For the typical property tax homestead exemption, applications are generally due in the spring of the relevant tax year — as early as March 1 in some states (like Florida) and as late as April 30th (Texas).  It’s often close to Tax Day or your first quarter property tax’s due date.  You must have been occupying the home since Jan. 1 of that year. Many states also allow you to make a late application for several months after the official deadline.