Borrowing & Saving
APR vs. APY: What's the Difference?
APR and APY are two of the most confused terms in personal finance — they look almost identical, they're both percentages, and they're often just a single letter apart on the page. But they answer different questions, and mixing them up can cost you real money. The short version: APR is usually what you pay to borrow, and APY is usually what you earn to save — and the key difference between them is compounding. This guide makes the distinction stick.
APR: the cost of borrowing
APR stands for Annual Percentage Rate. It represents the yearly cost of borrowing money, and on loans it's designed to include not just the interest rate but also certain fees, so you can compare offers fairly. You'll see APR on credit cards, mortgages, car loans, and personal loans.
Crucially, the standard APR figure does not account for compounding within the year. It's the simple annualized rate. On a credit card, for example, a 24% APR is applied as a smaller periodic rate (roughly 24% ÷ 365 each day). Because card interest compounds, the effective rate you actually pay if you carry a balance ends up a bit higher than the stated APR.
APY: the reward for saving
APY stands for Annual Percentage Yield. It represents how much you actually earn on savings in a year, and — unlike APR — it does include the effect of compounding. That's why you see APY on savings accounts, money market accounts, and CDs. APY answers the honest question: "If I leave my money here for a year, how much will it really grow?"
A worked example of the difference
Say a rate is "12% compounded monthly." That 12% is the nominal annual rate (the APR-style number). But because interest is added every month and then earns interest itself, the APY works out to about 12.68%. The more often interest compounds, the bigger the gap between the two numbers.
| Compounding frequency | Nominal rate (APR-style) | Effective APY |
|---|---|---|
| Annually | 12% | 12.00% |
| Quarterly | 12% | 12.55% |
| Monthly | 12% | 12.68% |
| Daily | 12% | 12.75% |
This is why you can't fairly compare two products by their headline rate alone — you have to know whether you're looking at a compounding-inclusive number (APY) or not (APR).
How to use this when comparing offers
- Comparing savings accounts or CDs? Compare APY to APY. It already includes compounding, so the higher APY genuinely earns you more.
- Comparing loans or credit cards? Compare APR to APR, and remember the effective cost is slightly higher because of compounding. For mortgages, APR also folds in certain fees, making it more useful than the bare interest rate for comparison.
- Never compare an APR against an APY. That's apples to oranges — the APY will always look bigger for the same underlying rate.
Why lenders and banks pick the flattering number
It's not an accident which term shows up where. A lender wants the cost of borrowing to look small, so it leads with APR (the number that excludes compounding). A bank wants the reward for saving to look big, so it leads with APY (the number that includes compounding). Once you know the trick, the marketing stops working on you — and you can ask for the other number to see the full picture.
Frequently asked questions
- Is a higher APY good or bad?
- For savings, higher is better — you earn more. APY only appears on things that pay you, so a higher number is what you want.
- Is a higher APR good or bad?
- For borrowing, lower is better — APR is what the debt costs you. A lower APR means cheaper borrowing.
- Why does my credit card show an APR but charge interest daily?
- The card takes the APR, divides it into a daily rate, and applies it to your balance each day. Because that interest compounds, the effective annual cost is a little above the stated APR if you carry a balance.
- Does paying my credit card in full avoid interest entirely?
- Usually yes. Most cards have a grace period, so if you pay the statement balance in full each month, you typically pay no interest regardless of the APR.