What you earn depends on the bank's rate and how much you have saved
The interest you earn on a savings account is calculated by multiplying your balance by the annual percentage yield (APY) the bank offers, then dividing by 12 for each month. If you have $10,000 in an account paying 4.5% APY, you earn roughly $37.50 per month, or $450 per year. The actual amount varies because interest compounds — meaning you earn interest on your interest — but the difference is small in savings accounts.
The rate itself changes based on three things: which bank you use, what type of savings account you open, and what the Federal Reserve's benchmark rate is at that moment. A high-yield savings account at an online bank might pay 4.5% to 5.3% APY right now, while a traditional savings account at a brick-and-branch bank might pay 0.01% to 0.05%. That gap means the same $10,000 earns $450 per year at one bank and $1 per year at another.
Key Takeaways
- Your monthly interest earnings equal your account balance multiplied by the APY, then divided by 12, though the actual amount shifts slightly as interest compounds.
- Online banks and credit unions typically offer higher APY rates than traditional banks because they have lower overhead costs.
- The Federal Reserve's interest rate decisions affect what banks pay you, so rates rise and fall over time rather than staying fixed.
- Moving money to a higher-rate account can earn you hundreds of dollars per year on the same balance, so comparing rates before opening an account matters.
How banks decide what rate to offer you
Banks set their savings rates based on what the Federal Reserve charges them to borrow money. When the Fed raises its benchmark rate, banks eventually raise what they pay depositors. When the Fed cuts rates, banks lower what they offer you — sometimes within days, sometimes over weeks. This is why the same account might pay 5.3% one month and 4.8% the next.
Banks also compete for deposits. An online bank with no physical branches can afford to pay more interest because it spends less on buildings and staff. A large national bank with thousands of branches may pay less because it has higher costs. Credit unions, which are member-owned rather than profit-driven, often sit in the middle — paying more than big banks but sometimes less than the most aggressive online competitors.
The type of account also matters. A regular savings account typically earns less than a money market account or a high-yield savings account, even at the same bank. The difference is usually small — perhaps 0.5% to 1% — but it compounds over time.
Real examples of what different rates mean for your money
The difference between a 0.01% rate and a 5% rate is stark. On $5,000:
- At 0.01% APY: you earn $0.50 per year
- At 2.5% APY: you earn $125 per year
- At 5% APY: you earn $250 per year
On $50,000, those same rates earn you $5 per year, $1,250 per year, and $2,500 per year respectively. The larger your balance, the more the rate difference matters. Someone with $100,000 earning 0.01% makes $10 per year; the same person at 5% makes $5,000 per year.
Interest also compounds monthly at most banks, meaning you earn a tiny amount of interest on the interest you already earned. Over a year, this compounds to slightly more than simple multiplication would suggest, but the effect is small in savings accounts — usually adding less than 0.1% to your total return.
Why rates change and how often they shift
The Federal Reserve meets eight times per year to decide whether to raise, lower, or hold its benchmark rate steady. Banks do not have to match the Fed's moves immediately, but competitive pressure usually forces them to within a few weeks. When the Fed raises rates, you may see your bank's APY increase within days. When the Fed cuts rates, banks often cut what they pay you even faster.
Rates can also shift because a bank wants to attract or discourage new deposits. A bank that has plenty of customer money might lower its rate to reduce costs. A bank that needs deposits might raise its rate to stand out. This is why checking rates every few months makes sense if you have a large balance — you might find a better option without moving your money far.
How to find the highest rate for your situation
Online banks and credit unions publish their current rates on their websites. Comparison sites like Bankrate, DepositAccounts, and the Federal Deposit Insurance Corporation (FDIC) website list rates across multiple institutions, though they update periodically rather than in real time. Call or check the website of any bank you are considering to confirm the rate before you open an account.
Pay attention to whether a rate is promotional or permanent. Some banks offer a higher rate for the first three months, then drop it. Others offer a bonus if you deposit a certain amount within a set timeframe. Read the terms carefully — the highest advertised rate may come with conditions that do not apply to your situation.
Also check the minimum balance required to earn the stated rate. Some accounts require $25,000 or more to get the top APY; smaller balances earn less. A few banks tiered rates, meaning you earn one rate on the first $10,000 and a different rate on anything above that.
What happens to your interest if rates fall
If you lock in a 5% rate today and the Federal Reserve cuts rates next month, your bank will eventually lower what it pays you. There is no contract protecting your rate — banks can change what they offer at any time, usually with a few days' notice. This is different from a certificate of deposit (CD), where your rate is fixed for the entire term.
This is why a savings account is not a long-term rate lock. It is a place to keep money you might need soon while earning whatever the market currently offers. If you want to lock in a rate, a CD is the tool for that — you sacrifice access to your money in exchange for a may provide rate.
Frequently Asked Questions
Do I pay taxes on savings account interest?
Yes. The interest you earn counts as taxable income. Your bank will 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.
Why do some banks pay almost nothing on savings accounts?
Traditional banks with physical locations have higher costs and less pressure to compete on rate. They rely on customer convenience and brand recognition rather than offering the best rate. Online banks have no branches, so they can afford to pass savings to depositors through higher rates.
Can I move my money to a higher-rate account without losing interest?
Yes. Interest accrues up to the day you withdraw. You will not lose any interest you have already earned. You can move to a new bank and start earning the new rate immediately. Some banks offer a bonus for opening a new account, which can add to your earnings.
What is the difference between APY and APR on a savings account?
APY (annual percentage yield) includes the effect of compounding and is what you actually earn. APR (annual percentage rate) does not include compounding. Banks must show you the APY, so that is the number to compare between accounts.
Is my money safe if I move it to a bank offering a much higher rate?
If the bank is FDIC-insured, your deposits are protected up to $250,000 per account type. Check the FDIC's Bank Find tool to confirm a bank is insured. A higher rate does not mean the bank is risky — online banks often pay more simply because they have lower costs.