Auto Loan Calculator
Enter your vehicle price, down payment, and trade-in value to see your exact monthly payment and the true total cost of buying the car on credit.
🚗 What is an Auto Loan Calculator?
An auto loan calculator computes your monthly car payment, total interest, and the true cost of buying a vehicle on credit. It factors in your vehicle price, down payment, trade-in equity, interest rate, and loan term to give you the complete financial picture before you visit a dealership or sign a financing agreement. Understanding these numbers in advance puts you in a much stronger negotiating position.
This calculator covers three common car-buying scenarios. First, you are buying a new or used car and want to know the monthly payment for a specific price and rate. Second, you are trading in your current vehicle and want to see how the trade-in equity reduces your financed amount and total interest. Third, you have two loan offers from different lenders and want to compare them side by side on monthly payment, total interest, and total cost. Each scenario requires a different set of inputs, all of which are covered by the two modes in this calculator.
A common misconception is that the monthly payment is the primary number to optimize. In reality, a lower monthly payment achieved by extending the loan term from 48 to 72 months often adds more than $2,000 in total interest on a typical loan. The true cost of the vehicle, which includes everything you spend from down payment through the last loan payment, is the more honest comparison metric. This calculator surfaces that number in the "True Vehicle Cost" result so you can compare it against what the car is actually worth.
The Loan Comparison mode is particularly useful when a dealer offers 0% or 1.9% financing in exchange for giving up a manufacturer cash rebate. By comparing the rebate scenario (lower price, higher rate from a bank) against the special financing scenario (full price, 0% or low rate), you can quickly see which saves more money in total. Use the calculator before any negotiation so the numbers are already clear in your mind.
📐 Formula
📖 How to Use This Calculator
Steps
💡 Example Calculations
Example 1 - Standard New Car Purchase
$35,000 vehicle, $5,000 down, $0 trade-in, 6.5% rate, 60 months
Example 2 - With Trade-In, Shorter Term
$28,000 used car, $3,000 down, $7,000 trade-in, 8.0% rate, 48 months
Example 3 - Loan Comparison: Bank vs Dealer
$30,000 loan, Bank at 6.5% for 60 months vs Dealer at 8.9% for 72 months
❓ Frequently Asked Questions
🔗 Related Calculators
How do I calculate my monthly car loan payment?
The monthly car loan payment is calculated using the standard EMI formula: M equals P times r times (1+r)^n divided by ((1+r)^n minus 1), where P is the loan amount (vehicle price minus down payment and trade-in), r is the monthly interest rate (annual rate divided by 12), and n is the number of months. A $25,000 loan at 6.5% for 60 months produces a monthly payment of approximately $489.
What is a good interest rate for a car loan in 2025?
Average new car loan rates in the US were approximately 6.5 to 8.5% in 2025 for borrowers with good credit. Used car loan rates were typically 1 to 3 percentage points higher. Borrowers with excellent credit (720+) qualify for the lowest available rates. Credit unions often offer 0.5 to 1.5 percentage points below bank rates. Manufacturer promotional rates (0% to 2.9%) are available periodically but require top-tier credit.
Should I make a larger down payment on a car loan?
A larger down payment reduces your principal, which lowers both your monthly payment and total interest paid. It also protects you from being upside-down on the loan during the first few years when depreciation is fastest. The standard recommendation is 20% down for a new car and 10% for a used car. Putting down less is acceptable but expect a slightly higher interest rate and more risk if the car needs to be sold or totaled early.
Is it better to get a shorter or longer car loan term?
A shorter term (24 to 36 months) costs much less in total interest but requires a higher monthly payment. A longer term (60 to 84 months) lowers the monthly payment but significantly increases total interest. On a $30,000 loan at 7%, extending from 48 to 72 months saves $223 per month but adds $2,340 in total interest. Most financial advisors recommend the shortest term that fits your budget comfortably.
How does a trade-in reduce my car loan?
Your trade-in value is subtracted from the purchase price before the loan is calculated, directly reducing the principal you borrow. If you buy a $32,000 car, put $4,000 down, and have a $5,000 trade-in, your loan principal is only $23,000. This saves interest on the full $5,000 difference for the entire loan term. Getting an independent appraisal ensures you receive fair market value for your trade.
What is the difference between total paid and true cost of vehicle?
Total paid refers to the sum of all loan payments (principal plus interest). True cost of vehicle adds the down payment and trade-in equity you brought to the deal, giving the full economic outlay for the vehicle. If you put $5,000 down, have a $3,000 trade-in, and pay $28,500 in loan payments, the true vehicle cost is $36,500. This is the figure to compare against what the car is worth to judge the total financial decision.
How do I compare two car loan offers?
Use the Loan Comparison mode on this calculator. Enter the same loan amount for both offers, then set the rate and term for each. The calculator shows monthly payment, total interest, and total paid for both, then identifies which saves more in total. A lower monthly payment is not always the better deal if it comes from a longer term that adds thousands in interest.
Can I get a car loan with bad credit?
Yes, most lenders offer car loans to borrowers with poor credit (580 or below), but the interest rate will be significantly higher, often 12 to 24% for subprime borrowers. At 18% on a $20,000 loan over 60 months, total interest is about $10,200, compared to $3,300 at 6.5%. If your credit score is below 620, consider waiting 6 to 12 months to improve your score before financing a vehicle.
What is GAP insurance and do I need it on a car loan?
GAP (Guaranteed Asset Protection) insurance covers the difference between what you owe on your auto loan and the actual cash value of the car if it is totaled or stolen. New cars depreciate 15 to 25% in the first year. If you financed 90 to 100% of the purchase price, your loan balance can easily exceed the car's value in year 1 and 2. GAP insurance costs $20 to $40 per year and is usually worth it if your down payment was under 20%.
Should I pay off my car loan early?
Paying off a car loan early saves interest and frees up monthly cash flow, but first check for prepayment penalties. Most modern auto loans have no prepayment penalty. If your loan rate is 7% and you have no other higher-rate debt, paying it off early gives you a guaranteed 7% return on the prepaid amount. If you carry credit card debt at 20%+, pay that off first. The Auto Loan calculator shows your total interest to quantify what early payoff would save.
What monthly car payment can I afford?
Most financial guidelines recommend spending no more than 10 to 15% of your monthly take-home pay on the car payment, with total auto costs (payment, insurance, fuel, maintenance) below 20%. On a $5,000 monthly take-home, that means a car payment of $500 to $750. Work backward from that payment limit using the EMI formula to find the maximum vehicle price you can afford at your target loan term.