We show you how to use Excel to count days between two dates using the DAYS, DATEDIF, NETWORKDAYS, and TODAY functions, and Subtraction.

1] Add days directly If the expiry period is defined in days, you can calculate the expiry date by simply adding the number of days to the starting date using the + operator.

How to add a monthly balance in Excel As you’ve seen, a daily balance requires only a simple IF () function to match dates before returning the balance for each day.