Auto Loan Calculator
Estimate your monthly car payment
Input Information
Loan Amount: $30,000
Result
Enter values and press Calculate.
Auto Loan Calculator estimates your monthly car payment from the vehicle price, down payment, loan term, and APR. Walking into a dealership already knowing what monthly payment fits your budget changes the negotiation entirely.
Evaluate the result from two angles: the monthly payment that leaves your account each month, and the total interest you will pay over the life of the loan. Depending on how term and APR are combined, total interest can swing by thousands of dollars on the same car.
APR (Annual Percentage Rate) includes not just the nominal interest rate but also lender fees, so it represents the true cost of borrowing. Two loans with identical headline rates can carry different APRs — always compare offers by APR, not by the advertised rate.
- 1
Enter the vehicle price
Type in the negotiated selling price of the car. If options and discounts are already settled, use that final number rather than the sticker price.
- 2
Add your down payment
Include cash plus any trade-in credit. Every dollar here reduces the amount you actually finance.
- 3
Choose the loan term
Most auto loans run 36–72 months. Try several terms and watch monthly payment and total interest move in opposite directions.
- 4
Enter APR and calculate
Use the APR from a pre-approval based on your own credit profile, then swap in dealer-offered rates to compare. Getting pre-approved from a bank or credit union gives you leverage at the table.
Example 1 — Baseline scenario
You buy a $32,000 SUV, put $5,000 down, and finance $27,000 for 60 months at 7.9% APR. The monthly rate is 7.9% ÷ 12 ≈ 0.658%. Plugging into the formula:
That works out to about $546 per month. Over 60 months you would pay roughly $32,770 in total, meaning around $5,770 in interest — remember the car costs you $32,000+, not $27,000.
Example 2 — Shortening to 36 months
Keep everything identical but change the term to 36 months: the payment rises to about $845, yet total interest drops to roughly $3,400. Choosing 36 months over 60 saves about $2,300 — one of the most reliable ways to cut borrowing costs if the higher payment fits your budget.
- PMT = Monthly payment
- P = Principal (vehicle price − down payment)
- r = Monthly interest rate (APR / 12)
- n = Number of months
This is the standard amortization formula. Early payments are mostly interest; as the loan matures, more of each payment goes toward principal — which is why extra payments made early in the loan save the most interest.
Put 20% down or more
A larger down payment helps you avoid negative equity and often qualifies you for a lower rate.
Compare APR, not just the rate
Identical headline rates can hide different fee structures. Compare loans by their APRs.
Shorter terms save the most
If your budget allows, aim for 48 months or less. 72-month loans accumulate heavy interest and can leave you underwater on the car.
Shop outside the dealership
Bring a pre-approved rate from your bank or credit union. Competing offers are themselves negotiating leverage.
QHow much down payment should I make?
A down payment of at least 20% of the vehicle price is generally recommended. A larger down payment reduces the loan principal, which lowers both your monthly payment and total interest. It also protects you from negative equity — the situation where you owe more than the car is worth. For a $30,000 vehicle, that means putting down at least $6,000 in cash or trade-in value.
QAre dealer 0% APR promotions really worth it?
Zero-percent financing looks attractive, but it usually requires giving up a cash rebate offered to other buyers. In many cases, taking the rebate (say $2,000), adding it to your down payment, and financing at a regular rate like 6% APR results in a lower total cost. Always calculate both scenarios and compare the total amount paid over the life of each loan.
QWhat about prepayment penalties?
Many auto loans charge a fee if you pay off the balance early, typically 1–2% of the remaining principal within the first few years. Some lenders waive it after a set period, and plenty of modern auto loans have no prepayment penalty at all. If there is any chance you will pay the loan off early, confirm the terms before signing.
QIs a shorter loan term always better?
Shorter terms mean higher monthly payments but substantially less interest. In the worked example below, choosing 36 months instead of 60 months saves roughly $2,300 in interest. That said, if the higher payment would exceed about 15–20% of your monthly budget, the risk of missed payments outweighs the interest savings. Balance affordability against total cost.
QDoes the monthly payment include everything?
No. This calculator reflects only principal and interest on the loan itself. Real ownership costs add insurance premiums, fuel, maintenance, registration fees, and taxes, which together can reach 10–15% of the vehicle's value per year. Sales tax on the purchase may also apply depending on your state or country, so include it when budgeting.