Car Loan Calculator
Calculate your monthly car loan payments, total interest, and total loan cost. See a complete amortization schedule showing exactly how each payment is applied to principal and interest over the life of your auto loan.
How Car Loan Calculations Work
Car loans use simple interest amortization. Each monthly payment is divided between interest charges and principal reduction. Early in the loan, a larger portion goes toward interest; later, more goes toward principal. This is because interest is calculated on the outstanding balance, which decreases over time.
The formula used to calculate your monthly payment is:
M = P × [ r(1 + r)n ] / [ (1 + r)n - 1 ]
Where:
M = Monthly payment
P = Principal (loan amount)
r = Monthly interest rate (Annual rate ÷ 12)
n = Total number of payments (loan term in months)
For example: A $25,000 loan at 6.5% APR for 60 months:
- Monthly rate = 0.065 ÷ 12 = 0.0054167
- Monthly Payment = $25,000 × [0.0054167(1.0054167)^60] / [(1.0054167)^60 − 1] = $489.15
- Total Interest = ($489.15 × 60) − $25,000 = $4,349
- Total Cost = $29,349
Smart Car Loan Strategies
- Make a Larger Down Payment: A 20% down payment reduces your loan amount and saves thousands in interest.
- Choose Shorter Loan Terms: While monthly payments are higher, 48-month loans save significantly vs 72-month loans. Example on $25,000 at 6.5%: 48 months ($593/month, $3,464 interest) vs 72 months ($421/month, $5,311 interest) — save $1,847 in interest!
- Pay Extra Each Month: Adding just $50 extra per month can shorten your loan by months and save hundreds in interest.
- Improve Your Credit Score: Before applying, check your credit. A 700+ score qualifies for the best rates (4-6% vs 10-15% for lower scores).
❓ Car Loan Calculator FAQ
What credit score is needed for the best car loan rates?
• 781-850 (Super Prime): 4-5% APR • 661-780 (Prime): 5-7% APR • 601-660 (Near Prime): 7-10% APR • 501-600 (Subprime): 10-15% APR • Below 500: 15%+ APR
Should I get pre-approved before visiting a dealership?
Absolutely! Pre-approval from your bank or credit union gives you negotiating power. Dealers often mark up interest rates by 2-3% as profit. Always compare our calculator results with dealer offers.
How much car can I afford?
The 20/4/10 rule is a good guideline: • 20% down payment • 4-year maximum loan term • Monthly payment ≤ 10% of gross income. Also ensure total vehicle expenses (payment + insurance + gas + maintenance) stay under 15-20% of take-home pay.
What's the difference between APR and interest rate?
APR (Annual Percentage Rate) includes interest + fees. The interest rate is the base cost of borrowing. Always compare APR when shopping for loans, as it reflects the true cost.
Can I pay off my car loan early?
Most car loans have no prepayment penalties. Paying extra each month, even $25-50, reduces principal faster and saves significant interest. Our amortization schedule shows the impact of extra payments.
What's the difference between new and used car loan rates?
New cars typically have lower interest rates (2-5% for well-qualified buyers). Used cars have higher rates (4-9%+) due to increased risk. However, used cars are cheaper to begin with, so total interest may still be lower.
How does the loan term affect my monthly payment?
A longer loan term lowers your monthly payment but increases the total interest you pay. A shorter term means higher monthly payments but less interest overall. Use this calculator to compare different terms.
What is amortization?
Amortization is the process of paying off a loan over time through regular payments. Each payment covers both interest and principal. The amortization schedule shows how much of each payment goes toward interest vs. principal.
How does a down payment affect my loan?
A larger down payment reduces the amount you need to finance, which lowers your monthly payment and total interest paid. It also helps you avoid being upside down on your loan.
What is negative equity on a car loan?
Negative equity (being upside down) occurs when you owe more on your car loan than the car is worth. This can happen with small down payments, long loan terms, or rapid depreciation.
How does the calculator handle sales tax?
The calculator adds sales tax to the vehicle price before calculating the loan. You can enter your local tax rate in the advanced options. The tax amount is included in the total loan amount.
What is the difference between simple interest and compound interest?
Car loans use simple interest, which is calculated only on the principal balance. Compound interest is calculated on the principal plus accumulated interest. Simple interest is more favorable for borrowers.
How do I calculate my monthly car payment?
Use the formula: M = P × [r(1+r)^n] / [(1+r)^n - 1]. This calculator does the math for you — just enter your loan details and click "Calculate Payment."
What is a good interest rate for a car loan in 2025?
Good rates vary by credit score. For excellent credit (750+), rates are typically 4-6% for new cars and 5-7% for used cars. With good credit (700+), expect 5-7% for new and 6-9% for used.
Should I finance through the dealership or my bank?
Compare both. Banks and credit unions often offer competitive rates, especially if you have a relationship with them. Dealerships may offer promotional rates but can mark up the APR. Always get pre-approved before negotiating.
How does making extra payments affect my loan?
Extra payments reduce your principal balance faster, which lowers the total interest you pay and can shorten your loan term. Even small extra payments ($25-50/month) can save hundreds in interest over the life of the loan.
What is the total cost of a car loan?
The total cost includes the loan amount plus all interest paid over the life of the loan. This calculator shows the total cost so you can see the true price of financing.
Can I use this calculator for lease payments?
This calculator is designed for loan payments (purchasing a vehicle). Lease calculations are different and involve residual value, money factor, and other factors. Use our Lease Calculator for lease estimates.
How accurate is this car loan calculator?
This calculator provides accurate results based on the standard loan formula. However, actual loan terms may vary by lender. Use this as a planning tool to understand your options before applying for a loan.