How Car Finance Monthly Payments Are Calculated

When you see a monthly finance figure advertised alongside a used car, it can seem like a number that has appeared from nowhere. In reality, it is the result of several factors working together — and understanding them puts you in a much stronger position when comparing deals.

The vehicle price is the starting point. The higher the price of the car, the more you are borrowing, and the higher your monthly payments will be — all else being equal.

Your deposit reduces the amount you need to finance. A larger deposit means a smaller loan, which means lower monthly payments and less interest paid overall.

The interest rate (APR) is the annual cost of borrowing expressed as a percentage. A lower APR means less interest added to your repayments. Your credit profile, the lender and the type of finance product all influence the rate you are o?ered.

The loan term is the length of the agreement — typically 24, 36, 48 or 60 months. A longer term spreads the cost over more payments, making each one smaller, but you will pay more interest in total. A shorter term costs more each month but less overall.

For PCP agreements, a guaranteed minimum future value (GMFV) is also factored in. Because you are only financing the depreciation rather than the full value, monthly payments are lower — but a large balloon payment is due at the end if you want to keep the car.

Running the numbers with di?erent deposit amounts and term lengths before you apply gives you a clear picture of what you can comfortably a?ord each month.