Purchase APR is the interest rate charged when you carry a balance on everyday credit card purchases

Purchase APR is the yearly interest rate your credit card company charges you when you don't pay off your full balance by the due date. If you buy something for $100 and don't pay it back in full, the card issuer charges you interest on that $100 at the purchase APR rate. This is the most common type of APR on a credit card because it applies to regular shopping — groceries, gas, clothes, restaurants, anything you buy with the card.

The key thing to understand: purchase APR only kicks in if you carry a balance. If you pay your full statement balance by the due date each month, you pay zero interest, even if your purchase APR is 20 percent. The interest only starts accruing on the day your payment is due and you don't make it.

Purchase APR varies by card and by person. A card might offer 15 percent APR to one applicant and 22 percent to another, depending on credit history and income. Some cards have a promotional rate — like 0 percent for 12 months — before the regular purchase APR kicks in.

Key Takeaways

  • Purchase APR is charged only on balances you carry past the due date; paying in full each month means you pay no interest.
  • The rate you receive depends on your credit score and history, and different cards offer different rates.
  • Interest accrues daily on the unpaid balance, so the longer you carry a balance, the more you owe.
  • Some cards offer a promotional 0 percent purchase APR for a set period before the regular rate begins.

How the interest actually gets calculated

Credit card companies calculate daily interest by dividing your APR by 365 (or sometimes 360), then multiplying that daily rate by your unpaid balance each day. If your purchase APR is 18 percent and you have a $1,000 balance, the daily rate is roughly 0.049 percent. That gets applied to your $1,000 balance, adding about $0.49 in interest that day. The next day, if you still owe $1,000, another $0.49 gets added.

This is why the balance grows faster the longer you carry it. The interest compounds — meaning you pay interest on the interest from previous days. A $1,000 balance at 18 percent APR costs you roughly $15 in interest per month if you make no payments. After three months of no payments, you owe closer to $1,046.

Your statement shows the interest charged during that billing cycle, usually listed as "interest charges" or "finance charges." This amount gets added to what you owe.

The difference between purchase APR and other card rates

Credit cards can have different APRs for different types of transactions. Cash advance APR is usually higher than purchase APR — sometimes 5 to 10 percentage points higher — and starts accruing immediately with no grace period. Balance transfer APR applies when you move debt from one card to another and is often lower than purchase APR, sometimes with a promotional period.

Your card's purchase APR is what matters for regular spending. If your card shows "APR: 19.99%," that refers to purchases unless the card issuer specifies otherwise.

Why your purchase APR might change

Your card issuer can raise your purchase APR, but they must give you at least 45 days' notice in writing. Common reasons include a late payment, a significant drop in your credit score, or simply a decision by the card company to adjust rates. Some cards have a variable APR that moves up or down based on the prime rate set by the Federal Reserve.

You can also negotiate a lower rate by calling your card issuer, especially if you have a good payment history. They won't always lower it, but asking costs nothing.

How to avoid paying purchase APR

The simplest way is to pay your full statement balance by the due date each month. Your statement shows the total amount due and the date it's due. If you pay that full amount, no interest charges apply, regardless of how high your APR is.

If you can't pay the full balance, paying more than the minimum still helps. The minimum payment covers only a small portion of interest and principal, so your balance shrinks slowly. Paying double or triple the minimum reduces how much interest you owe over time.

Another option is a 0 percent promotional APR offer. Many cards give new cardholders 0 percent purchase APR for 6 to 21 months. If you transfer an existing balance or make new purchases during that period, no interest accrues. Once the promotional period ends, the regular purchase APR takes over.

What happens if you only pay the minimum

Paying only the minimum payment keeps you in debt longer and costs you significantly more in interest. If you have a $5,000 balance at 18 percent APR and pay only the minimum (usually 1 to 3 percent of the balance), it can take years to pay off, and you'll pay thousands in interest charges.

Credit card statements are required to show you how long it will take to pay off your balance if you pay only the minimum, and how much interest you'll pay. This number is often eye-opening and can motivate you to pay more.

Frequently Asked Questions

Does purchase APR apply if I pay late but still pay the full balance?

No. If you pay the full statement balance, you pay no interest, even if you pay after the due date. However, you may face a late fee. The interest only applies to any portion of the balance you don't pay.

Can I get a lower purchase APR on my current card?

Yes, you can call your card issuer and ask. If you have a good payment history and your credit score has improved, they may lower your rate. They're not required to, but many will negotiate to keep you as a customer.

What's the difference between APR and interest rate?

APR is the yearly rate. Interest rate can refer to the same thing, but APR specifically includes any fees the card issuer charges, expressed as a yearly percentage. For credit cards, the terms are usually used interchangeably.

If I transfer a balance to a new card with 0 percent APR, do I still owe interest on the old card?

No. Once the balance is transferred, you owe nothing more to the old card on that amount. The new card's 0 percent APR applies to the transferred balance. Just make sure you understand when the promotional period ends and what the regular APR will be.