APR vs APY: What Each One Really Means
APR and APY differ by one letter and by an entire direction. APR is about borrowing — the cost of a loan, fees included. APY is about saving — the yield on a deposit, compounding included. Confusing them is easy because banks quote both as percentages, but they measure opposite sides of the same transaction. This guide defines each one precisely, shows how each is calculated, and works both examples with real numbers.
The one-line summary: when you borrow, compare APRs and lower wins; when you save, compare APYs and higher wins. Everything below explains why that works.
APR: the true price of borrowing
APR — annual percentage rate — answers the question a loan's interest rate alone cannot: what does this borrowing actually cost per year, including the fees you must pay to get it? Two loans can quote the same 8% rate while one charges $300 in origination fees and the other charges nothing. The interest rate calls them equal; APR does not. It spreads the fees into the rate, producing a single number that reflects the loan's total price, which is exactly why US law requires lenders to disclose it.
APR is calculated by working backwards from the payments. You receive less than the loan amount (the amount minus fees), but your payments are calculated on the full amount. The rate that makes those payments equivalent to what you actually received is the APR — and it is always higher than the stated rate when fees exist, and equal to it when they do not.
Worked example 1: an 8% loan whose APR is 10.08%
Suppose you borrow $10,000 for 3 years at a stated rate of 8%, and the lender charges a $300 origination fee, deducted from your proceeds — so $9,700 actually reaches you, while your payments are based on the full $10,000:
| Monthly payment (on the full $10,000) | $313.36 |
| Amount you actually receive | $9,700.00 |
| Total of 36 payments | $11,281.09 |
| Stated interest rate | 8.00% |
| APR — the true cost, fees included | 10.08% |
A $300 fee on a short, small loan moves the true cost by more than two full percentage points. The lesson generalizes: fees hurt most on small loans and short terms, because there is less interest for them to hide inside. When two lenders quote you rates, ignore the stated rate entirely and compare the APRs — that is what they are for.
APY: the true yield on saving
APY — annual percentage yield — solves the mirror-image problem for deposits. A savings account might quote a 5% rate compounded monthly. But because interest is credited monthly and then itself earns interest, you end the year with more than 5% growth. APY is that effective growth rate, compounding included. It exists so you can compare a monthly-compounding account against a daily-compounding one without doing the exponent math yourself.
Worked example 2: a 5% rate that yields 5.12%
Take a stated rate of 5% and compound it three ways. Quarterly compounding gives an APY of 5.095%. Monthly compounding gives 5.116%. Daily compounding gives 5.127%. Put $10,000 in the monthly account and it grows to $10,511.62 in a year — $511.62 of interest, not the $500 the headline rate suggests. The differences between frequencies are small (that is normal), but the gap between the stated rate and the APY is always in the saver's favor, and APY is the only number that lets you compare two accounts honestly at a glance.
The traps to avoid
Comparing an APR to an APY. It happens constantly in marketing: a loan advertised by its low APR next to an investment promoted by its high APY. They are not the same kind of number. Credit card APRs work slightly differently — they usually exclude some fees and compound daily, so a card's real cost can exceed its APR; treat card APR as a floor. Teaser rates quote the introductory APR, not the one you will pay for most of the loan's life. And on the saving side, an APY assumes the money stays put for a full year with no withdrawals — early-withdrawal penalties on CDs can erase the yield advantage entirely.
Convert your own numbers
To see the fee effect on a loan you are considering, use the APR Calculator — enter the amount, rate, term, and fees and it returns the true APR. To compare savings accounts, the APY Calculator converts any stated rate and compounding schedule into the yield you will actually earn.
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Frequently asked questions
What is the difference between APR and APY?
APR measures the cost of borrowing, including lender fees, expressed as a yearly rate. APY measures the yield on a deposit, including compound interest, expressed as a yearly rate. APR is for loans where lower is better; APY is for savings where higher is better.
Why is APR higher than the interest rate on my loan?
Because APR folds mandatory fees — origination, closing, and similar charges — into the rate. You receive the loan amount minus fees but repay on the full amount, so the effective cost per year rises. With zero fees, APR and the stated rate are identical.
Why is APY higher than the interest rate on my savings account?
Because APY includes compounding: interest credited during the year itself earns interest. A 5% rate compounded monthly yields 5.116% over a full year. The more frequent the compounding, the slightly higher the APY.
Which number should I compare when choosing a loan?
Always the APR, and ideally the total dollar cost too. Two loans with the same stated rate can have very different APRs once fees are counted. For the loan in our example, an 8% rate with a $300 fee is really a 10.08% APR — more expensive than a fee-free 9.5% loan.
Do credit card APRs include all fees?
Not entirely. Card APRs are based on the interest rate and exclude some charges such as annual fees and late fees, and interest typically compounds daily. That makes a card's true cost potentially higher than its APR — another reason card balances are the most expensive common debt.