Car Payment Calculator
Calculate monthly car payments, compare loan vs lease options, and view full amortization schedules. Free, private, and instant.
Results
Enter your details above and click Calculate to see your results.
How It Works
Enter Your Details
Input the vehicle price, down payment, trade-in value, interest rate, and loan term. Toggle sales tax on or off depending on your state. Switch between loan, lease, and affordability modes to compare options.
Get Instant Results
Click Calculate to see your monthly payment, total interest, total cost, and a complete month-by-month amortization schedule. The interactive chart shows exactly how your payments split between principal and interest over time.
Export and Compare
Download a PDF of your results for reference or to share with your lender. Save your inputs locally so you can return later without re-entering everything. Compare different scenarios by adjusting your numbers.
Why Use This Calculator
Accurate Estimates
Standard amortization formulas used by banks and lenders, with adjustable tax rates and trade-in values.
Instant Results
No sign-ups, no waiting. Enter your numbers and get a full payment breakdown in under a second.
100% Private
All calculations happen in your browser. No data is sent to any server. Your financial details stay on your device.
PDF Export
Download a clean, print-ready PDF of your results including the full amortization schedule and input summary.
Understanding Car Payments in 2025
Buying a car is one of the largest financial commitments most people make, second only to purchasing a home. Whether you are shopping for a brand-new sedan, a reliable used SUV, or considering leasing your next vehicle, understanding how monthly payments are calculated empowers you to negotiate better deals and avoid overpaying.
A car payment is determined by four primary factors: the loan amount (also called the principal), the annual percentage rate (APR), the loan term in months, and any applicable sales tax. The loan amount equals the vehicle price minus your down payment and trade-in value, plus any negative equity rolled over from a previous loan. Lenders use a standard amortization formula to split each monthly payment between principal repayment and interest charges. In the early months, a larger portion goes toward interest; as the balance shrinks, more of each payment reduces the principal.
How Interest Rates Affect Your Payment
Even a small difference in APR can significantly impact both your monthly payment and the total amount you pay over the life of the loan. For example, on a $30,000 loan over 60 months, the difference between a 5% APR and a 7% APR adds approximately $1,600 to your total interest cost. That is why it pays to shop around — credit unions, online lenders, and dealer financing all compete for your business, and pre-approval from multiple sources gives you leverage at the dealership.
Your credit score is the single biggest factor in determining the rate you qualify for. Borrowers with scores above 750 typically receive the best rates, often 2-3 percentage points lower than those with scores in the 600-650 range. Before applying for a car loan, check your credit report for errors, pay down existing balances, and avoid opening new credit accounts.
Loan Term: Shorter vs Longer
Loan terms for auto purchases typically range from 24 to 84 months. A shorter term means higher monthly payments but significantly less total interest. A 36-month loan on $25,000 at 6% APR costs about $2,370 in total interest, while stretching the same loan to 72 months increases total interest to roughly $4,800 — more than double. Longer terms also carry a higher risk of being "upside down" on the loan, meaning you owe more than the car is worth, which creates problems if you need to sell or trade in the vehicle.
Trade-In Value and Negative Equity
A trade-in reduces the amount you need to finance, directly lowering your monthly payment. However, if you still owe money on your current vehicle and its trade-in value is less than the outstanding loan balance, you have negative equity. This shortfall gets added to your new loan, increasing the total financed amount. Our calculator includes a negative equity toggle so you can see exactly how rolling over an existing balance affects your payment.
Leasing as an Alternative
Leasing a vehicle works differently from buying. Instead of financing the full purchase price, you pay for the vehicle's depreciation during the lease term plus a finance charge (expressed as a money factor). Lease payments are typically lower than loan payments for the same vehicle, but you do not build equity and must return the car at the end of the term unless you choose to buy it at the residual value. Use the Lease Payment tab above to compare lease costs against financing.
Sales Tax Considerations
Sales tax on vehicle purchases varies by state, ranging from 0% in states like Oregon and Montana to over 10% in some jurisdictions. Some states tax only the difference between the purchase price and your trade-in value, which can save hundreds or even thousands of dollars. Our calculator lets you toggle sales tax on or off and adjust the rate to match your local requirements.
This calculator provides estimates for informational purposes only. It is not financial advice. Always consult with a qualified financial professional before making significant financial decisions. Actual loan terms, rates, and costs will vary based on your creditworthiness, lender policies, and local regulations.