What Is a Certificate of Deposit (CD)? How CDs Work and When to Use Them

A certificate of deposit is one of the safest investments you can make — your principal is guaranteed and FDIC-insured up to $250,000. In return, you agree to lock up your money for a set period. If you have cash you won't need for 6–24 months, CDs can earn more than a standard savings account with zero risk.

How CDs Work

You deposit a lump sum with a bank for a fixed term — typically 3 months to 5 years. The bank pays you a fixed interest rate for that term. When the term ends (the 'maturity date'), you receive your original deposit plus all accumulated interest. Unlike a savings account, you generally can't add more money mid-term or withdraw early without a penalty.

CD Rates: What to Expect

CD rates vary significantly between institutions. Big banks like Chase and Bank of America often pay 0.01–0.5% — worse than inflation. Online banks and credit unions routinely offer 4.5–5.5% on 12-month CDs. Always compare rates at Bankrate or NerdWallet before opening a CD. The difference between 0.5% and 5% on $10,000 over a year is $450.

Early Withdrawal Penalties

Most CDs charge a penalty for withdrawing before the maturity date — typically 90–180 days of interest for short-term CDs and 6–12 months of interest for longer terms. If you withdraw a 12-month CD early after 3 months, you might pay back all the interest you earned plus some. This is why CDs are only appropriate for money you genuinely won't need.

CD Laddering: Getting Flexibility and Higher Rates

Instead of putting all your money in one CD, spread it across multiple CDs with different maturity dates. For example: put 25% in a 3-month CD, 25% in a 6-month CD, 25% in a 12-month CD, and 25% in a 24-month CD. As each CD matures, reinvest in a new longer-term CD. You get the higher rates of longer terms while maintaining regular access to portions of your money.

CD vs High-Yield Savings Account: Which Is Better?

• Use a CD if: you have a specific savings goal with a fixed timeline, rates are declining (locking in today's rate), and you won't need the money before maturity
• Use a HYSA if: you need flexibility to withdraw anytime, you're building an emergency fund, or you might need the money on short notice
• Rate comparison: in 2024, top HYSAs paid 4.5–5% — often matching CDs with more flexibility

Are CDs FDIC Insured?

Yes. CDs at FDIC-insured banks are protected up to $250,000 per depositor, per institution, per ownership category. Credit union CDs are covered by NCUA insurance with the same limits. Your principal is completely safe as long as you stay within these limits and the institution is federally insured.