BMW M4 Finance Calculator: APRs and Pricing

You've found the M4 you want — Competition, xDrive, maybe a 3.0 BiTurbo with a few miles on the clock — and the dealer's handed you a finance figure. It might be a good one. It might not be. Without something to measure it against, there's genuinely no way to tell from the number alone.

That's what Prefinance is for. We take the dealer's own finance example for the exact car in front of you and compare it against the best available rate from our panel of finance brokers for that type of vehicle. On average, that comparison turns up savings of up to 30% against dealer finance — though that's an average across many deals, not a promise for yours, and some dealer M4 finance is already priced competitively. Rates and calculations correct at time of posting but are subject to change.

Real M4 finance examples

These are live examples pulled directly from Prefinance's own BMW M4 page — real cars currently listed, with the dealer's price and the panel's rate side by side:

What's the difference between PCP and HP on an M4?

Both are hire purchase agreements in the legal sense — the car isn't yours until the last payment clears — but they split the cost differently. HP spreads the full price, minus your deposit, evenly across the term, so every payment chips away at ownership; that's why the HP rows above carry a higher monthly figure than the PCP rows on a comparable car. PCP holds back a Guaranteed (Minimum) Future Value until the end, which you can pay to keep the car, hand back, or roll into the next one — and it's that deferral that keeps the monthly payment down.

One assumption underpins the instant comparison: Prefinance assumes the new lender's GFV matches the dealer's own. If your matched broker structures the GFV differently, your real monthly payment could come out higher or lower than the illustrative figure.

Does the £60,260 regulated threshold matter on an M4?

It matters less consistently here than on a pricier car, but it's still worth checking. Consumer credit agreements only get FCA regulation — and protections like the ones below — where the amount borrowed is £60,260 or less. Most of the M4 examples above sit comfortably under that: even the £52,995 BiTurbo Competition only needs £27,995–£32,995 of credit once its deposit is applied. The one exception is the newest, highest-spec example — the 2024 Competition at £69,989 with a modest £6,999 deposit needs £62,990 of credit, just over the line. So on an M4, whether you're covered by the protections below often comes down to which specific car and deposit you're looking at, not the model as a whole.

Where an agreement is regulated, PCP and HP are structured as tripartite agreements: the dealer sells the car to the lender, who then hires it back to you until the final payment is made. Because the lender is legally the buyer, they're expected to help put things right if the dealer supplies a poor-quality car — in practice this can mean unwinding the deal, or the lender pressuring the dealer, since lenders are often unwilling to keep funding dealers with a poor service record. Two protections worth knowing: once you've paid half the total amount payable, you can hand the car back with nothing further to pay (voluntary termination), and once you've paid a third, the finance company can't repossess the car without a court order. Cross the £60,260 threshold, and none of this automatically applies — check your own amount of credit, not just the headline price.

How does Prefinance work out the saving?

You give us the vehicle — by registration, by make and model, or by pasting in a link from a dealer site or a listings site like Autotrader, as long as that page shows a finance example. We read the dealer's own quote and compare it against the best available rate from our broker panel for that type of vehicle. The comparison assumes you'd qualify for the panel's best rate, which depends on your credit profile, and that the dealer is FCA authorised. Every comparison you run is saved, so you can come back and check previous ones, not just your latest.

Representative APR is worth understanding here: it means at least 51% of customers offered finance by that provider get that rate or better. It's a genuine benchmark, not a promise of what you personally will be offered — and while we don't have a single confirmed average savings figure for BMW the way we do for some other makes, our panel is often competitive on M4s too, as the real examples above show; how much you'd actually save depends on the specific car and your own circumstances.

What affects the rate you're offered?

Credit score does most of the work, but not all of it. A bigger deposit lowers the amount you're borrowing and often the rate that comes with it — see the £20,000-versus-£25,000 comparison above. A longer term usually lowers the monthly payment but adds to the total interest. The car's age and mileage matter too, which is part of why the 2016 example above sits at a different rate profile to the 2024s. And a factor most buyers never think about: dealers and brokers earn commission for arranging finance, and that's a genuine reason two near-identical M4s can be offered at different rates by different dealers — it's exactly what our comparison is built to expose.

On the maths: a flat rate of 5% on £35,000 over four years works out to roughly £1,750 a year in interest. As a rough rule of thumb, APR runs at close to double the flat rate, so a 5% flat rate typically shows up as something like a 9.8–9.9% APR.

What to check before you apply

1. Confirm the deposit and mileage in your comparison match the dealer's actual quote — you can edit the deposit, but a mismatch elsewhere skews the result.

2. Work out your own amount of credit (price minus deposit) and check it against £60,260 — it decides which consumer protections actually apply.

3. Ask what happens to your monthly payment if the matched lender's GFV differs from the dealer's — don't assume it'll match exactly.

4. Read the broker's full representative example before signing — it carries the exact figures for your deal, not the illustrative ones above.

5. If you're buying through a business and considering Lease Purchase, expect to apply for a quote rather than getting an instant comparison.

None of this tells you in advance whether the dealer's M4 quote in front of you is already good — sometimes it is. The only way to know for sure is to run the comparison on your specific car and see what the panel comes back with.