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How Does an HYSA Make Money?
How Does an HYSA Make Money?
When you deposit money into a high-yield savings account, the financial institution pays you interest for keeping your money in the account.
The amount you earn depends primarily on:
How much money you have in the account
The account's interest rate and APY
How often interest is compounded
How long your money remains in the account
Whether you add or withdraw money
The interest the bank pays becomes part of your account balance. When interest is calculated again, you may begin earning interest on both your original money and previously earned interest.
That's compound interest.
Compound Interest in Action
Compound Interest in Action
Let's say you deposit $1,000 into a savings account.
If your account earns interest, the bank adds those earnings to your balance.
For a simplified example:
Starting Balance: $1,000
Interest Earned: $30
New Balance: $1,030
The next time interest is calculated, you can earn interest on the $1,030, not just your original $1,000.
Over time, this creates a cycle:
Your Money → Earns Interest → Interest Is Added → Your New Balance Earns Interest → Repeat
The longer money remains in the account, the more opportunity it has to compound.
Important: APYs Can Change
Important: APYs Can Change
Most HYSAs have variable interest rates, meaning the rate and APY can increase or decrease. An account offering a certain APY today is not necessarily guaranteed to offer that same APY in the future.
This is why you should always check the financial institution's current rates and account terms.
Activity: Watch Your Money Compound
Activity: Watch Your Money Compound
Use the Investor.gov Compound Interest Calculator.
Enter:
Initial Investment: $1,000
Monthly Contribution: $0
Length of Time: 5 years
Estimated Interest Rate: 3%
Compound Frequency: Annually
Record your result.
Then change only the length of time:
10 years: $__________
20 years: $__________
30 years: $__________
Think About It
Think About It
What happened to your money as you gave it more time to compound?
Why do you think time matters when earning compound interest?
This activity uses a fixed interest rate to demonstrate compound interest. Actual HYSA rates are generally variable and may change over time.
Sources & Further Reading
Sources & Further Reading
Consumer Financial Protection Bureau — Savings Accounts and Interest
Investor.gov — Compound Interest Calculator
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