Group 1: 

GS 1 to 5

WB (L) 1 to 7     $15.25 per pay period

Group 2:

GS 6 to 11

WB (L) 8 to 28    $19 per pay period

Group 3:

GS 12 and above

WB (L) 29 and above    $21 per pay period