Credit Card Myths That Cost You Money

By Bryce Casson, Founder · Cardocrat · Updated June 2026

The short answer: A lot of credit card common knowledge is simply wrong, and believing it costs real money. You do not need to carry a balance to build credit, and doing so just pays interest for nothing. Closing an old card can lower your score rather than raise it. Checking your own score does not hurt it. Here are the myths to drop, and what is actually true.

Myth: carrying a balance helps your credit score

This is the most expensive myth in personal finance. You do not need to carry a balance or pay a cent of interest to build credit. Your score is driven by paying on time and keeping utilization low, both of which you achieve by paying your statement in full every month. Carrying a balance hands the issuer interest for zero credit benefit. Pay in full, always. See should you carry a balance and how interest works.

Myth: closing a card helps, and other score myths

Closing a credit card usually hurts your score, not helps it, because it removes available credit (raising your utilization) and over time can shorten your average account age, so keeping a no-fee card open is generally better. A few related myths: checking your own credit score is a soft inquiry and does not hurt it; you do not need a pile of cards, but more available credit can lower utilization; and a reported zero balance is not magic, a small balance paid in full is perfectly fine. See credit utilization and hard versus soft inquiries.

Myth: rewards are free money and annual fees are always bad

Rewards feel free, but they are funded by swipe fees baked into prices, and they only come out ahead if you pay in full and do not let chasing them drive overspending. On the flip side, an annual fee is not automatically bad. A fee card wins when its credits and rewards beat the fee for your actual spending, and a no-fee card is not automatically the smarter pick. Judge both by the math, not the myth. See are annual fees worth it and how cards make you spend more.

Myth: more cards or applications wreck your credit

Opening a card adds one small, temporary dip from the hard inquiry and a new, young account, but responsible use builds your credit over time, and holding several cards is fine and can even help utilization. The things that actually damage credit are missed payments and carried debt, not the number of cards in your wallet. Apply with intent, mind issuer limits like Chase 5/24, and do not let fear of inquiries stop you from a card that fits. See the 5/24 rule and how to build credit.

Frequently asked questions

Do you need to carry a balance to build credit?

No. This is the most common and costly myth. Credit is built by paying on time and keeping utilization low, both of which you get by paying in full. Carrying a balance only adds interest with no benefit to your score.

Does closing a credit card help your credit score?

Usually the opposite. Closing a card removes available credit, which can raise your utilization, and over time can shorten your average account age. Keeping a no-fee card open, or downgrading instead of closing, is generally better.

Does checking your own credit score hurt it?

No. Checking your own score or report is a soft inquiry and has no effect on your score. Only a hard inquiry from applying for credit causes a small, temporary dip.

Are credit card rewards free money?

Not exactly. Rewards are funded by merchant swipe fees built into prices, and they only pay off if you avoid interest and do not overspend to earn them. Carry a balance and the interest erases the rewards.

Do more credit cards hurt your credit?

Not on their own. Each application is a small temporary dip, but more available credit can lower utilization and responsible use builds history. Missed payments and debt hurt credit far more than the number of cards.