What is APR (annual percentage rate)?

APR vs. Interest Rate: What's the Difference?

The terms "APR" and "interest rate" are often used interchangeably in everyday conversation, but they measure different things — and the difference matters when comparing loan offers.

• Interest rate: The percentage charged on the principal balance. A 6% interest rate on a $200,000 mortgage means you pay $12,000 per year in interest (simplified).
• APR: The interest rate plus mandatory fees, expressed as an annualized percentage. For a mortgage, APR includes origination fees, discount points, mortgage insurance, and certain closing costs. A mortgage with a 6% interest rate might have a 6.35% APR after fees are factored in.

For credit cards, APR and interest rate are effectively the same because credit cards don't typically charge upfront origination fees. When you see a credit card at "20.97% APR," that is the interest rate applied to your outstanding balance.

The federal Truth in Lending Act (TILA), carried out through Regulation Z, requires lenders to show the APR in a standard format on consumer credit the law covers, at set points in the lending process. This was specifically designed to prevent lenders from advertising low interest rates while hiding costs in fees. Say one mortgage offer is 5.75% with high fees and another is 6.0% with low fees. The APR helps you compare the cost of borrowing when the loans have similar terms and assumptions.

Types of APR

Not all APRs are created equal. Understanding the different types prevents costly surprises:

• Fixed APR: Does not change based on market conditions. Common in personal loans, auto loans, and some mortgage products. The rate is locked for the loan's term, providing payment predictability.
• Variable APR: Tied to a benchmark rate — almost always the prime rate for consumer products. Most credit cards use variable APR, calculated as prime rate + issuer's margin. When the Federal Reserve raises rates, your credit card APR increases automatically without notice. The prime rate moves with the Federal Reserve's target rate.
• Introductory (promotional) APR: A temporarily reduced rate — often 0% — offered for a set period (12-21 months) on balance transfers or new purchases. After the promotional period, the standard variable APR applies to any remaining balance.
• Penalty APR: A punitive rate triggered by specific violations, typically paying 60+ days late. Penalty APRs can reach 29.99% and may apply to both new purchases and existing balances. Under the CARD Act, card issuers must review a covered penalty APR increase at least every 6 months and lower the rate when that review shows it should come down.
• Cash advance APR: A higher rate (typically 25-29%) applied to cash withdrawals from a credit card. Interest begins accruing immediately — there is no grace period for cash advances.

How the Current APR Environment Affects Households

The average credit card APR was 15.09% in February 2019 and 20.97% in November 2025. The Federal Reserve publishes the rate without giving a cause for its moves.

The impact on households carrying balances is direct and measurable:

• A $5,000 balance at 15.09% APR costs $63 per month in interest. At 20.97%, it costs $87 per month — $24 more per month, or $288 per year, for the same debt.
• Credit card balances totaled $1.26 trillion in Q2 2026, according to the Federal Reserve Bank of New York.
• Higher APRs make minimum payments less effective — more of each payment goes to interest, less to principal, extending repayment timelines.

This dynamic is a core driver of the financial stress the American Distress Index measures. The debt service ratio was 11.11% of disposable income in Q2 2026, the personal savings rate was 3.8% in September 2026, and credit card delinquency was 2.85% in Q2 2026. A higher APR doesn't create debt, but it makes an existing balance harder to pay down.

How to Use APR When Comparing Loans

APR is the single most useful number for comparing the true cost of borrowing:

• Mortgages: Compare APRs, not advertised interest rates. A lower rate with higher fees may cost more than a slightly higher rate with lower fees. The APR reveals the truth.
• Personal loans: Check whether the APR includes origination fees (1-8% of the loan amount). Some lenders deduct the fee from your disbursement; others add it to the balance.
• Auto loans: Dealer financing may advertise low rates but add fees that increase APR. Compare the dealer's APR to a credit union or bank pre-approval.
• Credit cards: Compare the purchase APR for ongoing use. If doing a balance transfer, compare the promotional APR period length and the post-promotional APR, plus the transfer fee.