Interest is money the bank pays you for letting them use your deposits
When you put money in a savings account, the bank lends that money to other customers — for mortgages, car loans, credit cards, and business needs. In exchange for the use of your money, the bank pays you interest, which is a percentage of your balance. The more you save and the longer you leave it there, the more interest you earn.
The bank decides how much interest to pay you. This rate changes based on what the Federal Reserve does with national interest rates, what other banks are offering, and how much money the bank needs to borrow from customers. You do not negotiate the rate — you either accept what the bank offers or move your money to a bank that offers more.
Interest is real money that appears in your account. It is not a loan you have to repay, and it is not a promotional offer that expires. As long as your account stays open and you keep money in it, the bank keeps paying you interest, though the rate can change.
Key Takeaways
- Banks pay interest as a percentage of your balance, calculated daily but usually added to your account monthly.
- The interest rate varies by bank and account type, and changes when the Federal Reserve raises or lowers national rates.
- High-yield savings accounts pay significantly more interest than standard savings accounts at the same bank.
- Interest compounds over time, meaning you earn interest on the interest you already earned, which grows your balance faster.
- You can compare rates across banks online before opening an account, and switching banks costs nothing if a competitor offers better terms.
How interest rates are set and why they change
The Federal Reserve, which is the central bank of the United States, sets a target range for the interest rate that banks charge each other to borrow money overnight. When the Fed raises this rate, banks typically raise the interest they pay on savings accounts. When the Fed lowers it, banks usually lower savings rates too. This happens because banks want to attract deposits when rates are high and can afford to pay less when rates are low.
Individual banks also set their own rates based on how much money they need. A bank that has plenty of deposits might lower its rate because it does not need to attract more customers. A bank that needs more deposits might raise its rate to stand out. This is why the same account type can pay different rates at different banks — there is no single "savings account rate" that applies everywhere.
Rates change slowly, usually over weeks or months, not overnight. If you lock in a rate today, the bank can change it in the future, but they must notify you in writing before the change takes effect. You are not stuck with a bad rate forever — you can move your money to a bank offering better terms whenever you want.
The difference between standard and high-yield savings accounts
A standard savings account is the basic account most banks offer. The interest rate is usually very low — often less than 0.01 percent per year. This means if you have $1,000 in the account, you might earn less than 10 cents in a year. The tradeoff is that these accounts are straightforward to open, have no minimum balance requirement, and let you withdraw money anytime without penalty.
A high-yield savings account pays much more interest — rates vary, but they are typically between 4 and 5 percent per year, depending on what the Federal Reserve has done recently. The same $1,000 would earn $40 to $50 per year. High-yield accounts are usually offered by online banks or credit unions rather than traditional brick-and-mortar banks, because online banks have lower overhead costs and can pass the savings to customers.
The catch with high-yield accounts is that they often have a higher minimum balance to open (sometimes $500 or $1,000) and may limit how many times per month you can withdraw money without a fee. Some also require you to set up direct deposit or maintain a certain account balance. Read the account terms before opening to know what restrictions explore.
How interest is calculated and added to your account
Banks calculate interest using your average daily balance — the total amount of money in your account each day, averaged over the month. If you had $1,000 for 15 days and $2,000 for 15 days, your average daily balance would be $1,500. The bank applies the interest rate to this average to figure out how much you earn that month.
Interest is usually added to your account once a month, on a date the bank sets. Some banks add it on the last day of the month; others add it on a specific date like the 15th. You can find the exact date in your account agreement or by asking customer service. When interest is added, it becomes part of your balance and starts earning interest itself the next month — this is called compounding.
Compounding is powerful over time. If you earn $10 in interest one month, that $10 earns interest the next month too. The longer you leave money untouched, the more your balance grows from compounding alone. A high-yield account at 5 percent per year will roughly double your money in 14 to 15 years without you adding anything new.
Where to find current interest rates and compare banks
You do not have to visit each bank's website individually. Several free websites list current savings rates across many banks, updated daily. Bankrate, DepositAccounts, and the Federal Deposit Insurance Corporation (FDIC) website all show rates for high-yield savings accounts, money market accounts, and certificates of deposit. You can filter by account type and see which banks are paying the most right now.
When you compare rates, look at the annual percentage yield, or APY. This is the real rate you will earn over a year, including the effect of compounding. It is always listed on the bank's website and in any account agreement. APY is more accurate than the interest rate alone because it shows the total return you will actually get.
Opening a new account at a bank with better rates costs nothing and takes about 10 minutes online. You can keep your old account open while you move money to the new one, or close it once the transfer is complete. There is no penalty for switching banks, and no bank can prevent you from withdrawing your money.
What happens to interest when rates fall or rise
If the Federal Reserve raises rates, banks usually raise their savings rates within a few weeks. Your existing account rate will go up automatically — you do not have to do anything. The bank must notify you of the change, but the notification often comes after the rate has already increased.
If the Federal Reserve lowers rates, banks lower their savings rates too, usually within a few weeks. Your rate will drop automatically. This is when it makes sense to shop around — if your bank's rate falls below what competitors are offering, you can move your money to a bank paying more. Many people do this, and banks expect it.
Rate changes are not sudden surprises. The Federal Reserve announces its decisions publicly, and financial news outlets report on them when ready. If you follow basic financial news or set up rate alerts on comparison websites, you will know when changes are coming and can act before your rate drops.
Interest and taxes
Interest you earn on a savings account is taxable income. At the end of each year, the bank sends you a form called a 1099-INT that reports how much interest you earned. You must report this amount on your tax return, even if it is only a few dollars.
If you earned more than $10 in interest during the year, the bank is required to send you the 1099-INT by January 31. If you earned less than $10, the bank may not send a form, but you still owe tax on the interest. Keep your own records of interest earned so you can report it accurately.
The amount of tax you owe depends on your overall income and tax bracket. Interest is taxed as ordinary income, not at a special rate. This is one reason high-yield accounts matter — earning 5 percent interest instead of 0.01 percent means you earn more money, even after taxes.
Frequently Asked Questions
Can I lose money if interest rates go down?
No. Your account balance never shrinks because of interest rate changes. If rates fall, you straightforward earn less interest going forward — you do not lose what you already earned. Your money is always safe in an FDIC-insured account up to $250,000.
How often should I check my interest rate and consider switching banks?
Check your rate once or twice a year, especially after the Federal Reserve announces a rate change. If your bank's rate has fallen more than 0.5 percent below what competitors are offering, it is worth moving your money. Switching takes 10 minutes and costs nothing.
Is interest the same at every bank?
No. Banks set their own rates based on how much money they need and their operating costs. Online banks usually pay more than traditional banks because they have lower overhead. Rates can differ by 1 percent or more between banks, which adds up to real money over time.
What is the difference between APR and APY?
APR is the interest rate before compounding. APY is the actual return you get after compounding is included. For savings accounts, always use APY to compare banks, because it shows what you will really earn.
Do I have to pay fees to earn interest?
No. Interest is information programs from the bank. However, some accounts charge monthly maintenance fees or fees for excess withdrawals. Read the account terms to understand all fees before opening, and choose an account with no monthly fee if possible.