Auto Loan Calculator
Estimate your monthly car payments with tax, title, and trade-in
How to Use This Auto Loan Calculator
- Enter the negotiated vehicle price
- Input your down payment amount
- Enter any trade-in value (this reduces your taxable amount in most states)
- Specify your state's sales tax rate
- Input the loan interest rate (check current rates - average is 7-9% in 2026)
- Select your loan term in months (36, 48, 60, 72, or 84)
- Click Calculate to see your monthly payment and total costs
Example: A $35,000 vehicle with $5,000 down, no trade-in, 7% tax, 6.5% interest for 60 months: Loan amount is $32,100 (price plus $2,100 tax). Monthly payment is $628. Total interest paid is $5,550, making total cost $37,650.
Tip: Shorter loan terms have higher monthly payments but save thousands in interest. A 48-month term instead of 72-month on a $30,000 loan at 7% saves over $2,500 in interest.
Why Use a Auto Loan Calculator?
An auto loan calculator helps you understand the true cost of vehicle financing and make informed decisions before you negotiate.
- Calculate monthly payments to ensure they fit your budget
- Compare total costs across different loan terms
- Determine how much to put down to reach a target payment
- Understand how trade-in value affects your loan amount
- See the impact of different interest rates on total cost
- Decide between shorter terms (lower total cost) and longer terms (lower payments)
Understanding Your Results
Your monthly payment is just one metric. Evaluate total interest and cost to make the best financing decision.
| Result | Meaning | Action |
|---|---|---|
| Payment < 10% of monthly income | Comfortable range | Payment should be manageable with room for other expenses |
| Payment 10-15% of monthly income | Stretching budget | Consider larger down payment or less expensive vehicle |
| Payment > 15% of monthly income | Financial strain likely | Vehicle may be too expensive; look at alternatives |
| Interest > 20% of principal | High financing cost | Consider shorter term, larger down payment, or better rate |
Meaning: Comfortable range
Action: Payment should be manageable with room for other expenses
Meaning: Stretching budget
Action: Consider larger down payment or less expensive vehicle
Meaning: Financial strain likely
Action: Vehicle may be too expensive; look at alternatives
Meaning: High financing cost
Action: Consider shorter term, larger down payment, or better rate
Note: Total vehicle costs should stay under 20% of gross monthly income including payment, insurance, gas, and maintenance.
About Auto Loan Calculator
Formula
M = P × [r(1+r)^n] / [(1+r)^n - 1] Where M is monthly payment, P is loan principal (vehicle price + tax - down payment - trade-in), r is monthly interest rate (annual rate / 12), and n is number of monthly payments.
Current Standards: Average new car loan rates in 2026: 750+ credit score: 5.5-7%, 700-749: 7-9%, 650-699: 10-13%, below 650: 14-20%. Longer terms (72-84 months) often carry higher rates.
Frequently Asked Questions
Should I take a longer loan term for lower payments?
Longer terms reduce monthly payments but significantly increase total interest. A $30,000 loan at 7%: 48 months = $718/month, $4,450 total interest. 72 months = $513/month, $6,950 total interest. That lower payment costs $2,500 extra. Choose the shortest term you can comfortably afford.
How does my credit score affect my auto loan rate?
Credit score is the primary factor in your interest rate. Someone with 800 credit might get 5.5% while someone with 650 gets 12%. On a $25,000 loan over 60 months, that difference means $95/month more and $5,700 additional total cost. Improving your credit before buying can save thousands.
Should I finance through the dealer or my bank?
Get pre-approved by your bank or credit union first, then see if the dealer can beat it. Dealers sometimes offer manufacturer-subsidized rates (especially 0% promotions) that banks can't match. But dealer financing also sometimes has higher rates with kickbacks. Having a pre-approval gives you negotiating leverage.
Is it better to make a large down payment?
Yes, generally. A larger down payment means smaller loan, less interest, lower monthly payments, and reduced risk of being 'underwater' (owing more than the car is worth). Aim for at least 20% down on new cars, 10% on used. This also often qualifies you for better interest rates.
How does trade-in value affect my loan?
Trade-in value reduces your loan amount and, in most states, your taxable amount. A $20,000 car with $5,000 trade-in means you finance $15,000 and only pay tax on $15,000 (saving $350 at 7% tax). However, you may get more selling privately than trading in.