At the minute:
+$3250 when your team WINS the round
+$1400 when your team LOSES the round
+$800 team bonus if the bomb is PLANTED but DEFUSED
+$300 personal bonus for PLANTING or DEFUSING the bomb
+$300-$900 personal bonus per KILL
All SMGs give a $600 reward; all shotguns give a $900 reward; and the AWP gives a $50 reward.