🚗 Auto Loan Calculator
Find your exact monthly car payment. Enter the vehicle price, down payment, trade-in value, sales tax rate, and loan terms to see the full cost breakdown.
How Auto Loan Payments Work
Auto loans are typically simple interest installment loans — interest is calculated on the outstanding balance each month, and your fixed payment covers that month's interest plus a portion of the principal. The amount you actually finance is the vehicle price minus your down payment and any trade-in value, plus applicable taxes and fees. Understanding all of these components prevents surprises at the dealership where price negotiation and financing are often deliberately bundled together.
Down Payment and Trade-In Value
A larger down payment reduces the amount financed, which lowers your monthly payment and the total interest you pay. It also immediately reduces the risk of being "underwater" — owing more than the car is worth — which can happen quickly with new vehicles that depreciate 15–25% in the first year. Trade-in value functions like a down payment if applied at purchase. Dealers sometimes offer above-market trade-in values in exchange for a higher vehicle price, so knowing both figures independently helps you evaluate the deal clearly.
Auto Loan Rate Factors
Auto loan interest rates vary based on your credit score, the age of the vehicle (new vs. used loans carry different rates), the loan term length, and whether you finance through a bank, credit union, or dealership. Credit unions consistently offer competitive rates for members. Getting pre-approved before visiting a dealership gives you a benchmark rate and more negotiating leverage — you can accept dealer financing only if it genuinely beats your pre-approval.
The True Cost of Buying a Car: Beyond the Monthly Payment
Dealers are expert at focusing your attention on the monthly payment — and for good reason: a $500/month number feels manageable regardless of whether it comes from a 36-month loan at a good rate or a 72-month loan at a mediocre one. On a $35,000 vehicle financed at 6.9% for 72 months, the monthly payment is $537 and total interest paid is $3,664. For the same vehicle financed at 6.9% for 48 months, the payment is $836 — but total interest is only $2,128. Stretching the loan saves $299/month but costs $1,536 more over the loan's life. This is before accounting for the most significant ownership cost many buyers overlook: depreciation. A new car typically loses 15–25% of its value in the first year and roughly 50% over five years. On a $35,000 vehicle, that is $17,500 in depreciation over five years — more than the total interest on either loan above.
How to Interpret Your Monthly Payment Result
The monthly payment figure this calculator provides is your break-even math — it tells you how much you must pay to satisfy the lender, nothing more. The more useful figures are (a) the total interest paid over the loan's life, and (b) the total amount you will have paid for the vehicle when the loan is fully repaid. For a financed purchase, the true purchase price = selling price + taxes and fees + total interest. A "no-haggle" $30,000 sticker price with 7% APR over 60 months results in a true purchase price of approximately $35,580 — and that is still before insurance, maintenance, registration, and fuel. Knowing the total cost helps you make a clear-eyed comparison against alternatives like leasing, buying used, or keeping your current vehicle longer.
Common Mistakes When Financing a Vehicle
The most widespread mistake is negotiating the monthly payment rather than the purchase price. When you focus negotiations on "I need to stay under $500/month," the dealer can adjust the term length, trade-in value, and dealer fees to hit that target while maintaining or increasing their profit. Always negotiate the out-the-door price first, separately from financing. A second common error is accepting dealer financing without comparing external offers. Dealers earn commission on the financing they arrange, and they have discretion to mark up the rate above what the bank offers them — sometimes by 1–2 percentage points. Getting pre-approved from a credit union or bank before visiting the dealership gives you an immediate benchmark. A third mistake is rolling negative equity (the remaining balance on a previous loan) into the new vehicle loan, which often results in being "upside down" immediately on the new purchase.
Real-World Example: New vs. Used
Consider two buyers both wanting a mid-size SUV. Buyer A finances a 2025 model at $42,000 for 60 months at 7.1% APR — monthly payment $832, total interest $7,920. The vehicle is worth roughly $22,000 after 5 years. Net cost of ownership (loan payments minus remaining value): about $27,920. Buyer B finds a 2022 model with 28,000 miles for $28,000, financed at 6.5% for 48 months — payment $665, total interest $3,920. After 3 years, the vehicle is worth roughly $18,000. Net cost of ownership over those 3 years: about $13,920, or $4,640/year versus $5,584/year for Buyer A. Used vehicles also typically carry lower insurance premiums and registration fees. The trade-off is warranty coverage and the risk of inherited maintenance issues, which a pre-purchase inspection ($100–$150) can largely mitigate. For a broader look at how loan payments and interest work, see the Loan Calculator. If you are considering whether to redirect car payment money toward other goals, the Compound Interest calculator shows how those dollars could grow over time.