How the Loan & Auto Calculator works

How Tallivo computes loan payments and, in auto mode, the amount financed from price, tax, fees, and trade-in.

The formula

M = P · [ r(1 + r)ⁿ ] / [ (1 + r)ⁿ − 1 ]

Personal-loan mode amortizes your loan amount directly at the monthly rate (APR ÷ 12) over the term in months.
Auto mode computes the amount financed = vehicle price + sales tax + fees − down payment − trade-in.
Sales tax is applied to the price after subtracting the trade-in credit, as most U.S. states do.
Total interest = total of all payments − amount financed.

A fixed interest rate and equal monthly payments.
Sales-tax treatment of trade-ins varies by state; a few states tax the full price.
Excludes gap insurance, extended warranties, and dealer add-ons unless you include them in fees.

Formula reviewed 2025. Figures are planning estimates, not a loan offer — this is not financial advice.