APR, or annual percentage rate, is the yearly cost of borrowing money expressed as a percentage. It includes not just the interest a lender charges but also certain fees, making it a more complete picture of what a loan or credit card actually costs you. Federal law requires lenders to disclose the APR on every loan offer, which gives you a standardized number to compare when shopping around.
How APR Differs From the Interest Rate
The interest rate is the base cost a lender charges you for borrowing money. The APR takes that interest rate and folds in additional fees the lender charges when the loan is made. On a mortgage, for example, the APR reflects the interest rate plus any points, mortgage broker fees, and origination charges. That means the APR on a mortgage is almost always higher than the advertised interest rate.
This distinction matters most when you’re comparing loan offers side by side. One lender might quote a lower interest rate but charge higher upfront fees, while another quotes a slightly higher rate with minimal fees. Looking at the APR for each offer gives you a single number that captures both elements, so you can see which deal truly costs less over time.
How Credit Card APR Works
Credit card APR works differently from loan APR because credit cards don’t have upfront origination fees baked into the rate. On a credit card, the APR is essentially the interest rate itself, applied to any balance you carry past the grace period (the window between your statement closing date and your payment due date). If you pay your full statement balance every month, you typically pay no interest at all.
When you do carry a balance, most credit card issuers charge interest daily, not annually. They convert your APR into a daily periodic rate by dividing it by 365 (or 360, depending on the issuer). So if your card has a 24% APR, the daily rate is roughly 0.066%. The issuer multiplies that daily rate by your outstanding balance each day, and those daily interest charges add up over the billing cycle. On a $3,000 balance at 24% APR, you’d accumulate about $60 in interest over a 30-day period.
Many credit cards list several different APRs on your account: one for purchases, a higher one for cash advances, and sometimes a promotional 0% APR that applies for an introductory period. Each applies to a different category of transactions, and the cash advance APR often kicks in immediately with no grace period.
Fixed APR vs. Variable APR
A fixed APR stays the same for the life of the loan or for a defined period. Most auto loans and fixed-rate mortgages work this way. Your monthly payment stays predictable because the rate doesn’t move.
A variable APR, on the other hand, changes over time based on a benchmark index tied to broader market conditions. The lender sets a margin when you take out the loan, and that margin stays constant. Your actual rate equals the index value plus the margin. When the index rises, your rate and payment go up. When it falls, they come down. Most credit cards carry variable APRs, as do adjustable-rate mortgages after the initial fixed-rate period ends. Rate caps on adjustable-rate mortgages limit how much the rate can increase in a single adjustment and over the life of the loan, but credit cards generally have no such caps.
What Gets Included in APR
The specific costs rolled into an APR depend on the type of loan. For mortgages, the APR typically includes origination fees, discount points (prepaid interest you pay at closing to lower your rate), and mortgage broker fees. It does not include every closing cost. Title insurance, appraisal fees, and home inspection costs, for instance, are generally excluded.
For personal loans and auto loans, origination fees are the most common addition. Some lenders charge an origination fee of 1% to 8% of the loan amount, deducted from your proceeds before you receive the money. A $10,000 personal loan with a 10% interest rate and a 5% origination fee has an APR noticeably higher than 10%, because you’re paying interest on $10,000 while only receiving $9,500.
For credit cards, the APR and the interest rate are functionally the same number since there are no origination fees. However, annual fees, late fees, and penalty APRs (a higher rate triggered by missed payments) are separate charges not captured in the standard APR.
Why Lenders Must Disclose APR
The Truth in Lending Act requires lenders to show you the APR before you commit to a loan. This rule exists because interest rates alone can be misleading. Two lenders offering “6% interest” might have very different total costs once fees are factored in. The APR forces those hidden costs into the open.
On mortgage loans, you’ll see the APR on your Loan Estimate (provided within three business days of applying) and again on your Closing Disclosure (provided at least three business days before closing). Comparing the APR across Loan Estimates from different lenders is one of the fastest ways to evaluate competing mortgage offers.
How to Use APR When Comparing Offers
APR is most useful when you’re comparing loans with similar structures. Two 30-year fixed-rate mortgages can be compared directly by APR. Two five-year auto loans can be compared the same way. But comparing the APR of a 15-year mortgage against a 30-year mortgage is less straightforward, because the shorter loan spreads its upfront fees over fewer years, making the APR gap between the two look smaller than the actual cost difference.
For credit cards, since the APR is the interest rate, the comparison is simpler. A card with a 20% APR costs less to carry a balance on than a card with 28% APR, full stop. But if you never carry a balance, the APR matters far less than rewards, annual fees, and other card features.
One thing APR doesn’t capture is the total dollar amount you’ll pay over the life of a loan. A loan with a lower APR stretched over more years can cost you more in total interest than a higher-APR loan with a shorter term. When evaluating any borrowing decision, look at both the APR and the total cost of the loan, which lenders are also required to disclose.