A debit card is linked to your Chequing or Savings account and draws from the available funds in your account. When you use your debit card, funds are immediately withdrawn from your account.A credit card allows you to borrow money up to the credit limit authorized by the credit card company. Each month you will receive a statement with your purchase details and the minimum payment due. If you do not pay off your credit card balance in full each month, you will be charged interest on the balance owing.