How Do Credit Cards Work? A Beginner’s Guide to Smart Spending

Related: See how different card features stack up in our credit card comparison chart.

A credit card is a payment method you can use when you don't have the cash (or don't want to spend it) upfront. When you swipe, insert, or tap your card at a store or enter your account information online at checkout, you ask the credit card company to approve the transaction and pay the merchant on your behalf.

The transaction will likely go through if you have enough available credit (the amount the card issuer is willing to lend you minus what you've already spent). Then, you're in debt to the company and must pay it back per the terms of your cardholder agreement, which typically includes paying interest (the price to borrow).

Then, you'll have a few more weeks to pay off the statement balance (the total amount you owe) and avoid interest charges or make at least the minimum payment (the least you can pay and keep your account in good standing) and avoid late fees and credit score dings.

What are the different types of credit cards?

There are many different types of credit cards on the market. Some cards even wear multiple hats, offering rewards, travel perks, and promotional APRs simultaneously.

If you carry a balance from month to month, you can expect to pay interest (also known as the annual percentage rate, or APR) on that amount (assuming a 0% promotional APR isn't in effect). Your interest rate will likely be variable (meaning it can change) and could be as high as 36% (though the average rate at the end of 2024 was just under 23%). But no matter what APR you have, carrying a balance means you'll ultimately pay more than face value for your purchases.

In addition, your credit card issuer will likely charge fees under certain circumstances:

• Annual fee: The price per year to keep your account active (could be several hundred dollars, depending on the card).

• Cash advance fee: The cost of borrowing cash from your credit line rather than using your card to pay (generally 3% to 5% of the advance amount).

• Balance transfer fee: The cost of transferring debt from another card (usually 3% to 5% of the transferred amount).

• Foreign transaction fee: The cost of using your card while traveling internationally (often around 3% of the purchase).

• Late fee: The cost of missing your payment due date (often a flat amount, like $39).

Annette Harris, accredited financial counselor (AFC®) and owner of Harris Financial Coaching warns, "These fees are added to your monthly or annual balance due and can put you further into debt."

However, fees are not always bad. Many cards with an annual fee offer rewards and perks that offset the expense.

How do you get a credit card?

If you're new to credit cards, applying for an account may be daunting. Here's how to get a credit card, step-by-step:

1. Consider your preferences and goals: Answer questions like: Am I okay with paying an annual fee? Do I want to earn rewards? Am I transferring a balance from another account?

2. Understand your credit profile: Check your credit report and score. Many card issuers will disclose what type of credit you need to qualify for a certain account.

3. Research cards: Read credit card "best of" lists, visit card issuer websites, and ask family and friends for recommendations. Jot down the cards that align with your profile.

4. Compare accounts: Put the cards on your shortlist head-to-head, comparing their benefits and costs, alongside the company's customer service reputation.

5. Choose one and apply: Decide which card meets your needs the best and submit an application. You might receive an instant decision when you apply online.

If approved, you may get a virtual card to use online immediately. Generally, you'll receive your physical card in the mail within several business days. You must activate your account by calling the number on the card or visiting a website before using it.

• Note: Each time you apply for a credit card, the issuing company may perform a hard inquiry on your credit report, which can result in your credit score dropping a few points. Therefore, it's wise to avoid applying for multiple cards at the same time.

Using a credit card responsibly can help you establish a high credit score, which can then help you qualify for other financing (like a mortgage or auto loan) with favorable terms later. Managing your credit card account is an ongoing process—you must repeat these steps indefinitely to maintain a high score:

• Pay your bill on time (and in full, if possible): Your payment history has the greatest impact on your credit score. Set payment reminders or enroll in automatic payments so you can't forget.

• Keep your balance low: Weiss said, "To maximize your credit score, you're going to want to keep spending below 30% of your credit utilization. So, if you have a $1,000 credit limit on a card, try to spend less than $300 on that card."

• Set (and stick to) a budget: "Get in the habit of being proactive with your budget. Don't wait until the end of the month to see if you can pay your bill in full, but develop a system that ensures you're spending only what you can afford to pay back," advised Weiss.

• Monitor your credit score: "It's not a perfect measure of financial health by any means, but it's a good way to get feedback on whether your financial habits are lining up with best practices," said Weiss.

Are there any credit card alternatives?

There are other viable options if you don't want (or can't qualify for) a credit card:

• Debit Cards: If your debit card has a Visa or Mastercard logo, you can use it to shop online and in practically every store. The money comes directly from your checking account, preventing you from going into debt.

• Secured Credit Cards: Excellent for building credit for the first time or repairing it. You put down a refundable security deposit (e.g., $200), which becomes your credit limit. Use it, pay it off monthly, and you can eventually graduate to a traditional, unsecured card.

Bottom line: Should you get a credit card?

There is no simple, universal answer. If you stick to a budget and have cash stashed aside for emergencies, a credit card is an excellent tool to earn rewards or consolidate higher-interest debt. However, if you're living paycheck to paycheck, you may want to avoid them for now, as they can easily worsen your financial situation if not handled correctly.

Frequently Asked Questions

How do credit cards make money?

Credit card companies primarily make money by charging interest on the balances cardholders carry from month to month. They also generate massive revenue through merchant interchange fees (fees businesses pay to accept the card) and consumer fees for annual memberships, cash advances, balance transfers, and late payments.

How does a credit card statement work?

A credit card statement is a monthly summary sent by your issuer. It details all transactions made during the billing cycle, your total current balance, the minimum payment required, and the final payment due date. Reviewing this monthly helps you spot unauthorized charges and track your spending habits.

How do credit card payments work?

Each month, you are required to pay at least the minimum amount due to keep your account in good standing. If you only pay the minimum, a portion goes toward interest charges and the rest goes toward your principal balance, meaning it will take much longer to pay off. Paying the full statement balance every month ensures you never pay a dime in interest.