Loading Legacy
Calculate your car loan payment with sales tax, trade-in, fees, and total interest.
Auto Loan Calculator computes your monthly car payment using the standard PMT formula, including sales tax rolled into principal, trade-in value, and total interest over the loan term.
See your real monthly car payment with sales tax, trade-in value, registration fees, and total interest over the loan term.
Enter the vehicle price and your down payment.
Add trade-in value, sales tax %, and fees.
Pick a loan term to see monthly payment and total cost.
Monthly payment uses the standard PMT annuity formula: P × r × (1+r)^n / ((1+r)^n − 1), where r = monthly rate and n = term months. Sales tax is added to the vehicle price before subtracting down payment and trade-in. Total interest = (monthly payment × months) − principal financed.
A 72-month loan lowers monthly payments but dramatically increases interest. The 20/4/10 rule suggests no more than 48 months to avoid being upside down (owing more than the car's value).
In most US states, yes — sales tax can be rolled into the loan amount. This calculator includes the tax in the financed principal by default.
Trade-in value reduces the financed principal dollar-for-dollar, and in most states also reduces the sales tax basis (you only pay tax on the difference).
As of mid-2026, new car loan APRs average ~7.0–8.0% for prime credit, with subprime borrowers seeing 12–18%. Used car APRs run 1–2 percentage points higher.
Calculate your monthly EMI and total interest for any loan.
Calculate your front-end and back-end DTI ratio for mortgage qualification.
Pay off multiple credit cards using avalanche or snowball method.