How much a savings account earns depends on the interest rate the bank offers and how much money you keep in the account
A savings account earns money through interest—a percentage of your balance that the bank pays you for letting them use your money. The amount you earn is calculated by multiplying your account balance by the interest rate, then dividing by the number of days in a year. If you have $10,000 in an account earning 4.5% annual interest, you earn roughly $450 per year, or about $37.50 per month, though the exact amount depends on how the bank compounds interest (daily, monthly, or annually).
Interest rates vary widely. Online banks currently offer rates between 4% and 5.35% on savings accounts. Traditional brick-and-mortar banks often offer rates below 0.5%. The difference matters: $10,000 earning 0.01% at a traditional bank earns $1 per year. The same $10,000 at 4.5% earns $450 per year. That gap widens the longer your money sits in the account.
Your earnings also depend on whether the bank uses straightforward interest or compound interest. straightforward interest pays you once on your original balance. Compound interest pays you on your balance plus the interest you have already earned—meaning you earn interest on your interest. Most savings accounts use daily compounding, which means interest accrues every single day and gets added to your balance, so the next day's interest is calculated on a slightly larger amount.
Key Takeaways
- Interest rates on savings accounts range from below 0.5% at traditional banks to over 5% at online banks, creating a difference of hundreds of dollars per year on the same balance.
- Your earnings equal your account balance multiplied by the annual interest rate, divided by 365 days, then multiplied by the number of days your money sits in the account.
- Compound interest means you earn interest on interest, so your balance grows slightly faster than with straightforward interest, though the difference is small on accounts under $100,000.
- Withdrawals reduce your balance when ready, so your earnings drop for the rest of that month or compounding period.
How interest rates are set and why they change
Banks set their savings account rates based on what the Federal Reserve charges them to borrow money. When the Fed raises its benchmark rate, banks eventually raise the rates they offer on savings accounts—though not always by the same amount, and not always quickly. When the Fed cuts rates, banks cut savings rates faster than they raised them.
The rate you see advertised is called the Annual Percentage Yield (APY), and it includes the effect of compounding. This is the number you should compare across banks. A bank might advertise "4.5% APY" or "5.25% APY"—these are the rates that matter for your decision. The older term, "Annual Percentage Rate" (APR), does not include compounding and is less useful for savings accounts.
Rates change frequently—sometimes weekly. If you lock in a rate today, it applies only to the money currently in your account. New deposits may earn a different rate depending on the bank's terms. Some banks may provide a rate for a set period; others change rates without notice. Read your account agreement or call the bank to understand whether your rate is fixed or variable.
What changes how much you actually earn
The balance you maintain is the biggest factor. A $50,000 account earning 4.5% earns $2,250 per year. A $5,000 account earning the same rate earns $225 per year. The rate is identical; the earnings scale with the balance.
How long your money stays in the account matters too. If you deposit $10,000 on January 15 and withdraw it on February 15, you earn interest for only 31 days, not 365. At 4.5% APY, that is roughly $38 in interest, not $450. Banks calculate daily interest, so every day your money is absent reduces your earnings proportionally.
Fees can erase your earnings. Some banks charge monthly maintenance fees ($5 to $15), overdraft fees, or fees for falling below a minimum balance. A $10 monthly fee on an account earning $37.50 per month means you lose 27% of your interest to fees. Read the fee schedule before opening an account, especially at traditional banks.
Compounding frequency matters slightly. Daily compounding earns you a bit more than monthly compounding on the same rate, because interest gets added to your balance every day and starts earning interest itself when ready. The difference is small—roughly 0.05% more per year—but it adds up on large balances over time.
Comparing what different account types earn
A standard savings account earns whatever rate the bank advertises, with no restrictions on withdrawals. A Money Market Account (MMA) often earns a slightly higher rate but may require a larger minimum balance ($2,500 to $25,000, depending on the bank) and limits you to six withdrawals per month. A Certificate of Deposit (CD) locks your money away for a set term (3 months to 5 years) and earns a fixed rate that is usually higher than a savings account, but you pay a penalty if you withdraw early.
High-yield savings accounts are standard savings accounts offered by online banks at higher rates. They are not a separate product—they are just savings accounts with better rates because online banks have lower overhead costs. They earn the same way as any other savings account: interest on your balance, compounded daily.
| Account Type | Typical Rate Range | Minimum Balance | Withdrawal Limits |
|---|---|---|---|
| Traditional Bank Savings | 0.01% to 0.5% | $0 to $500 | None |
| Online Savings Account | 4% to 5.35% | $0 to $25,000 | None |
| Money Market Account | 4.5% to 5.5% | $2,500 to $25,000 | 6 per month |
| 3-Month CD | 4.5% to 5.5% | $500 to $2,500 | Locked; early withdrawal penalty |
| 12-Month CD | 4.75% to 5.75% | $500 to $2,500 | Locked; early withdrawal penalty |
How to calculate your earnings on paper
The formula is: (Balance × Annual Interest Rate) ÷ 365 × Number of Days = Interest Earned. If you have $25,000 earning 4.5% and you keep it in the account for 90 days, the calculation is: ($25,000 × 0.045) ÷ 365 × 90 = $277.40. That is your interest for those 90 days.
Most banks show you the interest earned in your account statement or online dashboard. You do not have to calculate it yourself—the bank does it automatically. But knowing the formula helps you compare banks. If Bank A offers 4.5% and Bank B offers 5%, you can see when ready that Bank B will earn you roughly $125 more per year on a $25,000 balance.
Compound interest makes the math slightly more complex, but the effect is small on savings accounts. If your bank compounds daily, your balance grows by a tiny amount each day, so the next day's interest is calculated on a slightly larger number. Over a year, this compounds to roughly 0.05% more than straightforward interest would earn. On a $25,000 balance at 4.5%, that is about $12.50 extra per year—not nothing, but not life-changing.
Why your savings account earnings are taxed
Interest you earn on a savings account is taxed as ordinary income. If you earn $450 in interest in a year and your tax bracket is 22%, you owe roughly $99 in federal income tax on that interest. Some states also tax interest income. The bank reports your interest earnings to the IRS on a Form 1099-INT if you earn more than $10 in interest during the year.
This means your actual take-home earnings are lower than the interest the bank pays you. A 4.5% account earning $450 might net you only $350 after taxes, depending on your tax bracket. This is one reason people sometimes move money to tax-advantaged accounts like Roth IRAs or 529 plans, where interest earnings are not taxed (or are taxed differently).
Keep your 1099-INT form when it arrives in January. You will need it to file your taxes. If you earn interest from multiple banks, you will receive multiple 1099-INT forms—one from each bank.
What to do if your bank's rate drops
Banks lower savings rates when the Federal Reserve cuts its benchmark rate. You have no obligation to stay with a bank that lowers your rate. You can move your money to another bank offering a higher rate at any time, with no penalty (savings accounts have no early withdrawal fees). The process takes 3 to 5 business days if you use the receiving bank's transfer tool, or up to 10 days if you initiate a wire transfer yourself.
Before you move, check whether the new bank charges monthly fees or requires a minimum balance. A higher rate means nothing if fees eat the difference. Also confirm that the new bank's rate is may provide for a reasonable period—some banks offer promotional rates that drop after 3 or 6 months.
If you have been with your bank for years and the rate has dropped significantly, it is worth shopping around. The difference between 0.5% and 4.5% on a $50,000 balance is $2,000 per year. That is worth 30 minutes of your time to move the money.
Frequently Asked Questions
How often does the bank pay me interest?
Interest is calculated daily but usually deposited monthly. Some banks deposit quarterly or annually. Check your account agreement or call the bank to confirm. The frequency does not change how much you earn—only when you see the money appear in your account.
Do I lose interest if I withdraw money before the end of the month?
No. Banks calculate interest daily, so you earn interest for every day your money is in the account. If you deposit $10,000 on the 1st and withdraw $5,000 on the 15th, you earn interest on $10,000 for 14 days and $5,000 for the remaining days of the month. There is no penalty for withdrawing early from a savings account.
What is the difference between APY and APR?
APY (Annual Percentage Yield) includes the effect of compound interest, so it is the true rate you earn. APR (Annual Percentage Rate) does not include compounding. For savings accounts, always compare APY, not APR. APY is what you will actually earn.
Can I earn more than 5% on a savings account?
Rates above 5% are rare on standard savings accounts but do exist at some online banks. Rates change frequently based on Federal Reserve policy. CDs sometimes offer slightly higher rates than savings accounts, but your money is locked away for a set period. Check current rates at multiple banks to find the highest available.
What happens to my interest if the bank fails?
Your deposits and interest are protected by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per account holder per bank. If a bank fails, the FDIC pays you your full balance plus any interest earned up to that point. This protection applies to all savings accounts at FDIC-insured banks.