How the calculator works
- The amount you borrow: the car price, less your deposit and part-exchange.
- Your monthly repayment: worked out so equal payments repay the loan, with interest, by the end of the loan.
- The real cost: everything you pay, up front and in repayments. The chart below shows how much of each year’s payments goes on interest.
An example
A £25,000 car with a £2,500 deposit leaves £22,500 to borrow. At 9.96% over five years, that’s £477.62 a month and £6,157 of interest. New personal loans averaged 9.96% in August 2026, according to the Bank of England; car finance rates can be lower.
The rate you’re offered depends on your credit history, the lender, the car’s age and the loan length, so use your own rate for the most accurate result.