Debit card is a card that is attached to your bank account and when you use a debit card you are basically using your money from your bank account. Credit card is a card given to you by a bank or credit card company and it is not attached to your account. When you use credit card you are basically using bank’s money or credit card company’s money. The best part is you use the money for free, without any fees for 45 days, or the time frame your credit card issuer gives to you. Since you can use money for free, you can use credit card to pay your bill where as use your own money for investment and building assets.