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Short answer: APR vs APY compares two different annual percentages. APR is commonly used for borrowing cost, while APY describes deposit yield after compounding. APR may include certain loan fees; APY includes the effect of compounding. Compare APR with APR for loans and APY with APY for savings.
APR vs APY in one table
| Question | APR | APY |
|---|---|---|
| Full term | Annual percentage rate | Annual percentage yield |
| Common product | Loans and credit cards | Savings accounts and certificates |
| Compounding in the displayed rate | Not usually expressed as effective annual compounding | Yes |
| Fees | May include specified finance charges, depending on product and law | Account fees can still reduce the dollars you keep |
| Best comparison | APR to APR with the same loan assumptions | APY to APY with the same balance and conditions |
The Consumer Financial Protection Bureau explains that a mortgage interest rate is the borrowing rate, while APR is a broader measure that includes the rate plus certain charges. For deposits, U.S. Regulation DD defines APY as a percentage reflecting total interest based on the interest rate and compounding frequency for a 365-day period.
APY formula
APY = (1 + r ÷ n)n − 1
Here, r is the nominal annual rate as a decimal and n is the number of compounding periods per year.
Suppose a savings account pays a 5.00% nominal rate and compounds monthly:
(1 + 0.05 ÷ 12)12 − 1 = 0.05116, or an APY of about 5.116%.
On $10,000, that is about $511.62 of interest over one year if the rate and balance remain constant and there are no withdrawals, taxes, or fees.
APR loan example
Imagine a one-year $10,000 loan with $500 of interest and a $100 finance charge included in the APR calculation. The borrower’s dollar cost is $600, but the exact disclosed APR depends on payment timing and the product’s regulatory calculation—not simply $600 ÷ $10,000.
This is why the advertised interest rate can be lower than the APR. Ask for the official disclosure and compare loans with the same amount, term, repayment schedule, points, and fee assumptions.
Why a higher APY can be good and a lower APR can be good
- Savings: a higher APY generally means more interest earned, all else equal.
- Borrowing: a lower APR generally means a lower annualized cost, all else equal.
- Credit cards: daily periodic rates, balances, grace periods, and fees determine actual interest.
- Mortgages: APR can help compare cost, but it may assume the loan is held for its full term.
Four comparison mistakes to avoid
- Comparing a loan APR to a savings APY. They describe different sides of a financial transaction.
- Ignoring conditions. A promotional APY may require a minimum balance, direct deposit, or limited term.
- Looking only at the percentage. Dollar fees, term, balance, early-withdrawal penalties, and variable rates matter.
- Assuming the rate will remain constant. Many cards, loans, and accounts have variable rates.
For growth projections, use the compound interest calculator. Enter the actual compounding frequency and contribution pattern rather than relying on a headline rate alone.
Sources
Frequently asked questions
Is APR or APY higher?
For the same nominal rate with positive compounding, APY is higher. But a loan APR and deposit APY from unrelated products should not be compared.
Does APR include every loan fee?
No. Which charges enter APR depends on the product and applicable rules. Review the official disclosure and total payment schedule.
Does APY include account fees?
APY measures interest and compounding. Maintenance or transaction fees can still reduce the net dollars kept.
Can APY change?
Yes. Variable-rate savings APYs can change. A fixed-term certificate may lock the rate for a stated period, subject to its terms.
Which rate should I use in a compound-interest calculator?
Use the nominal annual rate with its actual compounding frequency, or convert carefully from APY. Do not enter an APY as a monthly-compounded nominal rate or compounding will be counted twice.
This article is general education, not a loan offer, savings recommendation, or financial advice.