Banks pay you interest on the money you deposit

A high-yield savings account makes money the same way any savings account does: the bank pays you interest on your balance. When you deposit $1,000, the bank uses that money to lend to other customers or invest it. In return, they pay you a percentage of what you deposited each month or year. That percentage is called the interest rate or APY (annual percentage yield).

The difference between a high-yield account and a regular savings account is the rate. A typical bank savings account might pay 0.01% APY. A high-yield savings account typically pays between 4% and 5% APY right now, though that rate changes based on what the Federal Reserve does with interest rates. The higher the rate, the more money you earn on the same deposit.

You do not have to do anything to earn this interest. It accumulates automatically. If you deposit $10,000 in an account paying 4.5% APY, you earn roughly $450 per year, paid out monthly in small chunks.

Key Takeaways

  • Banks pay interest on your deposit because they lend or invest your money and keep most of the profit, paying you a small percentage back.
  • High-yield accounts currently pay 4% to 5% APY, compared to 0.01% or less at traditional banks, because they have lower overhead costs.
  • The interest rate you see today will change when the Federal Reserve raises or lowers its benchmark rate, usually within weeks or months.
  • Interest compounds monthly or daily depending on the account, meaning you earn interest on the interest you already earned.

Why high-yield accounts pay more than regular bank accounts

Banks that offer high-yield savings accounts are usually online-only operations. They do not maintain physical branches, do not employ as many staff, and do not spend money on building leases or tellers. Because their costs are lower, they can afford to pay depositors a larger share of the profit they make from lending out your money.

A traditional bank with hundreds of branches has to cover all those expenses before it can pay you anything. An online bank with no branches can pass most of the lending profit directly to you as interest.

The tradeoff is convenience: you cannot walk into a branch, and you may have to wait a day or two for transfers to clear. But if you are saving money rather than spending it regularly, that inconvenience costs you nothing, and the higher interest rate saves you money.

How the Federal Reserve controls the interest rate you receive

You do not control the rate your high-yield account pays. The Federal Reserve, a government agency that oversees the banking system, sets a benchmark interest rate. Banks use that benchmark to decide what rate to offer depositors.

When the Federal Reserve raises its benchmark rate, banks raise the rates they pay on savings accounts within days or weeks. When the Federal Reserve lowers its benchmark rate, banks lower deposit rates just as quickly. This happened dramatically in 2023 and 2024: high-yield accounts paid 5% or more when the Federal Reserve's rate was high, and that rate has dropped as the Fed has cut rates.

You will see the rate you earn change over time. Lock in the current rate by opening an account now if rates are high, but understand that the rate will move with the Federal Reserve's decisions, not stay fixed.

Compounding: earning interest on your interest

Most high-yield savings accounts compound interest daily or monthly. That means the bank calculates interest on your original deposit plus any interest you have already earned.

If you deposit $10,000 at 4.5% APY compounded daily, the bank divides the annual rate by 365 and calculates interest each day. At the end of the first day, you earn about $1.23. The next day, the bank calculates interest on $10,001.23, not just $10,000. Over a year, that compounding adds up. You earn roughly $460 instead of exactly $450 because you earned interest on the interest.

The difference is small with savings accounts, but it works in your favor. The more frequently interest compounds, the more you earn. Daily compounding is better than monthly compounding.

What happens to your money after you deposit it

When you deposit money into a high-yield savings account, the bank does not lock it away. They lend it to other customers as mortgages, car loans, and business loans. They also buy government bonds and other investments. The interest those borrowers and investments pay to the bank is where your interest comes from.

If a mortgage borrower pays 6% interest to the bank, and the bank pays you 4.5% interest, the bank keeps 1.5% as profit. That spread is how banks make money. Your deposit is the raw material they use to generate that profit, and you receive a cut of it.

Your money is insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per account holder per bank. That means even if the bank fails, you get your money back. This insurance is why you can trust that your deposit is safe even though the bank is lending it out.

How to calculate what you will earn

To estimate your earnings, multiply your deposit by the APY and divide by 12 for a monthly estimate. A $50,000 deposit at 4.5% APY earns roughly $187.50 per month ($50,000 × 0.045 ÷ 12).

That calculation assumes the rate stays the same all year, which it will not. If the Federal Reserve cuts rates mid-year, your rate will drop and your monthly earnings will fall. If rates rise, your earnings rise. Most online banks update rates within days of a Federal Reserve decision.

You can also use a savings calculator on the bank's website. Enter your deposit amount, the current APY, and how long you plan to keep the money. The calculator shows you the total interest you will earn, accounting for daily or monthly compounding.

Taxes on interest earnings

Interest you earn on a high-yield savings account is taxable income. At the end of each year, the bank sends you a 1099-INT form showing how much interest you earned. You report that amount on your federal tax return.

If you earned $500 in interest and you are in the 24% tax bracket, you will owe roughly $120 in federal taxes on that interest. State taxes may apply too, depending on where you live. This is one reason high-yield accounts are better for long-term savings than for money you need to spend soon: the interest has to cover the tax bill before you come out ahead.

If you earned less than $10 in interest for the year, the bank may not send you a 1099-INT form, but you still owe taxes on it if you are required to file a return.

Frequently Asked Questions

Can the bank take back the interest I already earned?

No. Once interest is deposited into your account, it belongs to you. The bank can lower the rate it pays on future interest, but it cannot reduce interest you have already received. If you earned $100 in interest last month and the rate drops this month, you keep the $100.

What if I withdraw money before the end of the year?

You still earn interest on the money while it sits in the account. If you deposit $10,000 on January 1 and withdraw it on June 30, you earn interest for six months. The bank calculates interest daily, so you earn a proportional amount based on how long your money was there.

Is a high-yield savings account the same as a money market account?

They are similar but not identical. Both pay interest based on the Federal Reserve's rate. Money market accounts sometimes offer check-writing or debit card access, while high-yield savings accounts typically do not. Money market accounts may have higher minimum deposits. For most savers, a high-yield savings account is simpler and pays the same rate.

Why would I keep money in a regular bank account if high-yield accounts pay more?

Convenience and access. If you need to deposit cash frequently or withdraw money in person, a traditional bank with branches is easier. If you are saving money you do not plan to touch for months, a high-yield account online costs you nothing in inconvenience and earns you significantly more interest.

Does the FDIC insurance cover all my money?

FDIC insurance covers up to $250,000 per depositor per bank. If you have $500,000, only $250,000 is insured at one bank. You can open accounts at multiple banks to cover larger amounts, and each account gets its own $250,000 of coverage. Interest you have earned counts toward that $250,000 limit.