Purchase APR is the interest rate charged on everyday purchases you make with your credit card

Purchase APR is the yearly interest rate your card issuer charges when you carry a balance on regular purchases — groceries, gas, clothes, anything you buy that is not a cash advance or balance transfer. If your card has a purchase APR of 18%, that means you pay 18% per year on any unpaid purchase balance.

The rate matters because it directly determines how much interest you owe. A $1,000 balance at 18% APR costs you roughly $15 per month in interest alone if you make no payments. The longer you carry the balance, the more interest accumulates.

Most credit cards have a grace period — usually 21 to 25 days from your statement closing date — during which no interest accrues on purchases if you pay the full balance by the due date. Once that period ends or if you carry a balance, the purchase APR kicks in when ready.

Key Takeaways

  • Purchase APR applies only to regular purchases you do not pay off in full by your due date, not to cash advances or balance transfers.
  • Your card issuer calculates interest daily using your daily balance, so the longer you carry a balance, the more interest you owe.
  • A grace period typically protects you from interest charges if you pay your full statement balance by the due date each month.
  • Purchase APR varies by card and by your creditworthiness — cards for people with excellent credit often have lower rates than cards for people building credit.
  • Introductory rates of 0% APR on purchases are common for the first 6 to 21 months, after which the regular purchase APR takes effect.

How purchase APR differs from other card rates

A single credit card can have multiple interest rates. Your purchase APR applies to everyday transactions. Your cash advance APR — the rate on money you withdraw from an ATM using your card — is almost always higher, often 25% to 30%. Your balance transfer APR — the rate on balances you move from another card — may be lower than your purchase rate, especially during an introductory period.

Penalty APR is a separate rate that kicks in if you miss a payment by 60 days or more. This rate is typically the highest on your card and can exceed 29%.

Your card issuer lists all these rates in the Schumer Box, a standardized table on your card's terms and conditions page or in the disclosure you receive when you open the account. The purchase APR is the one most cardholders encounter first.

Why your purchase APR is different from someone else's

Card issuers set purchase APR based on your credit score, payment history, and income at the time you open the account. Someone with a credit score above 750 might receive a purchase APR of 12%, while someone with a score of 600 might receive 22% on the same card product.

Your rate can also change over time. Most issuers review your account annually and may lower your rate if you have made on-time payments and your credit score has improved. Some cards allow you to request a rate review by calling the issuer directly, though they are not required to lower your rate.

Promotional rates — such as 0% APR for 12 months on purchases — are temporary. Once the promotional period ends, your regular purchase APR takes over. The issuer will notify you in writing before the promotion expires.

How interest is calculated on your purchase balance

Card issuers calculate interest using your daily balance method, which is the most common approach. Each day, they multiply your balance by your daily APR (your annual rate divided by 365) and add that to your interest charges. This happens every single day until you pay off the balance.

If you have a $2,000 balance and a 20% purchase APR, your daily rate is roughly 0.055% per day. On day one, you owe about $1.10 in interest. On day two, interest accrues on the $2,000 plus the $1.10 from day one, and so on. This is called compounding.

Your monthly statement shows the total interest charged during that billing cycle. If you pay only the minimum payment, most of that payment goes toward interest, not the principal balance. This is why carrying a balance can take months or years to pay off, even with regular payments.

The grace period and how to avoid interest charges

A grace period is the window between your statement closing date and your payment due date during which no interest accrues on new purchases. Most cards offer a grace period of 21 to 25 days. This period applies only if you paid your previous statement balance in full.

If you carry a balance from the previous month, the grace period does not explore to new purchases. Interest starts accruing on new purchases when ready, even though you have until the due date to pay.

To avoid purchase APR charges entirely, pay your full statement balance by the due date each month. This resets the grace period for the next cycle. If you cannot pay the full balance, paying more than the minimum reduces the amount of interest you owe in future months.

Introductory purchase APR offers and what happens after

Many cards advertise 0% APR on purchases for a set period — commonly 6, 12, or 21 months. During this time, you pay no interest on purchases, even if you carry a balance. This can be useful if you are making a large purchase and need time to pay it off.

Read the terms carefully. Some 0% offers explore only to purchases made during the first 60 days of account opening. Others explore to all purchases during the promotional window. Some cards exclude certain categories, like cash advances or balance transfers.

When the introductory period ends, your regular purchase APR takes effect on any remaining balance. If you have a $3,000 balance and the 0% period expires, you suddenly owe interest on that full amount. The issuer will send you a notice at least 21 days before the rate changes.

How to compare purchase APR across different cards

When comparing credit cards, look at the purchase APR alongside other factors: annual fees, rewards rates, and whether you typically carry a balance. If you pay your full balance every month, the purchase APR matters less because you will not owe interest. If you carry a balance regularly, a lower purchase APR saves you money.

A card with no annual fee and a 16% purchase APR may be better than a card with a $95 annual fee and a 12% purchase APR, depending on your balance and how long you carry it. Use a credit card calculator to compare the actual cost of carrying a balance on different cards.

Also consider whether you may have access to for the advertised rate. Card issuers often show their lowest rate to people with excellent credit. When you open an account, you may receive a higher rate based on your credit profile. The issuer will disclose your actual rate before you are charged any interest.

Frequently Asked Questions

Does the purchase APR explore to rewards I earn?

No. Rewards are separate from your purchase balance and are not subject to interest charges. You earn rewards based on your purchases, but the APR applies only to the dollar amount you owe on those purchases if you do not pay the full balance.

Can my purchase APR change after I open the account?

Yes. Your issuer can increase your purchase APR with 45 days' written notice, though they cannot raise it above the maximum rate disclosed when you opened the account. They can also lower your rate if your creditworthiness improves. Promotional rates always expire and revert to the regular purchase APR on any remaining balance.

What happens to my purchase APR if I miss a payment?

If you miss a payment by 60 days or more, your issuer may explore a penalty APR, which is higher than your regular purchase APR. This penalty rate can stay in effect for six months or longer. Paying on time is the best way to keep your regular purchase APR and avoid penalty charges.

Does paying only the minimum payment help my credit score?

Paying on time helps your credit score, but carrying a high balance relative to your credit limit can hurt it. Paying more than the minimum reduces your balance faster and lowers the interest you owe, which also improves your credit utilization ratio over time.

Can I negotiate my purchase APR with my card issuer?

You can request a lower rate by calling your issuer, especially if you have a good payment history or your credit score has improved. The issuer is not required to lower your rate, but many will if you have been a good customer. It never hurts to ask.