Crimson Cash is a debit card system, accessed through your Harvard ID, for on-campus services and a select but growing number of off-campus services. Crimson Cash is discretionary—you may use it or not as you wish, and you determine how much money you add to Crimson Cash. Crimson Cash has no service charges and does not expire as long as you have a valid Harvard ID. For more information, go to http://www.cash.harvard.edu/.