Auto Loan Calculator
Estimate your monthly car payment, including trade-in, sales tax, and fees.
Result
How to Use This Calculator
Enter the vehicle price, down payment, trade-in value, APR, loan term in months, your state's sales tax percentage, and any additional fees.
How the Calculation Works
The amount financed is the vehicle price minus down payment and trade-in, plus estimated sales tax and fees. The standard amortizing loan formula then converts that into a monthly payment.
Formula
Amount Financed = Price − Down Payment − Trade-In + Sales Tax + Fees
M = P × [r(1+r)^n] / [(1+r)^n − 1]
Example Calculation
A $32,000 vehicle with $3,000 down, no trade-in, 7% sales tax, and $500 fees at 7.5% APR over 60 months finances about $31,740, for a monthly payment near $636.
Frequently Asked Questions
Does every state tax the price after trade-in credit?
No — rules vary by state. Confirm how your state calculates sales tax on a trade-in before relying on this estimate.
Related Tools
Disclaimer
Auto Loan Calculator: A Realistic Monthly Payment, Not a Dealership Estimate
"Auto loan calculator" and "car payment calculator" are searched heavily by anyone shopping for a vehicle, usually because dealership financing worksheets bundle so many numbers together — price, trade-in, tax, fees, APR — that it's genuinely hard to tell what you're actually paying for. This car loan calculator with trade-in separates those pieces out clearly: enter the vehicle price, your down payment, your trade-in value, your APR, loan term in months, your state's sales tax percentage, and any additional fees, and see exactly how each one moves your final monthly payment.
One detail that a lot of basic "monthly car payment calculator" tools skip is how sales tax interacts with a trade-in. This tool estimates tax on the vehicle price minus your trade-in value, which mirrors how many U.S. states actually calculate it — a trade-in reduces your taxable amount, not just your out-of-pocket cost. Because this rule varies from state to state, the calculator flags this assumption clearly so you can confirm it against your own state's rule before finalizing a budget.
Searches for "auto loan calculator with tax and fees" tend to spike alongside seasonal car-buying periods, when shoppers are comparing multiple vehicles or multiple financing offers at once. Because every input here is editable independently, this tool doubles as a quick side-by-side comparison engine — run the same loan term and APR against two different vehicle prices, or hold the vehicle price steady and compare a 48-month term against a 72-month term to see how much extra you'd pay in total interest for a lower monthly payment.
The result includes the amount financed, your estimated monthly payment, total interest paid over the life of the loan, and total loan cost — the same four numbers most "car finance calculator" searches are ultimately trying to find. As with any loan estimate, your actual APR will depend on your credit profile and the lender's own terms, and exact tax rules vary by state and sometimes by county, so treat this as a fast planning tool to walk into a dealership informed, not as a substitute for your final loan documents.
This tool is also useful for stress-testing a budget before you shop. Try lowering the down payment to see how much your monthly payment rises, or shortening the loan term to see how much total interest you'd save — trade-offs that are much easier to reason about with real numbers in front of you than by asking a dealership finance manager to run scenario after scenario on your behalf.