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A $25,000 auto loan at 6.5% APR for 60 months runs about $489 a month under CarCalcTools' amortization formula, before tax, fees, or a down payment. Change any field below for your own numbers.

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Interest rate (% APR)

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Monthly payment -

Total interest -

Total paid -

Payments -

Estimates only. Confirm exact terms with your lender or dealer.

By Jessica Martinez, Contributing Writer, Business & Finance · Updated 2026-07-02

How is an auto loan payment calculated?

Using the standard amortization formula, we turn your loan amount, APR and term into a monthly payment, then total the interest you’ll pay over the life of the loan. At the default $25,000, 6.5% APR and 60-month term above, that works out to $489 a month and about $4,349 in total interest. Stretch the same loan to 72 months and the payment drops but total interest rises; shorten it to 48 months and the reverse happens.

Rate matters: even a 1% lower APR saves hundreds over a typical car loan.

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FAQs

How is an auto loan payment calculated?

With the amortization formula using loan amount, monthly rate and number of payments.

How can I lower my payment?

A larger down payment, lower rate, or longer term lowers the monthly payment (longer terms cost more interest).

What APR should I expect?

It depends on credit, lender and term; check several lenders to compare.

Does this include tax?

No - this is the loan amount only. Use the car payment calculator for tax and trade-in.

Is this financial advice?

No - confirm exact terms with your lender.