What interest means and how it gets added to your account
Interest is money the bank pays you for keeping your money in their account. When you deposit funds, the bank lends that money to other customers and businesses. In return, the bank shares a portion of what it earns with you—that share is your interest.
The bank calculates interest based on three things: how much money you have in the account, the interest rate the bank offers, and how long your money sits there. The interest rate is stated as an annual percentage rate, or APY. A 4.5% APY means the bank will pay you 4.5% of your balance over one year, though most banks add interest monthly or daily rather than in one lump sum at year's end.
Interest compounds, which means you earn interest on your interest. If you have $1,000 at 4.5% APY and the bank adds interest monthly, after the first month you might have $1,003.75. The next month, the bank calculates interest on $1,003.75, not just the original $1,000. Over time, compounding makes your balance grow faster than straightforward math would suggest.
Key Takeaways
- Interest rates vary by bank and change over time, so the APY you see today may be different in three months.
- High-yield savings accounts typically offer higher APY than traditional savings accounts at large banks, though they may have minimum balance requirements.
- Interest is taxable income, and the bank will send you a 1099-INT form if you earn $10 or more in a year.
- Moving money in and out of the account does not stop interest from accruing, but some banks charge fees if you withdraw more than six times per month.
How APY differs from interest rate
Banks sometimes advertise an interest rate and an APY as if they are the same thing, but they are not. The interest rate is the percentage the bank pays on your balance. The APY includes the effect of compounding—how many times per year the bank adds interest to your account.
A bank might offer 4.5% interest compounded daily. Because interest is added to your account 365 times per year, your actual annual return is slightly higher than 4.5%—the APY might be 4.60%. The difference grows larger with higher rates and more frequent compounding. Always compare banks using APY, not the stated interest rate, because APY shows what you will actually earn.
Where to find accounts that earn meaningful interest
Large national banks—Chase, Bank of America, Wells Fargo—typically offer savings account APY between 0.01% and 0.05%. At these rates, $10,000 earns roughly $1 to $5 per year. These banks prioritize lending and investment services over savings rates.
Online banks and credit unions often offer higher APY because they have lower overhead costs. Banks like Marcus, Ally, and American Express Personal Savings have offered APY between 4% and 5% in recent years, though rates change frequently. Credit unions vary widely; some offer competitive rates while others match large banks. You can check current rates on comparison sites, but verify the rate directly with the bank before opening an account, since rates shift weekly.
Money market accounts are a hybrid between savings and checking accounts. They typically offer higher APY than savings accounts but may require a larger minimum balance and limit how many times you can withdraw per month. Certificates of deposit (CDs) lock your money away for a set period—three months, one year, five years—and pay a fixed APY. You cannot withdraw without penalty, but the rate is may provide and usually higher than savings accounts.
How interest rates change and what affects them
Banks set their own APY, but they respond to the Federal Reserve's benchmark interest rate. When the Federal Reserve raises its rate, banks have more incentive to offer higher APY to attract deposits. When the Fed lowers its rate, banks typically lower their APY. This means the rate you see today may be 0.5% higher or lower in six months.
Your personal credit score, account history, and balance do not affect the APY a bank offers you. Everyone at the same bank gets the same rate. However, some banks offer promotional rates for new customers—a higher APY for the first three or six months—so the rate you earn as a new account holder may differ from what existing customers receive.
What happens to interest when you withdraw or deposit money
Interest accrues on your balance every day, even if you withdraw money mid-month. If you have $5,000 on the first of the month and withdraw $2,000 on the fifteenth, the bank calculates interest on the average balance or on the daily balance, depending on the account terms. You do not lose all interest because you made a withdrawal.
Deposits work the same way. Money you deposit begins earning interest when ready, though some banks have a grace period of one or two days before new deposits start accruing. Check your account agreement to see whether interest is calculated on the average daily balance or the lowest balance during the month—this affects how much you earn if your balance fluctuates.
Some savings accounts limit how many times you can withdraw per month without penalty. Federal rules once capped withdrawals at six per month, but that rule was suspended. Individual banks may still enforce limits, so check before opening an account if you plan to withdraw frequently.
Tax implications of savings account interest
Interest you earn is taxable income. The bank reports it to the IRS on a 1099-INT form if you earn $10 or more in a calendar year. You report this interest on your tax return as ordinary income, and it is taxed at your regular income tax rate.
If you earn less than $10, the bank does not send a 1099-INT, but you are still required to report the interest if you file a tax return. Keep your own records of interest earned, especially if you have multiple savings accounts. Some people move money between accounts to keep interest below $10 per account to avoid the 1099-INT, but this does not reduce your tax liability—you owe tax on all interest regardless of whether the bank reports it.
Comparing savings accounts side by side
| Account Type | Typical APY Range | Minimum Balance | Withdrawal Limits | Best For |
|---|---|---|---|---|
| Traditional savings (large bank) | 0.01% to 0.05% | $0 to $500 | Usually none | Convenience, branch access |
| High-yield savings (online) | 4% to 5% | $0 to $25,000 | Usually none | Maximum interest earnings |
| Money market account | 3% to 5% | $2,500 to $25,000 | 3 to 6 per month | Higher rate with some access |
| Certificate of deposit (CD) | 4% to 5.5% | $500 to $100,000 | None until maturity | Locked-in rate, longer timeline |
Frequently Asked Questions
Can I lose money in a savings account that earns interest?
No. The bank cannot take money from your account. Interest only adds to your balance. However, if the bank charges monthly fees and you do not maintain a minimum balance, fees can exceed the interest you earn, leaving you with a net loss. Read the fee schedule before opening an account.
What is the difference between APY and APR?
APY is annual percentage yield—what you actually earn on savings. APR is annual percentage rate—what you pay on borrowed money like credit cards or loans. For savings accounts, always look at APY. For debt, APR is the relevant number.
Does my savings account interest get added every month?
Most banks add interest monthly, but some add it daily or quarterly. Check your account agreement. Daily compounding usually results in slightly higher earnings than monthly compounding, but the difference is small unless your balance is very large.
If interest rates drop, will my savings account APY drop too?
Yes, usually within weeks. Banks adjust their APY in response to Federal Reserve changes. If you lock money into a CD, the rate stays fixed for the term, but savings account rates are variable and can change anytime.
Do I have to report savings account interest under $10 on my taxes?
The bank does not report it, but you are still required to report all interest income on your tax return if you file one. Keep your own records of interest earned across all accounts.