Each month, your billing statement notes your due date. You have a 20-day grace period between your billing date and the date your bill is due. The bottom of your billing statement will have a perforated/detachable stub. To make sure we properly credit your account, be sure to include the stub with your payment. If all or a portion of bill is not paid by the payment due date, CAW may assess a 10% penalty against the unpaid portion of the bill.