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A husband and wife are arguing in the kitchen while holding a credit card.
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Personal finance gurus love credit cards. Provided you pay them off every month, they’re an almost guaranteed boon to most consumers thanks to their generous perks and rewards. But no matter how magical they may seem — it’s also worth mentioning that they have a dark side — there are just some purchases that you should never put on plastic.

Vacations

family enjoying a summer day on a boat
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It seems like a way to afford travel to far-off destinations, but you have to come back home sometime — and your debt will likely be waiting for you. While many credit cards offer miles or chip into your vacation expenses, only buy what you can pay off at the end of the month, rewards or not. 

Medical Bills

A health insurance claim form along with a couple of medical bills.To see more of my medical images click on the link below
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“Don’t put (medical bills) on any kind of card that will then be charging you interest, because that’s going to make the problem worse,” said Ruth Lande, the vice president of hospital relations at the nonprofit Undue Medical Debt. Despite experts’ advice, Kaiser Health News reports that 1 in 6 Americans are paying off medical or dental debt they put on a credit card.

Weddings

Weddings
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Tying the knot isn’t cheap. Though not as much as pre-Covid, the 2022 average wedding cost around $30,000. Unless a relative is shelling out for your big day, consider scaling back. It is, after all, just a (very pricey) party, and should be budgeted as such. Just remember, you don’t want to be paying off the wedding when your first anniversary comes around. 

Gambling

Mature couple enjoying a moment gambling.
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There’s the temptation to bet it all on black, but resist if you can. It’s easier than ever to gamble with credit cards (bye, penny slots) but gambling transactions are often charged as cash advances, so you’ll be charged a fee plus a higher interest rate.

Down Payments

Real estate agent with a young couple in a new house
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If you’re paying for a down payment with a credit card, then you shouldn’t be making the purchase — plain and simple. The only exception is if you’re paying for a down payment on a car and you’re 100% certain you can pay the bill before it accrues interest. And even then, it’s a risky move that the dealer likely won’t jive with.

Taxes

Tax Return form 1040 with USA America flag and dollar banknote, U.S. Individual Income.
sasirin pamai/istockphoto

The Internal Revenue Service (IRS) charges a service fee on all credit card transactions, ranging from 1.82% to 1.98%. While that may not sound like a lot, it’s far cheaper to just pay with a debit card (around $2 per transaction). If you can’t afford to pay Uncle Sam in one go, consider applying for an IRS payment plan.

College Tuition

Young beautiful woman going over finances at home
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If you’re in college, chances are you’re in debt. But don’t worsen your situation by putting college tuition on a credit card. Instead, apply for financial aid or try to take out a student loan, which will have a lower interest rate.

Things You Can’t Afford

Young Female Customer Shopping in Clothing Store, Retail Sales Associate Helps with Advice. Diverse People in Fashionable Shop, Choosing Stylish Clothes, Colorful Brand with Sustainable Designs
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Credit card companies have made it easier than ever to overspend. Without having to count cash, check your balance, or enter a pin, you can easily spend $10,000 in seconds. And if that’s $10,000 that you don’t have, then you’re screwed. Instead, only charge what you can afford, and pay your credit card bill in full every month.

Investments

Mid adult man checking financial information on a smart phone while doing his bookkeeping in his home office in Japan. Depicts TradingView financial market chart.
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Everyone from financial experts to the Securities and Exchange Commission cautions against investing with a credit card. If you lose the money on the market and can’t pay it back, you’ll be stuck with high-interest debt. Plus, most investment firms won’t even let you buy stocks and bonds with a credit card, and those that do might be looking to scam you.

Mortgage Payments and Rent

Young brunette curly female reading her bill papers, looking stressed
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If you want to guarantee financial ruin, then try to put your mortgage payment on a credit card. You’ll be paying for not one but two types of interest. Suffice to say: you’ve got better options. The Consumer Finance Protection Bureau (CFPB) recommends calling your mortgage servicer to work something out and contacting the Department of Housing and Urban Development (HUD). And we have similar advice for renters. Contact assistance programs, and as a last resort, consider taking out a loan.

Cash Advances

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A cash advance — a short-term loan offered by your credit card company — is almost always a bad idea because the fees are high (around 3% to 5%) and the interest rates are astronomical (as high as 36%). If you can swing it, a personal loan will offer far favorable terms.

Startup Business Expenses

asian chinese senior man owner and daughter using digital tablet at bar counter table
Edwin Tan/istockphoto

Since businesses take a while to be profitable, you shouldn’t rely on high-interest credit card debt to finance your venture. Rather, it’s better to go through more conventional channels and get a small business loan or crowdfund your operation.

Cryptocurrency

Bangkok, Thailand - November 11, 2022 : iPhone 13 showing its screen with FTX, Binance, Crypto.com, Zipmex, popular cryptocurrency trading applications.
Wachiwit/istockphoto

While some credit card companies will let you buy cryptocurrency, your purchase will likely be subject to considerable fees. For example, some companies treat cryptocurrency purchases like cash advances. And for the same reason you don’t want to invest with a credit card — you shouldn’t gamble with money you don’t have — you should also avoid crypto.

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Meet the Writer

Maxwell is a California-based writer who got his start in print journalism, a career that satisfies his love of research. That penchant for learning also fuels his desire to be a discerning consumer — whether he’s looking for his next pair of headphones or rock-climbing shoes. When he’s not hunched over his laptop, you can find Maxwell sending routes at the crag, playing Magic: The Gathering, or hanging out with his buddies at the bar. As a UCSC alumnus, he’s also a proud banana slug. You can reach him at [email protected].