Yes, savings accounts build interest, but the amount depends on the rate your bank offers and how much you have saved
A savings account earns interest when the bank pays you a percentage of the money you keep deposited. The bank uses your money to lend to other customers and invests it; in return, they share a portion of what they make with you. The interest gets added to your account balance, usually monthly or daily, depending on the bank's terms. Over time, that interest compounds — meaning you earn interest on the interest you've already earned — so your balance grows without you adding more money.
The catch is that interest rates vary widely. A bank might offer 0.01% annual interest, while another offers 4.5% or higher. The difference between these rates is enormous over time. At 0.01%, $10,000 earns about $1 per year. At 4.5%, the same $10,000 earns about $450 per year. Your bank's rate depends on what the Federal Reserve has set, what type of savings account you have, and how much competition exists in your area.
Key Takeaways
- Banks pay interest as a percentage of your balance, and the rate varies by bank and account type — checking accounts typically earn little to nothing, while high-yield savings accounts earn significantly more.
- Interest compounds, meaning you earn returns on money you've already earned, so leaving money untouched for longer periods increases your total gain.
- The Federal Reserve's interest rate decisions affect what banks offer, so rates change over time and differ between institutions.
- You can find current rates by checking your bank's website, calling, or using rate-comparison sites that list what different banks are currently paying.
How interest rates are set and why they change
The Federal Reserve sets a target interest rate that influences what banks pay on savings. When the Fed raises its rate, banks typically raise what they pay depositors. When the Fed lowers its rate, banks usually lower what they pay you. This happens because banks' costs change, and they adjust what they offer to stay competitive.
Individual banks also set their own rates based on how much money they need to attract and what they can earn by lending that money out. A bank that needs deposits badly might offer a higher rate. A bank with plenty of deposits might offer less. Online banks often pay higher rates than brick-and-mortar banks because they have lower overhead costs and can pass those savings to customers.
The difference between account types and what each earns
Not all savings accounts earn the same interest. A regular savings account at a traditional bank might earn 0.01% to 0.05%. A money market account typically earns slightly more, often 0.1% to 1%, but may require a higher minimum balance. A high-yield savings account, usually offered by online banks, currently earns 4% to 5% or higher, though this changes as Fed rates shift.
Checking accounts almost never earn interest, or earn so little it rounds to zero. Certificates of Deposit (CDs) lock your money away for a set period — three months, one year, five years — and pay a fixed rate that's usually higher than savings accounts, but you pay a penalty if you withdraw early. The tradeoff is simple: the less access you have to your money, the more interest the bank pays.
How to calculate what you'll earn
Interest is calculated using your balance and the annual percentage rate (APR). If you have $5,000 in an account earning 4% APR, you earn roughly $200 per year, or about $16.67 per month if interest compounds monthly. The exact amount depends on how often the bank compounds — daily compounding earns slightly more than monthly compounding because interest gets added more frequently.
Most banks show you the Annual Percentage Yield (APY) rather than APR on savings accounts. APY already includes the effect of compounding, so it's the number to use when comparing accounts. If an account shows 4.5% APY, that's what you'll actually earn over a year if you don't touch the money.
You can use a simple formula: multiply your balance by the APY, then divide by 12 to get your monthly earnings. For $10,000 at 4.5% APY, that's ($10,000 × 0.045) ÷ 12 = $37.50 per month. Online calculators also do this instantly if you enter your balance and rate.
When interest gets paid and how it shows up in your account
Banks add interest to your account on a schedule set in their terms. Some add it daily, some monthly, some quarterly. Daily compounding means interest gets calculated and added every single day, which compounds faster than monthly. You'll see the interest appear as a deposit in your transaction history, usually labeled "interest paid" or "interest earned."
The interest becomes part of your balance immediately, so it's yours to keep. If you withdraw money, the interest you've already earned stays with you. If you leave the money untouched, next month's interest calculation includes the previous month's interest, which is how compounding works.
How to find the best rate for your situation
Check your current bank's website first — they list their rates prominently. Then compare with online banks and other local institutions. Rate-comparison sites like Bankrate, DepositAccounts, and NerdWallet show current rates across many banks, updated regularly. Call banks directly if you want to confirm a rate before opening an account.
Consider what matters to you beyond rate: do you need to access your money frequently, or can you lock it away? Do you want a physical branch, or is online-only fine? Do you have the minimum balance the bank requires? A slightly lower rate at a bank you trust and can easily reach might be worth more than chasing the absolute highest rate at an institution you're unfamiliar with.
What happens to your interest if rates drop
If the Federal Reserve lowers rates, your bank will eventually lower what it pays you. This doesn't happen instantly — banks may wait weeks or months — but it will happen. Your existing balance doesn't shrink; you just earn less on new deposits and future interest. If you're in a high-yield account earning 4.5% and rates drop, you might see that fall to 3% or lower over time.
This is why some people move money between accounts when rates change. If your current bank drops its rate significantly and another bank offers much more, you can withdraw and deposit elsewhere. There's no penalty for moving savings between banks, though it takes a few business days for the transfer to complete.
Frequently Asked Questions
Do I have to pay taxes on interest I earn?
Yes. Interest income is taxable as ordinary income. Your bank sends you a 1099-INT form at tax time if you earned $10 or more in interest during the year. You report this on your tax return. The amount you owe depends on your tax bracket, so a higher interest rate means a slightly higher tax bill, though you still come out ahead.
Can I lose money in a savings account?
No, as long as your bank is FDIC-insured, which nearly all U.S. banks are. The FDIC guarantees deposits up to $250,000 per account holder per bank. Your balance won't shrink due to market changes or bank failure. Interest rates can drop, so you earn less, but your principal stays intact.
Why do some banks offer much higher rates than others?
Online banks have lower costs than brick-and-mortar branches, so they can pay more. Banks that need deposits badly also offer higher rates to attract money. Traditional banks with many branches and physical overhead often pay less because their costs are higher. The rate difference is real and worth shopping for.
What's the difference between APR and APY?
APR is the annual percentage rate before compounding. APY is the annual percentage yield after compounding is included. For savings accounts, always compare using APY because it shows what you'll actually earn. APR is more commonly used for loans.
Does keeping money in savings for longer earn more interest?
Yes, because of compounding. The longer money sits untouched, the more interest compounds on top of itself. $5,000 earning 4% APY grows to about $5,200 after one year, $5,408 after two years, and $5,624 after three years — the growth accelerates because you're earning interest on interest.