Interest is how banks pay you to keep money with them

When you deposit money into a savings account, the bank lends that money to other customers and businesses. In return, the bank pays you interest — a percentage of your balance that gets added to your account on a set schedule, usually monthly or daily. The interest rate varies by bank and account type, and it changes based on what the Federal Reserve does with its benchmark rate.

The amount you earn depends on three things: how much money you have in the account, what interest rate the bank offers, and how long the money sits there. A $5,000 balance at 4.5% annual interest earns roughly $225 per year if the rate stays steady. A $500 balance at the same rate earns $22.50. The math is straightforward, but the rates themselves shift constantly.

You do not have to do anything to earn this interest. Once you open the account and deposit money, the bank calculates and deposits the interest automatically. You can watch your balance grow without touching the account.

Key Takeaways

  • Banks pay you interest on savings account balances, with rates that vary by institution and change based on Federal Reserve policy.
  • High-yield savings accounts currently offer rates between 4% and 5.35% annually, while traditional bank savings accounts often pay less than 1%.
  • Money market accounts and certificates of deposit (CDs) offer higher rates than savings accounts but come with restrictions on how often you can withdraw.
  • The interest you earn counts as taxable income on your federal tax return, reported on Form 1099-INT if you earn $10 or more in a year.
  • Shopping for rates matters: moving $10,000 from a 0.01% account to a 4.5% account means earning $450 more per year on the same money.

High-yield savings accounts pay significantly more than traditional savings

A high-yield savings account is a savings account offered by banks or credit unions that pays a much higher interest rate than a standard savings account. As of late 2024, high-yield accounts pay between 4% and 5.35% annually, while traditional savings accounts at large banks often pay 0.01% to 0.05%. On a $10,000 balance, that difference means earning $400 to $500 per year instead of $1 to $5.

Most high-yield savings accounts are offered by online banks or credit unions, not by the large brick-and-mortar banks you see on every corner. Online banks have lower overhead costs, so they pass higher rates to customers. The tradeoff is that you manage the account through a website or app rather than visiting a branch in person.

High-yield accounts are still savings accounts, which means the money is insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per account holder per bank. You can withdraw money whenever you need it without penalty, though some banks limit the number of withdrawals per month. The interest rate is not locked in — it can go up or down as the Federal Reserve changes its rates.

Certificates of deposit lock in a rate for a set time period

A certificate of deposit (CD) is an account where you agree to leave money untouched for a specific period — typically three months, six months, one year, three years, or five years. In exchange, the bank pays you a higher interest rate than a savings account. A one-year CD might pay 4.8% while a high-yield savings account pays 4.5%, and a five-year CD might pay 5.2%.

The catch is that if you withdraw money before the CD matures (reaches its end date), you pay an early withdrawal penalty. The penalty varies by bank and CD term — it might be three months of interest, six months of interest, or a flat fee. You need to know the penalty before you buy the CD, because it can wipe out most or all of your earnings if you need the money early.

CDs make sense if you know you will not need the money for a set period and want to lock in a rate before rates drop. They do not make sense if you might need the money within the CD term, because the penalty usually costs more than the extra interest you earned.

Money market accounts combine features of savings and checking

A money market account is a hybrid between a savings account and a checking account. It typically pays interest rates close to high-yield savings accounts (currently 4% to 5%), but it also comes with a debit card and check-writing privileges. The tradeoff is that most money market accounts limit you to three to six withdrawals per month before charging a fee for extra withdrawals.

Money market accounts are useful if you want to earn interest on a balance you might need to access more often than a CD allows, but less often than a regular savings account. They are FDIC-insured up to $250,000, just like savings accounts and CDs.

The interest rate on a money market account is variable, meaning it can change whenever the bank decides to change it. Some banks tie their rates to the Federal Reserve's benchmark rate, so when the Fed raises rates, your money market rate rises too. When the Fed cuts rates, your rate falls.

Interest compounds when the bank adds earnings to your balance

Compound interest means the bank calculates interest on your original balance plus any interest you have already earned. If you have $10,000 earning 4.5% annually and the bank compounds monthly, you earn about $37.50 in the first month. In the second month, you earn interest on $10,037.50, not just the original $10,000. Over time, this compounds into noticeably more money.

The difference between monthly and daily compounding is small on most balances, but it adds up. A $50,000 balance earning 4.5% annually grows to $52,296 after one year with daily compounding, versus $52,293 with monthly compounding — a $3 difference. On larger balances or longer time periods, the difference grows.

You do not need to do anything to benefit from compounding. It happens automatically. The only thing you control is choosing an account that compounds frequently (daily is better than monthly) and keeping the money in the account long enough for compounding to work.

The interest you earn is taxable income

Any interest you earn on a savings account, money market account, or CD counts as taxable income on your federal tax return. If you earn $10 or more in interest during the year, the bank sends you a Form 1099-INT by January 31 of the following year. You report this income on your tax return, and you owe federal income tax on it at your regular tax rate.

Some states also tax interest income, though the rules vary. A few states do not tax interest at all. You can check your state's tax website or speak with a tax preparer to find out whether your state taxes savings interest.

The tax you owe reduces the real return on your money. If you earn $500 in interest and you are in the 22% federal tax bracket, you owe $110 in federal tax, leaving you with $390 in actual earnings. This is why the after-tax return matters more than the advertised rate, especially on large balances.

Shopping for rates and comparing accounts makes a real difference

Interest rates change constantly, and different banks offer different rates for the same type of account. Comparing rates before you open an account can mean earning hundreds of dollars more per year on the same balance. A $25,000 balance earning 0.5% at a traditional bank earns $125 per year. The same $25,000 at a high-yield account earning 4.75% earns $1,187.50 — a difference of $1,062.50 per year.

You can compare rates on websites like Bankrate, DepositAccounts, or the Federal Reserve's own rate comparison tool. These sites list current rates from hundreds of banks and credit unions, updated daily. You can filter by account type, minimum balance, and whether you want FDIC insurance.

When you compare, look at the actual annual percentage yield (APY), not just the interest rate. APY includes the effect of compounding, so it shows you the real return. Also check the minimum balance required to open the account and whether the bank charges monthly fees. A high rate with a $25,000 minimum balance or a $10 monthly fee might not be better than a slightly lower rate with no minimums or fees.

Frequently Asked Questions

How much money do I need to open a high-yield savings account?

Most online banks that offer high-yield savings accounts have no minimum balance requirement to open the account. Some require $0.01 to start. A few require $500 or $1,000. Check the specific bank's requirements before you apply, because minimums vary widely and change over time.

Can I lose money in a savings account?

No. Savings accounts, money market accounts, and CDs are all FDIC-insured up to $250,000 per account holder per bank. The bank guarantees your principal balance. Interest rates can fall, so you might earn less than you expected, but you cannot lose your original deposit.

What happens to my interest if I withdraw money before a CD matures?

You lose some or all of your interest to an early withdrawal penalty. The penalty is set when you buy the CD and is usually three to six months of interest, or a flat fee. Read the CD terms carefully before you buy, because the penalty can be larger than the interest you earned.

Do I have to report savings account interest on my taxes if I earn less than $10?

No. The bank only sends you a Form 1099-INT if you earn $10 or more in interest during the year. If you earn less than $10, you do not receive a form and do not have to report it. However, you are still technically required to report all income, even amounts under $10.

Will my high-yield savings rate stay the same forever?

No. High-yield savings rates are variable, meaning the bank can change them at any time. Most banks tie their rates to the Federal Reserve's benchmark rate, so when the Fed raises or cuts rates, your savings rate usually follows within days or weeks. Lock-in rates are only available with CDs.