What is APR on a credit card and how does it affect what I pay?

APR stands for Annual Percentage Rate — it is the annualized cost of carrying a balance on a credit card. If you pay your statement balance in full every month, APR is irrelevant: you pay zero interest. If you carry a balance, the APR determines your daily interest charge. The average credit card APR in the U.S. is currently around 21–22%, according to Federal Reserve data.

APR — Annual Percentage Rate — is the yearly interest rate applied to any credit card balance you don't pay off by the statement due date. Under the Truth in Lending Act (TILA), card issuers are required to disclose your APR prominently on statements and in application materials. The CFPB's credit card agreements database publishes the terms (including APRs) for thousands of U.S. credit cards.

How credit card APR actually charges you

Credit cards use daily periodic rate math, not annual math. The daily rate is your APR divided by 365. Each day you carry a balance, that rate is applied to your outstanding balance. At the end of the billing cycle, all daily charges are summed — this is your interest charge for that month. At a 20% APR, your daily rate is 0.0548%. A $1,000 balance carried for a full 30-day cycle costs approximately $16.44 in interest that month.

Types of credit card APR

• Purchase APR: Applied to new purchases if you carry a balance. This is the rate most people refer to as 'the APR.'
• Balance transfer APR: Applied to balances transferred from other cards. Often offered at a promotional 0% rate for 12–21 months, then reverts to a standard rate.
• Cash advance APR: Typically higher than the purchase APR (often 25–30%) and begins accruing immediately — no grace period.
• Penalty APR: A higher rate (often 29.99%) triggered by two missed payments in a six-month window. The CFPB regulates how long issuers can keep the penalty APR in place.
• Introductory/promotional APR: A temporary rate (often 0%) for a defined period. After the promotional window ends, the standard APR applies to any remaining balance.

The grace period: when APR doesn't matter

If you pay your statement balance in full by the due date, you pay zero interest — regardless of your APR. This is the grace period: credit cards are legally required to give you at least 21 days between statement close and payment due date, during which no interest accrues on purchases. The CFPB's guide to credit card interest confirms this structure. Cardholders who pay in full every month treat their cards as free 30-day float loans.

What is a good credit card APR?

The Federal Reserve publishes average credit card interest rates monthly via its H.15 Selected Interest Rates release. As of 2026, the average rate on accounts with balances is approximately 21–22% APR. Cards with strong credit requirements (720+ FICO) often start below 20%. Low-interest cards (credit unions, certain bank products) may offer 12–18% APRs. If you carry a balance, the lower the APR, the less you pay — but the best financial outcome is always paying the full balance to avoid interest entirely.

Credit card APR benchmarks

• The Federal Reserve H.15 release tracks average credit card interest rates on accounts assessed interest — currently running approximately 21–22% APR as of 2026. — Federal Reserve H.15 — Selected Interest Rates
• Under the Credit CARD Act of 2009, card issuers must give at least 45 days' advance notice before increasing a cardholder's APR, and the higher rate can generally only apply to new purchases (not the existing balance). — CFPB — Credit CARD Act

Related

• What is APR vs interest rate on a loan?
• What is a good APR for a credit card?
• What is a variable APR on a credit card?
• What is a penalty APR on a credit card?
• How Promotional APR Works: Use a 0% Intro Card Right 2026

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