Interest is how banks pay you to keep money with them

A savings account earns money through interest—a percentage of your balance that the bank adds to your account on a set schedule. The bank pays you this interest because it lends out the money you deposit to other customers. You are essentially allowing the bank to use your money, and interest is your share of what they make from that use.

The amount you earn depends on three things: how much money sits in your account, what interest rate the bank offers, and how often the bank compounds the interest (adds earned interest back into your balance so it earns interest too). A $1,000 balance at 4.5% annual interest earns roughly $45 per year if compounded daily, though the exact amount varies slightly by how your bank calculates it.

Interest rates change constantly. Banks set their own rates based on what the Federal Reserve does with its benchmark rate, which it adjusts several times per year. When the Fed raises rates, banks typically raise savings rates within weeks. When the Fed cuts rates, savings rates fall more slowly—sometimes taking months.

Key Takeaways

  • Interest is paid as a percentage of your account balance, usually expressed as an annual rate but added monthly or daily depending on the bank.
  • The higher the interest rate and the larger your balance, the more money you earn, and daily compounding means you earn interest on your interest.
  • Banks set rates independently, so the same $10,000 earns different amounts at different banks—comparing rates before opening an account matters.
  • Interest rates move with Federal Reserve decisions, so the rate you see today may be lower or higher in three months.
  • You pay income tax on interest you earn, so a 4% rate nets less than 4% after taxes depending on your tax bracket.

Annual Percentage Yield (APY) is the rate that actually matters

Banks advertise two different numbers: Annual Percentage Rate (APR) and Annual Percentage Yield (APY). APR is the straightforward interest rate without compounding. APY includes the effect of compounding—the way interest gets added back to your balance and then earns interest itself.

APY is the number to use when comparing accounts. A bank advertising 4.5% APY on a savings account will actually return 4.5% per year when compounding is included. A bank advertising 4.5% APR with monthly compounding returns slightly less than 4.5% APY. The difference grows larger with higher rates and more frequent compounding, but for savings accounts it is usually less than 0.1 percentage points.

You can find APY listed on the bank's website, on account disclosure documents, and on comparison sites like Bankrate or DepositAccounts. The law requires banks to show APY prominently so you can compare fairly across institutions.

Higher interest rates are usually found at online banks and credit unions

Traditional brick-and-mortar banks often offer rates between 0.01% and 0.5% APY on standard savings accounts. Online banks and credit unions frequently offer rates between 4% and 5.5% APY on the same type of account. The difference exists because online banks have lower overhead costs—no physical branches, fewer employees—so they can pass higher rates to customers.

Credit unions are member-owned institutions that sometimes prioritize member returns over profit, which can mean higher savings rates. However, credit unions vary widely. Some offer competitive rates; others do not. You must be a member to open an account, which usually means living or working in a specific area or belonging to a may have access to organization.

The tradeoff for higher rates at online banks is convenience. You cannot walk into a branch to deposit cash or speak to someone in person. Most online banks accept mobile check deposit and transfers from other banks, but cash deposits require a trip to a partner bank or ATM network.

Money market accounts and high-yield savings accounts earn more than regular savings

High-yield savings accounts are standard savings accounts offered by online banks at rates significantly higher than traditional banks. They work identically to any other savings account—you deposit money, it earns interest, you can withdraw it—but the interest rate is much higher. There is no catch. The higher rate reflects the bank's lower costs, not a different product.

Money market accounts are a hybrid between savings accounts and checking accounts. They typically offer higher interest rates than savings accounts, but they also come with a debit card and check-writing privileges. The tradeoff is that many money market accounts have higher minimum balance requirements—sometimes $2,500 or more—and may charge fees if your balance drops below that minimum.

Both products are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per account holder per bank, so your money is protected the same way it is in a regular savings account. The choice between them depends on whether you need check-writing and debit card access, and whether you can meet any minimum balance requirement.

Certificates of Deposit lock your money away for a higher rate

A Certificate of Deposit (CD) is an agreement to leave money in an account for a fixed period—typically three months to five years—in exchange for a may provide interest rate. CD rates are almost always higher than savings account rates at the same bank. A bank might offer 0.5% on savings but 5.2% on a one-year CD.

The catch is that you cannot withdraw the money before the CD matures without paying a penalty. The penalty is usually a certain number of months of interest. If you withdraw early from a one-year CD paying 5.2%, you might lose three months of interest, meaning you actually earn 3.9% instead. Some banks offer no-penalty CDs with slightly lower rates but allow early withdrawal without penalty.

CDs make sense if you know you will not need the money for a specific period and want to lock in a rate before rates fall. They do not make sense if you might need the money sooner, because the penalty often wipes out most or all of the interest gain.

Interest is taxed as ordinary income

The interest you earn on a savings account, money market account, or CD is taxed as ordinary income at your federal tax rate and your state tax rate (if your state has income tax). If you earn $500 in interest and your federal tax bracket is 22%, you owe $110 in federal income tax on that interest. Your state may owe additional tax.

Banks report interest earnings to the IRS on a Form 1099-INT if you earn more than $10 in interest during the year. You receive a copy and must report it on your tax return. Even if you do not receive a 1099-INT, you still owe tax on any interest you earned.

This means a 4.5% interest rate nets less than 4.5% after taxes. If your federal tax bracket is 24% and your state tax rate is 5%, a 4.5% rate nets roughly 3.2% after taxes. High-yield savings accounts still beat traditional banks even after taxes, but the gap is smaller than the advertised rates suggest.

Comparing accounts means looking at rate, compounding frequency, and fees

To find the account that earns you the most money, gather three pieces of information: the APY, how often interest compounds, and what fees the bank charges. A bank offering 5% APY with daily compounding and no fees beats a bank offering 5.1% APY with monthly compounding and a $5 monthly maintenance fee.

Use a savings calculator to see the actual dollar difference. Bankrate, DepositAccounts, and most online banks have calculators where you enter your balance, the APY, and the compounding frequency, and it shows you how much you will earn over one year. Run the same numbers across three to five banks before deciding.

Check the bank's fee schedule for maintenance fees, overdraft fees (if the account has overdraft protection), and early withdrawal penalties (for CDs). A $10 monthly fee on a $5,000 balance earning 4.5% APY wipes out most of the interest. Free accounts with slightly lower rates often earn you more money in the end.

Frequently Asked Questions

How often does interest get added to my account?

Most banks compound interest daily but credit it monthly. This means interest accrues every day, but you see it appear in your account once a month. Some banks credit quarterly or annually. Daily compounding is better because you earn interest on interest more frequently, but the difference is usually small—less than 0.1% per year.

Can I lose money in a savings account?

No. Your principal—the money you deposit—is protected by FDIC insurance up to $250,000 per bank. Interest rates can fall, so you earn less than you expected, but you cannot lose the money itself. The only exception is if you withdraw before a CD matures and the penalty exceeds your interest earnings, in which case you net less than you started with.

What happens if I withdraw money before a CD matures?

You pay an early withdrawal penalty, usually expressed as a number of months of interest. If your CD pays $100 in interest and the penalty is three months of interest, you lose $25 and net $75 in interest. Some banks offer no-penalty CDs where you can withdraw without penalty, but the rate is lower to compensate.

Do I need a minimum balance to earn interest?

Most high-yield savings accounts have no minimum balance requirement. Money market accounts often require $2,500 or more. CDs typically require a minimum deposit, often $500 to $1,000. Check the bank's account terms before opening. Some banks waive minimums for accounts opened online or for customers who set up direct deposit.

Is the interest rate may provide to stay the same?

No. Savings account and money market rates change whenever the bank decides to change them, usually in response to Federal Reserve rate changes. CD rates are locked in for the term of the CD—if you open a one-year CD at 5%, you earn 5% for the full year regardless of what happens to market rates. When the CD matures, the new rate may be higher or lower.