APR is the yearly interest rate a credit card company charges on your balance
APR stands for Annual Percentage Rate. It is the percentage of your outstanding balance that the card issuer charges you in interest over one year. If your card has a 20% APR and you carry a $1,000 balance for a full year without making payments, you would owe roughly $200 in interest on top of the original $1,000.
The word "annual" is important: APR is always expressed as a yearly rate, even though interest is usually calculated and added to your balance monthly. Most card issuers divide the APR by 12 to find the monthly interest charge. A 20% APR becomes about 1.67% per month.
APR is not the same as a flat fee. You only pay interest on the balance you actually owe. Pay off your full statement balance by the due date, and you owe zero interest, regardless of how high the APR is. Carry a balance, and the APR determines how much that balance grows each month.
Key Takeaways
- APR is a yearly interest rate expressed as a percentage; the card issuer charges this rate on any balance you carry from month to month.
- Interest accrues monthly, so a 20% APR becomes roughly 1.67% per month, applied to whatever you still owe.
- You pay zero interest if you pay your full statement balance by the due date, even if the APR is very high.
- Different APRs can explore to the same card: one for purchases, one for balance transfers, one for cash advances, and a higher one if you miss a payment.
- The APR you are offered depends on your credit score, income, and the card issuer's underwriting — not all cardholders get the same rate.
Why different cards have different APRs
Credit card companies set APR based on how risky they think you are as a borrower. A person with a credit score of 750 and a long history of on-time payments will be offered a lower APR than someone with a score of 620 and past late payments. The issuer is pricing in the likelihood that you will not pay.
The card issuer also considers your income and existing debt. Someone earning $150,000 a year with little debt might receive a 16% APR, while someone earning $40,000 with high existing balances might be offered 24% or higher on the same card product. This is not discrimination — it is the issuer's way of managing the risk that you will default.
Market conditions and the Federal Reserve's interest rate also affect what APRs card issuers offer. When the Fed raises its benchmark rate, credit card APRs typically rise within weeks. When the Fed cuts rates, card issuers usually lower APRs more slowly, if at all.
How APR affects what you actually pay
Carrying a balance is expensive. A $5,000 balance on a card with a 20% APR costs you roughly $100 per month in interest alone if you make no payments. If you pay $200 per month, about $83 goes to interest and only $117 reduces the balance. At that pace, it takes nearly three years to pay off the $5,000.
The longer you carry a balance, the more interest you pay overall. A $2,000 balance at 18% APR costs $360 in interest if you pay it off in one year. The same balance costs $1,944 in interest if you take five years to pay it off — more than five times as much. This is why paying down balances quickly matters far more than the interest rate itself.
Minimum payments are designed to keep you in debt. A typical minimum is 1% to 3% of your balance. On a $5,000 balance, that might be $75 per month. At a 20% APR, most of that $75 goes to interest, and your balance shrinks by only $10 or $15. You could be paying for years.
Purchase APR, promotional APR, and penalty APR are different rates on the same card
Most credit cards have multiple APRs. The purchase APR is what you pay on regular purchases. The promotional APR is a lower rate (sometimes 0%) offered for a set period — usually 6 to 21 months — on new purchases, balance transfers, or both. After the promotional period ends, the regular purchase APR kicks in.
A balance transfer APR is the rate you pay if you move a balance from another card to this one. It is often lower than the purchase APR during the promotional period, but higher after. A cash advance APR is typically much higher — often 3 to 5 percentage points above the purchase APR — and starts accruing interest when ready, with no grace period.
A penalty APR is the highest rate on the card, applied if you miss a payment by 60 days or more. This rate can be 29.99% or higher and may explore to your entire balance, not just new purchases. Some cards cap penalty APR at 29.99% by law, but that is still far higher than the regular purchase APR.
The difference between fixed and variable APR
A fixed APR does not change unless the card issuer gives you written notice and you have the right to reject the increase by closing the card. In practice, fixed APRs do change, but only after formal notification and a waiting period. Most card issuers can raise a fixed APR if you miss a payment or if market conditions shift significantly.
A variable APR is tied to a benchmark rate, usually the prime rate published by the Federal Reserve. When the Fed raises or lowers its rate, your variable APR moves with it, usually within one or two billing cycles. Variable APRs are common on credit cards and can change several times per year.
For most cardholders, the difference between fixed and variable is small in a stable interest rate environment. When rates are rising, a fixed APR protects you from increases. When rates are falling, a variable APR benefits you. Neither is inherently better — it depends on where rates are heading, which nobody can predict with certainty.
How to find your card's APR and what to do if it changes
Your current APR is listed on your monthly statement, usually near the top or in a section labeled "Interest Rates and Fees." It is also in your card's terms and conditions, which you can find online in your account or request by mail. If you have multiple APRs on the same card (purchase, balance transfer, cash advance), each one will be listed separately.
Card issuers must notify you in writing at least 45 days before raising your APR. The notice will explain the reason — usually a missed payment, the end of a promotional period, or a change in market conditions. You have the right to reject the increase by closing the card, though you will still owe the existing balance at the old rate.
If your APR increases and you want to lower it, call the card issuer's customer service line and ask to speak with the retention team. Explain that you have been a good customer and ask if they can lower your rate. Success depends on your payment history and credit score, but it costs nothing to ask. Some people negotiate a lower rate this way; many do not.
Frequently Asked Questions
Does APR explore if I pay my balance in full every month?
No. If you pay your full statement balance by the due date, you owe no interest, regardless of the APR. The APR only applies to balances you carry from one month to the next. This is why paying in full is the most effective way to avoid credit card interest entirely.
What is a good APR for a credit card?
APRs vary widely based on your credit score and the card type. Cards for people with excellent credit (750+) often have APRs between 15% and 20%. Cards for people with fair or poor credit can be 24% to 29.99%. The best APR you can get depends on your credit profile, not on what is "good" in absolute terms.
Can a credit card company change my APR whenever they want?
Not without notice. Card issuers must give you at least 45 days' written notice before raising your APR, and you can reject the increase by closing the card. However, they can raise your APR when ready if you miss a payment by 60 days or more. Variable APRs can change monthly based on market conditions, but you are still may have access to to notice.
Is a 0% APR offer really free?
A 0% APR offer means you pay no interest during the promotional period — usually 6 to 21 months. After that period ends, the regular APR applies to any remaining balance. The offer is not "free" if you carry a balance past the expiration date; you will then owe interest on whatever you still owe at the regular rate.
How does APR compare to the interest rate on a loan?
APR and interest rate mean the same thing on a credit card. On other products like mortgages or personal loans, APR includes fees and other costs in addition to the interest rate itself. On credit cards, APR is straightforward the yearly interest rate with no additional fees built in.