A certificate of deposit (CD) is a savings account that holds a fixed amount of money for a fixed period of time — and pays you a guaranteed interest rate in return. CDs are offered by banks and credit unions and are one of the safest ways to grow your money.
How Does a CD Work?
When you open a CD, you agree to leave your money deposited for a set term. Terms typically range from three months to five years. In exchange, the bank pays you a higher interest rate than a standard savings account. When the term ends (called the maturity date), you get your original deposit back plus the interest earned.
The catch: if you withdraw money early, you pay an early withdrawal penalty — usually a few months of interest. This makes CDs best for money you know you won’t need during the term.
CD vs. High-Yield Savings Account
Both CDs and high-yield savings accounts (HYSAs) offer better rates than traditional savings accounts. The key difference:
- CDs lock in a fixed rate for the full term. Great when rates are high and you expect them to drop.
- HYSAs are flexible — you can deposit and withdraw anytime. Rates fluctuate with the market.
If you’re unsure which to choose, compare current rates at your bank. Right now, many online banks offer CDs yielding 4% to 5% APY on 12-month terms.
Types of CDs
Traditional CDs
Standard fixed-rate, fixed-term accounts. Most common type. Early withdrawal penalties apply.
No-Penalty CDs
Allow you to withdraw funds without penalty after a short holding period (usually 6 to 7 days). Rates are slightly lower than traditional CDs but offer more flexibility.
Bump-Up CDs
Let you request a rate increase once during the term if rates rise. Useful when you think interest rates will go higher.
Jumbo CDs
Require a minimum deposit of $100,000. Often (but not always) offer slightly higher rates. Standard FDIC insurance covers up to $250,000 per depositor.
CD Laddering
A strategy where you split your money across CDs with staggered terms — for example, a 1-year, 2-year, and 3-year CD. As each one matures, you reinvest it. This gives you regular access to some cash while still earning higher long-term rates.
Are CDs Safe?
Yes. CDs at FDIC-insured banks are protected up to $250,000 per depositor, per bank. Credit union CDs are insured by NCUA up to the same limit. Your principal is not at risk as long as you stay within insurance limits.
How CD Rates Are Set
CD rates generally track the federal funds rate set by the Federal Reserve. When the Fed raises rates, CD rates rise. When the Fed cuts rates, CD rates fall. This is why locking in a long-term CD when rates are high can be a smart move.
How to Open a CD
- Compare rates across online banks, credit unions, and traditional banks. Online banks typically offer the highest rates.
- Choose a term length that matches when you’ll need the money.
- Fund the account with your deposit minimum (varies by bank — some start at $500, others at $1,000).
- Set a reminder for the maturity date so you can decide whether to renew or move the funds.
What Happens When a CD Matures?
At maturity, most banks give you a short grace period (usually 7 to 10 days) to withdraw or reinvest. If you do nothing, the CD typically auto-renews at the current rate for the same term — which may be higher or lower than your original rate. Always pay attention to maturity notices.
Who Should Use a CD?
CDs are a good fit if you:
- Have a specific savings goal with a known timeline (vacation, down payment, tuition)
- Want a guaranteed return with no market risk
- Are worried about spending money in a regular savings account
CDs are not ideal if you need access to your money at any time, or if you’re trying to grow wealth over decades — for that, investing in a low-cost index fund historically offers much higher returns.
Bottom Line
A certificate of deposit is a safe, predictable way to earn more than a standard savings account — as long as you’re willing to leave your money alone for the term. Use CDs for short-to-medium-term goals and consider laddering if you want to balance liquidity with higher rates.