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APR stands for Annual Percentage Rate—it's the yearly cost of borrowing money on a credit card, expressed as a percentage. When you carry a balance (rather than paying it off in full each month), you're charged interest, and APR is how that interest rate is quoted to you.
Here's the straightforward version: if your card has a 20% APR and you carry a $1,000 balance for a full year without making payments, you'd owe roughly $200 in interest (the math is slightly more complex because interest compounds daily, but that's the ballpark). Most people don't carry balances for a year, so you'd typically pay a portion of that based on how many days you actually owe the money.
The key point: APR only matters if you carry a balance. If you pay your full statement balance by the due date each month, you won't pay any interest, regardless of how high your APR is.
A single credit card can have multiple APRs, and this is crucial to understand:
| APR Type | When It Applies |
|---|---|
| Purchase APR | Charged when you carry a balance on regular purchases |
| Balance Transfer APR | Applied when you transfer a balance from another card; often lower than purchase APR, sometimes 0% for an introductory period |
| Cash Advance APR | Usually higher than purchase APR; charged if you withdraw cash using your card |
| Penalty APR | Applied if you miss a payment; typically the highest rate on your card |
Each type can have a different rate, and some may be fixed while others are variable (meaning they change over time based on market conditions).
Your specific APR isn't random—it reflects several factors:
The credit card company uses these factors to assess risk—higher risk means a higher APR to compensate them for the potential loss.
People often use these terms interchangeably, but there's a distinction. APR is the annual rate, while interest is the actual dollar amount you pay. If your APR is 18% and you carry a $500 balance for one month, you'd pay roughly $7.50 in interest (that's 18% divided by 12 months, times your balance). The APR tells you the yearly cost; interest is what you actually owe day-to-day.
Because APRs vary widely—ranging from single digits on promotional offers to 30% or higher on some cards—the choice of card matters significantly if you expect to carry a balance. A $5,000 balance carried for a year at 12% APR costs roughly $600 in interest. The same balance at 24% APR costs roughly $1,200. That difference isn't trivial.
However, APR matters far less if you're someone who pays off your balance monthly. In that case, a card's rewards rate, annual fee, and other features become more important than APR.
To decide whether a card's APR works for you, consider:
Understanding APR is about recognizing it as one piece of the credit card picture—important if you borrow, largely irrelevant if you don't.
