How much interest you earn depends on the rate your bank offers and how long your money stays in the account

The interest rate on a savings account is the percentage of your balance that the bank pays you each year. A bank offering 4.50% APY (annual percentage yield) on a $10,000 balance will pay you roughly $450 over twelve months, though the exact amount depends on how often interest compounds and whether you add or withdraw money during that time.

The rate itself varies widely. As of early 2024, online banks typically offer rates between 4.00% and 5.35% APY, while brick-and-mortar banks often offer 0.01% to 0.50%. The difference matters enormously: on $10,000, the gap between 0.01% and 4.50% is $449 per year. Rates change frequently and are set by each individual bank, not by a central authority, so you need to check your specific bank's current offer.

Interest compounds, meaning you earn interest on your interest. If your account compounds daily, the bank calculates your interest earnings each day and adds them to your balance, so the next day's interest is calculated on a slightly larger amount. Monthly and quarterly compounding are also common. More frequent compounding means slightly more money in your pocket, but the difference is usually small unless you have a large balance.

Key Takeaways

  • The interest rate is expressed as an APY (annual percentage yield), which already accounts for compounding, so you can compare rates directly between banks.
  • Online banks typically offer much higher rates than traditional banks because they have lower overhead costs.
  • The rate your bank pays you can change at any time, and banks usually lower rates when the Federal Reserve cuts its benchmark rate.
  • Interest is taxable income, so you will receive a 1099-INT form from your bank if you earn $10 or more in interest during the year.

Why rates differ so much between banks

Banks set their own rates based on what they need to attract deposits and what they can earn by lending that money out. When the Federal Reserve raises its benchmark interest rate, banks have more incentive to offer higher savings rates because they can charge borrowers more. When the Fed cuts rates, banks lower savings rates because lending becomes less profitable.

Online banks offer higher rates than traditional banks because they do not maintain physical branches, which cuts their costs significantly. They pass some of those savings to customers in the form of higher interest rates. A traditional bank with hundreds of locations may offer 0.05% APY while an online bank offers 4.75% APY on the same day, for the exact same type of account.

Some banks offer promotional rates that are higher than their standard rate for a limited time, usually to attract new customers. These rates are real, but they often drop back to a lower standard rate after three to six months, so read the fine print before opening an account.

How to calculate what you will earn

The simplest way is to multiply your balance by the APY. If you have $5,000 in an account earning 4.50% APY and you do not add or withdraw money for a full year, you will earn approximately $225 in interest. The word "approximately" matters because the exact amount depends on the compounding schedule and the exact number of days in the period, but APY is designed to give you a reliable estimate.

If you add money during the year, the calculation becomes more complex because each deposit earns interest for a different length of time. A deposit made on January 1 earns interest for the full year, while a deposit made on July 1 earns interest for only six months. Most banks calculate this automatically and show you the interest earned in your monthly or quarterly statement.

You can also use an online savings calculator by entering your starting balance, the APY, and how long you plan to keep the money. These calculators account for compounding and give you a more precise figure than simple multiplication, though the difference is usually small for balances under $100,000.

When rates change and what that means for you

Banks can change their savings rates at any time without notice. When the Federal Reserve cuts its benchmark rate, most banks lower their savings rates within days or weeks. When the Fed raises rates, banks typically raise savings rates more slowly, though they do eventually follow. This means the rate you see today may not be the rate you earn six months from now.

If you lock your money into a CD (certificate of deposit) instead of a regular savings account, your rate is may provide for the full term, whether that is three months, one year, or five years. A savings account rate can change daily, but a CD rate cannot. This is the main trade-off: CDs pay a fixed rate but require you to leave your money untouched until the maturity date, while savings accounts let you withdraw anytime but offer a rate that can drop.

How interest is taxed

Interest earned in a savings account is taxable income. Your bank will send you a 1099-INT form if you earn $10 or more in interest during the calendar year. You report this interest on your federal tax return as ordinary income, which means it is taxed at your regular income tax rate, not at a lower capital gains rate.

This matters for your actual return. If you earn $500 in interest and you are in the 24% tax bracket, you will owe $120 in federal income tax on that interest, leaving you with $380 in after-tax earnings. Some states also tax savings interest, so your total tax bill may be higher. When comparing savings accounts, consider the after-tax return, not just the stated APY.

Comparing rates across different account types

A regular savings account, a money market account, and a high-yield savings account all work similarly: you deposit money, the bank pays you interest, and you can withdraw anytime. The difference is usually the interest rate. High-yield savings accounts typically offer the highest rates because they are offered by online banks. Money market accounts sometimes offer slightly lower rates but may come with a debit card or checkbook. Regular savings accounts at traditional banks usually offer the lowest rates.

CDs offer higher rates than savings accounts because you agree to lock your money away for a set period. A one-year CD might pay 4.75% while a savings account at the same bank pays 4.50%. A five-year CD might pay 4.90%. The longer the term, the higher the rate, though this is not always true—sometimes short-term rates are higher than long-term rates when the economy is uncertain.

Treasury bills and bonds are issued by the U.S. government and are not bank products, but they are another place to park cash. A six-month Treasury bill might pay 5.25% while a high-yield savings account pays 4.75%. The trade-off is that Treasury bills are less liquid—you cannot withdraw your money early without selling on the secondary market—and they are taxed differently at the federal level (though not at the state level).

What happens if your bank fails

Deposits in a savings account are insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per depositor, per bank. This means if your bank fails, the FDIC will pay you back up to $250,000, even if the bank has no money left. This insurance is automatic—you do not need to do anything to activate it.

If you have more than $250,000, you can protect the excess by splitting it across multiple banks. Each bank's FDIC insurance is separate, so $250,000 at Bank A and $250,000 at Bank B are both fully insured. Some banks offer multiple FDIC-insured accounts under different ownership categories (for example, an account in your name and a separate account in your spouse's name), which can increase your coverage, but the rules are complex. The FDIC website has a calculator that shows you exactly how much of your money is insured at any given bank.

Frequently Asked Questions

Is the interest rate the same as APY?

Not exactly. The interest rate is the percentage the bank pays, while APY includes the effect of compounding. A bank might advertise an interest rate of 4.48% with daily compounding, which equals 4.50% APY. When comparing accounts, always use the APY because it is the true annual return you will receive.

Can I lose money in a savings account?

No, you cannot lose the principal you deposit. The bank cannot take money out of your account. However, if inflation is higher than your interest rate, the purchasing power of your money decreases. If you earn 4.50% interest but inflation is 5.00%, you are effectively losing 0.50% in real value each year, though the dollar amount in your account still goes up.

Do I have to pay taxes on interest if I earn very little?

You must report all interest income on your tax return, even if it is less than $10. However, if your total income is below the standard deduction for your filing status, you may not owe any federal income tax. You still need to file a return to claim a refund of any taxes withheld. State tax rules vary, so check your state's requirements.

What is the highest savings rate I can find right now?

Rates change constantly and vary by bank. As of early 2024, some online banks offered rates above 5.00% APY, but this will change as the Federal Reserve adjusts its benchmark rate. Check current rates on comparison websites or directly on bank websites to see what is available today.

Should I move my money to a higher-rate bank?

If your current bank pays 0.01% and another bank pays 4.50%, moving your money could earn you hundreds of dollars per year with no risk. The process usually takes three to five business days. The main reason not to move is if you use other services at your current bank and value the convenience, but the interest difference is usually large enough to outweigh that.