Car Loan Calculator

Calculate monthly car loan payments, total interest, and true cost of ownership including depreciation. Compare lease vs buy with full amortization table.

A car loan calculator estimates monthly payments, total interest, and total cost of financing a vehicle purchase over a set term at a given interest rate. Vehicle finance takes various forms across markets — hire purchase (HP), personal contract purchase (PCP), personal contract hire (leasing), and unsecured personal loans — each with different structures, ownership implications, and total costs. The calculator helps compare the true cost of different finance options before committing to a dealer's proposal. Loan Payment Calculator and Mortgage Calculator provide useful context for the broader financial impact.

PCP (Personal Contract Purchase) is common in the UK and some European markets — it includes a final "balloon" payment representing the guaranteed minimum future value (GMFV) of the vehicle. Monthly payments are lower than HP because you finance only the depreciation portion (purchase price minus GMFV) rather than the full vehicle value. Understanding this structure is essential for comparing PCP against HP or a personal loan on a total-cost basis.

Enter the vehicle price (or the amount to finance after any deposit or trade-in).
Enter the annual interest rate (APR) as stated in your finance agreement.
Enter the loan term in months (typical: 24, 36, 48, or 60 months).
For PCP, enter the optional final balloon payment (GMFV) — subtract the present value of this payment from the financed amount.
Read the monthly payment, total interest, and total amount payable.
Compare total cost of ownership across different finance types and terms to find the most cost-effective option.

Car loan payment formula

HP or personal loan monthly payment: PMT = P × r / (1 − (1+r)^−n)

where P = amount financed, r = monthly rate (APR ÷ 12 ÷ 100), n = term in months.

For PCP, subtract the present value of the balloon from the financed amount before applying the formula.

Worked example HP: 18,000 car, 3,000 deposit, 7.9% APR, 48 months. Finance = 15,000. r = 0.658%/month. PMT = 15,000 × 0.00658 / (1 − 1.00658^−48) ≈ 365/month. Total paid = 17,520. Interest = 2,520.

Understanding your car finance result

Total cost comparison across finance types

For a 20,000 car over 4 years at 8% APR: HP — approximately 488/month, total cost 23,400, you own the car outright; personal loan — similar total, no balloon risk; PCP with 8,000 balloon — approximately 310/month over 48 months plus 8,000 optional final payment = 22,880 total if you buy, or hand back the car. PCP is cheapest if you plan to change car every 3–4 years; HP or personal loan is cheapest if you keep the car long-term. Always compare Total Amount Payable (TAP), not just monthly payments.

Finance tips and best practices

Get pre-approved for a personal loan before visiting a dealership — knowing your rate gives you negotiating power and protection against overpriced dealer finance.
A larger deposit reduces both monthly payment and total interest — even an extra 1,000 deposit on a 4-year loan at 8% APR saves approximately 180 in interest.
For PCP, check the mileage limit carefully — exceeding it typically costs extra per mile at the end of the contract.
At the end of a PCP contract, compare the GMFV against the actual market value — if the car is worth more than the GMFV, you can sell it, pay off the balloon, and keep the equity.
Always compare APR, not just monthly payments — a lower monthly payment over a longer term often costs significantly more in total interest.

Vehicle finance is one of the most common forms of consumer credit globally — in the UK, over 90% of new cars are financed; in the US, approximately 85% of new vehicle purchases are financed.
The average car loan term has increased from 48 months to 60–72 months in most developed markets over the past decade — primarily to keep monthly payments affordable as vehicle prices rise.
Buying a nearly-new car (6–12 months old, low mileage) at 25–35% below new list price and financing with a personal loan is typically the lowest total cost strategy for most drivers.
A 1% increase in APR on a 20,000 loan over 4 years increases total interest paid by approximately 400 — relatively small in absolute terms but worth negotiating on larger or longer-term loans.

Common mistakes to avoid

Focusing only on the monthly payment rather than the total amount payable — a lower monthly payment over a longer term often costs significantly more in total.
Not reading the PCP GMFV conditions — the guaranteed future value typically only applies if the car is within agreed mileage, has a full service history, and is in good condition.
Agreeing to add-ons (GAP insurance, paint protection, extended warranty) as part of a finance agreement — these are almost always cheaper from independent providers.
Refinancing mid-contract without checking early settlement penalties — some finance agreements have significant early termination fees.

Vehicle finance regulation varies by country. In most markets, hire purchase and personal contract purchase agreements are regulated credit agreements that grant the finance company ownership of the vehicle until the final payment. Consumer protection laws in most jurisdictions require lenders to disclose APR, total amount payable, and key contract terms. For disputes about mis-selling or contract terms, contact the relevant financial regulator or consumer protection authority in your jurisdiction. This calculator is for illustrative purposes only and does not constitute financial advice.