There should be a date on the package as well as telling you to keep refrigerated. There may be a date telling you to use by (Example) July 8, 2008. If you can freeze it then try that when not using the cookie dough. I would say not after a week. Because both homemade cookie dough as well as package dough contain dairy products in thier mixtures this is why I would suggest not to much longer that a week of being refrigerated.
