Interest is how a savings account makes money for you
A savings account makes money through interest—a percentage of your balance that the bank pays you each month or year. The bank lends out the money you deposit to other customers, and shares a portion of what it earns back to you as interest. The more money you keep in the account and the higher the interest rate, the more you earn.
The amount you earn depends on two things: your account balance and the annual percentage yield (APY), which is the rate the bank offers. A $10,000 balance at 4.5% APY earns roughly $450 per year. The same balance at 0.01% APY earns about $1 per year. Banks change their rates frequently, so the rate you see today may not be the rate you get tomorrow.
Key Takeaways
- Interest rates on savings accounts vary widely between banks, from under 0.01% to over 5%, so comparing rates before opening an account matters.
- High-yield savings accounts at online banks typically pay more interest than traditional brick-and-mortar banks because they have lower overhead costs.
- Interest compounds over time, meaning you earn money on your interest as well as your original deposit, but only if you leave the money untouched.
- Withdrawals reduce your balance and therefore reduce the interest you earn that month or quarter, so frequent transfers cost you money.
- The interest rate a bank advertises today is not locked in—rates can drop or rise, and your earnings will change with them.
High-yield savings accounts pay significantly more than standard accounts
A high-yield savings account is a regular savings account that pays a much higher interest rate. Most online banks offer high-yield accounts because they don't operate physical branches and can pass those savings to customers. Traditional banks with storefronts typically offer rates under 0.5%, while online banks often offer 4% to 5% or higher.
The tradeoff is access. High-yield accounts usually require you to manage your money online or by phone rather than walking into a branch. You can still withdraw money whenever you need it, but the process takes a day or two instead of being instant. For money you're saving rather than spending, this delay rarely matters.
Banks that offer high-yield rates include Ally, Marcus, American Express Personal Savings, and others. Rates change constantly, so checking a rate comparison site or visiting banks' websites directly shows you what's available this week. The difference between a 0.01% account and a 5% account on $10,000 is roughly $500 per year—real money that adds up.
Compound interest grows your money faster over time
Compound interest means you earn interest on your interest. After your bank pays you interest in month one, that interest gets added to your balance. In month two, you earn interest on both your original deposit and the interest from month one. Over years, this effect becomes significant.
A $5,000 deposit at 4.5% APY grows to roughly $5,225 after one year if you never touch it. After five years, it grows to roughly $6,250. After ten years, roughly $7,750. The longer you leave the money alone, the more compound interest works in your favor. This is why starting early and leaving money untouched matters more than the exact rate.
The math works against you if you withdraw money frequently. Each withdrawal reduces your balance, which means less interest in the next period. If you move $1,000 out of your account every month, you're constantly resetting the compound interest clock and earning less overall.
Interest rates change, so your earnings will fluctuate
Banks don't lock in interest rates. When the Federal Reserve raises or lowers its benchmark rate, banks adjust what they pay on savings accounts. A rate of 5% today might drop to 3% in six months if the Fed cuts rates. Conversely, if the Fed raises rates, your bank may increase what it pays you.
This means the earnings you calculate today won't necessarily match what you actually earn next year. A $20,000 balance earning 4.5% for six months, then 2.5% for the next six months, earns roughly $700 total instead of $900. You have no control over rate changes, but you can move your money to a different bank if another bank offers a better rate.
Some banks raise rates quickly when the Fed moves, while others lag behind. Shopping around every few months—especially after the Fed announces a rate change—can mean hundreds of dollars in difference over a year.
Certificates of deposit lock in a rate but restrict access
A certificate of deposit (CD) is an account where you agree to leave your money untouched for a set period—usually three months to five years—in exchange for a higher interest rate. If you withdraw before the term ends, the bank charges a penalty that eats into your earnings.
CDs typically pay 1% to 2% more than regular savings accounts. A one-year CD might pay 5.5% while a high-yield savings account pays 4.5%. The extra 1% matters if you have a large balance and won't need the money. But if you withdraw early, you lose the advantage and may end up with less than you started with.
CDs make sense for money you know you won't touch—an emergency fund that's already fully funded, or savings for a specific goal a year or two away. They don't make sense for money you might need in the next few months.
Money market accounts combine features of savings and checking
A money market account is a hybrid that pays interest like a savings account but lets you write checks or use a debit card like a checking account. Interest rates on money market accounts fall between regular savings accounts and high-yield savings accounts—usually 1% to 3%.
The catch is that money market accounts often require a higher minimum balance to earn the advertised rate, and some charge monthly fees if your balance drops below that minimum. They also typically limit the number of withdrawals per month. If you need frequent access to your money, a regular checking account is simpler. If you want to earn interest and rarely touch the account, a high-yield savings account pays more.
Fees and minimum balances can erase your interest earnings
Some banks charge monthly maintenance fees, overdraft fees, or fees for falling below a minimum balance. A $5 monthly fee on an account earning $10 per month in interest wipes out half your earnings. Over a year, that's $60 lost to fees.
Before opening any account, read the fee schedule. Look for accounts with no monthly maintenance fee, no minimum balance requirement, and no fees for transfers or withdrawals. Online banks typically have fewer fees than traditional banks because they have lower costs to operate.
A high-yield account with no fees and a 4.5% rate beats a traditional bank account with a $5 monthly fee and a 0.1% rate, even if the traditional bank is more convenient. The math is clear: convenience costs money.
Frequently Asked Questions
How often does the bank pay interest on my savings account?
Most banks pay interest monthly or quarterly, though some pay daily. The frequency doesn't change how much you earn over a year—a 4.5% APY earns the same whether it's paid monthly or daily. Daily compounding is slightly better because interest gets added to your balance more often, but the difference is small.
Is the interest I earn on a savings account taxable?
Yes. Interest counts as income and is taxable at your regular tax rate. Banks 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. High-yield accounts that pay 4% or more can generate significant taxable income, so factor that into your planning.
Can I lose money in a savings account?
No. Savings accounts are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per bank. Your balance won't shrink due to market changes or bank failure. You can only lose money if you withdraw it yourself or if fees exceed your interest earnings.
What's the difference between APY and APR on a savings account?
APY (annual percentage yield) includes compound interest, while APR (annual percentage rate) does not. Banks advertise savings account rates as APY because it's the real number—what you actually earn. APR is used for loans and credit cards. Always compare APY to APY when shopping for accounts.
Should I keep all my money in a high-yield savings account?
High-yield savings accounts are good for emergency funds and short-term savings because your money stays accessible and earns interest. For long-term goals years away, investing in stocks or bonds through a brokerage account historically earns more, though with more risk. For money you need within months, a savings account is safer than investments.