Show a customer what they'll earn parking money in their savings account at a promo rate for a set number of days. Interest accrues daily and is paid at each month-end, then compounds.
Simple interest accrued daily at rate ÷ 365, credited to the balance at each calendar month-end and compounding thereafter; interest accrued since the last posting is included at maturity. Figures are estimates for illustration — actual posting dates and rounding may vary by institution. Not financial advice.