Principal × APR ÷ 12

Loan principal and annual APR—monthly interest-only payment (no principal paydown).

Principal Annual APR %

FAQ

Monthly vs annual interest-only cash flow?

Monthly = principal × (APR% ÷ 100) ÷ 12; the second line shows principal × APR% ÷ 100 per year. Principal must be positive; APR is allowed to be 0 (zero payments). No amortization of principal.

Does the decimal separator matter?

This calculator uses plain decimal numbers. If a result looks wrong, check whether you used a comma instead of a dot (or vice versa) where the field expects one.