Yes, savings accounts build interest, but the amount depends on the rate your bank offers
A savings account builds interest when your bank pays you a percentage of the money you keep deposited there. The bank takes your deposits, lends that money to other customers, and shares a portion of what it earns back to you as interest. The more money you have in the account and the higher the interest rate, the more interest you accumulate over time.
Interest rates vary widely. A traditional savings account at a large national bank might offer 0.01% annual percentage yield (APY), meaning you earn almost nothing. A high-yield savings account at an online bank might offer 4% to 5% APY, meaning you earn substantially more. The difference between these two rates is real money — on a $10,000 deposit, 0.01% earns $1 per year, while 4.5% earns $450 per year.
Interest is usually calculated daily but paid monthly or quarterly. That means your balance grows a little bit each day, even if you do not add new money. This is called compound interest — you earn interest on your original deposit, and then you earn interest on the interest you have already earned.
Key Takeaways
- Savings accounts earn interest at a rate set by your bank, expressed as an annual percentage yield (APY), which varies from nearly 0% at large banks to 4% or higher at online banks.
- Interest is calculated on your daily balance and compounds, meaning you earn interest on the interest you have already accumulated.
- The actual dollars you earn depend on three things: how much money you deposit, how long you leave it there, and what APY your bank pays.
- High-yield savings accounts at online banks currently pay much more than traditional savings accounts, but rates change and can go up or down.
- You can compare rates across banks before opening an account, and you can move your money to a higher-paying account if your current bank's rate drops.
How interest rates are set and why they change
Banks set their own interest rates based on what the Federal Reserve does. When the Federal Reserve raises its benchmark interest rate, banks have more room to pay higher rates on savings accounts. When the Federal Reserve lowers its rate, banks typically lower what they pay you. This is why savings account rates have changed significantly over the past few years — the Federal Reserve raised rates sharply starting in 2022, and banks responded by offering higher rates on savings accounts.
Different banks pay different rates even when the Federal Reserve rate is the same. Online banks typically pay more than brick-and-mortar banks because they have lower overhead costs. A bank with physical branches in every city has to pay for buildings, staff, and utilities, so it keeps more of its earnings and pays you less. An online bank with no branches can pass more of its earnings to depositors.
Rates can change at any time. Your bank can lower the rate it pays you without warning, though it must notify you before the change takes effect. If your bank's rate drops and you want to earn more, you can move your money to a different bank that pays a higher rate. There is no penalty for moving money out of a savings account.
What you actually earn: calculating interest on your balance
The amount of interest you earn is straightforward to calculate. Multiply your account balance by the APY, then divide by 365 (the number of days in a year). That gives you the interest you earn per day. Most banks then multiply that daily amount by the number of days in the month and deposit it into your account.
Here is a concrete example. If you have $5,000 in a savings account earning 4.5% APY, you earn about $225 per year. That is roughly $18.75 per month, or about 62 cents per day. If you add another $5,000 to the account, your daily interest earnings double to about $1.23 per day.
The longer you leave money in the account without withdrawing it, the more interest you earn, because compound interest means your balance keeps growing. After one year at 4.5% APY, $5,000 becomes $5,225. After two years, it becomes $5,461. The growth accelerates slightly each year because you are earning interest on a larger balance.
The difference between APY and interest rate
You will see two terms used: interest rate and annual percentage yield (APY). They sound similar but mean slightly different things. The interest rate is the percentage the bank pays, but APY includes the effect of compound interest — it shows you the actual return you will get over a year when interest is compounded.
For savings accounts, the difference is usually small because interest compounds frequently (often daily). But it matters when you are comparing accounts. Always compare APY, not the interest rate, because APY tells you what you will actually earn.
Where to find current interest rates and compare banks
You can see current rates on most banks' websites without opening an account. Look for the savings account product page, which will list the APY prominently. If it does not, call the bank or use their online chat to ask.
Websites like Bankrate, DepositAccounts, and DepositAccounts track rates across hundreds of banks and update them regularly. You can sort by APY to see which banks are paying the most. These sites do not sell anything — they are free to use and show you the information you need to compare.
When you compare, pay attention to whether there are conditions attached to the rate. Some banks pay a high rate only if you keep a minimum balance, or only on the first $25,000 you deposit. Read the fine print so you know what you are getting.
What happens if you withdraw money before interest is paid
Savings accounts have no penalty for withdrawals, unlike certificates of deposit (CDs). You can take money out at any time without losing interest you have already earned. If you withdraw money partway through a month, the bank calculates interest based on your average daily balance for that month, so you still earn something.
However, if you withdraw money, your balance drops, and you earn less interest going forward because you have less money in the account. This is not a penalty — it is just how interest works. The less you have deposited, the less interest you earn.
How inflation affects what your interest earnings are worth
Interest earnings are real money, but inflation can reduce what that money buys. If your savings account earns 2% APY but inflation is running at 3%, the purchasing power of your money is actually declining slightly. This is why high-yield savings accounts matter — when they pay 4% or 5% APY and inflation is lower, you are actually building wealth.
This does not mean you should avoid savings accounts. Savings accounts are still the safest place to keep money you need to access, and they are insured by the FDIC up to $250,000 per account. But it is worth understanding that the interest rate matters more when inflation is high, because the gap between what you earn and what inflation takes away determines whether you are actually getting ahead.
Frequently Asked Questions
Can I move my money to a different bank if my current bank's rate drops?
Yes. Savings accounts have no withdrawal penalties or restrictions. You can move your money to another bank at any time. Many people move their savings to higher-paying banks when rates drop, and banks expect this. Just make sure your new bank is FDIC-insured so your deposits remain protected.
How often is interest paid into my account?
Most banks pay interest monthly or quarterly. Interest is calculated daily based on your balance, but the actual deposit into your account happens on a schedule set by your bank. Check your account statements or your bank's website to see when interest is credited.
Is the interest I earn taxable?
Yes. Interest earned in a savings account is considered income and must be reported on your tax return. Your bank will send you a 1099-INT form at the end of the year if you earned $10 or more in interest. The amount is small for most people, but it still counts as taxable income.
What if my bank goes out of business?
Your deposits are protected up to $250,000 per account by FDIC insurance. If your bank fails, the FDIC pays you back in full. This is why it matters that your bank is FDIC-insured — you can check this on the FDIC website or ask your bank directly.
Do I earn interest if I do not have a minimum balance?
Most savings accounts earn interest on any balance, even $1. However, some banks pay a higher rate only if you maintain a minimum balance, such as $25,000. Read your account terms to see if there are conditions. If there are, and you cannot meet them, look for a different bank that pays the same rate with no minimum.