What Is APY (Annual Percentage Yield)?
APY stands for Annual Percentage Yield. It is the effective annual interest rate that accounts for the effect of compound interest. It is the most honest metric for comparing savings products because it reflects how much you will actually earn in a year.
APY vs APR vs Interest Rate — What Is the Difference?
- Nominal Interest Rate: The base rate before compounding. If a deposit pays 3% nominally with monthly payments, the nominal rate is 3% but the APY will be slightly higher.
- APR (Annual Percentage Rate): Often used for loans. Includes fees but not compounding — can understate the true cost of borrowing.
- APY (Annual Percentage Yield): Includes the effect of compounding. This is what you should use to compare savings accounts. The EU equivalent is TAE (Tasa Anual Equivalente).
How to Calculate APY
The APY formula is:
APY = (1 + r/n)^n − 1
Where r is the nominal annual rate and n is the number of compounding periods per year.
Practical example: A deposit with a 3% nominal rate, compounded monthly:
APY = (1 + 0.03/12)^12 − 1 = 3.04%
The more frequent the compounding, the bigger the difference between nominal rate and APY.
Why APYData Uses APY
APYData displays APY/TAE because it allows fair comparison between products regardless of their compounding frequency. A monthly-paying deposit vs an annual-paying one cannot be directly compared by nominal rate — but they can by APY.
When Higher APY Is Not Always Better
- Fixed-term deposits: Higher term usually means higher APY, but no access to your money.
- Conditional accounts: A 5% APY might require direct debit salary, using the card X times/month, etc.
- Deposit guarantee: An 8% APY in crypto does not carry the same safety as a 3% with €100,000 government-backed guarantee.
→ Compare APY across all products at APYData
Frequently Asked Questions
What is the difference between APY and APR?
APY (Annual Percentage Yield) includes the effect of compound interest and shows your actual annual earnings. APR (Annual Percentage Rate) does not include compounding and is typically used for loans. Always compare savings accounts by APY, not APR.
Does a higher APY always mean more money?
Not necessarily. A higher APY may come with a longer term (no access to your money), usage conditions (direct debit, card usage requirements), or lower deposit guarantee. Always evaluate APY alongside these factors.
How do I calculate how much I will earn with a 3% APY deposit?
Multiply your principal by the APY. With €10,000 at 3% APY for 1 year, you will earn approximately €300 gross before tax. With €1,000 you would earn €30 gross.
Can the APY change over time on flexible accounts?
Yes. On instant-access accounts, the bank can change the APY at any time. On fixed-term deposits, the APY is guaranteed for the entire contracted period.