APR vs APY: What's the Difference for Your Savings?
APR is the plain annual interest rate with no compounding baked in. APY is that same rate after you account for interest earning interest during the year. For savings, APY is the number that tells you what you actually keep, which is exactly why banks quote it. On loans and cards, they quote the leaner-looking APR instead.
What is the difference between APR and APY?
APR is the nominal annual rate a product advertises, with compounding ignored. APY is the effective rate once compounding is counted, so it reflects the interest your interest earns over a full year. They describe the same underlying rate. APY just tells the whole story, and it is always equal to or higher than the APR it came from.
| Term | What it measures | Where you see it |
|---|---|---|
| APR | Nominal rate, no compounding | Credit cards, loans, mortgages |
| APY | Effective rate, includes compounding | Savings, CDs, money market accounts |
The split is not an accident. Under the Truth in Savings Act and its Regulation DD, banks must disclose the APY on deposit accounts so shoppers can compare offers on equal footing. Lending products follow the Truth in Lending Act, which centers on APR. The number you are shown is the one that flatters the pitch: the higher APY when you earn, the lower APR when you borrow.
How do you calculate APY from an interest rate?
Use one formula: APY = (1 + r/n) raised to the power n, minus 1. Here r is the nominal rate as a decimal and n is the number of compounding periods in a year. Twelve means monthly, 365 means daily. Run a 4% rate through it and daily compounding lands at 4.081%.
- Write the APR as a decimal — a 4% rate becomes 0.04.
- Divide by the periods per year — daily compounding is 0.04 ÷ 365 = 0.00010959.
- Add 1, then raise to that power — 1.00010959 to the 365th power = 1.04081.
- Subtract 1 — 1.04081 − 1 = 0.04081, so the APY is 4.081%.
Why does more frequent compounding raise the APY?
Each time interest posts, it joins your balance and starts earning on its own. Compound more often and that hand-off happens sooner and more times, so a little extra interest piles up by December. The rate stays fixed; the schedule is what nudges the yield higher. The table below holds a 4% rate steady and only changes how often it compounds.
| Compounding | Periods (n) | APY on a 4% rate |
|---|---|---|
| Annually | 1 | 4.000% |
| Semi-annually | 2 | 4.040% |
| Quarterly | 4 | 4.060% |
| Monthly | 12 | 4.074% |
| Daily | 365 | 4.081% |
How big does the gap between APR and APY get?
The gap grows with the rate. At 4% the daily-versus-annual difference is roughly eight hundredths of a percent. Push the rate to 5% and daily compounding gives a 5.127% APY, a wider spread. On high-rate products like credit cards, where APRs sit above 20%, the gap turns into real money.
That is the same math as savings, just aimed at you instead of for you. On a deposit account, daily compounding is a quiet gift. On a revolving balance, it is a quiet tax. Either way, the effective annual figure, not the nominal APR, is the honest one. If you want to see how a balance snowballs over months and years, the compound interest growth calculator plots it out.
What savings rates should you compare in 2026?
Compare APY to APY, never a rate to a yield. As of July 2026 the national average savings APY sits near 0.38% by FDIC data, while the best high-yield savings accounts pay roughly 4.00% to 4.21% APY. That is about ten times the average, and the difference is all in where you park the cash, not in some compounding trick.
| Account type | Typical APY (July 2026) |
|---|---|
| National average savings | ~0.38% |
| Big-bank standard savings | 0.01%–0.10% |
| High-yield savings (HYSA) | 4.00%–4.21% |
| Promotional / new-account APY | up to ~5.00% |
The headline number banks print is already the APY, so you rarely have to convert anything when shopping for savings. Where the conversion matters is when a product quotes a bare rate, or when you are checking a loan's APR against what it really costs. To flip a nominal rate into its true yield in one step, enter the rate and compounding frequency in the APY from APR calculator and read the effective annual figure straight off.
Frequently asked questions
Is APY always higher than APR?
APY is higher whenever interest compounds more than once a year, which covers almost every real account. If compounding is annual, APY and APR are exactly equal. They can never invert: for the same nominal rate, APY is greater than or equal to APR, never less.
Why do savings accounts show APY but credit cards show APR?
Regulation matters, and so does marketing. The Truth in Savings Act requires deposit accounts to disclose APY, while the Truth in Lending Act centers on APR for credit. Conveniently, the higher APY makes a savings offer look better and the lower APR makes a loan look cheaper.
Does a bank have to tell me the APY?
Yes. Under Regulation DD, which implements the Truth in Savings Act, banks must disclose the APY along with the interest rate and fees before you open an account and on your statements. That standardization is what lets you compare one savings account against another fairly.
How do I turn a monthly rate into an annual APY?
Multiply the monthly rate by 12 to get the nominal annual rate, then apply APY = (1 + r/12) to the 12th power minus 1. A 0.333% monthly rate is a 4% nominal rate, which comes out to about a 4.074% APY once you compound the twelve months.
Should I pick the account with the highest compounding frequency?
Not by itself. At today's savings rates, the gap between daily and monthly compounding is a few basis points, far smaller than the gap between a 0.38% average account and a 4% high-yield one. Chase the higher APY first; treat compounding frequency as a tiebreaker.
Is the APR on my credit card the real cost of carrying a balance?
No, it slightly understates it. Card interest compounds daily, so a 22% APR translates to roughly a 24.6% effective annual rate if you carry a balance all year. The APR is the sticker; the effective rate is what actually accrues.
Can a lower rate beat a higher one because of compounding?
Only in rare, narrow cases where the lower-rate account compounds far more often, and the effect is tiny. The safe habit is to compare APY to APY. Once both are expressed as yields, compounding is already inside the number and the higher one wins.
Once the labels click, the rest is easy: for savings you compare APY to APY and take the biggest one, and for debt you remember the APR is the floor, not the ceiling, of what you pay. When a product gives you only a nominal rate, drop it into the APY from APR calculator to see the true annual yield before you commit.