Interest is money the bank pays you for letting them hold your deposits

When you put money in a savings account, the bank lends that money out to other customers through mortgages, auto loans, and business credit lines. In exchange, the bank pays you interest—a percentage of your balance, calculated and added to your account on a schedule the bank sets. The rate varies by bank, by account type, and by how much money you have on deposit. You do not have to do anything to receive it; the bank calculates and deposits it automatically.

The amount you earn depends on three things: the interest rate the bank offers, how much money sits in the account, and how long it stays there. A $5,000 balance at 0.01% annual interest earns about 50 cents per year. The same balance at 4.5% earns roughly $225 per year. The difference between rates matters far more than the difference between banks once you have chosen the account type.

Key Takeaways

  • Banks calculate interest as a yearly percentage of your balance, though most deposit it monthly or daily.
  • High-yield savings accounts at online banks typically pay 4% to 5% annual interest, while traditional brick-and-mortar banks often pay under 0.5%.
  • Interest compounds when the bank adds earned interest back to your balance, so you earn interest on interest the following period.
  • Money market accounts and certificates of deposit (CDs) may pay higher rates than savings accounts, but often require larger deposits or lock your money away for a set time.

Annual percentage yield (APY) is the rate that matters when comparing banks

Banks advertise two different numbers: the interest rate and the annual percentage yield, or APY. The interest rate is the raw percentage. The APY includes the effect of compounding—the way interest earned gets added back to your balance and then earns interest itself in the next period. APY is always equal to or higher than the interest rate, and it is the number you should use when comparing one bank to another.

A bank might advertise "4.5% APY" on a savings account. That means if you deposit $10,000 and leave it untouched for one year, you will have $10,450 at the end. If you withdraw money during the year, the interest is calculated only on the balance you actually held. If you deposit more money mid-year, interest accrues on the new total from that point forward.

APY changes. Banks raise and lower their rates based on what the Federal Reserve does with its benchmark interest rate. When the Fed raises rates, banks typically raise savings rates within days or weeks. When the Fed cuts rates, banks often cut savings rates much more slowly. Check your bank's current rate before you move money; a rate that was competitive three months ago may no longer be.

High-yield savings accounts pay significantly more than traditional bank savings accounts

A traditional savings account at a brick-and-mortar bank—Chase, Bank of America, Wells Fargo—typically pays between 0.01% and 0.5% APY. An account earning 0.01% on $10,000 generates $1 per year. The same account at a high-yield savings bank earns roughly $400 to $500 per year at current rates.

High-yield savings accounts are offered by online banks and some credit unions. They pay more because they have lower overhead costs—no physical branches, no tellers, no building rent. Banks like Marcus, Ally, American Express Personal Savings, and Discover have historically offered rates near the top of the market. Credit unions like Connexus and Pentagon Federal also compete on rate. The highest rates change month to month as banks adjust to Fed policy and competition.

The tradeoff is access. You cannot walk into a branch or speak to a teller in person. Deposits and withdrawals happen online or by phone. For most people this is not a problem; transfers between accounts take one to three business days, and you can withdraw money whenever you need it. The account is still insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000, the same as any other bank account.

Money market accounts and CDs offer higher rates but with restrictions

A money market account is a hybrid between a savings account and a checking account. It typically pays interest higher than a regular savings account—often close to high-yield savings rates—but requires a larger opening deposit (often $2,500 to $10,000) and limits how many withdrawals you can make per month. Some money market accounts come with a debit card or checkbook, though the withdrawal limits still apply.

A certificate of deposit, or CD, locks your money away for a set period—three months, six months, one year, five years—in exchange for a may provide interest rate. The longer the term, the higher the rate. A one-year CD might pay 4.8% APY, while a five-year CD might pay 5.2%. If you withdraw the money before the term ends, the bank charges a penalty, usually equal to a few months of interest. CDs are useful if you know you will not need the money for a specific period and want to lock in a rate before rates fall.

Both money market accounts and CDs are FDIC-insured. Both are offered by traditional banks and online banks. Shop around; rates vary significantly, and a CD at one bank might pay 0.5% more than an identical CD at another.

Interest compounds, meaning you earn returns on your returns

Most banks compound interest daily or monthly. That means they calculate the interest owed on your current balance, add it to the account, and then calculate next period's interest on the new, higher balance. Over time, this creates a snowball effect.

Here is a concrete example. You deposit $10,000 in an account paying 4.5% APY, compounded daily. After one day, the bank adds roughly $1.23 to your account (4.5% ÷ 365 days). The next day, interest is calculated on $10,001.23, not $10,000. After one year, you have $10,460.13—not $10,450. The extra $10.13 came from compounding. The longer money sits in the account, the more noticeable the effect becomes. After five years at 4.5%, compounding adds roughly $250 to what you would earn with simple interest.

Compounding works in your favor only if you leave the money alone. Every withdrawal resets the clock on the balance the interest is calculated against.

How to find the current best rates and open an account

Interest rates change constantly. The best way to find current rates is to visit bank websites directly or use a rate comparison tool like Bankrate, DepositAccounts, or NerdWallet. These sites list rates from dozens of banks and update them daily. Search for "high-yield savings accounts" or "money market accounts" to see what is available right now.

Once you have chosen a bank, opening an account is straightforward. You will need a Social Security number, a government-issued ID, and proof of address (a utility bill or lease). Most online banks let you open an account in 10 to 15 minutes on their website. You can fund the account by transferring money from another bank account; the transfer usually takes one to three business days.

After the account is open, interest begins accruing immediately. You do not need to do anything. The bank calculates and deposits interest on the schedule it publishes—usually monthly or daily. You can check your balance and see the interest posted in your online banking portal.

What happens to interest if you close the account or withdraw money

Interest accrues only on money that actually sits in the account. If you withdraw $5,000 mid-month, interest for that month is calculated only on the balance after the withdrawal. If you close the account, the bank pays you the balance plus any interest accrued up to the closing date, usually within one to three business days.

Some banks charge a monthly fee if your balance falls below a minimum (often $500 to $2,500). The fee is deducted from your balance and can wipe out the interest you earned that month. Before opening an account, check whether there is a minimum balance requirement and what happens if you fall below it. Most high-yield savings accounts have no minimum balance and no monthly fees.

Frequently Asked Questions

Do I have to pay taxes on interest I earn?

Yes. Interest is taxable income. At the end of each year, the bank sends you a Form 1099-INT showing how much interest you earned. You report this on your tax return. The amount is usually small enough that it does not change your tax bracket, but you still owe tax on it.

Can I lose money in a savings account?

No. Savings accounts are FDIC-insured up to $250,000, meaning the government guarantees your deposit even if the bank fails. You cannot lose the principal. Interest rates can fall, so you might earn less than you did before, but your balance will not shrink.

Why do some banks pay so much less interest than others?

Traditional banks with physical branches have higher costs and less pressure to compete on rate because customers often stay with them for convenience. Online banks have no branches, so they pass the savings to customers through higher rates. Credit unions are member-owned and sometimes prioritize rate over profit.

Is it better to put money in a CD or a high-yield savings account?

CDs pay slightly more but lock your money away. If you might need the money within the next year, a high-yield savings account is safer because you can withdraw anytime without penalty. If you know you will not touch the money for two years or more, a CD locks in a rate and removes the temptation to spend.

How often is interest added to my account?

Most banks compound and deposit interest daily or monthly. Check your account agreement or the bank's website to see the schedule. Daily compounding is slightly better than monthly because interest accrues more frequently, but the difference is small—usually a few dollars per year on a typical balance.