Credit cards are everywhere. They are in our wallets, on our phones, and often built into our online shopping habits. These cards offer convenience, rewards and, at times, a false sense of financial freedom. Most people feel confident they understand how credit cards work, but there are a few lesser-known details that can cost you more than you realise. In this article, we look at one important rule many cardholders are unaware of and share a few other facts that could change the way you use your card. What most people know about credit cards For most cardholders, the basics are clear:

• You use the card to make purchases.
• You receive a bill each month.
• You can pay the full amount or just the minimum.
• If you don’t pay in full, you’re charged interest.
• Some cards offer perks like cashback, air miles, or reward points.

But this is usually where the understanding ends. There are other rules at play that card issuers...