Auto Loan Calculator
Calculate your car loan monthly payment including trade-in, down payment, and interest rate. Compare loan terms from 24–84 months. Free auto loan calculator.
Reviewed for accuracy by Marcus Webb and the Blueprint Dynamics editorial team (last updated July 2026). Our calculators use primary-source formulas and are cross-checked against IRS publications, Fannie Mae guidelines, and Federal Reserve data. Learn more about our methodology.
Source: Federal Reserve, Freddie Mac, Bankrate national averages. Rates are approximate ranges for borrowers with good credit (700+). Actual rates depend on your credit score, loan-to-value ratio, and lender.
Monthly Payment
$586.98
for 60 months (5.0 years)
Loan Amount
$30,000
Total Interest
$5,219
Total Cost
$35,219
How auto loan rates are determined
Auto loan interest rates vary by credit score tier, loan term, vehicle age, and lender type. Buyers with excellent credit (750+) typically qualify for rates 3–4% lower than buyers with fair credit (620–669). New vehicles generally receive lower rates than used vehicles because new cars carry less risk of mechanical failure and have clear title histories. Lender type matters significantly: credit unions routinely offer rates 1–2% below dealer financing for equivalent credit profiles, and online lenders like LightStream and PenFed often compete aggressively for strong-credit borrowers.
The hidden cost of long loan terms
A 72 or 84-month loan term lowers your monthly payment but dramatically increases total interest paid — and creates a serious negative equity risk. Cars depreciate fastest in years one through three. On a $35,000 vehicle financed for 84 months at 7%: monthly payment is $529, but you'll pay $9,436 in total interest, and your loan balance in year two will likely exceed the car's market value by $4,000–$8,000. If the car is totaled or you need to sell, you'd owe more than the insurance pays — a gap you must cover out of pocket unless you have gap insurance.
Shorter terms (36–48 months) cost more monthly but are financially superior for a depreciating asset. The common financial guideline is the 20/4/10 rule: 20% down, finance for 4 years or fewer, and keep total car costs (payment + insurance) under 10% of gross monthly income.
Trade-in vs. selling privately
Dealer trade-ins are convenient but typically yield 10–20% below private sale value. On a $16,000 vehicle, this gap is $1,600–$3,200. Use Kelley Blue Book's Instant Cash Offer, CarMax's online offer, and Carvana's offer as market baselines before negotiating a trade-in. Some states offer sales tax advantages on trade-ins — you only pay tax on the difference between the new car price and trade-in value — which can partially offset the lower trade-in price for high-value vehicles.
Down payment and its effect on the loan
A larger down payment reduces your loan principal, your monthly payment, your total interest, and your negative equity exposure. On a $30,000 vehicle: 0% down at 7% for 60 months = $594/month, $5,641 total interest. 20% down ($6,000) = $475/month, $4,513 total interest — saving $1,128 in interest plus eliminating gap risk in the early months. Gap insurance (typically $20–$40/month) covers the difference between your loan balance and the car's actual value if totaled — worth considering if your down payment is under 20%.
Pre-approval before you shop
Getting pre-approved for an auto loan before visiting a dealership gives you a rate benchmark and removes financing as a pressure point during negotiation. Present the pre-approval to the dealer's finance department — they can sometimes beat it to earn the financing business. Never negotiate based on monthly payment alone; always evaluate the total price of the vehicle and the total interest cost over the loan term separately.