HPI checks explained: outstanding finance, write-offs and stolen cars

Published 26 October 2026

A used car can look perfect on the surface and still carry a hidden financial or legal burden. Outstanding finance, a previous write-off, or a stolen marker can turn a seemingly good purchase into a costly mistake. For UK car traders and private buyers alike, the HPI check is the most reliable way to uncover these risks before money changes hands. On a typical day, around 10,851 used car listings appear online in the UK, about 1,731 of them from private sellers. Our data shows that not every car is what it claims to be, and the pressure to act quickly on a low price can cause buyers to skip essential checks. This guide explains exactly what an HPI check reveals, how to interpret the results, and how to use market data to separate genuine value from hidden danger.

What an HPI check actually covers

An HPI check is a vehicle history report that pulls data from multiple national databases. It is not a mechanical inspection. Instead, it answers the legal and financial questions that a test drive cannot. A full check typically includes:

The term "HPI" comes from a well-known provider, but you can get an equivalent check from the AA, RAC, or other approved companies. The key is that the report draws from finance houses, the DVLA, the Association of British Insurers, and police records. For a trader, it is a non-negotiable step before buying any stock. For a private buyer, it is the cheapest insurance you will ever buy.

Outstanding finance: the debt that stays with the car

A large proportion of used cars are bought on finance, and until the agreement is settled, the vehicle remains the property of the finance company. If you buy a car with outstanding finance, you do not legally own it. The lender can repossess it from you, even if you paid the seller in full and acted in good faith. You would then have to try to recover your money from the seller, which is rarely straightforward.

An HPI check will show whether there is an active finance agreement on the car. If there is, you need written confirmation from the lender that it has been cleared before you hand over any money. Never accept a seller's promise to pay it off later. The safest route is to pay the finance company directly and give the seller any remaining balance.

Private sellers are not always dishonest. Some genuinely do not realise their car still has finance, especially if they bought it without checking. However, a low price can be a warning sign. Our data shows that the dealer premium for an identical car is typically 10 to 14 percent. A private car priced well below that range should make you pause. It might be a genuine bargain, but it could also be a car someone is trying to shift before the finance company catches up. The same data tells us that cars priced 30 percent or more below the typical dealer price sell about 3.1 times faster than average. That speed can pressure buyers into skipping the HPI check, which is exactly what a seller with something to hide wants.

Write-offs: understanding Category S, N, A and B

When an insurer decides a car is not worth repairing after an accident, flood, or theft, it is recorded as a write-off. The category assigned determines whether the car can ever return to the road.

An HPI check reveals whether a car has ever been written off and which category applied. A Category S or N car can be a sensible buy if the repair was done properly, the price reflects the history, and you have evidence of the work. But many sellers hide this past. A private buyer might see a repaired Cat S car priced against clean dealer stock and think they have found a steal.

Our data highlights how misleading comparisons can be. We found that 38 percent of apparent bargains disappear once you compare private cars against private cars and dealer cars against dealer cars, instead of mixing the two. A written-off car that looks cheap next to a dealer's forecourt price may be average or even expensive when measured against other private cars with similar history. The HPI check gives you the category, so you can benchmark the price correctly and avoid overpaying for a car that will always be worth less and cost more to insure.

Stolen cars: how a check uncovers the truth

The HPI check cross-references the vehicle's details against the Police National Computer. If the car has been reported stolen and not recovered, or if it still carries a stolen marker even after recovery, the report will flag it. Buying a stolen car means you will lose both the vehicle and your money. The police will return the car to its rightful owner or the insurer, and you become an unsecured creditor of the seller.

Criminals often price stolen cars aggressively low to attract a quick, no-questions-asked sale. They may show a fake V5, or the VIN on the car may not match the documents. Always check the VIN stamped on the vehicle body against the report and the V5. If the seller is reluctant to let you inspect the VIN or insists on meeting in a car park rather than at their home, walk away. Our data on fast selling bargains reinforces the point: cars priced far below market disappear quickly, and that urgency can be a tactic to move a stolen vehicle before a check is run.

How to run an HPI check and what to look for

Running a check is straightforward. You will need the car's registration number and, ideally, the VIN. The VIN is usually visible at the base of the windscreen, on a plate under the bonnet, or stamped into the floor. Do not rely solely on the V5 document, as it can be forged.

Choose a reputable provider. A full check costs a modest fee and takes minutes online. The report will be several pages long. Focus on these sections:

A clean HPI report does not guarantee the car is mechanically sound. It tells you the car is not recorded as stolen, written off, or subject to finance. Combine it with a vehicle inspection and a test drive.

Red flags that demand a second look

Even before you pay for a check, certain behaviours should put you on alert. If a seller refuses to let you run your own HPI check, or offers a pre-printed report that is months old, treat it as a deal-breaker. Other warning signs include:

If you spot any of these, an HPI check becomes even more critical. It is better to lose a small fee on a check than thousands on a car you cannot legally keep.

Using market data to spot genuine bargains (and avoid traps)

Understanding how private and dealer prices relate to each other helps you identify real value. Our data shows that private sellers and dealers price the same car differently, with a typical dealer premium of 10 to 14 percent. That means a private car priced below the dealer average by an amount within that typical premium range is likely a fair private sale, not a hidden disaster. The gap accounts for the dealer's preparation costs, warranty, and consumer rights obligations.

However, the same data shows that 38 percent of apparent bargains disappear when you compare like with like. A car that looks cheap against dealer stock may be average when compared with other private listings. By filtering your search to compare only private cars, you get a truer picture of what a clean example should cost. Once you find a car that genuinely sits below that realistic market level, an HPI check confirms whether the low price is a genuine opportunity or a warning.

Flipilo is a tool that alerts you to private cars priced below dealer, so you can focus on genuine opportunities quickly. Once you spot a car that fits, an HPI check is the essential final step before you view or bid.

Frequently asked questions

Do I need an HPI check if I'm buying from a franchised dealer?

Reputable franchised dealers often run an HPI check as part of their preparation and may show you the report. However, you should still ask to see it or run your own. Some smaller independent dealers do not check every car. It is your right to verify, and a dealer who refuses a fresh check should not be trusted.

Can a car be written off and still be safe to buy?

Yes, Category S and N cars can be repaired to a safe standard and returned to the road. The key is to see evidence of the repair work, a current MOT, and ideally an independent inspection. The HPI check tells you the category, which helps you negotiate a price that reflects the car's history and future resale value.

What if the HPI check shows outstanding finance but the seller promises to clear it?

Do not hand over any money until the finance is settled and you have written confirmation from the lender. The safest method is to pay the finance company directly for the settlement amount and give the seller any remaining balance. Never rely on a promise, no matter how genuine the seller seems.

How often do stolen cars appear in private sales?

Exact figures are hard to come by, but our data on pricing behaviour shows that cars priced far below market sell extremely quickly. That urgency is a known tactic used to offload stolen vehicles before a check is run. If a private seller pressures you to buy immediately and the price seems too good to be true, an HPI check is your first line of defence.

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