How to buy or sell a used car in the UK

Ask the seller for the registration number and the mileage before viewing. A seller who will not give the registration is a seller to walk away from, because every meaningful free check depends on it.

Run the DVLA vehicle enquiry service. It confirms make, model, colour, engine size, fuel type, date of first registration, CO2 emissions, tax status, tax due date and MOT expiry. Compare every field against what the advert says. A colour that does not match may mean a respray covering accident damage; a first registration date that does not match may mean an imported vehicle described as UK-supplied.

Run the full MOT history, which is free and covers the whole life of the vehicle since testing began. Read it properly rather than checking the current MOT is valid. Look at the mileage recorded at each test and confirm it rises consistently — a drop, or a suspiciously flat period followed by a jump, indicates clocking or an odometer replacement. Look at advisories that recur year after year without being fixed, which indicate deferred maintenance. Look at gaps where no test was recorded, which indicate the car was off the road, possibly after damage.

Check whether it has been written off. Insurers record write-offs by category, and a car repaired after a serious write-off can be legally roadworthy but is worth materially less and can be harder to insure. The DVLA is notified of write-offs, and commercial history checks report the category.

Check for outstanding finance. If a car is subject to hire purchase or a conditional sale agreement, the finance company retains an interest and can repossess it from an innocent buyer in some circumstances. A paid history check covering finance, write-off, theft, mileage discrepancies and plate changes costs a modest sum and is the one thing worth paying for in the process.

Check the insurance cost before you commit, not after. Insurance groups vary enormously between apparently similar cars, and a young or newly licensed driver can find the premium exceeds the purchase price. Check the tax band too — vehicle tax rates depend on when the car was first registered and its emissions, and cars registered in some periods carry a substantial additional rate for several years based on list price.

Check whether the car complies with the clean air or low emission zone where you live or drive. A non-compliant vehicle carries a daily charge in several UK cities and this can dwarf the running costs. Zones and standards differ between England, Scotland and Wales, so check the specific scheme rather than assuming.

View at the seller's home address in daylight, never in a car park or lay-by. Ask to see the V5C and check three things: that the registered keeper's name and address match where you are standing, that the vehicle identification number on the document matches the VIN stamped on the car — usually visible at the base of the windscreen and on a plate in the engine bay or door pillar — and that the document itself looks right, with the correct watermark and no alterations.

Be aware of the V5C serial number check. DVLA publishes ranges of stolen blank V5C documents; a check against those ranges is part of any commercial history report. A car being sold with a brand new V5C and no supporting history is worth extra scrutiny.

Ask for the service history, previous MOT certificates, receipts for major work, the number of previous keepers and the reason for sale. Ask directly whether the car has ever been in an accident, whether it has outstanding finance, and whether it has been used as a taxi or driving school car. A private seller who lies in answer to a direct question gives you a far stronger position later than one who merely stayed silent.

Inspect for the obvious: uneven panel gaps, mismatched paint shades between panels, overspray on rubber seals, fresh underseal hiding corrosion, tyres from different manufacturers or with uneven wear indicating alignment or suspension problems, and warning lights that clear suspiciously quickly. Check the engine from cold — a seller who has warmed the car up before you arrive may be hiding a starting problem.

Test drive it properly, for long enough to reach motorway speed if the car is capable, and make sure you are insured to do so. Many comprehensive policies include driving other cars third party only, but this is far from universal and cannot be assumed; some sellers' policies cover test drives, and temporary cover can be bought for a day.

Consider a professional inspection for anything expensive. The motoring organisations and independent inspectors offer pre-purchase inspections that cost a fraction of the repair bill for the fault they typically find.

Pay by a method that leaves a trace and, where possible, offers recourse. A bank transfer is traceable but has no chargeback. Paying at least part of the price by credit card gives protection under section 75 of the Consumer Credit Act for purchases in the qualifying range, which is a genuine additional protection when buying from a trader. Avoid large cash payments. Get a written receipt with the date, price, registration, VIN, mileage, and both parties' names and addresses, signed by both. For a private sale, 'sold as seen' on the receipt does not remove the seller's obligation that the car matches its description or is of satisfactory quality where they described it as such.

When a vehicle is sold, the seller must tell DVLA immediately. The fastest route is online using the reference number on the V5C, which produces instant confirmation and an automatic refund of any full remaining months of vehicle tax. The alternative is posting the relevant section of the V5C, which is slower and where things go wrong.

The consequences of not notifying fall on the seller. Until DVLA records the change, the seller remains the registered keeper and is liable for vehicle tax, for the automatic penalty for an untaxed vehicle, and will receive any penalty charge notices, speeding notices and congestion charges the new keeper incurs. Sellers who post the V5C and hear nothing should chase — if confirmation does not arrive within a few weeks, assume it was lost.

The buyer should receive the green new keeper slip from the seller immediately, and the full new V5C in their own name from DVLA within a few weeks. If it does not arrive, contact DVLA — driving without being the recorded keeper causes problems with insurance, tax and enforcement.

Tax the car before driving it away. Vehicle tax is not transferable: the seller's tax is cancelled on notification and refunded to them, and the buyer must tax it in their own name using the new keeper slip. This can be done online or by phone in minutes. Driving an untaxed car is an offence detected automatically by number plate recognition, and the penalty arrives regardless of intent.

Insure it before driving it away too. Continuous insurance enforcement means a registered vehicle must be insured at all times unless it has a Statutory Off Road Notification, and enforcement is automatic against the registered keeper.

Check the MOT status separately from the tax status. A car cannot be taxed without a valid MOT if one is required, but a car can have tax that runs beyond an MOT that has expired. Driving without a valid MOT is an offence except when driving to a pre-booked test.

If the car is being taken off the road rather than sold, make a Statutory Off Road Notification, which stops the tax and the insurance requirement but means the vehicle cannot be used or parked on a public road at all.

Where a private plate is involved, transfer or retain it before the sale completes. Once the vehicle changes keeper, recovering a plate becomes far harder and depends on the new keeper's cooperation.

Buying from a trader — a dealer, garage, car supermarket or anyone selling in the course of business, including many high-volume sellers on classified sites — brings the Consumer Rights Act 2015 into play. The car must be of satisfactory quality, fit for purpose and as described. Satisfactory quality is judged by what a reasonable person would expect given the age, mileage and price, so a fifteen-year-old car is not held to the standard of a new one, but it must still be roadworthy and free of faults that were not disclosed.

The remedies are staged. Within the first 30 days you have a short-term right to reject the vehicle and get a full refund if it is faulty. After 30 days and within the first six months, the trader gets one opportunity to repair or replace; if that fails, you can reject for a refund, which may be reduced to reflect your use. After six months, the burden of proving the fault was present at the point of sale shifts to you, which usually means an independent inspection report.

For the first six months, faults are presumed to have been present at the time of sale unless the trader proves otherwise. This reversal of the burden of proof is the single most valuable protection in a used car purchase and it is why buying from a trader at a higher price is often better value than a private sale.

Buying privately is a different world. The Consumer Rights Act does not apply. The seller must not misdescribe the vehicle and must have the right to sell it, but there is no requirement that it be of satisfactory quality. 'Sold as seen' has limited legal effect but reflects the reality: if the gearbox fails a week later, that is your problem unless the seller lied about it. This is why asking direct questions and recording the answers matters — a false statement of fact that induced the purchase is actionable in a way that silence usually is not.

Buying at auction typically removes most protections by the terms of sale, and vehicles are frequently sold without warranty and without the chance to drive them. Auction is for people who can assess a car themselves and absorb the risk.

If a fault appears after buying from a trader, put the complaint in writing immediately, state that you are exercising your rights under the Consumer Rights Act, say what remedy you want and give a reasonable deadline. Stop using the car if you are rejecting it, because continued use undermines the claim. If the trader refuses, escalate to the trade body's alternative dispute resolution scheme if they belong to one, then to the county court through the small claims process, which is designed for unrepresented claimants.

If you paid by credit card, or partly by credit card, section 75 of the Consumer Credit Act makes the card issuer jointly liable with the trader for misrepresentation or breach of contract on qualifying purchases. This is a genuinely powerful route that survives the trader going out of business, and it is frequently forgotten.

As a seller, describe the car accurately including known faults. A description that omits a serious known defect can amount to misrepresentation even in a private sale, and the cost of being honest is a slightly lower price rather than a claim months later.

Insist on cleared funds before handing over the keys. Bank transfers can appear to arrive and later be reversed in fraud cases, and banker's drafts and cheques can be forged. Wait for the money to be confirmed as settled by your bank, not merely showing in the app.

Never let a prospective buyer test drive alone, confirm they hold a licence and insurance, and keep the V5C and keys separate from the vehicle until the sale completes. Meet at your home rather than a neutral location, because a buyer unwilling to come to your address is a buyer worth avoiding.

Notify DVLA online the moment the sale completes and keep the confirmation. Cancel your insurance only after the notification is confirmed, and remember to reclaim any unused premium.

Vehicle registration, tax and licensing are reserved matters administered by the DVLA across Great Britain, so the mechanics of buying, selling and taxing are the same in England, Scotland and Wales. Consumer rights under the Consumer Rights Act 2015 also apply across the UK, though Scotland has its own court structure — a claim goes through the simple procedure in the sheriff court rather than the county court small claims track.

Northern Ireland is administered separately for driver and vehicle matters, through the Driver and Vehicle Agency, and vehicle testing is arranged differently, with MOT-equivalent testing carried out at government test centres rather than by private garages. Use nidirect for the Northern Ireland process. Consumer rights are the same, but the enforcement route through the courts differs.

Clean air and low emission zone rules are devolved and vary — the London arrangements, the Scottish low emission zones and the schemes in English and Welsh cities have different standards, charges and exemptions. If a car's compliance matters to you, check the specific scheme for the places you actually drive rather than assuming a national standard exists.