What your savings account interest depends on

The amount of interest a savings account earns depends almost entirely on the annual percentage yield (APY) your bank offers and how much money you keep in the account. A bank with a 4.50% APY will pay you roughly $45 per year on every $1,000 you hold; a bank offering 0.01% APY will pay you about 10 cents on that same $1,000. The difference between banks can be hundreds of dollars per year on the same balance.

APY varies by bank, by account type, and by how often rates change. Online banks typically offer higher rates than brick-and-mortar banks because they have lower overhead costs. Money market accounts sometimes pay more than regular savings accounts. Rates also move up and down based on what the Federal Reserve does with its benchmark interest rate — when the Fed raises rates, banks usually raise savings APYs within weeks or months; when the Fed cuts rates, banks cut savings rates too, often faster than they raised them.

The actual dollars you earn also depend on how long your money sits in the account and whether you add to it or withdraw from it. Interest compounds — meaning you earn interest on your interest — but the frequency of compounding (daily, monthly, quarterly) matters less than the APY itself.

Key Takeaways

  • A savings account earning 4.50% APY will pay you roughly $45 per year on every $1,000 you hold, while one earning 0.01% APY pays about 10 cents on the same amount.
  • Online banks usually offer higher APYs than traditional banks because they spend less on physical branches and staff.
  • Your actual interest earnings depend on your balance, how long you keep the money in the account, and how often you add or withdraw funds.
  • APY rates change when the Federal Reserve adjusts its benchmark rate, and banks typically pass those changes to customers within weeks or months.
  • Daily compounding versus monthly compounding makes a small difference, but the APY rate itself is what drives your earnings.

How to calculate interest on your specific balance

The basic formula is simple: multiply your balance by the APY, then divide by 365 (the number of days in a year). If you have $5,000 in an account earning 4.50% APY, you would earn roughly $225 per year, or about 62 cents per day.

Most banks compound interest daily, meaning they calculate what you owe and add it to your account every single day. This means the interest you earn on day two includes a tiny bit of interest on the interest from day one. Over a year, daily compounding adds slightly more than if interest were calculated once at year-end, but the difference is usually just a few dollars on typical balances.

If you add money to the account during the year, your earnings will be higher because you are earning interest on a larger average balance. If you withdraw money, your earnings will be lower. Banks calculate this by tracking your balance each day and averaging it over the statement period.

Why APY rates differ so much between banks

Online banks pay more because they do not maintain physical locations, employ as many staff members, or spend money on branch operations. That lower cost structure means they can pass higher rates to customers. A bank like Ally or Marcus can offer 4.50% APY while a traditional bank down the street offers 0.05% on the same type of account.

Credit unions sometimes offer competitive rates too, especially if you are a member. Some credit unions pay higher APYs on savings accounts than online banks, though rates vary widely depending on the union's size and funding model.

Banks also use savings rates as a tool to attract deposits. When a bank needs more customer money, it raises its APY. When deposits are plentiful, it may lower rates. This is why you will see rates shift even when the Federal Reserve has not changed its benchmark rate recently.

How Federal Reserve rate changes affect what you earn

The Federal Reserve sets a target range for the federal funds rate — the interest rate banks charge each other for overnight loans. When the Fed raises this rate, banks have more incentive to pay higher APYs on savings accounts to attract deposits. When the Fed cuts rates, banks cut savings APYs, often quickly.

The lag between a Fed rate change and a bank rate change is usually short. After the Fed raises rates, most online banks increase their APYs within one to three weeks. After the Fed cuts rates, banks often cut savings APYs within days. This asymmetry means your earnings can drop faster than they rise.

If you are shopping for a savings account, check whether the bank has a history of raising rates when the Fed raises them. Some banks are slower to pass increases to customers than others.

Comparing savings accounts by APY

When you are looking at savings accounts, the APY is the only number that matters for interest earnings. Ignore marketing language about "high-yield" or "premium" accounts — just compare the actual APY percentage. A 4.50% APY is a 4.50% APY regardless of what the bank calls the account.

Check whether the APY is may provide or promotional. Some banks offer a higher rate for the first three or six months, then drop it to a lower rate. Read the fine print to see when the promotional period ends and what the standard rate will be. If you plan to keep money in the account for years, a promotional rate that expires is less valuable than a competitive standard rate.

Also check the minimum balance requirement. Some banks require you to keep $25,000 or more in the account to earn the advertised APY. If you have less, you may earn a much lower rate. Online banks usually have no minimum or a very low one ($0 to $500).

What happens to your interest if you withdraw money early

Savings accounts have no penalty for withdrawals. You can take money out at any time and keep all the interest you have already earned. This is different from certificates of deposit (CDs), which charge a penalty if you withdraw before the maturity date.

If you withdraw money partway through a month, you will earn interest only on the balance you held for that period. For example, if you keep $10,000 in the account for 15 days, then withdraw $5,000, you earn interest on $10,000 for those 15 days and then on $5,000 for the remaining days of the month. Banks calculate this daily, so the math is precise.

Why your savings account interest may feel small

Even at 4.50% APY, a savings account earning $225 per year on $5,000 does not feel like much. This is partly because interest rates have been historically low for much of the past 15 years. From 2009 to 2021, savings APYs were often below 0.10%, meaning you earned almost nothing. Rates rose sharply starting in 2022 and 2023, but they are still lower than they were in the 1980s and 1990s, when savings accounts regularly paid 5% to 8%.

Savings accounts are also not meant to be an investment. They are meant to be safe, liquid places to hold money you might need soon. If you are looking for higher returns, you would need to take on investment risk by buying stocks, bonds, or other securities — and those come with the possibility of losing money, which savings accounts do not.

The real value of a savings account is that your money is safe, you can access it whenever you need it, and you earn something rather than nothing. Even 4.50% APY beats keeping cash under a mattress or in a checking account that pays 0%.

Frequently Asked Questions

Do I have to pay taxes on savings account interest?

Yes. Interest earned in a savings account is taxable income. Banks send you a 1099-INT form at the end of the year if you earned $10 or more in interest. You report this on your tax return. The tax rate depends on your overall income and tax bracket.

Is my interest may provide, or can the bank change the rate?

Banks can change the APY at any time unless you have locked in a rate with a CD. Savings account rates are variable, meaning they move up and down. The bank must notify you before lowering the rate, but there is no penalty for closing the account if you disagree with the new rate.

What is the difference between APY and APR for savings accounts?

APY includes the effect of compounding (earning interest on interest), while APR does not. For savings accounts, always use the APY to compare rates, because that is what you will actually earn. APR is used for loans and credit cards.

Can I earn more interest by moving money between accounts?

No. Moving money between accounts at the same bank does not change the interest rate. You earn interest based on your balance and the APY of the account you hold the money in. Switching to a different bank with a higher APY will earn you more, but moving money around within the same bank will not.

What happens to my interest if the bank fails?

Your deposits and all accrued interest are protected up to $250,000 per depositor per bank by the Federal Deposit Insurance Corporation (FDIC). If a bank fails, the FDIC pays you the full amount, including interest earned up to the date of failure. This protection applies to most savings accounts at FDIC-insured banks.