30% bonus for assets placed in service between 9/11/01 and 5/5/03
50% bonus for assets placed in service between 5/6/03 and 12/31/04
50% bonus for assets placed in service between 8/28/05 and 12/31/07 and marked as located in the GO Zone
50% bonus for assets placed in service between 1/1/08 and 9/8/10
100% bonus for assets placed in service between 9/9/10 and 12/31/11
50% bonus for assets placed in service between 1/1/12 and 9/27/17
100% bonus for assets placed in service between 9/28/17 and later
30% bonus for assets placed in service after 12/31/07 for disasters declared after 12/31/07 and occurring before 1/1/10 and marked as located in a Disaster Area