Required payment is the minimum payment and includes your monthly payment and any past due or overlimit amounts. It's accurate as at the last business day. This is the amount you need to pay by the due date in order to avoid a late payment fee and meet the terms and conditions of your account.
Current balance is the amount you currently owe on this credit card.
Statement closing balance is the amount you need to pay each month by your due date to avoid interest on purchases. This amount is accurate as at your statement date.