How savings accounts earn you money

A savings account earns money through interest—a percentage of your balance that the bank pays you regularly, usually monthly or daily. The bank lends out the money you deposit to other customers and businesses, and shares a portion of what it earns back to you as interest. The amount you earn depends on three things: how much money sits in the account, how long it stays there, and the interest rate the bank offers.

The interest rate varies widely. A savings account at a large national bank might pay 0.01% annually, meaning $100 would earn about 10 cents per year. A high-yield savings account at an online bank might pay 4% to 5%, meaning the same $100 would earn $4 to $5 per year. The difference matters more the larger your balance is. With $10,000, the difference between 0.01% and 4.5% is roughly $450 per year.

Interest compounds, which means you earn interest on your interest. If your account compounds daily, the bank calculates and adds interest every single day, and tomorrow's interest is calculated on today's new balance. This happens automatically—you do nothing. Over months and years, compounding adds real money to your account, especially at higher rates.

Key Takeaways

  • Banks pay you interest as a percentage of your balance, and the rate varies from under 0.01% at large national banks to 4% or higher at online banks.
  • Interest compounds regularly (usually daily), meaning you earn interest on the interest already added to your account.
  • The Federal Reserve sets a benchmark rate that influences what banks offer, and rates change when the Fed moves—currently they are higher than they were in 2020 to 2021.
  • Money market accounts and certificates of deposit (CDs) often pay more than traditional savings accounts, but come with different rules about when you can withdraw.
  • The interest you earn is taxable income, and your bank will report it to the IRS on a 1099-INT form if you earn $10 or more in a year.

Why interest rates change and what affects yours

The Federal Reserve sets a benchmark interest rate that influences what banks offer on savings accounts. When the Fed raises its rate, banks typically raise what they pay you. When the Fed lowers its rate, banks lower yours. The Fed raised rates significantly between 2022 and 2023 to fight inflation, which is why savings rates climbed from near zero to 4% or higher. If the Fed cuts rates in the future, savings rates will likely fall again.

Your specific rate also depends on the bank itself. Online banks with lower overhead costs often pay more than brick-and-mortar banks. Credit unions sometimes pay more than banks, though they serve members rather than the general public. Some banks offer promotional rates for new customers—higher rates for a limited time—to attract deposits. These promotional rates eventually drop to the bank's standard rate.

The type of account matters too. A regular savings account typically pays less than a high-yield savings account at the same bank. Money market accounts (which function like savings accounts but may require a higher minimum balance) often pay more. Certificates of deposit (CDs), where you lock money away for a set period like six months or two years, usually pay the most because the bank knows it can use your money for that entire time without you withdrawing it.

How to calculate what you'll earn

The basic formula is: Balance × Annual Interest Rate ÷ 365 = Daily Interest. If you have $5,000 in an account paying 4.5% annually, you earn roughly $5.48 per day. Over a month, that's about $164. Over a year, $225.

Most banks show you the Annual Percentage Yield (APY), which accounts for compounding. This number is more useful than the interest rate alone because it shows what you'll actually earn. A bank might advertise a 4.5% interest rate, but if it compounds daily, the APY might be 4.60%—slightly higher because of compounding.

You can use an online calculator to estimate earnings, but the simplest approach is to check what your specific bank shows in your account details. Most banks display your current APY and an estimate of what you'll earn over the next month or year based on your current balance. This estimate updates as your balance changes.

Comparing savings accounts to other ways to grow money

Savings accounts are safe but slow. Your money is insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per account, per bank. You can withdraw whenever you want (though some accounts limit withdrawals). But the interest rates are low compared to other investments.

Money market accounts pay more than savings accounts but usually require a higher minimum balance—often $2,500 to $10,000—and may limit how many withdrawals you can make per month. Certificates of deposit (CDs) pay the most of the three, but lock your money away for a set term. If you withdraw early, you pay a penalty that can wipe out months of interest.

Stock market investments and bonds can earn more over time, but they carry risk. Your money can lose value. Savings accounts, money market accounts, and CDs do not—your balance only goes up (or stays the same if rates are very low). The trade-off is lower returns for safety and certainty.

What happens to your interest earnings at tax time

Interest you earn on a savings account is taxable income. If you earn $10 or more in interest during a calendar year, your bank will send you a 1099-INT form by January 31 of the following year. You report this on your federal tax return, and you owe income tax on it at your regular tax rate.

This matters more with larger balances or higher rates. If you earn $500 in interest and you are in the 22% tax bracket, you owe roughly $110 in federal tax on that interest. Some states also tax interest income. The interest itself is not taxed—only the amount you earn above your original deposit.

If you earn less than $10 in a year, the bank does not send a 1099-INT, but you may still owe tax on it depending on your total income and filing status. Keep records of your interest earnings even if you do not receive a form.

Strategies to maximize what you earn

Shop around. Rates vary significantly between banks. A high-yield savings account at an online bank might pay 4.5% while a national bank pays 0.05%. Over a year with $10,000, that difference is roughly $450. Checking rates takes 15 minutes and costs nothing.

Keep money in savings accounts for goals you will reach within a few years. For longer time horizons (five years or more), a CD ladder—buying multiple CDs with different maturity dates—or a diversified investment account may earn more. For money you need within months, a high-yield savings account beats a CD because you can withdraw without penalty.

Move money to higher-rate accounts when rates rise. If you opened a savings account when rates were near zero and rates have since climbed to 4%, your old account may still pay 0.5%. Closing it and moving to a new account at a higher rate takes an afternoon and can add hundreds of dollars per year to your earnings.

Avoid accounts with monthly fees. Some banks charge $5 to $15 per month for savings accounts. At a 4.5% rate, you need roughly $13,000 in the account just to earn enough interest to cover a $10 monthly fee. A fee-free account is almost always the better choice.

Frequently Asked Questions

Can I lose money in a savings account?

No. Your balance is insured by the FDIC up to $250,000 per account, per bank. The interest rate can be very low (even 0.01%), but your original deposit is protected. The only way to lose money is if you withdraw more than you deposited, which is your choice, not the bank's.

How often does interest get added to my account?

Most banks compound and credit interest daily, meaning it is calculated every day and added to your balance monthly. Some credit it weekly or quarterly. Check your account details or ask your bank. Daily compounding is better because you earn interest on interest more frequently, though the difference is small over short periods.

What is the difference between APR and APY?

APR (Annual Percentage Rate) is the interest rate without compounding. APY (Annual Percentage Yield) includes the effect of compounding. APY is always equal to or higher than APR. Banks are required to show you the APY, which is the number that matters for comparing accounts.

Do I have to pay taxes on interest if I earn very little?

If you earn less than $10, your bank will not send a 1099-INT form. However, you may still owe tax depending on your total income and filing status. The safest approach is to report all interest income, even small amounts, on your tax return.

Is a high-yield savings account safe?

Yes, if the bank is FDIC-insured. Check the bank's website or call to confirm. Most online banks that offer high-yield savings are FDIC-insured and your money is protected up to $250,000. The higher rate does not mean higher risk—it usually just means lower overhead costs.