What's a good profit margin when flipping cars in the UK?

There’s no single right number. Here’s how to think about margin properly, and how to check any margin claim before you trust it.

Why there’s no single “good margin” answer

Anyone quoting a flat percentage — “aim for 15%”, “don’t touch anything under £800” — is simplifying past the variables that actually decide whether a margin is good for you. A dealer turning fifty cars a month on tight capital needs faster, smaller, more certain margins than a solo flipper doing three cars a month who can afford to hold stock and wait for the right buyer. A £1,200 profit on a £4,000 car is a very different proposition to a £1,200 profit on a £25,000 car, even though the cash figure looks the same. Capital available, how many cars you’re turning per month, and how quickly a given car resells in your local market all move the answer — there isn’t a universal number, and anyone selling you one usually hasn’t done the maths for your situation.

Recon buffer and the hidden costs that erode margin

The asking-price-minus-comp-price figure most people quote as “the margin” is really the gross spread — before anything gets spent putting the car right. A realistic margin calculation deducts reconditioning (tyres, brakes, a service, cosmetic work — budget for it even on a car that looks clean in photos), transport if you’re collecting from any distance, and any MOT or repair work needed if the current one is due to expire soon. Skip this deduction and every margin looks better on paper than it turns out in practice. The gap between gross spread and net margin is usually where a “great deal” quietly becomes a break-even one.

Live comp-anchored pricing vs. a rule-of-thumb guess

There’s a real difference between “this car is probably worth about £9,000” as a gut feel and “this car’s cohort — same make, model, year band and mileage band — has a median dealer-retail price of £9,000 across several genuine comparable listings you can click through.” The first is a guess dressed up as a number. The second is checkable. Rule-of-thumb pricing gets less reliable the further a car sits from the mainstream — a well-specced niche model or an unusual colour combination can be priced very differently to the “typical” example a gut estimate assumes.

Red flags that erode margin fast

The costliest mistakes in car flipping aren’t usually paying slightly too much — they’re buying a car with a hidden problem that erases the margin entirely. A lapsed or patchy MOT history can mean expensive work is due immediately. A mileage discrepancy (see how to check if a car has been clocked) can mean the car is genuinely older, more worn and less valuable than the advert suggests. An undisclosed write-off category changes both the car’s real value and how easily you can sell it on. Any one of these can turn a healthy-looking margin into a loss — which is why a fraud or history flag should always override a good-looking number, never the other way round.

How to check a margin claim before you trust it

Whether it’s a sourcing tool’s number, a dealer’s asking price, or your own back-of-envelope estimate, the same three questions apply: is it anchored to real comparable listings you can inspect, or is it a black-box figure? Does it account for recon, transport and fees, or is it the raw gross spread? And has the car’s history — MOT, mileage, write-off status — actually been checked, or just assumed clean because nothing obviously wrong showed in the photos? See the current highest-margin makes by live data in the best cars to flip guide, the wider market snapshot in the UK sourcing market report, or run a single plate through a free instant check to see the comp-anchored working for yourself.