V5C log book and the details you were given. The V5C records the registered keeper; it is not proof of ownership. Bring your report’s questions and ask for an explanation of any differences.

Check the available invoices against the work claimed in the advert.
Ask what has been done about past MOT issues and look for repair evidence.
Only take a test drive with the seller’s permission and confirmed insurance cover. Check that the car can legally and safely be driven; an MOT pass alone is not a guarantee of its condition.
Arrange an independent inspection for anything you’re not confident checking yourself.

History records can help you know what to look for, but the car still needs checking in person. If you’re unsure about its mechanical condition or signs of damage, a qualified inspector can help.

A message you can send the seller

Could you confirm the registration and mileage, and tell me what service records you have? If you can share relevant copies with personal details covered, that would help; otherwise, could I see them at the viewing? Is there any finance linked to the car, recorded damage, a current fault or work due soon? Would you be happy for me to arrange an independent inspection?

Tailor the message to the car. If a record raises a particular question, give its date and wording. A difference between records may have an innocent explanation. It’s worth asking, just as it’s worth checking something the advert doesn’t mention.

Before an offer: compare price and first-year spending

Look for cars with similar engines, equipment, age, mileage and condition, sold by the same type of seller. An asking price is not necessarily what the car sells for. Get quotes for work found during an inspection and keep these separate from estimated costs.

The first-year budget guide shows how to separate known costs, missing proof and a forecast. Negotiate using the evidence you have; no report guarantees that the seller will reduce the price.

Before payment: make sure you have the answers you need

Go back over anything that could change your decision: the car’s details, finance or history concerns, service paperwork, inspection results and your budget. Keep a written record of anything the seller agrees to provide or fix. Before paying a holding deposit, agree in writing when it would be refundable. Get a receipt for any payment. If an important concern remains, take time to get advice before you buy.

Before driving away, arrange your insurance and tax the car in your name. The seller’s tax does not transfer to you. GOV.UK explains how to tax a newly bought vehicle , including vehicles with no tax to pay.

Read Citizens Advice’s buying guidance for the differences between buying from a trader, privately or at auction. Select the guidance for your part of the UK on that page. Your rights depend on how and where you buy. This checklist gives general guidance, rather than advice about your individual legal position.

Where CarDiligence fits

Found a specific car? CarDiligence checks vehicle records and explains what they mean for your purchase. You’ll get questions for the seller, things to check at the viewing, points to discuss about the price and help planning maintenance costs. Read what the advert-based report checks and the sample report before ordering.

Read what to do alongside a history check . Your report brings the available record checks together and helps you decide what to ask. Official services let you check individual records yourself; a viewing or inspection helps you assess the car’s physical condition. AI explains the checked evidence. It doesn’t invent the vehicle facts.

What to check before buying a used car in the UK