Cash investments are places to park money you want to grow, but they trade higher returns for safety and access

Cash investments are accounts and products designed to hold money safely while earning interest. Unlike stocks or bonds, they don't fluctuate in value day-to-day. The trade-off is that they typically earn less over time — but you can usually withdraw your money without penalty, and your principal is protected. The right choice depends on when you'll need the money and how much interest rate matters to you.

The most common cash investments are savings accounts, money market accounts, certificates of deposit (CDs), and Treasury bills. Each one has different rules about how long you lock up your money, what interest rate you get, and how quickly you can access it. The longer you're willing to leave money untouched, the higher the rate you'll usually earn.

Key Takeaways

  • High-yield savings accounts currently pay 4% to 5% annual interest and let you withdraw money anytime without penalty.
  • Money market accounts work like savings accounts but often pay slightly higher rates if you keep a larger balance.
  • Certificates of deposit (CDs) lock your money away for a set term — typically three months to five years — and pay higher rates the longer you commit.
  • Treasury bills, notes, and bonds are loans to the federal government and are backed by the U.S. government, making them extremely safe.
  • The interest rate you earn varies by bank and changes weekly, so comparing rates across institutions matters.

High-yield savings accounts: flexible money with competitive rates

A high-yield savings account is a regular savings account that pays significantly more interest than a traditional bank savings account. Most banks offer rates between 4% and 5% annually, though this changes weekly based on Federal Reserve decisions. You can deposit and withdraw money anytime without penalty, and your money is insured by the FDIC up to $250,000 per account owner per bank.

The catch is that rates are variable — they can go up or down. When you open the account, you lock in whatever rate the bank is offering that day, but the bank can lower it later. Some online banks (like Marcus, Ally, or American Express Bank) have historically offered higher rates than brick-and-mortar banks, but you access your money online or by phone rather than at a branch.

High-yield savings accounts work best for money you might need within the next year or two — an emergency fund, a down payment you're saving for, or cash you're holding while deciding what to do with it. The interest compounds daily or monthly, so your money grows even while sitting there.

Money market accounts: a middle ground between savings and checking

A money market account combines features of a savings account and a checking account. It typically pays interest (often slightly higher than a regular savings account, sometimes competitive with high-yield savings), and it usually comes with a debit card or checkbook so you can access your money. Like savings accounts, money market accounts are FDIC-insured up to $250,000.

The trade-off is that banks often require a higher minimum balance to open one — sometimes $2,500 or more — and they may limit how many withdrawals you can make per month. If you exceed the withdrawal limit, you may face a fee. Interest rates are also variable, just like savings accounts.

Money market accounts make sense if you want the flexibility of a checking account but also want to earn interest on a larger balance you're holding. They're less common now that high-yield savings accounts have become widely available, but some people prefer having check-writing ability built in.

Certificates of deposit: higher rates in exchange for locking up your money

A certificate of deposit (CD) is a contract between you and a bank. You give the bank a sum of money for a fixed period — called the term — and the bank pays you a set interest rate for that entire period. Terms typically range from three months to five years, though some banks offer longer or shorter terms. The longer the term, the higher the rate you'll earn.

The key restriction is that you cannot withdraw your money before the term ends without paying a penalty. The penalty is usually a certain number of months' worth of interest — so if you have a one-year CD and withdraw after six months, you might lose six months of interest. Some banks offer "no-penalty CDs" that let you withdraw early without a fee, but they pay lower rates in return.

CDs are FDIC-insured up to $250,000 per term per bank. If you have $500,000 and want to protect it all, you can open two CDs at two different banks. When your CD matures (the term ends), the bank returns your principal plus all the interest you earned. You can then renew it at the current rate, move the money to a savings account, or invest it elsewhere.

CDs work best for money you know you won't need for a specific period — a down payment you're saving for over the next three years, or a lump sum you received and want to grow safely. Because rates are locked in, you also benefit if interest rates fall after you open the CD.

Treasury securities: loans to the federal government with no default risk

Treasury bills, notes, and bonds are debt securities issued by the U.S. Department of the Treasury. When you buy one, you're lending money to the federal government. In return, the government pays you interest and returns your principal at maturity. They are backed by the full faith and credit of the U.S. government, making them the safest investment available.

Treasury bills (T-bills) mature in less than one year — typically 4 weeks, 8 weeks, 13 weeks, or 26 weeks. Treasury notes mature in 2 to 10 years. Treasury bonds mature in 20 or 30 years. The longer the maturity, the higher the interest rate. You can buy Treasuries directly from the government through TreasuryDirect.gov with no fees, or through a bank or brokerage (which may charge a small fee).

One difference from CDs and savings accounts: Treasury prices fluctuate if you sell before maturity. If interest rates rise after you buy, your Treasury is worth less if you try to sell it. But if you hold it to maturity, you get your full principal back regardless of what happened to rates. This makes Treasuries best for money you can commit to for the full term.

Treasuries are taxed differently than savings accounts and CDs. The interest is subject to federal income tax but exempt from state and local income tax. This can make them attractive if you live in a high-tax state.

How to compare rates and choose between options

Interest rates change constantly, so the best account today may not be the best next month. Websites like Bankrate, DepositAccounts, and the Federal Reserve's own rate tracker show current rates across banks. When comparing, look at the annual percentage yield (APY), which includes the effect of compounding.

Create a simple table with your options: the account type, the current rate, the term (if any), when you'll need the money, and any fees or minimum balances. Then ask yourself: How long can this money stay invested? Do I need access to it? Is a slightly higher rate worth giving up flexibility?

For money you might need within six months, a high-yield savings account is usually the best choice because rates are competitive and you have full access. For money you won't touch for one to five years, a CD ladder (opening multiple CDs with different maturity dates) can lock in higher rates while giving you some access to money each year. For money you're holding long-term and want maximum safety, Treasuries are hard to beat.

The role of FDIC insurance and where your money actually sits

The FDIC (Federal Deposit Insurance Corporation) insures deposits at member banks up to $250,000 per depositor per bank. This means if the bank fails, you get your money back up to that limit. Most banks are FDIC-insured, but not all — credit unions use a similar system called NCUA insurance. Always check before opening an account.

When you open a high-yield savings account at an online bank, your money is held at that bank's actual location (which may be different from where you live). The bank uses your deposits to make loans and investments, and pays you interest from the income it earns. You don't own the bank's assets — you own a claim on the bank for the amount you deposited, which is why insurance matters.

CDs and Treasuries work the same way. With a CD, the bank holds your money and pays you interest. With a Treasury, the federal government holds your money and pays you interest. In both cases, your principal is protected by law or insurance.

Frequently Asked Questions

What's 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 — interest earned on interest. For savings accounts and CDs, always compare APY, not APR, because it shows what you'll actually earn.

Can I lose money in a high-yield savings account or CD?

No. Your principal is protected by FDIC insurance, and interest rates don't go negative. The only way to lose money is if you withdraw early from a CD and the penalty exceeds the interest you've earned — which is rare with short-term CDs.

Should I ladder CDs or just buy one long-term CD?

A CD ladder means buying multiple CDs with different maturity dates — for example, one that matures in one year, one in two years, and one in three years. This gives you access to some of your money each year while locking in higher rates on the longer-term CDs. It's useful if you might need the money but want to earn more than a savings account pays.

Do I have to report interest from savings accounts or CDs on my taxes?

Yes. Banks send you a 1099-INT form each January reporting all interest you earned over $10. You report this as income on your tax return. Treasury interest is also taxable federally but exempt from state and local taxes.

What happens if interest rates drop after I buy a CD?

You keep the rate you locked in when you opened the CD. This is one advantage of CDs — if rates fall, you're protected. When the CD matures, you can renew at the new (lower) rate, or move the money elsewhere.