Does swiping your plastic (or metal) credit card sometimes seem more like you’re spending funny money than actual currency? It's a normal feeling. And research confirms that people do in fact spend more money — often, substantially more money — when they make purchases on a credit card instead of using cash.

It makes sense. Cash is a tangible piece of paper with value attached to it. When you spend it, you have less of it in your wallet. You see this and process it. But with the widespread adoption of credit cards, mobile wallets and peer-to-peer payment systems like Venmo, transactions are less transparent.

Will that make you spend more? Here’s what the studies say, and how you can make sure you’re in control of your spending.

The psychology of credit card spending

It’s easy to convince yourself, without even knowing it, that you’re not spending “real” money when you charge on your credit card. And technically, that's correct.

"In fact, you're not really spending money — you're borrowing money," writes author and certified public accountant Michele Cagan in her book, "Debt 101." "You know that you’ll have to pay the bill eventually, but the promise of small minimum payments can make purchases seem like bargains." Unless you pay back the purchase immediately, you won't feel the pain of the bill for basically a month.

Multiple behavioral economics studies back this up, including a now-classic study by Drazen Prelec and Duncan Simester, professors at Massachusetts Institute of Technology, in which randomly selected participants were offered the opportunity to buy highly desirable, sold-out tickets to a professional basketball game.

“ Unless you pay back a credit card purchase immediately, you won't feel the pain of the bill for basically a month.”

Half the participants were told that they would have to pay cash for the tickets. The other half were told that they would be required to pay by credit card. Those who were told they would have to pay by credit card were willing to pay more than twice as much on average as those who were told that they would have to pay by cash. In other words, study participants were willing to pay a 100% premium for the opportunity to buy now and pay later.

Another often-cited study is one conducted by Dun & Bradstreet, in which the company found that people spend 12%-18% more when using credit cards instead of cash. The Federal Reserve Bank of Boston recently found an even sharper disparity between cash and non-cash transactions. According to a 2016 report from the bank, the average value of a cash transaction was $22, compared with $112 for non-cash transactions — a 409% jump.

Older studies and real-world data points have also tended to support this general idea through the years:

One study from the Journal of Applied Psychology found that diners tipped an average of about 4.3% more just by seeing a credit card logo on the tray that holds their restaurant bill.

McDonald’s once reported that its average ticket was $7 when people used credit cards versus $4.50 for cash.

A published paper from MIT economist Amy Finkelstein found that U.S. states with highway tolls would tend to increase that toll once they'd installed an automatic collection system, such as EZ-Pass. The study suggests that states realized they could charge more because consumers don't "feel" the electronic transaction in the same way they would by parting with "real money."

Credit cards = happiness?

If you’ve ever shopped at Amazon at 2 a.m, you probably know this all too well. Since studies have shown that consumers are willing to spend more when they charge their purchases, it makes sense that credit cards are ripe for impulse purchases.

And for many impulse buyers, shopping may be a way to elevate their moods, notes consumer psychologist Ian Zimmerman, Ph.D., in an article for Psychology Today.

"The impulse buyer likes the product, and experiences pleasure at the thought of being able to purchase it immediately and go home with it," he writes in the article. "The impulse buyer can’t resist the urge to buy the product and does so, without considering whether it’s too expensive and/or frivolous."

“ With credit cards, because you don’t pay for something the moment you buy it, it’s less psychologically painful to spend your future money than your present money.”

Enter the phenomenon known as “payment coupling," which studies refer to as the time difference between when you choose to purchase something and when you actually end up paying for it. With credit cards, because you don’t pay for something the moment you buy it, it’s less psychologically painful to spend your future money than your present money.

On the flip side, a 2016 study published in the Journal of Consumer Research concludes that those who pay with cash actually enjoy a better relationship with the products they purchase. Because cash is viewed as “real” money, consumers actually form an increased emotional attachment to the products they shell out their cold, hard dollars for.

More competitors to cash

It's often been said that "cash is king," but 2018 marked a pivotal moment for cash's crown: For the first time, the number of Automated Clearing House debit transactions exceeded the number of check payments.

Meanwhile, Venmo, millennials' favorite peer-to-peer payment system, processed $31 billion in payments in the first quarter of 2020 alone, a sharp 48% rise year over year. While mobile wallets have been slower to catch on, a 2019 Pew Trust study showed that more than half of U.S. adults had conducted a smartphone transaction in the past year.

As cash continues to fall out of fashion in favor of the ease of cards (and, perhaps, for sanitary concerns in COVID-19 times), digital payments using credit and debit cards are likely to continue to rise.

Credit card spending still has many positives

Despite the potential to entice overspending, credit cards still come with a long list of checkmarks in the “pros” column. In fact, if you can stick to a budget and pay your card bill in full and on time each month, you should probably use a credit card for most expenses.

“ Responsible credit card spending is a good thing. If you treat it like 'real' cash and swipe only what you know you can pay back in full and on time, you can reap many benefits.”

For starters, thanks to federal fraud protections and the 0% liability protection most card issuers offer, credit cards are safer to carry than cash and even debit cards. Many also come with consumer purchase protections such as extended warranties and insurance.

Plus, credit cards help you build credit, and you can earn significant rewards while you're at it.

And of course, in many cases, you may have little choice. If you simply don’t have enough cash in your pocket that day, or if you encounter a sudden emergency or change in your financial picture, a credit card may be your only option. Some businesses don't even accept cash anymore, for a variety of reasons including customer and employee safety.