Question 1

How is a monthly auto loan payment calculated?

Accepted Answer

A monthly auto loan payment is calculated using the formula: M = P[r(1+r)^n] / [(1+r)^n – 1], where P is the loan amount (vehicle price minus down payment and trade-in, plus sales tax), r is the monthly interest rate, and n is the number of monthly payments.

Question 2

Does sales tax affect my auto loan amount?

Accepted Answer

Yes. In most states, sales tax is calculated on the vehicle price minus the trade-in value, and the tax amount is added to the loan balance if not paid upfront. This increases your total loan amount and the interest you pay over the life of the loan.

Question 3

Should I choose a longer or shorter auto loan term?

Accepted Answer

A shorter loan term (36–48 months) means higher monthly payments but significantly less total interest paid. A longer term (60–84 months) lowers your monthly payment but increases total cost. Use this calculator to compare terms and find the right balance for your budget.

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