What Are Certificates of Deposit and When Should You Use Them?

Certificates of deposit (CDs) are one of the oldest and most reliable savings vehicles available. They offer guaranteed interest in exchange for locking up your money for a specific period. For the right portion of your savings, CDs can earn higher yields than traditional savings accounts with zero risk. Understanding what CDs are and when to use them helps you optimize your savings strategy.

This post breaks down what certificates of deposit are and when you should use them.

What a Certificate of Deposit Is

A CD is a deposit account with a fixed term and interest rate. You agree to leave your money for a set period (term), and in return the bank pays you a guaranteed interest rate.

Key Characteristics

Fixed term (3 months to 5+ years)

Fixed interest rate locked at opening

FDIC insurance up to $250,000

Penalties for early withdrawal

Yields often higher than savings accounts

Predictable, guaranteed returns

How CDs Work

The Process

Choose a term (e.g., 12 months)

Choose an amount

Deposit the funds

Earn the locked-in rate for the term

At maturity, withdraw funds or roll over to a new CD

Common CD Terms

Standard Options

3 months

6 months

9 months

12 months

18 months

24 months

36 months

48 months

60 months

Longer terms typically pay higher rates (though the yield curve can vary).

CD Pros

Advantages

Higher yields than most savings accounts

Fixed rate locked at opening (predictable)

FDIC insured (zero risk)

No volatility

Simple and easy to understand

CD Cons

Disadvantages

Money is locked up for the term

Early withdrawal penalties

Inflation risk over long terms

Opportunity cost if rates rise

Less flexibility than savings accounts

When CDs Make Sense

Good Use Cases

Money you definitely will not need for a specific period

Larger balances where the yield difference matters

Predictable upcoming expenses (down payment in 2 years)

Retirement income planning

Risk-averse savers

When CDs Do Not Make Sense

Poor Use Cases

Emergency funds (need liquid access)

Money you might need quickly

Aggressive long-term wealth building (stocks usually beat CDs)

Small amounts where yield difference is minimal

Top CD Providers

High-Rate CD Offerings

Marcus by Goldman Sachs (including no-penalty CDs)

Ally Bank

Discover Bank

CIT Bank

Synchrony Bank

Capital One 360

Bread Financial

Compare current rates before opening.

Different Types of CDs

Traditional CD

Fixed term, fixed rate, penalty for early withdrawal

Standard product

No-Penalty CD

Lower rate but can be withdrawn early without penalty (after first 7 days)

Marcus is famous for these

Step-Up or Bump-Up CD

Allows one-time rate increase if rates rise

Usually lower starting rate

Jumbo CD

For balances over $100,000

Slightly higher rates

Brokered CD

Sold through brokerages

Can be sold on secondary market before maturity

More flexible but more complex

Understanding Early Withdrawal Penalties

Most CDs charge penalties for early withdrawal.

Typical Penalty Structures

Short-term CDs (3–12 months): 3 months of interest

Medium-term CDs (1–3 years): 6 months of interest

Long-term CDs (3+ years): 12 months of interest

This is why CDs should only hold money you definitely will not need.

CD Laddering Strategy

A CD ladder spreads your money across multiple CDs with different maturities.

How It Works

Buy a 1-year CD, 2-year CD, 3-year CD, 4-year CD, 5-year CD

As each matures, reinvest in a new 5-year CD

After 5 years, you have a CD maturing every year

Benefits

Liquidity (one CD matures each year)

Higher average yields (longer-term rates)

Diversification of interest rate risk

CDs vs Other Savings Vehicles

CDs vs HYSAs

HYSAs: Variable rate, liquid, no penalty

CDs: Fixed rate, locked, higher yield

Use HYSA for emergency fund. Use CDs for specific time-horizon savings.

CDs vs Treasury Bills

T-bills: Backed by U.S. government, state-tax-exempt

CDs: FDIC insured

For larger balances, T-bills often beat CDs in yield and tax treatment.

CDs vs Bonds

CDs: Simpler, FDIC insured

Bonds: More options, more complexity, potential capital gains

For most retail savers, CDs are simpler.

A Sample CD Strategy

Meet Casey with $50,000 in savings, $25,000 of which is emergency fund.

Casey's Setup

$25,000 in HYSA (emergency fund, liquid)

$5,000 in 1-year CD

$5,000 in 2-year CD

$5,000 in 3-year CD

$5,000 in 4-year CD

$5,000 in 5-year CD

As each CD matures, Casey rolls it into a new 5-year CD. Within 5 years, the ladder is fully built with one CD maturing each year.

Common CD Mistakes

Putting Emergency Fund in CDs

The penalty kills the strategy if you need access.

Choosing the Wrong Term

Lock-up too long for money you might need.

Ignoring Brokered CDs

For large balances, brokered CDs can offer flexibility.

Forgetting Maturity Dates

If you do not withdraw or roll over at maturity, some CDs auto-renew at lower rates.

Overweighting CDs at Young Ages

Younger savers benefit more from stocks than CDs.

When to Use CDs in Retirement

CDs are particularly useful in or near retirement.

Strategies

CD ladders for predictable income

Bond/CD mix for guaranteed income alongside investments

Short-term CDs for cash needs in the next year or two

Conclusion: A Useful Tool for the Right Money

Certificates of deposit are not for every dollar in your savings, but they have a clear role. For money you definitely will not need for a specific period, CDs offer higher guaranteed yields than savings accounts with zero risk. CD ladders combine the higher yields with liquidity, making them especially powerful.

Use CDs intentionally, not for money that needs to stay liquid.

Take action this week. Identify any savings that you are confident you will not need for 1+ years. Compare current CD rates against HYSA rates. If the yield difference is meaningful and you are sure of the time horizon, open a CD for that portion. Your overall yield will improve without sacrificing what you need.

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