Interest is how a bank pays you to keep money in a savings account
A savings account earns money through interest—a percentage of your balance that the bank adds to your account on a regular schedule, usually monthly or daily. The bank pays you interest because it uses your deposited money to lend to other customers or invest it. The more money you keep in the account and the higher the interest rate, the more you earn.
The amount you earn depends on three things: your account balance, the interest rate the bank offers, and how often interest is calculated and added to your account. A $1,000 balance at 4.5% annual interest earns differently than the same balance at 0.01% interest—and the difference compounds over time, meaning you earn interest on the interest you've already earned.
Not all savings accounts earn the same rate. Banks set their own rates based on what the Federal Reserve does with interest rates, how much competition exists in your area, and what type of account you hold. Online banks often pay higher rates than brick-and-mortar banks because they have lower overhead costs.
Key Takeaways
- Interest rates on savings accounts vary widely between banks, from under 0.01% to over 5%, so comparing rates before opening an account matters.
- The interest you earn is calculated on your balance and added to your account on a schedule set by the bank, usually monthly or daily.
- Compound interest means you earn interest on the interest already added to your account, which accelerates growth over time.
- High-yield savings accounts at online banks typically pay 4% to 5.5% annual interest, while traditional bank savings accounts often pay under 0.5%.
- The Federal Reserve's interest rate decisions affect what banks offer, so rates change over time and are not locked in permanently.
How interest rates are quoted and what they actually mean
Banks advertise an Annual Percentage Yield (APY), which tells you the total interest you would earn in one year if you left your money untouched. A 4.5% APY on $10,000 means you would earn $450 in one year (before taxes). The APY already includes the effect of compound interest, so it is the most honest way to compare accounts.
Some banks also mention Annual Percentage Rate (APR), which is different and usually lower than APY. APR does not account for compounding, so it understates what you actually earn. When comparing savings accounts, always look at the APY, not the APR.
Interest rates change. When the Federal Reserve raises or lowers its benchmark rate, banks adjust what they pay on savings accounts within days or weeks. If you lock money into a certificate of deposit (CD), the rate stays the same for the full term. In a regular savings account, the rate can drop without warning, so a 5% rate today might be 3% in six months if the Fed cuts rates.
Where to find the highest interest rates
Online banks and online divisions of traditional banks pay the highest rates because they do not maintain physical branches. As of the time this guide was written, online savings accounts paid between 4% and 5.5% APY, while traditional bank savings accounts paid between 0.01% and 0.5%. The gap is real and worth shopping for.
Credit unions sometimes offer competitive rates, especially if you are a member. Some credit unions pay 3% to 4% on savings accounts, though often with balance limits or membership requirements. Check your local credit union's website or call to ask what they currently offer.
Money market accounts are a hybrid between checking and savings accounts. They often pay rates similar to high-yield savings accounts but may require a higher opening balance and limit how many withdrawals you can make per month. If you need to access your money frequently, a regular savings account is simpler.
How compound interest grows your money faster
Compound interest means the bank adds interest to your account, and then you earn interest on that interest in the next period. If you start with $5,000 at 5% APY compounded monthly, after one month you earn about $21 in interest. In month two, you earn interest on $5,021, not just the original $5,000. Over a year, that compounding adds up to real money.
The longer your money sits in the account, the more compound interest works in your favor. A $10,000 deposit at 5% APY grows to $10,512.68 after one year. After five years at the same rate, it grows to $12,762.82. The difference between year one and year five is compound interest doing the work.
Compound interest works the same way whether interest is added daily, monthly, or quarterly, but daily compounding grows your balance slightly faster because interest is calculated more often. Most high-yield savings accounts compound daily, which is why they are worth choosing over accounts that compound monthly.
What happens to your interest earnings at tax time
Interest you earn on a savings account is taxable income. If you earned $100 or more in interest during the year, the bank sends you a Form 1099-INT in January, and you must report that interest on your federal tax return. The interest is taxed as ordinary income at your regular tax rate, not at a lower capital gains rate.
If you earned less than $100, the bank may not send a form, but you still owe tax on the interest if you file a return. Keep your own records of interest earned if the bank does not send a 1099-INT.
The tax on interest reduces what you actually keep. If you earn $500 in interest and you are in the 24% tax bracket, you owe $120 in federal tax on that interest, leaving you with $380. This is one reason why even small differences in interest rates matter—a 1% difference on a large balance can mean hundreds of dollars more after taxes.
Comparing savings accounts to other ways to earn money on cash
Savings accounts are not the only place to park money and earn interest. Certificates of Deposit (CDs) lock your money away for a set term—three months, one year, five years—and pay a higher rate than savings accounts in exchange for that commitment. If you withdraw early, you pay a penalty. CDs make sense if you know you will not need the money for a specific period.
Money market accounts pay rates close to high-yield savings accounts but require higher minimum balances and limit withdrawals. Treasury bills and bonds issued by the U.S. government pay rates comparable to savings accounts and CDs but involve buying and selling in the bond market. For most people keeping emergency funds or short-term savings, a high-yield savings account is simpler and pays nearly as much.
Stock market investments and mutual funds can earn more over long periods, but they carry risk—your balance can go down as well as up. Savings accounts are insured by the FDIC up to $250,000, so your money is safe. The tradeoff is that savings accounts earn less than stocks historically do over decades.
How to move to a higher-paying account if rates drop
If your current bank's interest rate drops and you find a better rate elsewhere, you can move your money. Open a new account at the bank offering the higher rate, then transfer your balance from the old account. The transfer usually takes one to three business days. You do not have to close the old account immediately—some people keep it open for a small emergency fund.
When you move money, the interest you earned at the old bank up to the day of transfer is yours to keep. The new bank starts paying interest on the new balance according to its schedule. There is no penalty for moving savings between banks, though some banks charge a small fee to close an account if you do not maintain a minimum balance.
Shop for rates every six months to a year. Interest rates change, and a bank that paid 5% six months ago might now pay 3%. Spending 20 minutes comparing rates and moving your money can earn you hundreds of dollars per year on a large balance.
Frequently Asked Questions
Do I have to pay taxes on interest I earn in a savings account?
Yes. Interest is taxable income. If you earn $100 or more in a calendar year, the bank sends you a Form 1099-INT and you report it on your tax return. Interest is taxed at your ordinary income tax rate, not at a lower rate.
What is the difference between APY and APR on a savings account?
APY (Annual Percentage Yield) includes the effect of compound interest and shows what you actually earn. APR (Annual Percentage Rate) does not include compounding and is lower. Always compare accounts using APY, not APR.
Can I lose money in a savings account?
No, not through normal account activity. Your balance is insured by the FDIC up to $250,000, so even if the bank fails, your money is protected. Your balance only shrinks if you withdraw money or if fees exceed the interest you earn.
How often is interest added to my savings account?
Most banks add interest monthly or daily. Daily compounding grows your balance slightly faster. Check your account agreement or the bank's website to see how often interest is calculated and posted to your account.
Should I move my money to a different bank if I find a higher interest rate?
If the rate difference is significant and you have a large balance, yes. Moving $50,000 from a 0.5% account to a 5% account means earning $2,250 more per year. The move takes a few minutes and a few business days for the transfer to complete.