Loan

Inputs

Loan start date Principal (amount borrowed) APR (annual interest %) Payment amount (monthly) Payment day-of-month Use 1–28 to avoid invalid dates (e.g. Feb 30). Term (months)

Roll payment date backward if weekend (Sat/Sun) Post interest on the 1st of each month (calendar date)

Optional: extra payments (CSV lines)

Lines like: 2025-09-09,501.09
(No weekend shifting for extras.)