Dealer or private seller in the UK: your rights differ

Buy a used car from a UK dealer and the Consumer Rights Act 2015 gives you an implied right to goods of satisfactory quality, plus 30 days to reject the car outright if something's clearly wrong with it. Buy from a private seller and that Act doesn't apply at all: the older Sale of Goods Act 1979 only guarantees the car matches its description, not that it actually works, unless the seller turns out to be selling in the course of a business.

The distinction UK law draws turns entirely on whether the seller counts as a trader, not on how the listing happens to be worded.

Applies to: the United Kingdom (consumer purchase of a used car) Source: Consumer Rights Act 2015 and Sale of Goods Act 1979 (legislation.gov.uk), GOV.UK Checked: August 2026 Main exception: whether a seller counts as a trader is a question of fact, decided on how often and how commercially they sell, not on how the listing is worded; if you want to rely on that, you need evidence, Trading Standards is the route, not a self-assessment.

1. What actually makes someone a "trader"

The Consumer Rights Act 2015 applies "where there is an agreement between a trader and a consumer" for the sale of goods. Section 2 defines a trader as "a person acting for purposes relating to that person's trade, business, craft or profession, whether acting personally or through another person acting in the trader's name or on the trader's behalf," and a consumer as "an individual acting for purposes that are wholly or mainly outside that individual's trade, business, craft or profession." Section 2(4) adds a further protection, but it runs the other way to what you might expect: if a trader disputes that you, the buyer, were acting as a consumer, arguing you actually bought for business purposes, it's the trader who has to prove that, not you. It says nothing about whether the seller counts as a trader in the first place, that's a separate question of fact, decided on how often and how commercially someone sells.

2. Buying from a dealer: satisfactory quality, and 30 days to reject

Every goods contract with a trader carries an implied term that the car is of satisfactory quality, meaning "the standard that a reasonable person would consider satisfactory," judged against the price, the description, and the circumstances, and covering fitness for its usual purpose, appearance and finish, freedom from minor defects, safety, and durability. That term doesn't cover a fault the trader pointed out to you before you bought, or one a reasonable inspection on your part would have caught. If the car falls short, the Act gives you a short-term right to reject it outright within 30 days of taking ownership, delivery, and any installation being completed, and "an agreement under which the short-term right to reject would be lost before the time limit passes is not binding." After that window, you can still require a repair or replacement "within a reasonable time and without significant inconvenience," at the trader's cost; if that doesn't fix it, or the trader takes too long, the Act moves you on to a price reduction or a final right to reject, with one detail specific to cars worth knowing: normally no deduction can be made for your use of the goods if you exercise that final right within the first six months, "with exceptions for motor vehicles."

3. Buying privately: the car has to match its description, nothing more

None of that applies to a sale between two individuals. The Sale of Goods Act 1979 still implies a term that "the goods will correspond with the description" in a private sale, so a seller who describes the car inaccurately in the advert or in writing has broken the contract on that point alone. But the quality and fitness-for-purpose terms in the same Act only bite "where the seller sells goods in the course of a business": a private seller carries no such obligation. In practice, that means a private seller's car doesn't have to be roadworthy, mechanically sound, or free of hidden faults as a matter of law, only accurately described. Whatever wasn't part of that description is yours to have checked before you paid.

4. Why the listing's wording isn't the last word

A business owner selling a car through what looks like a personal listing doesn't stop being a trader by calling the sale private. GOV.UK's guidance on consumer protection law is written around exactly this kind of seller: anyone acting for business purposes owes the same duties regardless of how the sale is advertised. If you suspect the "private seller" is actually trading cars regularly, that's worth pursuing, but the burden of proving it sits with whoever makes the claim, you, if you want to rely on it. Trading Standards, not a self-assessment, is the route to establish trader status when a listing looks private but isn't.

What this means for the buyer

At a dealer, you're covered by satisfactory quality and a 30-day right to reject, with repair, replacement, and price reduction as fallback remedies after that. From a private seller, the car only has to be what it was described as, so get every claim about condition, mileage, and history in writing before you pay, because there's no statutory quality backstop behind it if something turns out to be wrong that you didn't specifically ask about. Our land-neutral guide on buying from a private seller vs. a dealer covers the same underlying pattern beyond the UK specifically.

A Plateop report for a UK-registered car pulls DVSA's MOT test and mileage history regardless of who's selling it: useful as a second data point against a dealer's word, and more useful still against a private seller, precisely because there's no statutory quality guarantee sitting behind that sale to fall back on. Check any car before you buy at plateop.com.