Car Loan Calculator
Calculate your estimated auto loan payment, total interest, and total cost based on the vehicle price, down payment, trade-in, sales tax, interest rate, and loan term.
Car Loan Calculator
Customize your vehicle financing inputs below to estimate payments instantly.
Amortization Schedule
| # | Payment | Principal | Interest | Remaining Balance |
|---|
Disclaimer: This Car Loan Calculator provides estimates based on standard fixed-rate amortization formulas. Actual auto loan payments may differ based on dealer documentation fees, sales tax district additions, lender compounding conventions, and manufacturer rebates. Always review the truth-in-lending disclosure with your lender.
How to Use the Car Loan Calculator
Our free Car Loan Calculator is built to give you total financial clarity before you step into a car dealership. Enter your vehicle purchase details, click Calculate Car Loan, and view your estimated installment payments and full loan breakdown instantly.
Vehicle Price
Enter the agreed sticker price or negotiated purchase price of the vehicle before sales tax, dealer fees, or down payments.
Down Payment
Enter the cash amount you plan to pay upfront. Putting money down lowers your borrowing cost and reduces interest charges.
Trade-In Value
Enter the agreed trade-in value from your old vehicle. Your trade-in acts like cash toward the purchase, reducing your net amount financed.
Sales Tax & Fees
Enter your local sales tax percentage (e.g., 6.5%) and estimated dealer fees (doc fees, registration, and title charges).
Interest Rate (APR)
Enter the annual interest rate offered by your bank, credit union, or dealer financing arm. 0% APR is fully supported.
Term & Frequency
Select your loan duration in Years or Months, and choose whether you will pay Monthly (12/yr), Biweekly (26/yr), or Weekly (52/yr).
How Car Loans and Auto Financing Work
An auto loan is a secured installment loan where the vehicle itself serves as collateral. The lender pays the dealership for the car, and you agree to repay the lender in regular installments plus interest over a fixed period.
Secured by the Vehicle
Because the lender holds a lien on the car's title, interest rates on auto loans are typically lower than unsecured personal loans or credit cards.
Vehicle Depreciation
Cars lose value over time, especially in the first 3 years. Borrowing 100% with no down payment risks being “upside-down” on your loan.
Taxes & Dealership Fees
Car purchases carry government title fees, state sales tax, and dealer documentation fees that are rolled into the loan or paid upfront.
Trade-In Credit Potential
Trading in your existing vehicle reduces the purchase price directly and often provides state sales tax credits on the difference.
How Are Car Loan Payments Calculated?
Automotive lenders use the standard fixed-rate amortizing loan formula to determine the regular periodic payment required to retire the loan balance.
M: The periodic payment amount (e.g. monthly installment)
P: Net Amount Financed (Vehicle Price + Sales Tax + Fees − Down Payment − Trade-In)
r: Periodic interest rate (Annual Rate ÷ Payments Per Year ÷ 100)
n: Total number of scheduled payments across the loan duration
Car Loan Term Comparison: Monthly Payment vs. Total Interest
The table below demonstrates how loan term length affects the monthly payment and total finance charges on a $25,000 car loan at 7.5% APR:
| Loan Term | Payments | Monthly Payment | Total Interest Paid | Total Repayment |
|---|---|---|---|---|
| 36 Months (3 Years) | 36 | $777.67 | $2,996.12 | $27,996.12 |
| 48 Months (4 Years) | 48 | $604.47 | $4,014.56 | $29,014.56 |
| 60 Months (5 Years) — Common | 60 | $500.95 | $5,057.00 | $30,057.00 |
| 72 Months (6 Years) | 72 | $432.32 | $6,127.04 | $31,127.04 |
| 84 Months (7 Years) | 84 | $383.65 | $7,226.60 | $32,226.60 |
Worked Car Loan Example
Example: Purchasing a $30,000 Car with Trade-In & Down Payment
| Vehicle Purchase Price | $30,000.00 |
| Sales Tax (6.5% on $30,000) | +$1,950.00 |
| Dealer & Registration Fees | +$1,000.00 |
| Total Cost Before Credits | $32,950.00 |
| Cash Down Payment | −$5,000.00 |
| Trade-In Allowance | −$3,000.00 |
| Net Amount Financed (P) | $24,950.00 |
| Annual Interest Rate (APR) | 7.5% |
| Loan Term | 5 Years (60 monthly payments) |
| Estimated Monthly Payment | $499.95 |
| Total Interest Paid Over 5 Years | $5,046.82 |
| Total Overall Out-of-Pocket | $37,996.82 |
Auto Financing Tips for Car Buyers
- Get Pre-Approved First: Secure a pre-approved auto loan from a credit union or bank before dealership shopping to negotiate better.
- Negotiate Out-the-Door Price: Negotiate the vehicle's full price first instead of focusing on monthly payments.
- Aim for 20% Down: Putting 20% down prevents negative equity (“gap”) where you owe more than the car is worth.
- Follow the 20/4/10 Rule: 20% down payment, no more than 4 years financing, and total car expenses under 10% of monthly income.
- Watch Out for Dealer Add-Ons: Extended warranties, tire protection packages, and VIN etching can easily add thousands to your loan.
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Frequently Asked Questions
M = P × [r(1+r)^n] ÷ [(1+r)^n − 1]. Here, P is the amount financed, r is the monthly interest rate (APR ÷ 12), and n is the total number of monthly payments.