Plain-English guide
How Car Finance Deposits Work
What a car finance deposit does, how much you need, and how it cuts your monthly payment and total interest.
A car finance deposit is the cash you pay up front, which lowers the amount you borrow — so it cuts both your monthly payment and the total interest. There's no fixed minimum, but around 10% is common.
Here's how the deposit works, how much you need, what a part-exchange counts as, and how a bigger deposit changes the numbers.
How does a car finance deposit work?
A deposit reduces the amount you finance, because you borrow the car's price minus the deposit. Borrow less and you pay less interest over the term.
On a £20,000 car, a £2,000 deposit means you finance £18,000 instead of the full price. Since interest is charged on what you borrow, a bigger deposit shrinks both the monthly payment and the total amount payable. See the effect on the deposit calculator.
How much deposit do you need?
There's no fixed minimum deposit, but around 10% of the car's price is common, and some deals accept none at all. A bigger deposit lowers your cost and can improve approval.
A 10% deposit on a £20,000 car is £2,000. Putting more down reduces the interest and can help you get accepted, because you're borrowing less. No-deposit deals exist, but they finance the full price, so the monthly and the total are higher. The eligibility estimate shows what a budget supports.
What counts as a deposit?
A deposit can be cash, the equity in a car you part-exchange, or a manufacturer deposit contribution — or a mix of all three. Each lowers the amount you finance.
- Cash: money you pay directly towards the price.
- Part-exchange equity: the value of your old car above any finance still owed on it.
- Deposit contribution: money the dealer or manufacturer puts in as part of a deal.
How a bigger deposit changes the numbers
A bigger deposit cuts the monthly payment and the total interest, because you finance less. The saving compounds over a longer term.
Try different deposits on the deposit calculator to see your own monthly and total, or check the interest in pounds on the APR calculator.
Worked example
Work out the right deposit
The right deposit balances a lower total cost against keeping enough cash in reserve. Put down what you comfortably can, not everything you have.
Use the deposit calculator to find the sweet spot between a manageable monthly and a sensible cash buffer, then compare the whole deal on the main car finance calculator.
Frequently asked
How does a car finance deposit work?
How much deposit do you need for car finance?
What counts as a car finance deposit?
Does a bigger deposit lower your monthly payment?
Work out your next step
Independent calculators — pick the one that fits your situation.