Start with the purchase
Enter the negotiated vehicle price and cash down payment. Include taxes and fees once, either in the vehicle price or in the optional fields.
G-Force Funding tools / Vehicle financing
Plan your car payment before you shop.
See how price, trade-in equity and loan length affect your payment. Build a fuller estimate with taxes and fees, compare terms, and explore the impact of paying extra.
Your auto loan details
U.S. fixed-rate estimate · USD. Starting values are examples, not current loan offers.
Use the loan interest rate, not APR. APR can include financing charges.
Choose a whole number from 1 to 120.
Trade-in and existing loan
Use the lender’s payoff quote. Any balance above the trade-in value increases the estimated new loan; financing it requires lender approval.
Sales tax and fees
Tax rules vary by location. Enable this only if your purchase qualifies for a full trade-in tax credit. The estimate excludes tax on fees. For an out-the-door price, use 0 for taxes and fees already included.
Extra monthly payments
Applied from the first payment. Confirm how your lender applies extra principal and whether any prepayment charge applies.
No signup required. Calculations run in your browser.
Estimated monthly loan payment
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- Amount financed
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- Total interest
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- Total loan payments
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- Estimated payoff
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Monthly payment excludes extra principal. Total interest and payoff reflect extra payments when entered.
Estimated sales tax—
Net trade-in equity—
Cash paid upfront—
Cash upfront + loan payments—
Cash totals exclude the value of your trade-in, insurance, fuel, maintenance and other ongoing costs.
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Compare loan lengths
Same financed amount and interest rate, with no extra payments. Actual offers may have different rates for different terms.
| Term | Monthly payment | Total interest | Total loan payments |
|---|
Your repayment schedule
Monthly principal, interest and remaining balance, including extra payments.
| Payment month | Payment | Principal | Interest | Balance |
|---|
Look at the full financing picture
Account for the old loan
Trade-in value minus its payoff balance is your equity. If that is negative, rolling the difference into a new loan increases the amount you borrow.
Compare payment and cost
At the same positive interest rate, a longer term generally reduces the monthly payment and increases total interest. Review both figures when comparing offers.
Auto loan calculator questions
How is the auto loan payment calculated?
The financed amount is vehicle price minus cash down payment minus trade-in value plus the trade-in payoff balance, plus taxes and fees if financed. The monthly payment uses P × r ÷ [1 − (1 + r)−n], where P is principal, r is the annual interest rate divided by 1,200 and n is the number of payments. At 0% interest, principal is divided by the loan term.
How does this handle negative equity?
When the payoff balance is higher than the trade-in value, the difference is added to the estimated amount financed. This is a calculation assumption, not confirmation that a lender will finance that balance.
Does the tax estimate match my state’s rules?
Not necessarily. This tool applies the rate you enter to the vehicle price, or to price minus trade-in value if you select the tax-credit option. It does not model local caps, taxable fees, rebates, exemptions or partial credits. Confirm the final tax amount with your dealer or relevant tax authority.
Should I enter APR or the interest rate?
Use the contractual interest rate for this payment estimate. APR includes certain credit costs and is useful for comparing offers, but can differ from the interest rate used to calculate payments.
Why might my lender’s schedule differ?
This tool assumes equal monthly intervals, a fixed rate, interest rounded to cents each month and no missed payments. Many auto loans calculate interest daily, so payment dates can change the results. The final payment is adjusted to clear the balance. Leases, balloon payments and precomputed-interest loans are not modeled.
Explore more planning tools
Use our Mortgage Calculator for a home purchase, or browse all G-Force Funding tools and Finance Guides and Resources.
Educational estimates only; not a credit decision or loan offer. For more background, see the Consumer Financial Protection Bureau’s guidance on comparing auto loan offers and trade-ins with an existing loan.