APR is the yearly cost of borrowing money on your credit card, shown as a percentage

APR stands for Annual Percentage Rate. It tells you what fraction of your card's balance you will owe in interest charges over one year. If your card has a 20% APR and you carry a $1,000 balance for a full year without paying it down, you will owe roughly $200 in interest on top of the original $1,000.

The APR is not the same as a one-time fee. It is a rate that applies to whatever balance you are carrying. The longer you carry a balance, the more interest you pay. If you pay off your full statement balance by the due date each month, most cards charge you no interest at all, regardless of the APR.

Different cards come with different APRs. A card for someone with excellent credit might have an APR of 15%, while a card for someone rebuilding credit might have an APR of 25% or higher. The card issuer sets your APR based on your credit history, income, and the card's terms.

Key Takeaways

  • APR is the yearly interest rate charged on any balance you carry from month to month on your card.
  • You only pay interest if you carry a balance past your statement due date; paying in full each month means zero interest charges.
  • Different people get different APRs on the same card product, based on their credit score and financial history.
  • Most cards have multiple APRs — one for purchases, one for balance transfers, and one for cash advances — and they can be different rates.
  • The APR you are offered when you open the card is not permanent; issuers can raise it if you miss payments or if a promotional rate expires.

How APR is calculated and applied to your balance

Credit card companies calculate interest daily, not yearly. They take your APR, divide it by 365 days, and apply that daily rate to your balance each day. At the end of your billing cycle, they add up all those daily charges to get your total interest for the month.

This matters because your balance changes throughout the month as you make purchases and payments. The company usually calculates interest using your average daily balance — the sum of your balance on each day of the billing cycle, divided by the number of days. If you pay down your balance mid-month, you reduce the interest you owe for the rest of that cycle.

Some cards use different methods to calculate interest, such as the previous balance method (using only what you owed at the start of the cycle) or the two-cycle method (averaging your balance over two months). These methods can result in higher interest charges. Your card's terms document will state which method the issuer uses.

Different APRs for different types of transactions

Most cards do not have just one APR. A single card often has three or more:

  • Purchase APR — the rate charged on regular purchases you make with the card.
  • Balance transfer APR — the rate charged if you transfer a balance from another card to this one. This is often lower than the purchase APR for an introductory period, then rises.
  • Cash advance APR — the rate charged if you use the card to withdraw cash from an ATM or get cash from a bank. This is almost always higher than the purchase APR and starts accruing interest immediately, with no grace period.

When you carry a balance across multiple types of transactions, the card issuer applies your payment to the lowest-APR balance first (by law in most states), meaning the highest-APR balance stays on the card longer and costs you more.

Introductory APR offers and how they work

Many cards advertise a 0% APR for a set period — often 6 to 21 months — on purchases, balance transfers, or both. During this period, you pay no interest on that type of transaction, even if you carry a balance.

The catch is that the 0% rate is temporary. When the introductory period ends, the regular APR kicks in on any remaining balance. If you still owe $3,000 when the 0% period expires and the regular APR is 18%, you will suddenly start paying interest on that $3,000.

Introductory rates are useful if you have a plan to pay down the balance before the rate changes. They are risky if you assume the 0% rate will last indefinitely or if you do not know when the period ends. Check your card agreement for the exact end date.

How your credit score and payment history affect your APR

The APR you receive when you open a card depends largely on your credit score. People with scores above 750 typically get the lowest advertised rates. People with scores below 650 often get rates 10 to 15 percentage points higher on the same card product.

Your APR can also change after you open the account. If you miss a payment by 30 days or more, the issuer can raise your APR as a penalty. This is called a penalty APR, and it can be significantly higher than your original rate. Some cards also raise APR if you go over your credit limit or if the prime rate (set by the Federal Reserve) rises.

Conversely, if you build a strong payment history and your credit score improves, you can ask your issuer to lower your APR. Some issuers will negotiate, especially if you have been a customer for a while and have not missed payments.

Comparing APRs across different cards

When you are looking at different credit cards, the APR is one factor to consider, but not the only one. A card with a slightly higher APR might offer better rewards or lower fees, which could save you money overall if you pay your balance in full each month.

If you do carry a balance regularly, APR matters much more. In that case, a card with a lower purchase APR and no annual fee is usually the better choice. You can use an online calculator to estimate how much interest you will pay over time at different APRs, which makes it easier to compare cards side by side.

Keep in mind that the APR you see advertised is not may provide. Card issuers show a range — for example, "15.99% to 25.99% APR" — and the rate you actually receive depends on your credit profile. You will find out your exact APR only after you apply and the issuer reviews your credit report.

What to do if your APR seems too high

If you have a card with a high APR and you are carrying a balance, you have a few options. The first is to contact your issuer and ask for a lower rate. This works best if you have a good payment history and your credit score has improved since you opened the account. Be prepared to mention competing offers you have received.

A second option is to transfer your balance to a card with a lower APR or a 0% introductory offer. Balance transfer cards often charge a fee (usually 3% to 5% of the amount transferred), but if your current APR is very high, the fee can still save you money in the long run. Calculate the fee plus the interest you would pay at the new rate versus staying where you are.

A third option is to focus on paying down the balance as quickly as possible, regardless of the APR. The less time your balance sits on the card, the less interest you pay overall. Even small extra payments each month can significantly reduce the total interest cost.

Frequently Asked Questions

Does APR apply if I pay my full balance every month?

No. If you pay your entire statement balance by the due date, you will not be charged any interest, and the APR does not apply. This is called the grace period. It typically lasts 21 to 25 days from the end of your billing cycle. The grace period does not apply to cash advances or balance transfers on most cards.

Can a credit card company raise my APR without warning?

Card issuers must give you at least 45 days' notice before raising your APR, by law. However, they can raise a penalty APR immediately if you miss a payment by 30 days or more. They can also raise your rate when an introductory period ends. Check your card agreement and statements for notices of rate changes.

What is the difference between APR and interest rate?

APR and interest rate are often used interchangeably on credit cards, but APR technically includes fees in addition to the pure interest rate. For credit cards, the difference is usually small, but for loans like mortgages, APR can be meaningfully higher than the stated interest rate because it includes closing costs and other fees.

If I make a large payment, does my APR go down?

No. Making a large payment reduces your balance, which means you owe less interest going forward, but it does not change your APR itself. Your APR stays the same unless the issuer raises or lowers it, or an introductory period ends. However, a lower balance means lower interest charges, so large payments do save you money.

Why do different cards offer such different APRs?

Card issuers set APRs based on how risky they think lending to you is. They look at your credit score, payment history, income, and existing debt. They also factor in the card's features — a rewards card with valuable perks often has a higher APR than a basic card. Competition between issuers also affects rates; during periods of low interest rates, many cards offer lower APRs.