I am writing a spreadsheet with a semimonthly formula to identify a payperiod based vacation accrual . . . and I can't figure out the formula. The company pays on the 15th day and the last day of each month; and it hires employees throughout the year. This mean that I need to be able to use any of 24 starting pay period during the year. Hope this makes sense . . . and thank you for your help!