"A good rule of a thumb is to never charge anything that you can eat," said Denise Winston, author of the book Money Start$ Here. "Just carry cash, because you can't spend what you don't have."
A Journal of Consumer Research report written by economists Manoj Thomas, Kalpesh Kaushik Desai and Satheeshkumar Seenivasan concluded that shoppers paying with credit cards find it harder to resist indulgent purchases such as fast food or unhealthy treats.
"Credit cards are synonymous with a buy now, pay later mentality," said Sam Milo, spokesperson for PaydayLoansOnline.net, a short term loan comparison site. "This intriguing study published in the Journal of Consumer Research suggests that this way of thinking also applies to the contents of the shopping trolley being paid for by plastic. As a result, the consequences of certain purchases are just not being thought through."
Credit cards weaken the impulse control of consumers, making it more difficult for them to rationalize that something is not a necessary purchase, according to the study.
"It gives a lot of people a rush to use a credit card but you become numb when using one, so I recommend a debit card instead because you get the same hit without incurring debt when the purchase amount is withdrawn from your checking account," Winston said.