What happens when you put money in a savings account
When you deposit money into a savings account, the bank takes that cash and lends it out to other customers — for mortgages, car loans, credit cards, and business lines of credit. You don't see this happen, but it's the core of how the bank makes money. In exchange for letting the bank use your money, you receive interest: a small percentage of your balance that the bank pays you regularly, usually monthly or daily.
Your money stays yours the entire time. You can withdraw it whenever you want (though some account types have limits). The bank is required by law to keep your deposits safe and to pay you back in full, even if the bank fails — that protection is called FDIC insurance and covers up to $250,000 per account holder per bank.
The interest rate the bank offers you depends on what the Federal Reserve is doing with interest rates nationally, how much competition exists in your area, and how much money you're keeping in the account. When the Fed raises rates, savings rates usually go up within weeks or months. When the Fed lowers rates, savings rates fall.
Key Takeaways
- The bank lends out your deposits to other customers and pays you interest in return — the rate varies based on Federal Reserve policy and your bank's competition.
- Interest is calculated daily or monthly and added to your balance automatically, so your money grows without you doing anything.
- You can withdraw your money anytime, but some savings accounts limit how many withdrawals you can make per month without a fee.
- Your deposits are protected up to $250,000 by FDIC insurance, even if the bank fails.
- The interest you earn is taxable income — you'll receive a 1099-INT form at tax time if you earned $10 or more in interest.
How interest gets calculated and added to your account
Banks calculate interest using your annual percentage yield (APY), which tells you the actual rate you'll earn over a full year. If your account has a 4.5% APY, the bank divides that by 365 days and applies a tiny fraction of that rate to your balance every single day. Those daily amounts add up and are usually deposited into your account once a month.
The more money you keep in the account and the longer you keep it there, the more interest you earn. This is called compound interest — once interest is added to your balance, the next month's interest is calculated on the larger amount, so you earn interest on your interest. Over years, this compounds into real money.
Different banks offer different rates. A large national bank might offer 0.01% APY, while an online bank might offer 4.5% or higher. The difference matters: on $10,000, that's $1 per year versus $450 per year. Shopping around for the highest rate takes 15 minutes and can save you hundreds of dollars over time.
Withdrawal limits and how they work
Federal rules used to cap savings account withdrawals at six per month, but that rule was suspended in 2020 and has not returned. Most banks now let you withdraw as much as you want, as often as you want, without penalty. However, some banks still impose limits or charge a fee for excess withdrawals — usually $10 per withdrawal after the sixth one in a month.
Check your account agreement or call your bank to confirm whether your specific account has withdrawal limits. If it does and you regularly need access to your money, consider switching to a bank with no limits, or moving to a checking account instead.
Withdrawals can happen at an ATM, at a branch, by phone, or online. ATM withdrawals from other banks' machines often cost $2 to $3 unless your bank reimburses those fees (some do). Online transfers to another bank account typically take one to three business days.
Why interest rates change and what that means for you
The Federal Reserve sets a target interest rate that banks charge each other for overnight loans. When the Fed raises this rate, banks eventually raise the interest they pay on savings accounts — usually within a few weeks. When the Fed lowers rates, savings rates fall, sometimes within days.
This means the rate you're earning today might be different in three months. If you locked in a 4.5% rate six months ago and rates have since fallen to 3.5%, your rate stays at 4.5% unless the bank changes it. But if rates rise to 5.5%, your bank might not raise your rate automatically — you may need to switch banks or move your money to a higher-yielding product to capture the new rate.
Checking your savings rate once or twice a year makes sense. If your bank is paying 0.5% and competitors are paying 4.5%, moving your money takes an afternoon and could earn you hundreds of dollars more per year.
Fees that can reduce your earnings
Most savings accounts have no monthly maintenance fee, but some do — typically $5 to $15 per month. A $10 monthly fee on a $5,000 balance earning 4% interest ($200 per year) wipes out most of your earnings. Always check the fee schedule before opening an account.
Other fees include overdraft fees (if you withdraw more than your balance), excess withdrawal fees (if you exceed the withdrawal limit), and ATM fees (if you use another bank's machine). Some banks waive these fees if you maintain a minimum balance — often $500 to $2,500 — or if you set up direct deposit.
Online banks typically charge fewer fees than brick-and-mortar banks because they have lower overhead costs. If fees are eating into your interest, switching to an online bank often makes financial sense.
How taxes work on savings account interest
Interest you earn in a savings account is taxable income. If you earn $10 or more in interest during a calendar year, the bank sends you a Form 1099-INT at tax time, and you must report that interest on your tax return. The interest is taxed at your ordinary income tax rate — the same rate as your salary or wages.
This means if you earn $500 in interest and you're in the 22% tax bracket, you'll owe about $110 in federal taxes on that interest. Some states also tax interest income. The bank does not withhold taxes automatically, so you may owe money at tax time if you don't plan for it.
If you earn less than $10 in interest, the bank doesn't send a 1099-INT, but you still owe taxes on that interest if you file a return. Keep your own records of interest earned.
Savings accounts versus other places to keep money
A savings account is designed for money you want to keep safe and accessible while earning a small return. A money market account works similarly but usually requires a higher minimum balance and pays slightly higher interest. A certificate of deposit (CD) locks your money away for a set period (three months to five years) in exchange for a higher interest rate — you pay a penalty if you withdraw early.
A checking account is for money you spend regularly; it typically pays little or no interest. A high-yield savings account is a savings account at an online bank that pays much higher interest than traditional banks — currently 4% to 5% — because the bank has lower costs.
For money you won't need for years, stocks and bonds may grow faster than savings accounts, but they carry risk. For money you need within a year, a savings account or CD is safer and more predictable.
Frequently Asked Questions
Can I lose money in a savings account?
No. FDIC insurance protects your deposits up to $250,000 per bank, even if the bank fails. Interest rates can fall, so you might earn less than you expected, but your principal is safe. The only way to lose money is if you withdraw more than you deposited.
How often is interest added to my account?
Interest is calculated daily but usually deposited monthly. Some banks deposit it quarterly or annually. Check your account agreement or ask your bank. The more often interest is deposited, the sooner it starts earning interest itself.
What's the difference between APR and APY?
APR (annual percentage rate) doesn't account for compound interest. APY (annual percentage yield) does. For savings accounts, always look at the APY — it's the real number that tells you what you'll actually earn in a year.
Should I keep all my money in a savings account?
Savings accounts are good for emergency funds and money you need within a year. For long-term goals (five years or more), you might earn more in CDs, bonds, or stocks. For money you spend regularly, use a checking account. Most people benefit from using multiple account types for different purposes.
What happens if I don't use my savings account for years?
Nothing bad happens. Your money stays there, earning interest. However, if you don't make any deposits or withdrawals for a very long time (usually five to seven years, depending on your state), the account may be considered dormant and turned over to the state as unclaimed property. You can still reclaim it, but the process takes longer.