What you earn depends on the interest rate and how much 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 depends on two things: the interest rate the bank offers, and how much money sits in your account. A higher rate and a larger balance mean more earnings. A lower rate or smaller balance means less.
The earnings are usually small. If you have $1,000 in an account earning 4% per year, you would earn about $40 over twelve months. That same $1,000 in an account earning 0.01% per year would earn about 10 cents. The difference between a good rate and a poor one matters more than most people realize.
Banks set their own rates, and rates change frequently — sometimes weekly. You cannot predict what you will earn next year based on what you earn today. The rate you see advertised is what new customers get right now, but your existing account may have a different (usually lower) rate.
Key Takeaways
- Interest earnings come from the bank's rate multiplied by your account balance, so both the rate and the amount you save affect your total earnings.
- Online banks typically offer higher rates than brick-and-mortar banks, sometimes 10 to 20 times higher for the same deposit amount.
- Interest rates change frequently and vary by bank, so comparing rates before opening an account or moving money can significantly increase what you earn.
- Your earnings are usually taxed as income, so you will owe taxes on the interest the bank pays you.
How interest rates are quoted and what they mean
Banks advertise an Annual Percentage Yield, or APY. This is the total percentage of your balance you will earn in one year if the rate stays the same and you do not add or withdraw money. If a bank advertises 4.5% APY and you have $10,000, you would earn roughly $450 over the year (the actual amount is slightly different because interest compounds, but 4.5% of $10,000 is the straightforward way to think about it).
The APY already includes compounding — the process where interest you earn starts earning interest too. You do not need to do anything for this to happen; the bank does it automatically. Compounding happens daily, weekly, or monthly depending on the bank. More frequent compounding means slightly more earnings, but the difference is usually small.
When you see a rate advertised, it is almost always the APY. Some banks show both APY and a related number called APR (Annual Percentage Rate), but for savings accounts, the APY is what matters. APR is mainly used for loans.
Why rates differ so much between banks
Online banks — banks with no physical branches — almost always offer higher rates than traditional banks with locations you can walk into. An online bank might offer 4.5% APY while a bank with branches in your town offers 0.01% APY on the same type of account. This is not because one bank is better; it is because online banks have lower costs (no buildings, fewer employees) and use higher rates to attract customers.
Banks also offer different rates for different account types. A money market account might earn more than a regular savings account at the same bank. A certificate of deposit (CD) — an account where you agree to leave money untouched for a set time — usually earns more than a savings account because the bank knows the money will stay put.
Your own account history can affect your rate too. Some banks offer a promotional rate to new customers, then lower the rate after a few months. Others lower rates for customers who have been with them a long time. Reading the fine print before opening an account tells you whether a rate is permanent or temporary.
Real examples of what different rates earn
Here is what $5,000 would earn in one year at different rates, assuming the rate does not change:
| Annual Interest Rate (APY) | Earnings in One Year | Where You Might Find This Rate |
|---|---|---|
| 0.01% | $0.50 | Traditional bank savings account |
| 0.5% | $25 | Some online banks (older accounts) |
| 2% | $100 | Online savings account (2023–2024) |
| 4.5% | $225 | Online savings account (current, varies) |
| 5.3% | $265 | Money market account or CD (varies) |
The difference between 0.01% and 4.5% is $224.50 per year on the same $5,000. Over five years, that gap grows to more than $1,100. This is why the rate you choose matters more than the size of your deposit when you are starting out.
These numbers assume you do not add or withdraw money during the year. If you deposit more money, you earn interest on the larger balance. If you withdraw money, you earn less.
How taxes affect what you actually keep
Interest you earn from a savings account is taxed as income. If you earn $225 in interest, you will owe federal income tax on that $225 (and possibly state income tax too, depending on where you live). The amount of tax depends on your total income and your tax bracket.
The bank will send you a form called a 1099-INT at the end of the year if you earned $10 or more in interest. You use this form when you file your taxes. You report the interest as income, and the IRS calculates how much tax you owe on it.
This means the actual money you keep is less than the interest the bank pays you. If you earned $225 and owe 22% in taxes, you keep about $175 and pay $50 in taxes. The higher your income, the higher your tax rate, and the less of the interest you keep.
How much you need to deposit to make interest worth tracking
There is no minimum amount that makes interest "worth it" — even small deposits earn something. But the smaller your balance, the smaller your earnings, and the less noticeable they become.
If you have $100 in an account earning 4.5% APY, you earn $4.50 per year before taxes. After taxes, you might keep $3 or $4. That is real money, but it is not life-changing. If you have $10,000 at the same rate, you earn $450 per year before taxes — much more noticeable.
The real value of a savings account is not the interest earnings; it is the safety and accessibility. You can withdraw your money whenever you need it, and the bank cannot lose it (up to the FDIC insurance limit of $250,000 per account). Interest is a bonus on top of that safety.
How to find the highest rate available right now
Rates change frequently, so the highest rate today might not be the highest rate next month. You can compare current rates on financial websites that track savings accounts — many list rates from dozens of banks updated daily or weekly.
When you find a rate you like, check the bank's website directly to confirm the rate is still current. Read the terms to see whether the rate is permanent or promotional. Some banks offer a high rate for the first few months, then drop it significantly.
Moving money between banks is free and takes a few days. If you find a bank offering a much higher rate than your current bank, moving your savings there can earn you hundreds of dollars per year with no effort on your part — just a one-time transfer.
Frequently Asked Questions
Can I lose money in a savings account?
No. The bank cannot take money from your account without your permission. Your deposits are insured by the FDIC up to $250,000 per account, meaning even if the bank fails, you get your money back. You earn interest (or sometimes earn nothing if the rate is very low), but you do not lose your principal.
What happens to my interest if I withdraw money before the year ends?
You earn interest on the balance you had during the time you held it. If you had $5,000 for six months, then withdrew $2,000, you earn interest on $5,000 for those six months, then on $3,000 for the remaining six months. You do not lose interest you already earned by withdrawing money.
Do I have to do anything to earn the interest?
No. Interest is added to your account automatically by the bank, usually monthly or daily depending on the bank. You do not need to take any action. The bank handles everything.
Why do some banks offer much higher rates than others?
Online banks have lower operating costs than banks with physical branches, so they can offer higher rates to attract customers. Traditional banks with locations in your town typically offer lower rates because their costs are higher. Both are safe; the difference is just how much they pay you for your deposit.
If I move my money to a higher-rate bank, do I have to close my old account?
No. You can keep money in multiple banks at the same time. Many people keep a small amount in a local bank for convenience and move larger amounts to online banks for higher rates. Just remember that FDIC insurance covers up to $250,000 per bank, so if you have more than that, spreading it across multiple banks protects all of it.