Yes, a savings account makes money through interest

A savings account makes money by paying you interest — a percentage of the money you keep in the account. The bank uses your deposits to lend to other customers, and it shares a small portion of what it earns with you as a reward for letting them use your money. The more you deposit and the longer you leave it there, the more interest you earn.

The amount you earn depends on two things: how much money sits in your account, and the interest rate the bank offers. Interest rates change over time and vary between banks. A bank offering 4.5% annual interest will pay you more than one offering 0.01%, even if you deposit the same amount.

Interest is real money. If you deposit $1,000 in an account earning 4% per year, the bank adds $40 to your account after twelve months. That $40 is yours to keep or spend. The next year, you earn interest on $1,040, not just the original $1,000 — this is called compound interest, and it means your money grows faster the longer it sits.

Key Takeaways

  • Banks pay you interest as a percentage of your account balance, and that percentage is called the interest rate.
  • Interest rates vary between banks and change over time, so comparing rates before opening an account matters.
  • Compound interest means you earn interest on your interest, so money grows faster the longer it stays in the account.
  • High-yield savings accounts at online banks typically offer higher rates than traditional brick-and-mortar banks.
  • Interest is taxable income, so you will receive a tax form from your bank at the end of the year if you earn more than a small amount.

How interest rates are set and what affects them

Banks set their own interest rates based on what the Federal Reserve does. The Federal Reserve is the central bank of the United States, and it sets a target range for the interest rate that banks charge each other to borrow money overnight. When the Federal Reserve raises its rate, banks usually raise the rates they offer on savings accounts. When it lowers its rate, savings account rates typically fall too.

The type of bank also matters. Online banks — banks with no physical branches — usually offer higher interest rates than traditional banks because they have lower costs. A traditional bank might offer 0.01% while an online bank offers 4.5% on the same type of account. Both are real banks with deposit insurance, but the online bank can afford to pay more because it does not maintain buildings and staff in every city.

Competition between banks also pushes rates up and down. When many banks are offering high rates, others raise theirs to attract customers. When rates are falling across the industry, individual banks lower theirs too. This is why it pays to shop around before opening an account — the difference between a 4% rate and a 0.5% rate adds up quickly on larger balances.

The difference between straightforward and compound interest

straightforward interest means the bank pays you interest only on the money you originally deposited. If you put $1,000 in an account earning 5% straightforward interest per year, you earn $50 the first year, $50 the second year, and $50 every year after that. Your balance grows, but only by the same amount each year.

Compound interest means the bank pays you interest on your original deposit plus all the interest you have already earned. After the first year, your $1,000 at 5% becomes $1,050. In year two, you earn 5% on $1,050, which is $52.50. In year three, you earn 5% on $1,102.50, which is $55.13. The amount you earn each year gets slightly larger because you are earning interest on a larger balance.

Most savings accounts use daily compound interest, which means the bank calculates and adds interest to your account every single day. This is better for you than monthly or yearly compounding because your money grows a little faster. The difference is small on small balances, but on larger amounts or over many years, compound interest can add thousands of dollars to your account.

Why some accounts earn more than others

A high-yield savings account is a savings account that pays a significantly higher interest rate than a standard savings account at the same bank. High-yield accounts are usually offered by online banks or by credit unions. They work exactly like regular savings accounts — you deposit money, the bank pays you interest, and you can withdraw whenever you need to — but the interest rate is much higher.

The catch is that high-yield accounts sometimes come with requirements. Some require a minimum balance to earn the advertised rate, meaning if your balance drops below that amount, the rate falls. Others limit how many withdrawals you can make per month without a fee. Read the account terms before opening to understand what is required to earn the best rate.

Money market accounts are another option. A money market account is a hybrid between a savings account and a checking account. It typically pays interest like a savings account but also comes with a debit card or checkbook so you can spend the money more easily. Money market accounts usually pay less interest than high-yield savings accounts but more than standard savings accounts.

How to calculate what you will earn

To estimate how much interest you will earn, you need three pieces of information: the amount you are depositing, the annual interest rate, and how long you plan to leave the money in the account. If you deposit $5,000 at 4% annual interest and leave it for one year, you earn roughly $200 (4% of $5,000). If you leave it for two years with compound interest, you earn closer to $408 because you earn interest on the interest.

Most banks show you an estimate of annual earnings when you open an account. They list something called APY, which stands for Annual Percentage Yield. APY includes the effect of compound interest, so it is more accurate than the basic interest rate. If a bank shows you 4% APY, that is what you will actually earn over a year, accounting for daily compounding.

You can also use online calculators to estimate your earnings. Search "savings account interest calculator" and enter your deposit amount, the APY, and the number of years. The calculator shows you how much you will have at the end. This helps you compare accounts — you can see that $5,000 at 4.5% APY grows more than $5,000 at 0.5% APY, even though both are real accounts at real banks.

When interest earnings are taxed

Interest you earn on a savings account is taxable income. This means you owe federal income tax on the money the bank pays you. If you earn $100 in interest during a calendar year, that $100 counts as income on your tax return, just like wages from a job.

At the end of each calendar year, your bank sends you a form called a 1099-INT if you earned $10 or more in interest during that year. You use this form when you file your taxes. If you earned less than $10, the bank does not send the form, but you still owe tax on the interest if you file a return.

The amount of tax you owe depends on your total income and your tax bracket. Someone earning $30,000 per year pays tax on interest earnings at a lower rate than someone earning $100,000 per year. If you are unsure how to report interest income, a tax preparer or the IRS website can walk you through it. The important thing to know is that the interest is real income, and you should expect to report it.

Comparing savings accounts to other places to put money

Savings accounts are not the only place to earn interest. Certificates of deposit (CDs) are accounts where you agree to leave money untouched for a set period — usually three months to five years — in exchange for a higher interest rate. If you withdraw the money early, you pay a penalty. CDs are good if you know you will not need the money for a specific amount of time.

Money market funds and bonds are other options, but they work differently than savings accounts and carry different risks. A savings account is the simplest and safest place to earn interest because your deposits are insured by the federal government up to $250,000 per account. Money in a savings account is always yours to withdraw, and you will not lose it if the bank fails.

For most people starting out, a high-yield savings account at an online bank is the best choice. You earn real interest, your money is safe and insured, you can withdraw whenever you need to, and there are no complicated rules. The interest rate is much higher than a traditional bank, and opening an account takes minutes online.

Frequently Asked Questions

How often does the bank add interest to my account?

Most banks calculate and add interest daily, but some add it monthly or quarterly. Daily compounding is better for you because your balance grows slightly faster. Check your account terms to see how often interest is added. Even with daily compounding, the difference is usually small unless you have a large balance.

Can I lose money in a savings account?

No. Your deposits are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per account at each bank. You cannot lose your principal, and the interest is real money the bank pays you. The only way your balance goes down is if you withdraw money yourself.

What happens to my interest if I withdraw money before the year ends?

You still keep all the interest you have earned up to that point. If you deposit $1,000 on January 1 and withdraw it on June 30, you earn interest for six months, not the full year. The bank calculates interest based on how long your money actually sat in the account.

Why do some banks offer 0% interest?

Banks that offer very low or zero interest are usually traditional brick-and-mortar banks with high operating costs. They can afford to pay less because customers use their branches and ATMs. Online banks have lower costs, so they can afford to pay higher rates and still make a profit. You are not required to use a low-interest bank — shopping around takes minutes and can earn you hundreds of dollars per year.

Is the interest rate may provide to stay the same?

No. Banks can change interest rates at any time, usually in response to changes by the Federal Reserve. A rate that is 4.5% today might be 3.5% next month. This is why high-yield accounts are good for money you plan to keep in savings — you benefit from high rates while they last, and if rates fall, you can move your money to a different bank offering a better rate.