Auto Loan Calculator
Compare loan offers from different lenders side by side to see which one actually costs less.
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In two sentences: An auto loan calculator estimates your monthly car payment based on the vehicle price, down payment, interest rate, and loan term — and in 2026, average rates run about 6.4% for new cars versus 11.4% for used cars, nearly double. This guide breaks down the formula, current rate data by credit score, and worked examples so you can budget accurately before you visit a dealership.
What Is an Auto Loan Calculator?
An auto loan calculator estimates your fixed monthly car payment using the vehicle price, your down payment or trade-in value, your interest rate, and your loan term. Because new and used vehicles carry meaningfully different average rates, and because dealer financing often differs from bank or credit union rates, running your own numbers before negotiating gives you real leverage at the dealership.
The Auto Loan Payment Formula
M = P × [ r(1 + r)^n ] / [ (1 + r)^n − 1 ]
M = monthly payment
P = amount financed (vehicle price minus down payment/trade-in)
r = monthly interest rate (annual rate ÷ 12)
n = loan term in months
Current Auto Loan Interest Rates (2026)
<cite index=”11-1″>The average car loan interest rate is 6.39% for new cars and 11.43% for used cars, according to Experian’s State of the Automotive Finance Market report from Q1 2026</cite>. That nearly 2x gap exists because used vehicles represent more risk and less predictable resale value to lenders than new ones.
Rates by credit score tier
<cite index=”19-1″>Experian data breaks down average rates precisely by credit tier: super-prime borrowers (781–850) average 4.66% on new cars and 7.70% on used; prime borrowers (661–780) average 6.27% new and 9.98% used; nonprime (601–660) average 9.57% new and 14.49% used; and subprime (501–600) borrowers average 13.17% new and 19.42% used</cite>.
Typical loan terms and payments
<cite index=”11-1″>New car loans carry an average repayment term around 69 months, while used car loans average around 67 months</cite>. <cite index=”19-1″>The average monthly car payment reached $767 for new cars and $537 for used cars in Q4 2025, according to Experian</cite>, driven partly by <cite index=”19-1″>average new-car loan amounts of $42,582</cite>.
Worked Examples
Example 1: A new car at the average rate
A $35,000 new car loan at 6.39% APR over 60 months:
Monthly rate = 0.0639 ÷ 12 = 0.005325
n = 60 payments
Monthly payment ≈ $684
Total interest paid ≈ $6,040
Example 2: The same car, super-prime credit
The same $35,000 loan at 4.66% APR (super-prime tier):
Monthly payment ≈ $655
Total interest paid ≈ $4,300
Just 1.7 percentage points of rate difference saves roughly $29/month and about $1,740 in total interest over the loan.
Example 3: A used car loan
<cite index=”14-1″>Average used car interest rates range from 6.82% to 21.58% depending on credit score, with the overall mean around 11.87%</cite>. On a $20,000 used car loan at 11.87% APR over 60 months:
Monthly payment ≈ $443
Total interest paid ≈ $6,580
Notice this smaller loan amount ($20,000 vs. $35,000) still produces higher total interest as a percentage of principal than the new-car example, purely because of the higher used-car rate.
Step-by-Step: How to Use an Auto Loan Calculator
- Enter the vehicle price and subtract your down payment and any trade-in value to get your amount financed.
- Enter an interest rate based on your credit tier and whether you’re buying new or used — use the ranges above as a starting benchmark.
- Enter your loan term — 60 or 72 months are the most common.
- Review your monthly payment and total interest, and try a shorter term to see the savings.
- Get pre-approved by a bank or credit union before visiting the dealership, since <cite index=”16-1″>credit unions consistently offer rates 1–2% lower than banks and 2–4% lower than dealer financing</cite>.
Auto Loan Financing: Direct vs. Dealer
- Direct financing — <cite index=”12-1″>applying directly with a bank, credit union, or online lender, which lets you get pre-approved with multiple lenders to improve your chances of securing the best deal</cite>.
- Indirect (dealer) financing — <cite index=”12-1″>the dealer arranges financing on your behalf, typically shopping your application to roughly five lenders and presenting one offer</cite>. This can be convenient but <cite index=”16-1″>dealer markup between the lender’s buy rate and your quoted rate averages $1,500–$3,000 over the life of a loan</cite>.
<cite index=”16-1″>Every 1% reduction in your APR saves roughly $500–$1,000 over a 60-month loan on a $25,000 vehicle</cite> — a strong incentive to shop your rate before signing at the dealership.
Using an Auto Loan Calculator to Negotiate at the Dealership
The single best use of an auto loan calculator isn’t just estimating your payment at home — it’s walking into the dealership already knowing your numbers, so a salesperson can’t steer the conversation purely around a monthly payment target. A common dealership tactic is to ask “what payment are you looking for” and then stretch the term or adjust the price to hit that number while the total cost quietly balloons. An auto loan calculator protects you from this by letting you see the full picture — price, rate, term, and total interest — before you ever discuss a monthly number out loud.
A practical auto loan calculator workflow
- Get pre-approved by your bank or credit union first, and run that offer through an auto loan calculator to know your baseline payment and total cost.
- At the dealership, negotiate the vehicle price first, separately from any financing discussion.
- Once the price is settled, run the dealer’s financing offer through the same auto loan calculator and compare it directly against your pre-approval.
- Take whichever option produces the lower total cost — not just the lower monthly payment — using the auto loan calculator’s total interest figure as your real tiebreaker.
This approach keeps price negotiation and financing negotiation separate, which consistently produces better outcomes than negotiating both at once.
Frequently Asked Questions
<cite index=”11-1″>New car loan interest rates are generally lower than used car loan rates</cite>, largely because new vehicles hold more predictable resale value and represent less risk to the lender if the loan defaults.
It depends on your goals. <cite index=”11-1″>The average lease payment is $619, compared to $770 for an average new car loan payment</cite>, but leasing means you never build equity in the vehicle and typically face mileage limits.
Yes — a pre-approval gives you a baseline rate to negotiate against, and lets you compare it directly to whatever financing the dealership offers.
Yes. <cite index=”17-1″>Refinancing makes the most sense if your credit score has improved since the original loan, or if market rates have fallen since you financed</cite>, though refinance rates typically run 0.5–1.5% higher than purchase rates for the same credit tier.
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In short, an auto loan calculator is most valuable when paired with current rate data for your specific credit tier and vehicle type, since the new-versus-used and credit-score spreads shown above can shift your total cost by thousands of dollars on an identical vehicle price.
Note: This calculator and article are provided for general educational and informational purposes only and do not constitute financial advice. Auto loan rates vary by lender, credit profile, vehicle age, and market conditions, and change frequently. Always confirm current rates directly with lenders before financing a vehicle.