# Excel Formula utilizing a start date & updates every 7 d

#### BlueJaguarXJS

##### New Member
I'm having trouble creating an excel formula for our HR Department. They want their spreadsheet to have a start date and every seven days (week) it will add .89 the the original number in the start date cell. IF anybody could steer me in the right direction? I would greatly appreciate it. Thanks, Will

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Welcome to the board!

=B1+0.89*INT((TODAY()-A1)/7)

Where A1 is the start date and B1 is the initial amount to which the 0.89's are added.

Hi welcome to the board.

Your request isn't particularly clear to me.

You have a date in a cell (call it A1) and you want to increment a value (call it B1) by 0.89 every 7 days from that date? If so then perhaps

=B1+INT((TODAY()-A1)/7)*0.89

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