Banks pay you interest by giving you a percentage of your account balance each month or year
When you keep money in a savings account, the bank uses that money to lend to other customers — for mortgages, car loans, and business loans. In exchange, the bank pays you a small percentage of your balance as interest. This is how you earn money just by letting your account sit there.
The amount you earn depends on two things: how much money you have in the account, and what interest rate the bank is offering. The interest rate is expressed as a percentage — for example, 4.5% per year. A higher rate means you earn more money on the same balance.
Interest gets added to your account automatically on a schedule set by the bank — usually monthly or daily. You do not have to do anything to earn it. Once interest is added, it becomes part of your balance, and you earn interest on that new total the next time around. This is called compound interest, and it means your money grows a little faster over time.
Key Takeaways
- Interest rates on savings accounts vary by bank and change over time, so comparing rates before opening an account can mean earning significantly more money on the same balance.
- Online banks typically offer higher interest rates than brick-and-mortar banks because they have lower operating costs.
- Interest is usually added to your account monthly or daily, and once it is added, you earn interest on that interest in the next period.
- The amount you earn depends only on your balance and the rate — you cannot negotiate a higher rate or earn interest faster by doing anything special with the account.
How the interest rate is set and why it changes
Banks set their own interest rates based on what the Federal Reserve does with something called the federal funds rate. When the Federal Reserve raises its rate, banks usually raise the rates they offer on savings accounts. When the Federal Reserve lowers its rate, banks usually lower savings rates too. This happens because banks' own costs change, and they adjust what they pay you accordingly.
You will see savings rates change several times a year. A rate that is 4.5% today might be 3.8% in six months, or it might go up to 5.2%. This is normal and expected. The rate you get when you open the account is not locked in — it can change at any time after that, and the bank will notify you of changes.
Different banks offer different rates even when the Federal Reserve rate is the same. Online banks often offer higher rates than traditional banks because they do not have the cost of physical branches. Credit unions sometimes offer competitive rates too. Shopping around before you open an account is worth the time, because the difference between a 4% rate and a 5% rate adds up over years.
How much interest you actually earn
The easiest way to understand your earnings is to use an example. If you have $10,000 in an account with a 4% annual interest rate, and the bank compounds interest monthly, you would earn roughly $400 in the first year. That $400 gets divided into twelve monthly payments of about $33 each, added to your account each month.
In the second year, you earn interest on $10,400 (your original balance plus the interest from year one), so you earn slightly more than $400 that year. The difference is small at first, but it grows over time. After ten years, compound interest means you have earned more than $4,800 on that original $10,000 — not just $4,000.
Most banks show you what you will earn before you open the account. They use a calculator or a disclosure document that shows your projected balance after one year, assuming the rate stays the same and you do not add or withdraw money. This number is helpful for comparing accounts, but remember that rates change, so your actual earnings might be higher or lower.
The difference between APY and interest rate
Banks use two terms that sound similar but mean different things: interest rate and APY (which stands for Annual Percentage Yield). The interest rate is the percentage the bank pays. The APY is what you actually earn when you account for compound interest.
For example, a bank might advertise a 4% interest rate that compounds daily. Because of daily compounding, your actual earnings work out to about 4.08% APY. The APY is always equal to or higher than the interest rate, depending on how often the bank compounds. When you are comparing accounts, use the APY number — that is the real number that tells you what you will earn.
Why some accounts earn more than others
A high-yield savings account is straightforward a savings account with a higher interest rate than a regular savings account at the same bank. There is no trick or catch — the bank just pays more. Most high-yield accounts are offered by online banks, which can afford to pay more because they have lower costs.
Some banks offer slightly higher rates if you keep a minimum balance in the account — for example, you might get 4.5% if you keep at least $25,000 in the account, but only 3.8% if you keep less. Read the account terms before you open it to see if there are conditions like this.
Money market accounts sometimes offer higher rates than regular savings accounts, but they usually come with limits on how many times you can withdraw money per month. A certificate of deposit (CD) locks your money away for a set period — three months, one year, five years — and pays a higher rate in exchange. You cannot withdraw the money early without a penalty, so CDs are best for money you know you will not need for a while.
What happens to your interest if you withdraw money
If you withdraw money from your savings account, you stop earning interest on that amount. For example, if you have $10,000 earning 4% and you withdraw $3,000, you now earn interest only on the remaining $7,000. The interest you already earned stays in your account — you do not lose it — but future interest is calculated on the smaller balance.
Some banks have rules about how many withdrawals you can make per month before they charge a fee or close the account. These rules vary widely, so check your account agreement. Most online banks have removed these limits, but some traditional banks still have them.
How to find the best rate for your situation
Start by checking what rate your current bank is offering on savings accounts. Then visit the websites of three to five online banks and note their current rates. Websites like Bankrate, DepositAccounts, and the Federal Deposit Insurance Corporation (FDIC) website list rates from many banks in one place, which makes comparison easier.
Pay attention to the APY, not just the interest rate. Check whether there is a minimum balance requirement and whether the rate is may provide or can change. Read the account agreement to see if there are withdrawal limits or monthly fees. Once you have narrowed it down to two or three accounts, open the one with the highest APY that fits your needs.
Remember that rates change frequently. An account that offers the best rate today might not in three months. You do not need to switch accounts constantly, but it is worth checking rates once a year to see if you are still getting a competitive rate.
Frequently Asked Questions
Do I have to pay taxes on the interest I earn?
Yes. Interest earned on a savings account is considered income by the IRS. At the end of each year, your bank sends you a form called a 1099-INT that reports how much interest you earned. You report this on your tax return. The amount of tax you owe depends on your overall income and tax bracket.
Can I lose money in a savings account?
No. Your balance can only stay the same or go up (because of interest). The FDIC insures savings accounts up to $250,000 per person per bank, so even if the bank fails, your money is protected. You cannot lose your principal balance in a savings account.
Why is the interest rate so low right now?
Interest rates on savings accounts follow what the Federal Reserve does with its own rates. When the Federal Reserve lowers rates to stimulate the economy, banks lower savings rates too. Rates change over time based on economic conditions, so what is "low" today might be "high" in a few years.
What if I want to earn more interest than a savings account offers?
A certificate of deposit (CD) pays more interest than a savings account, but your money is locked away for a set period. A money market account sometimes pays more but may have withdrawal limits. If you have a longer time horizon and can accept some risk, other investments like bonds or stock market index funds historically earn more over time, but they can also lose value.
Does it matter which bank I choose if the rates are the same?
If two banks offer the same APY, check whether one has a lower minimum balance requirement, fewer fees, or better customer service. You also want to make sure the bank is FDIC-insured. Beyond that, the choice comes down to which bank is easiest for you to use.