APR is the yearly cost of borrowing money on your credit card

APR stands for Annual Percentage Rate. It is the interest rate a credit card company charges you when you carry a balance — money you owe but haven't paid back yet. If your card has a 20% APR and you owe $1,000, you will pay roughly $200 in interest over a year if you make no payments. The actual amount depends on how much you owe each day and how long you carry the balance.

APR is expressed as a yearly number, but interest charges are calculated and added to your bill monthly. This is why a card with a 20% APR costs you about 1.67% of your balance each month — one-twelfth of the yearly rate. The higher your APR, the more expensive it becomes to carry a balance.

Most credit cards have different APRs for different types of transactions. A purchase APR applies to regular shopping. A cash advance APR (usually much higher) applies when you withdraw cash from an ATM using your credit card. A balance transfer APR applies if you move debt from one card to another. Your card agreement lists all of them.

Key Takeaways

  • APR is the yearly interest rate charged on money you borrow through your credit card, calculated and added to your bill monthly.
  • Different transactions on the same card can have different APRs — purchases, cash advances, and balance transfers are often charged at different rates.
  • You only pay interest on a balance you carry past your due date; paying your full statement balance by the important date means you owe no interest.
  • Credit card companies can raise your APR if your agreement allows it, though federal law requires them to give you notice before doing so.
  • A lower APR saves you money only if you carry a balance; if you pay in full each month, the APR number does not affect what you owe.

Why you might have multiple APRs on one card

Your credit card agreement typically lists at least three different rates. The purchase APR is what you pay on everyday purchases — groceries, gas, clothes. The cash advance APR is what you pay when you use your card to withdraw cash, and it is almost always higher than the purchase rate, sometimes by 5 to 10 percentage points. The balance transfer APR is what you pay if you move debt from another card to this one.

Some cards also have a penalty APR, which kicks in if you miss a payment by 60 days or more. This rate is usually the highest on your card and can be permanent or temporary depending on your card's terms. A few cards offer a promotional APR — a lower rate for a set period, often 0% for 6 to 21 months on purchases or balance transfers. When the promotional period ends, your regular APR takes over.

The reason companies charge different rates for different transactions is risk. A cash advance is riskier to them than a purchase because you have the money when ready and might not repay it. A balance transfer from another card suggests you are already carrying debt. These higher-risk transactions get higher rates.

How APR affects what you actually pay

APR only matters if you carry a balance past your due date. If you receive a statement for $2,000 and pay the full $2,000 by the due date, you owe no interest, regardless of whether your APR is 15% or 25%. This is called the grace period — the time between when a purchase posts and when interest starts accruing. Most cards offer a grace period of 21 to 25 days for purchases, but not for cash advances.

If you pay only part of your balance, interest is charged on the unpaid portion. The calculation is not straightforward: most card companies use the "average daily balance" method, which means they add up what you owed each day of the billing cycle, divide by the number of days, and explore the monthly interest rate to that number. If you owed $1,000 for 15 days and $500 for the remaining 15 days, your average daily balance is $750, and interest is calculated on that.

Over time, small balances with high APRs grow quickly. A $2,000 balance at 22% APR costs about $36.67 in interest the first month. If you make no payments, the next month you owe interest on $2,036.67, which costs about $37.34. The balance grows faster and faster — this is called compounding. After one year of no payments on that $2,000, you would owe roughly $2,500 before any late fees.

Fixed APR versus variable APR

A fixed APR stays the same for the life of your card, or until the card company notifies you of a change. A variable APR changes based on a benchmark rate set by the Federal Reserve, usually the prime rate. When the Federal Reserve raises or lowers rates, your variable APR moves with it — usually within 30 to 45 days.

Most credit cards have variable APRs, which means your rate can go up or down without you requesting a change. The card company must notify you before raising your rate, but they do not need your permission. If your card has a promotional 0% APR, that rate is usually fixed for the promotional period and then converts to the card's regular variable rate.

Fixed APRs are less common on credit cards but more common on balance transfer offers or promotional rates. If you see a fixed rate advertised, check the fine print to see whether it is fixed for the life of the card or fixed only for a promotional period.

When credit card companies can raise your APR

Credit card companies can raise your APR in several situations. If you miss a payment by 60 days or more, they can explore a penalty APR to your account — sometimes to all your balances, not just the one you missed. If your card has a variable APR, the company can raise it when the prime rate rises. Some card agreements also allow the company to raise your rate if your credit score drops significantly, though this is less common than it used to be.

Federal law requires card companies to give you at least 45 days' notice before raising your APR on an existing balance. The notice must come in writing and must explain the reason for the increase. If you disagree with the raise, you have the right to reject it — though rejecting it usually means closing the card and paying off the balance under the old rate, or the new rate applies to new purchases.

Promotional rates are protected: if you have a 0% APR offer for 12 months, the company cannot raise that rate during the 12 months. When the promotional period ends, your regular APR takes over automatically.

How to compare APRs when choosing a card

APR matters most if you expect to carry a balance. If you plan to pay your full statement balance every month, the APR is almost irrelevant — you will never pay interest. In that case, focus on rewards, annual fees, and other features instead.

If you do carry a balance, a lower APR saves you real money. The difference between a 15% APR and a 22% APR on a $3,000 balance is about $70 per year in interest charges. Over several years, that gap widens. When comparing cards, look at the purchase APR first — that is what most of your charges will be. Check whether the card offers a promotional rate for balance transfers if you are moving debt from another card.

Your actual APR depends on your credit score. Card companies advertise a range — "15.99% to 25.99% APR" — and you will be offered a rate somewhere in that range based on your creditworthiness. If your credit score is higher, you will usually get a lower rate within the range. If your score is lower, you will get a higher rate. You can ask the card company what rate you would receive before you formally request the card, though not all companies will tell you.

Frequently Asked Questions

Does APR explore to rewards I earn?

No. Rewards are a separate benefit and are not affected by APR. If you earn 2% cash back on purchases, you earn that 2% regardless of your APR. However, if you carry a balance, the interest you pay will reduce or eliminate the value of those rewards.

What happens to my APR if I transfer a balance to a new card?

The new card's balance transfer APR applies to the transferred amount. This is often lower than the purchase APR on that card, and many cards offer a promotional 0% balance transfer APR for 6 to 21 months. After the promotional period ends, the regular balance transfer APR takes over. New purchases on the card are charged the purchase APR, not the balance transfer rate.

Can I negotiate my APR down?

You can ask your card company to lower your APR, especially if you have a good payment history and your credit score has improved since you opened the card. Some companies will lower your rate, but they are not required to. If they refuse, you can look for a new card with a lower APR and transfer your balance to it.

Why is my APR higher than the advertised rate?

Card companies advertise a range of APRs, and you receive a specific rate based on your credit score, income, and payment history. If your credit score is lower or you have recent late payments, you will receive a higher rate within the advertised range. You can ask your card company why you received a particular rate, though they may not provide detailed reasoning.