UK car finance lenders check your credit file with Experian, Equifax or TransUnion, your income-to-debt ratio, and your address/electoral roll history. A deposit of 10% or more typically unlocks better APRs and is often the minimum dealers ask for, though 0% deposit deals exist at a cost. Under FCA rules, at least 51% of successful applicants must receive the advertised "representative APR" — so a good credit score and bigger deposit are what actually get you near that rate rather than a much higher one.
At a glance
| Factor | Why it matters |
|---|---|
| Credit reference agencies | Experian, Equifax, TransUnion — lenders may use one or blend all three |
| Typical minimum deposit | 10% of the car's price, though some deals offer 0% deposit at a higher rate |
| Representative APR rule | At least 51% of accepted applicants must get the advertised rate; the rest pay more |
| Electoral roll | Being registered to vote at your current address boosts your identity-verification score |
| Hard vs soft search | Comparison/eligibility checkers use soft searches that don't affect your score; full applications leave a hard search mark |
What lenders actually look at
Car finance is regulated consumer credit, so lenders run an affordability and creditworthiness check before approving you. They pull your credit file from one or more of the three UK credit reference agencies — Experian, Equifax and TransUnion — checking your repayment history on loans, credit cards and mobile contracts, any missed payments or defaults, your existing debt level relative to income, and how long you've lived at your current address. They also check you're on the electoral roll, since it helps confirm your identity and stability; not being registered can quietly knock points off your score even with a clean payment history.
Why the deposit size changes your rate
A bigger deposit reduces how much the lender is risking, which is why 10%+ deposits typically earn a noticeably better APR than a 0% deposit deal on the same car. Many dealer adverts feature enticing 0% deposit offers, but read the APR: it's usually higher to offset the lender's extra risk. As a rough guide, moving from a 0% to a 20% deposit can shift you from a mid-teens APR to something closer to high single digits on the same finance product, though the exact numbers depend on the lender and your credit profile.
The representative APR rule — and why you might not get it
Under FCA advertising rules, at least 51% of people who take out the advertised finance deal must receive the exact representative APR shown in the ad. That means up to 49% of applicants can be quoted a higher rate based on their own credit assessment. A strong score and solid deposit are what push you into that 51% rather than the higher-rate group.
How to improve your position before you apply
- Check your free credit report with Experian, Equifax or ClearScore/TransUnion and correct any errors (wrong address history, accounts that aren't yours)
- Register on the electoral roll at your current address if you haven't already
- Pay down existing credit card balances — utilisation above roughly 50% of your limit hurts your score
- Avoid multiple credit applications in a short window; each hard search is visible to lenders for up to a year
- Use a lender's soft-search eligibility checker first — it shows your likely approval odds and rate without leaving a mark
- Save the biggest deposit you comfortably can; 15-20% often meaningfully improves the rate offered
What a weak credit file means in practice
If your file shows missed payments, high existing debt, or a thin credit history (common for young or new-to-UK buyers), expect either a higher APR, a request for a larger deposit, or referral to a specialist "bad credit" car finance lender — these exist but usually charge noticeably more, sometimes north of 20% APR. Building even six months of on-time payments on a credit-builder card before applying can measurably shift your options.
Never apply to several dealers' finance in the same week hoping to compare offers — each full application is a hard search and multiple searches close together can itself lower your score. Use eligibility checkers (soft search) to shop around instead.
Frequently asked questions
What credit score do I need for car finance in the UK?
How much deposit do I need for car finance?
Does checking my eligibility for car finance hurt my credit score?
Can I get car finance with bad credit in the UK?
Does being on the electoral roll really affect car finance approval?
Sources & further reading
- FCA — Consumer credit and motor finance
- MoneyHelper — Improve your credit score
- Which? — Car finance guide
Figures, prices and policy details were current at the last-updated date above. Automotive pricing, incentives and regulations change frequently — verify time-sensitive details with the linked primary sources. Read our editorial policy and fact-checking standards.
