To apply to Purdue, use the online application and meet any posted deadlines. Deadlines vary based on the academic term for which you are applying (fall, spring, summer) and student type (freshman or transfer, for example). In addition, some individual majors have specific deadlines. An application is complete when all required material has been received.
Purdue is a Common App school. Future freshmen applying to be degree seeking on our West Lafayette campus apply with the Common App; all other students (transfer, non-degree seeking, etc.) use the Purdue application.