When you buy a car on dealer finance, you're not borrowing money from the dealer. Almost always, the dealer is acting as a credit broker — they submit your application to a panel of lenders, one of whom approves it, and the dealer earns commission from that lender for introducing the business. The car finance agreement is between you and the lender. The dealer's role is introduction and convenience, not cost saving.
Understanding this matters because it changes the negotiation. You're not accepting a favour from the dealer. You're considering a financial product presented through their sales process, with their commercial incentive built into the rate.
This article is for information only and doesn't constitute financial advice. Seek advice from an FCA-authorised adviser before taking out credit.
How dealers make money from finance
Dealers earn commission from lenders for each finance agreement arranged. This is calculated as a percentage of the amount financed — on a typical used car deal, the commission can range from £200 to £800. Until January 2021, dealers could operate what the FCA called Discretionary Commission Arrangements (DCAs): they could set the interest rate the customer paid within a range set by the lender, and earn more commission for charging a higher rate. The higher they pushed the APR, the more they made.
The FCA banned DCAs in January 2021. Commission arrangements are still permitted, but they must be disclosed in the finance paperwork and can't be linked to the interest rate charged.
It's worth noting that the FCA's 2024 review into historic car finance commissions — including arrangements prior to the DCA ban — is an ongoing matter. The Court of Appeal ruled in October 2024 that hidden commission arrangements may entitle affected customers to compensation. The FCA has advised consumers who had car finance before 2021 to hold their complaints while the review concludes. If you believe you were charged a higher rate than necessary due to commission arrangements pre-2021, the FCA's published guidance and the Financial Ombudsman Service are the relevant routes.
The actual cost difference
The gap between dealer finance and a personal bank loan depends on your credit profile, but for good-credit borrowers it's meaningful:
- Good credit: Personal bank loan 5–8% APR vs dealer HP/PCP 8–15% APR
- Average credit: Personal loan 9–15% APR vs dealer finance 12–20% APR (smaller gap; dealer finance may be more accessible)
- Adverse credit: Personal loans become difficult to obtain; specialist dealer finance at 25–40% APR may be the only route. See the guide on car finance with bad credit.
Worked example — £10,000 car, £2,000 deposit, 48-month term (£8,000 financed):
- At 6% APR (personal loan): £188/month — total interest paid: £1,024
- At 11% APR (dealer HP): £207/month — total interest paid: £1,936
- Difference over 4 years: £912
That £912 gap isn't hypothetical — it's the straightforward arithmetic of a lower APR on the same borrowing. For good-credit borrowers, a personal loan is almost always cheaper than dealer-arranged finance on a used car.
The negotiating advantage of arriving as a cash buyer
When you've a pre-approved personal loan in your pocket before visiting a dealer, you're effectively a cash buyer. That changes the conversation. Instead of discussing monthly payments — which obscures total cost and keeps attention away from the car's price — you're negotiating the outright price of the vehicle. Dealers are generally more willing to move on price when you're paying cash, because they lose the finance commission but get a clean, unconditional sale.
The strategy: get a personal loan pre-approved with your bank (a soft search so it doesn't affect your credit file at this stage). Visit the dealer. Negotiate the car's price as a cash buyer. Then, when they offer you dealer finance to try to recover the commission, compare their APR directly against your pre-approved loan rate. If their offer is genuinely competitive, consider it. If it's not, use your loan. You lose nothing by making them compete.
When 0% finance is genuinely 0%
Manufacturer-subsidised 0% finance deals on new cars — and occasionally on approved used vehicles within a manufacturer's own programme — can be genuinely interest-free. The manufacturer subsidises the cost through their finance arm as a sales promotion. BMW Financial Services, Volkswagen Financial Services, and Ford Credit all operate deals of this type.
On independently-sourced used cars advertised at 0% by dealer groups, check whether the car's price has been inflated above market to absorb the interest cost. A car priced £1,500 above comparable listings on 0% finance isn't a 0% deal — it's a deal where the interest has been moved from the finance charge into the purchase price. Compare the car's price against similar private-sale and dealer listings before assuming the 0% is a genuine saving.
Section 75 protection: credit wins over cash
One genuine advantage of dealer finance over a personal loan is Section 75 of the Consumer Credit Act 1974. If you purchase something costing between £100 and £30,000 on credit, the credit provider is jointly liable with the seller for any breach of contract or misrepresentation. If the dealer goes bust, or the car turns out to be materially not as described, you've a claim against the finance company — not just the dealer.
A personal loan used to pay cash doesn't carry this protection. The loan and the purchase are legally separate transactions. For a higher-value car from a dealer whose financial stability you're uncertain about, this is a real consideration — not a reason to take expensive finance, but worth factoring in when comparing an offer within 1–2% APR of your loan rate.
The practical approach
Before visiting any dealer: check your bank's personal loan APR online (soft search, no credit impact). At the dealer: let them make their finance offer before revealing you've a loan lined up. Compare their quoted APR against your personal loan rate. If their offer is meaningfully higher, use your loan. If it's close — and especially if the car is high value — weigh up Section 75 protection as a tiebreaker. If you're unsure, ask them directly: "What is the total amount payable, and is the APR negotiable?"
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