Yes, money in a savings account grows through interest

Money in a savings account grows when the bank pays you interest — a percentage of the money you keep there. The bank uses your deposits to lend to other customers, and it shares some of the profit with you as a reward for letting them use your money. The amount you earn depends on the interest rate the bank offers and how long your money stays in the account.

The growth is usually small. If you have $1,000 in an account earning 4% interest per year, you would earn about $40 over twelve months. That $40 gets added to your account, so you would have $1,040. The next year, you earn interest on $1,040, not just the original $1,000. This is called compound interest — earning interest on your interest.

Different banks offer different interest rates. Some offer much higher rates than others, and rates change over time based on what the Federal Reserve does with its own interest rates. Shopping around for a bank with a higher rate means your money grows faster, even though the amount you deposit stays the same.

Key Takeaways

  • Banks pay you interest on the money you keep in a savings account, which is a percentage of your balance.
  • The interest rate varies by bank and changes over time, so the same $1,000 grows at different speeds depending on where you keep it.
  • Compound interest means you earn interest on the interest you already earned, so your account grows faster the longer money sits there.
  • Online banks and credit unions often offer higher interest rates than large traditional banks, so comparing rates before opening an account matters.
  • Interest earned in a savings account is taxable income, and your bank will report it to the IRS if it exceeds a certain amount.

How interest rates are set and why they change

Banks decide their own interest rates, but those decisions are influenced by the Federal Reserve, which is the central banking system of the United States. When the Federal Reserve raises its rates, banks typically raise the rates they offer on savings accounts. When the Federal Reserve lowers its rates, banks usually lower theirs too. This happens because banks' costs change, and they adjust what they pay you accordingly.

You might notice that interest rates on savings accounts were very low a few years ago — sometimes less than 0.01% — and then became much higher. That shift happened because the Federal Reserve raised its rates significantly starting in 2022. If rates fall again in the future, the interest you earn will likely fall too. This is why it makes sense to check your bank's rate periodically and consider moving your money if another bank is offering more.

The difference between savings accounts and other places to keep money

A regular savings account earns interest, but usually not as much as other accounts. A money market account often pays higher interest but may require a larger minimum balance. A certificate of deposit (CD) locks your money away for a set period — three months, one year, five years — and pays a higher rate in exchange for that commitment. If you withdraw the money early, you pay a penalty.

A checking account typically earns little to no interest, even though you keep money there. That is because checking accounts are designed for frequent withdrawals and payments, not for saving. If your goal is to watch your money grow, a savings account, money market account, or CD will do that faster than a checking account.

High-yield savings accounts are savings accounts that pay much higher interest rates than standard ones. They are offered by online banks and some credit unions. The trade-off is that you usually cannot walk into a physical branch to deposit or withdraw cash — you do everything online or by phone. For many people, that is not a problem, and the higher interest rate makes it worth it.

How compound interest works over time

Compound interest is the reason your money grows faster the longer it sits. Here is a straightforward example: if you put $1,000 in an account earning 5% per year, you earn $50 in the first year, giving you $1,050. In the second year, you earn 5% on $1,050, which is $52.50, giving you $1,102.50. You earned $2.50 more in year two than year one, even though you did not add any new money. That extra $2.50 came from earning interest on the interest.

Over many years, compound interest adds up significantly. The longer your money stays in the account, the more time compound interest has to work. This is why starting to save early, even with small amounts, can result in much more money later. A teenager who puts $500 in a savings account and leaves it untouched for fifty years will have far more than someone who puts $500 in at age fifty and leaves it for ten years, assuming the same interest rate.

The frequency of compounding also matters. Some accounts compound interest daily, some weekly, and some monthly. Daily compounding means you earn interest on your interest more often, so your money grows slightly faster. Most savings accounts compound daily, which is good for you.

What happens to interest when rates are very low

When interest rates are low — below 1% per year — your money still grows, but very slowly. A $5,000 balance earning 0.5% per year would earn only $25 over twelve months. That is real money, but it is not much. During periods of low rates, some people move their money to CDs or other investments hoping for better returns, while others keep it in a savings account for safety and straightforward access, even if the growth is slow.

Low interest rates are often set by the Federal Reserve during economic downturns, when the goal is to encourage people and businesses to borrow and spend rather than save. High interest rates are often set during periods of high inflation, when the goal is to encourage saving and discourage spending. Understanding this context helps explain why the interest you earn changes over time.

How to find a savings account with a better interest rate

Start by checking what your current bank is offering. You can usually find the interest rate on the bank's website or by calling. Then compare that to rates at other banks. Online banks almost always offer higher rates than large national banks, because they have lower costs — no physical branches to maintain. Credit unions, which are member-owned financial institutions, often offer competitive rates too.

When comparing, look at the Annual Percentage Yield, or APY, which shows the total interest you will earn in a year including compound interest. A bank advertising a 4.5% APY will grow your money faster than one advertising 3.5% APY. The difference might seem small, but over years it adds up.

Also check whether the account has a minimum balance requirement. Some high-yield accounts require you to keep at least $1,000 or $2,500 in the account to earn the advertised rate. If your balance falls below that, the rate drops. Make sure you can meet the requirement before opening the account.

Tax on interest earned in a savings account

The interest you earn is considered income by the IRS, and you have to report it on your tax return. If you earn more than $10 in interest in a year, your bank will send you a form called a 1099-INT reporting how much you earned. You use that form when filing your taxes. Even if you earn less than $10, you should still report the interest on your return.

The amount of tax you owe on the interest depends on your overall income and tax bracket. If you are in a low tax bracket, you might owe very little or nothing. If you are in a higher bracket, you will owe more. This is one reason why the actual benefit of interest earned on small balances can be modest — some of it goes to taxes.

Frequently Asked Questions

How often does interest get added to my account?

Most banks compound and add interest daily, meaning they calculate what you owe every day and add it to your balance. Some add it monthly or quarterly. Daily compounding is better for you because your money grows slightly faster. You can ask your bank how often they compound, or check the account agreement.

Can I lose money in a savings account?

No. Your balance will never go down due to interest rates or market changes. The worst that can happen is that interest rates fall and you earn very little. Your principal — the money you deposited — is protected by FDIC insurance up to $250,000 per account at most banks.

Is a savings account a good place to keep money I might need soon?

Yes. A savings account is designed for money you want to keep safe and accessible. You can withdraw it anytime without penalty, unlike a CD. The interest is a bonus, not the main reason to use it. For money you will need within a few months, a savings account is better than a CD because you will not be charged for early withdrawal.

What is the difference between APR and APY?

APR is the annual percentage rate without accounting for compound interest. APY is the annual percentage yield and includes compound interest. APY is always equal to or higher than APR. When comparing savings accounts, use APY because it shows the real amount you will earn.

Should I move my money if another bank offers a higher rate?

It depends on how much money you have and how much higher the rate is. If you have $10,000 and can earn an extra 1% per year, that is $100 more annually. If moving takes an hour of your time, that might be worth it. If you have $500, the extra earnings might be only $5 per year, which may not be worth the effort. Calculate the difference and decide if it matters to you.