What you earn depends on the interest rate, how much you deposit, and how long you leave it there
A savings account earns money through interest—a percentage of your balance that the bank pays you each month or year. The amount you earn is not fixed. It changes based on three things: the interest rate the bank offers, the total amount sitting in your account, and how long that money stays there.
If you put $1,000 in an account earning 4% annual interest, you will earn roughly $40 per year—or about $3.33 per month. If you put $10,000 in the same account, you earn roughly $400 per year. The math is straightforward, but the rates themselves move around. Banks change their rates based on what the Federal Reserve does, so what you earn today may not be what you earn six months from now.
Key Takeaways
- Interest rates on savings accounts vary by bank and change over time, so the rate you see today may be different in three months.
- High-yield savings accounts typically pay 4% to 5% annually, while traditional bank savings accounts often pay less than 1%.
- You earn interest on your full balance each month or year, and some banks compound that interest so you earn money on your earnings too.
- The longer your money sits untouched, the more interest it accumulates, but most savings accounts let you withdraw anytime without penalty.
How interest rates differ between account types
Not all savings accounts pay the same rate. A traditional savings account at a large bank might pay 0.01% to 0.5% annually. A high-yield savings account at an online bank or credit union typically pays 4% to 5% annually, though this varies month to month. The difference is real money: $10,000 earning 0.1% makes $10 per year, while $10,000 earning 4.5% makes $450 per year.
Online banks and credit unions usually offer higher rates because they have lower overhead costs than brick-and-mortar branches. Banks also raise or lower their rates based on Federal Reserve decisions. When the Fed raises its benchmark rate, banks tend to raise savings rates within weeks or months. When the Fed cuts rates, banks follow—sometimes quickly, sometimes slowly.
The rate you see advertised is called the annual percentage yield (APY). This is the real rate you earn after the bank compounds your interest. Always compare APY, not just the interest rate, because APY tells you the true return.
How compounding multiplies your earnings over time
Most savings accounts use daily compounding, meaning the bank calculates interest on your balance every single day and adds it to your account. The next day, you earn interest on that new, slightly larger balance. This creates a snowball effect where your money grows faster than simple math suggests.
With $5,000 earning 4.5% APY compounded daily, you earn roughly $225 in the first year. But that $225 is added to your account, so in year two you earn interest on $5,225, not just $5,000. Over ten years, daily compounding means you earn noticeably more than you would with simple interest. The longer the money sits, the bigger the difference.
Some accounts compound monthly or quarterly instead of daily. Daily compounding is better for you, but the difference is small unless your balance is very large or you are leaving money untouched for years.
What happens when interest rates change
Banks adjust their rates regularly, and you need to know how that affects what you earn. If you open a high-yield account earning 4.5% and the Federal Reserve cuts rates three months later, your bank may drop its rate to 3.5%. Your earnings drop immediately—you now earn less on the same balance.
The opposite also happens. If rates rise, your bank may raise its rate too, and you earn more. Some banks move faster than others. Online banks often adjust within days of a Fed decision, while traditional banks may wait weeks.
You can shop around if your rate drops too far. Moving money to a different bank with a higher rate takes a few days, and there is no penalty for leaving a savings account. Many people move their money between banks to chase the highest available rate.
Calculating what you will earn with different balances
Here is how to estimate your own earnings. Take your account balance, multiply it by the APY as a decimal, and divide by 12 for a monthly estimate. A $20,000 balance at 4.5% APY earns roughly $75 per month (20,000 × 0.045 ÷ 12 = $75). Over a year, that is $900.
If you add money regularly, your earnings grow. Depositing $500 per month into a $10,000 account earning 4.5% APY means you earn interest on a growing balance. After one year you have roughly $16,000, and you have earned about $350 in interest. After five years, the balance is roughly $40,000 and you have earned roughly $3,500 in interest.
| Starting Balance | Monthly Deposit | APY Rate | Interest Earned (1 Year) | Balance After 1 Year |
|---|---|---|---|---|
| $5,000 | $0 | 4.5% | ~$225 | ~$5,225 |
| $10,000 | $500 | 4.5% | ~$350 | ~$16,350 |
| $25,000 | $0 | 4.5% | ~$1,125 | ~$26,125 |
| $50,000 | $1,000 | 4.5% | ~$3,250 | ~$65,250 |
These are estimates because compounding happens daily and rates may change. But they show the real pattern: bigger balances earn more, regular deposits speed up growth, and higher rates make a visible difference.
Where to find the current rates banks are offering
Interest rates change constantly, so checking a website today and checking again in two weeks may show different numbers. Websites like Bankrate, DepositAccounts, and NerdWallet list current rates from many banks and update them frequently. Your own bank's website shows what it is currently paying.
When you compare rates, look at the APY column, not the interest rate. Read the fine print for any minimum balance requirements—some banks pay high rates only if you keep a certain amount in the account. A few banks pay higher rates on the first tier of your balance and lower rates on amounts above that.
Credit unions sometimes pay higher rates than banks, but you must be a member. If you work for a large employer or belong to a union, you may already be a member of a credit union without knowing it. Checking your employer's benefits page or calling a local credit union can reveal options you did not know existed.
Why your earnings might be lower than the advertised rate
The APY you see advertised is the rate you earn if your money stays in the account for a full year without withdrawals. If you withdraw money partway through the month, you may earn interest only on the balance that stayed in for the full period. Some banks calculate interest based on your lowest balance during the month, not your average balance, which can reduce what you earn.
Fees also eat into earnings. If a bank charges a monthly maintenance fee of $5 and you are earning $10 per month in interest, your net gain is only $5. Always check whether the account has monthly fees, and whether those fees are waived if you keep a minimum balance or set up direct deposit.
Taxes reduce your earnings too. Interest income is taxable as ordinary income. If you earn $500 in interest in a year, you owe income tax on that $500. The bank will send you a 1099-INT form in January showing what you earned, and you report it on your tax return.
Frequently Asked Questions
Can I lose money in a savings account?
No. Savings accounts at banks and credit unions are insured by the FDIC or NCUA up to $250,000 per account holder per institution. Your balance will not shrink due to bank failure. However, if interest rates fall and your bank lowers its rate, you earn less—but you do not lose what you already have.
How often do banks pay interest?
Most banks compound interest daily but deposit it monthly. You see the interest added to your balance once per month, usually on the last day or first day of the month. Some banks pay quarterly or annually, which means you wait longer to see the money added, but the total amount earned over a year is the same.
Is it better to move money between banks to chase higher rates?
Moving money takes a few days and is free, so it makes sense if the rate difference is significant—say, 1% or more. Moving money for a 0.1% difference is not worth the hassle. Many people move money once or twice a year when rates shift noticeably, or they open new accounts at banks offering promotional rates for new customers.
What is the difference between a savings account and a money market account?
Money market accounts often pay slightly higher interest than savings accounts, but they may require a larger minimum balance and limit how many withdrawals you can make per month. For most people, a high-yield savings account offers better flexibility and competitive rates without the restrictions.
Do I have to report savings account interest on my taxes?
Yes. If you earn $10 or more in interest during the year, the bank sends you a 1099-INT form and you report it as income on your tax return. Even if you earn less than $10, you should report it. Interest income is taxable regardless of the amount.