Where your money earns interest

Interest on your money comes from putting it into a financial product that pays you a return. The most common places are savings accounts, money market accounts, certificates of deposit (CDs), and bonds. Banks and credit unions pay interest on savings accounts and CDs. The U.S. Treasury issues bonds directly. Each option has different interest rates, different rules about when you can withdraw your money, and different levels of safety.

The amount of interest you earn depends on three things: how much money you deposit, what interest rate the product offers, and how long you leave the money there. A higher rate means more money in your pocket. A longer time frame means more compounding — that is, earning interest on your interest. The trade-off is usually that higher rates come with restrictions, like locking your money away for a set period or keeping a minimum balance.

Key Takeaways

  • Savings accounts and money market accounts let you withdraw money anytime, but typically pay lower interest rates than CDs or bonds.
  • Certificates of deposit (CDs) lock your money for a set term — usually three months to five years — and pay a fixed rate that is higher than savings accounts.
  • Treasury bonds, notes, and bills are issued by the U.S. government and are considered the safest option, though rates vary by how long you lock in your money.
  • Interest compounds over time, meaning you earn returns on your previous returns, so leaving money untouched longer increases your total earnings.
  • Your choice depends on when you need the money: if soon, use a savings account; if not for years, a CD or bond usually pays more.

Savings accounts and money market accounts

A savings account is the simplest way to earn interest. You deposit money, the bank holds it, and they pay you a percentage of your balance each month or quarter. You can withdraw whenever you want with no penalty. The downside is that interest rates on savings accounts are typically low — often less than 1 percent annually, though this varies by bank and by the current economic environment.

A money market account is a hybrid between a savings account and a CD. It usually pays a higher rate than a regular savings account, but it may require a larger minimum deposit (sometimes $2,500 or more) and limits how many times per month you can withdraw. Some money market accounts also come with a debit card or checkbook, giving you more access to your cash than a CD would.

Both are insured by the Federal Deposit Insurance Corporation (FDIC) if held at a bank, or by the National Credit Union Administration (NCUA) if held at a credit union. This means if the bank fails, your money up to $250,000 is protected. This safety makes them good for emergency funds or money you know you will need within a year.

Certificates of deposit (CDs)

A certificate of deposit is a contract between you and a bank. You agree to leave your money there for a fixed period — called the term — which can be three months, six months, one year, three years, five years, or longer. In return, the bank pays you a higher interest rate than a savings account. The rate is locked in and does not change during the term.

When the term ends, the CD matures. You get your original deposit plus all the interest earned. At that point you can withdraw the money, open a new CD, or let the bank automatically roll it into a new CD at the current rate. If you withdraw money before the term ends, you pay an early withdrawal penalty, which is usually a few months' worth of interest. This penalty is why CDs work best for money you will not need for the stated term.

CD rates are higher than savings account rates because the bank knows exactly how long it has your money and can lend it out with confidence. Rates vary by bank and by term length. Longer terms usually pay more than shorter ones, though this is not always true. You can shop CD rates across different banks — some online banks offer rates significantly higher than brick-and-mortar banks.

Treasury bonds, notes, and bills

The U.S. Treasury issues three types of debt securities that pay interest: Treasury bills (terms of four weeks to one year), Treasury notes (terms of two to ten years), and Treasury bonds (terms of 20 or 30 years). You lend money to the federal government, and they pay you interest. These are considered the safest investments because they are backed by the U.S. government.

You buy Treasuries directly from the U.S. Treasury through TreasuryDirect.gov, or through a bank or brokerage firm. The interest rate is set by auction — the Treasury announces how much it is borrowing and investors bid on what rate they will accept. Rates change based on economic conditions and how much demand there is. Longer-term Treasuries typically pay higher rates than shorter-term ones.

Unlike a CD, you can sell a Treasury before it matures if you need the money, but the price you get depends on current interest rates. If rates have risen since you bought it, you will get less than you paid. If rates have fallen, you will get more. This price risk is why Treasuries are best for money you plan to hold until maturity, or for investors comfortable with market fluctuations.

How interest compounds and grows your money

Compounding means earning interest on your interest. If you deposit $1,000 in a CD that pays 4 percent annually, after one year you have $1,040. If you leave it for a second year, you earn 4 percent on the full $1,040, not just the original $1,000. The longer money sits, the more compounding works in your favor. This is why leaving money untouched for years can roughly double it, even at modest interest rates.

Some accounts compound daily, some monthly, and some quarterly. Daily compounding means your interest is calculated and added to your balance every day, so you earn interest on that interest sooner. The difference is small on small balances but meaningful on larger ones or over many years. When comparing products, look for the annual percentage yield (APY), which accounts for compounding and shows the true annual return.

Comparing interest rates across products

Interest rates change constantly and vary widely by bank, by product, and by term. A savings account at one bank might pay 0.01 percent while an online bank pays 4.5 percent. A one-year CD might pay 4 percent while a five-year CD pays 4.8 percent. There is no single "best" rate — you have to shop.

Websites like Bankrate, DepositAccounts, and the Federal Reserve's own rate tracker show current rates across banks. When comparing, make sure you are looking at the APY, not just the interest rate, and check the minimum deposit requirement and any fees. Also verify that the bank is FDIC-insured if safety is your priority. For Treasuries, you can see all current rates and terms on TreasuryDirect.gov.

The trade-off is always between rate and access. A savings account pays almost nothing but you can withdraw anytime. A five-year CD pays more but your money is locked away. A Treasury bond pays a government-backed rate but you cannot access it without selling at a potential loss. Your choice depends on when you need the money and how much risk you are willing to take.

Frequently Asked Questions

How much interest will I earn on $10,000?

It depends on the product and the rate. At a savings account paying 4.5 percent APY, you would earn about $450 in one year. At a CD paying 5 percent, you would earn $500. At a Treasury bill paying 5.3 percent, you would earn about $530. Rates change daily, so check current rates at your bank or on TreasuryDirect.gov for exact numbers.

Is my money safe in a CD or savings account?

Yes, if the bank is FDIC-insured. Your deposits up to $250,000 are protected even if the bank fails. Credit unions offer the same protection through the NCUA. Treasury securities are backed by the U.S. government, so they are considered the safest option available.

What happens if I need my CD money before it matures?

You can withdraw it, but you will pay an early withdrawal penalty. The penalty is usually a few months of interest — sometimes three months, sometimes six, depending on the bank and the CD term. For example, if your CD pays $50 in interest per month and the penalty is three months, you lose $150. Check the CD terms before you buy to know the exact penalty.

Should I buy a short-term or long-term CD?

If you might need the money within a year or two, choose a shorter term to avoid penalties. If you are certain you will not touch it for five years, a longer-term CD usually pays a higher rate and lets your money compound longer. Some people use a CD ladder — buying multiple CDs with different maturity dates — so money becomes available at regular intervals.

Can I lose money in a Treasury or CD?

With a CD, no — you get back your full deposit plus interest if you hold it to maturity. With a Treasury, you cannot lose money if you hold it to maturity either, but if you sell before maturity and interest rates have risen, the sale price will be lower than what you paid. This is why Treasuries are best held to maturity unless you are comfortable with that risk.