Chris Tapp, director of the body, compared the practice of shopping for plastic to buying a car.
"You do not just compare one aspect of the car. You do not just compare top speed, you compare how many miles to the gallon you are going to get and these types of things," he explained.
"Make sure that you are doing that with credit cards."
Last month, the Office of Fair Trading released research which found that around 70 per cent of credit card holders do not shop around before selecting their plastic.
The report added that such a move could be leaving many card users at a financial disadvantage.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.