7 things your car dealer won't tell you about finance (but we will)
The car finance industry has a transparency problem
The FCA's investigation into discretionary commission arrangements — which led to a redress scheme covering an estimated 14 million finance agreements — confirmed what many buyers had long suspected: the way car finance is sold doesn't always prioritise the customer. Dealers had financial incentives to offer buyers higher rates. Millions of people paid more than they needed to without knowing it.
That scandal has changed some things. But it hasn't changed everything. There are still practices, structures, and terminology in car finance that most dealers won't volunteer to explain — because explaining them in full doesn't always serve the dealer's interests.
We think that's wrong. So here are seven things the industry typically stays quiet about — and what we do differently at Carsa on every single one.
1. The advertised APR probably isn't the rate you'll get
When a dealer advertises a finance rate — say, 8.9% APR — that's the representative APR. By law, it only needs to be available to 51% of accepted applicants. The other 49% can be offered a higher rate. And because the higher rate generates more profit for the finance provider (and sometimes the dealer), there's rarely any incentive to volunteer that information.
Most buyers assume the advertised rate is the rate they'll receive. Many discover differently only when they see the actual agreement — often at the point of signing, when momentum and excitement make it hard to pause and question.
What Carsa does: we use a soft search eligibility checker that shows your personal likely rate before you apply — with no impact on your credit score. The rate in your agreement won't be a surprise. Check your rate here →
2. A longer finance term costs you significantly more overall
Monthly payments are what dealers lead with. A 60-month term sounds appealing compared to 48 months — lower payments, easier to manage. What rarely gets mentioned is what it costs in total interest over those extra 12 months.
On a £15,000 loan at 10.9% APR, the difference between 48 and 60 months is roughly £25–30 per month — but around £800–£1,000 more in total interest paid. The monthly saving creates an overall loss. Most dealers present the monthly figure prominently. The total amount payable, which tells the real story, often appears in smaller print.
What Carsa does: every finance illustration we provide shows the total amount payable clearly. We'll always explain the full cost difference between term lengths before you sign anything.
3. The difference between flat rate and APR is designed to confuse
Some finance providers — particularly in older-style agreements and some personal contract hire products — quote interest as a flat rate rather than APR. A flat rate of 4% sounds cheaper than 10.9% APR. It usually isn't.
A flat rate calculates interest on the original loan amount for the full term, regardless of how much you've paid back. APR calculates interest on the declining balance. On a £12,000 loan over 48 months, a 4% flat rate produces a very similar total cost to around 7–8% APR — and can produce a higher total cost than a 10% APR deal when not compared carefully. The FCA requires APR to be quoted in consumer credit advertising, but flat rate figures still appear in some contexts and can mislead buyers who compare the numbers at face value.
What Carsa does: all our finance is quoted in APR. We don't use flat rate figures. If you ever see a finance deal elsewhere quoted as a flat rate, ask for the equivalent APR before comparing.
4. Add-on products carry significant margins — and are often sold at the last moment
Payment protection insurance, GAP cover, tyre and alloy insurance, cosmetic protection, extended warranties — these products are typically presented at the point of finalising the deal, when the buyer is tired, relieved, and keen to complete. That timing isn't accidental.
Add-on products can be genuinely useful. GAP insurance, for example, covers the difference between your insurance payout and your outstanding finance if the car is written off — a real and legitimate risk. But the margins on these products are often substantial, and the pressure to bundle them into a finance agreement — where the cost disappears into a slightly higher monthly payment — means buyers often don't scrutinise them as they would a standalone purchase.
What Carsa does: our add-on products — extended warranty, paint protection, tyre and alloy cover — are priced transparently and presented without pressure. Every car already comes with a 90-day warranty included at no extra cost. Any additional cover is your choice, made clearly, without a countdown clock.
5. "0% finance" is almost never actually free
Zero percent finance deals look like an obvious win. No interest, just spread the cost of the car. But the mechanics behind them are worth understanding before you assume you're getting a free lunch.
Manufacturers and dealers who offer 0% typically subsidise the finance cost by reducing or eliminating any discount on the car's purchase price. The interest you're not paying in the finance agreement has effectively been baked into the price instead. A car available for £18,000 on 0% finance might be available for £16,500 if you paid cash or arranged your own finance — meaning the £1,500 "saving" from zero interest was never really there.
0% deals are also almost exclusively available on new cars from manufacturer-backed lenders. On used cars — where the real value is — they don't exist. If you see 0% on a used car, read the full terms extremely carefully.
What Carsa does: our cars are priced on average £700 below market value. We don't inflate prices to subsidise headline finance rates. The price you see is the price — and then we offer competitive finance on top of that.
6. Your part exchange value and the car's price are negotiated together — and one can hide what's happening with the other
This is one of the oldest techniques in the dealer playbook. A buyer fixates on getting a strong part exchange value. The dealer agrees — and quietly recovers the margin by reducing the discount on the new car, or by adding to the finance rate. The buyer feels like they won the negotiation. The numbers tell a different story.
The same can happen in reverse: a low part exchange offer is made, but the car's price is discounted generously, leaving the buyer unsure which adjustment actually benefited them. When purchase price, part exchange value, finance rate, and add-ons are all in play simultaneously, it becomes very difficult to know whether you're genuinely getting a good deal overall.
What Carsa does: our cars use no-haggle pricing, set daily against market data. The price you see is the price. Part exchange valuations are handled separately and transparently, so you can assess both numbers independently. There's no shell game between the two.
7. Discretionary commission arrangements still shape how finance is sold in some places
The FCA banned discretionary commission arrangements (DCAs) in 2021 — the practice by which dealers could set a buyer's interest rate above a lender's minimum, pocketing the difference as additional commission. The ban was a significant step. But the redress scheme launched in 2026 exists precisely because billions of pounds were extracted from buyers through this mechanism in the years before the ban.
Even post-ban, commission arrangements between dealers and finance providers still exist — they're just no longer discretionary on rate. Dealers still receive referral fees for placing finance. There's nothing inherently wrong with that, but buyers have a right to know it happens. The FCA now requires dealers to disclose commission arrangements to customers on request.
What Carsa does: we're transparent about how our finance process works. If you ask how our finance arrangements operate, we'll tell you. We think that's the basic standard any buyer deserves — and one the industry as a whole should hold itself to.
Finance should work for you, not against you
None of the above means car finance is a product to avoid. Used car finance — done transparently, with the right rate, on a fairly priced car — is genuinely one of the best ways to get into a reliable vehicle without a large upfront sum. The problem has never been the product. It's been the way the product is sometimes sold.
At Carsa, finance starts from 8.9% APR. Our cars are priced below market value. Every car comes with a 90-day warranty. And you can check your eligibility in two minutes without affecting your credit score — so you walk in knowing your rate before you're anywhere near a signing table.
Check your eligibility — no credit impact →
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