Yes, but the growth is small and depends on the interest rate your bank offers
Money in a savings account grows through interest—a percentage of your balance that the bank pays you for letting them use your money. If you deposit $1,000 in an account earning 4% annual interest, the bank adds $40 to your account over one year. That growth happens automatically; you do nothing except keep the money there.
The catch is that interest rates vary widely between banks. A savings account at one bank might earn 4.5% per year, while another earns 0.01%. Over time, that difference compounds—meaning you earn interest on your interest—so the bank you choose matters more than most people realize.
Your money does not grow if you keep it in cash under a mattress or in a checking account that pays no interest. A savings account is specifically designed to reward you for not spending the money right away.
Key Takeaways
- Banks pay you interest on savings account balances, expressed as an annual percentage rate (APR), and this interest is added to your account automatically.
- Interest rates differ between banks—some offer 4% or higher, while others offer less than 0.1%—so comparing rates before opening an account saves you real money over time.
- Interest compounds, meaning you earn interest on the interest already added, so leaving money untouched for longer increases your total growth.
- High-yield savings accounts at online banks typically offer higher rates than traditional brick-and-mortar banks because they have lower operating costs.
How interest rates are set and why they change
Banks set their own interest rates, but they are influenced by the Federal Reserve, which sets a benchmark rate that affects the entire economy. When the Federal Reserve raises its rate, banks tend to raise savings account rates. When it lowers the rate, banks usually lower theirs too. This means the interest rate you earn today may not be the same six months from now.
Banks also adjust rates based on competition. If many banks are offering 4.5% and yours is offering 1%, you might move your money, so your bank may raise its rate to keep you. Online banks often offer higher rates because they do not pay for physical branches, staff, or ATM networks—they pass those savings to customers.
The rate you see advertised is the Annual Percentage Rate (APR), which is what you would earn if you left the money untouched for a full year. Some banks compound interest daily, weekly, or monthly, which means you earn slightly more than the stated rate because interest gets added more frequently.
The math: how compound interest works over time
Compound interest is interest earned on interest. If you deposit $5,000 at 4% APR compounded annually, after one year you have $5,200. In year two, you earn 4% on $5,200, not just the original $5,000, so you gain $208 instead of $200. The difference grows each year.
Here is what $5,000 grows to over different time periods at 4% APR, compounded daily (which is common for high-yield accounts):
| Time Period | Account Balance | Interest Earned |
|---|---|---|
| After 1 year | $5,204 | $204 |
| After 5 years | $6,104 | $1,104 |
| After 10 years | $7,459 | $2,459 |
| After 20 years | $11,097 | $6,097 |
The longer money sits untouched, the more compound interest works in your favor. This is why starting early, even with small amounts, matters for long-term savings.
Why the interest rate matters more than you think
The difference between a 0.5% account and a 4.5% account looks small, but it is not. On $10,000 over five years, the low-rate account earns about $255 in interest. The high-rate account earns about $2,450. That is a $2,195 difference for doing nothing except choosing the right bank.
Interest rates also change, so an account earning 4.5% today might earn 3% next year if the Federal Reserve lowers rates. You cannot lock in a rate at most savings accounts—the bank can change it whenever they want. Some banks lower rates quickly when the market shifts, while others hold rates steady longer to attract customers.
This is why checking your bank's current rate once or twice a year makes sense. If your rate has dropped significantly and other banks are offering more, moving your money takes about 15 minutes and costs nothing.
What reduces or stops your money from growing
Several things can eat into your interest earnings. Inflation—the rising cost of goods and services—can outpace your interest rate. If inflation is 3% and your account earns 2%, your money is actually losing purchasing power even though the dollar amount is growing. This is why comparing your interest rate to current inflation matters.
Monthly fees also reduce growth. Some savings accounts charge $5 to $10 per month for maintenance, overdrafts, or low balances. Over a year, a $5 monthly fee costs $60, which might exceed the interest you earned. Read the fee schedule before opening an account.
Withdrawals do not stop growth, but they reduce the balance that earns interest. If you withdraw $2,000 from a $10,000 account, you now earn interest only on $8,000. This is why savings accounts work best for money you do not plan to touch.
How to find the best rate for your situation
Online banks almost always offer higher rates than traditional banks. As of recent months, online high-yield savings accounts earn between 4% and 5.35% APR, while many brick-and-mortar banks earn less than 0.5%. You can compare current rates on financial websites that track savings account offerings, though rates change frequently.
When comparing accounts, look at three things: the APR, how often interest compounds, and whether there are monthly fees. An account earning 4.5% compounded daily with no fees beats an account earning 4.6% compounded monthly with a $5 monthly fee.
You do not need a large balance to start. Most online banks let you open an account with $0 or $1. Some traditional banks require $500 or $1,000 minimums, and some charge fees if your balance drops below that minimum. Avoid those unless you have a specific reason to use that bank.
Frequently Asked Questions
Can I lose money in a savings account?
No. Your principal—the money you deposit—is protected by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per account at each bank. You will not earn much interest in a low-rate account, but you will not lose what you put in. The only way to lose money is if inflation outpaces your interest rate, meaning your money buys less over time.
What is the difference between a savings account and a money market account?
Money market accounts often earn slightly higher interest than savings accounts and may come with a debit card or checkbook, but they usually require a higher minimum balance ($2,500 to $10,000) and limit how many withdrawals you can make per month. For most people, a high-yield savings account offers better rates without the restrictions.
How often is interest added to my account?
Interest is usually compounded and added daily, weekly, or monthly depending on the bank. Daily compounding is most common and earns you slightly more because interest gets added more frequently. You can ask your bank how often they compound, or check your account statement—it will show when interest was credited.
Should I move my money if my bank lowers its rate?
If your rate drops significantly below what other banks are offering, moving makes sense. Opening a new account takes 10 minutes online, and transferring money takes one to three business days. If you have been earning 0.5% and other banks offer 4%, the difference over a year is substantial enough to justify the switch.
Does interest count as income for taxes?
Yes. Interest earned in a savings account is taxable income. If you earn $100 or more in interest during a year, your bank will send you a 1099-INT form, and you report that interest on your tax return. This is another reason why high-yield accounts matter—earning 4% instead of 0.5% means more interest to report, but also more money in your account.