Last updated: March 2026
What Is a Certificate of Deposit (CD)?
A certificate of deposit is a time-locked savings product offered by banks and credit unions. You deposit a fixed amount for a set term — anywhere from 3 months to 5 years or more — and the bank guarantees a fixed interest rate for the entire term. In exchange for not touching your money, you earn a higher rate than a standard savings account.
CDs are one of the safest investments available. They are FDIC-insured up to $250,000 per depositor per institution, meaning your principal and earned interest are fully protected. This makes CDs ideal for money you won't need for a specific period and want to grow with zero risk.
The tradeoff is liquidity. If you withdraw before the CD matures, you'll typically pay an early withdrawal penalty of 3–12 months of interest, depending on the term length. That's why it's important to choose a term that matches when you'll actually need the money.
CD Strategies to Maximize Returns
Build a CD ladder. Instead of putting $20,000 into a single 5-year CD, split it into four $5,000 CDs with 1-year, 2-year, 3-year, and 5-year terms. As each matures, reinvest at the longest term. Within a few years, you'll have a CD maturing every year while earning long-term rates.
Compare online banks. Online banks and credit unions consistently offer 0.50–1.00% higher CD rates than traditional banks. On a $50,000 deposit over 2 years, that's $500–$1,000 in additional interest for simply choosing a different institution.
Watch for rate changes. In a rising rate environment, shorter CDs let you reinvest at higher rates sooner. In a falling rate environment, lock in longer terms to preserve today's higher rates. Use this calculator to model different scenarios.
This calculator provides estimates for educational purposes only. Actual CD rates and terms vary by institution. Early withdrawal penalties may apply. FDIC insurance covers up to $250,000 per depositor per institution.
Frequently Asked Questions
How does a CD work?
A certificate of deposit (CD) is a savings product where you deposit money for a fixed term (3 months to 5+ years) at a guaranteed interest rate. In exchange for locking your money away, the bank pays a higher rate than a regular savings account. If you withdraw early, you typically pay a penalty of several months’ interest.
What is a good CD rate right now?
As of 2024–2025, competitive CD rates range from 4.00% to 5.00% APY for short-term CDs (3–12 months) and 3.25% to 4.25% for longer terms (3–5 years). Online banks and credit unions tend to offer the best rates. Always compare APY, not APR, for an accurate earnings comparison.
Should I choose a CD or a high-yield savings account?
CDs offer a guaranteed rate for the full term, protecting you if rates drop. HYSAs offer flexibility to withdraw anytime but rates can change. Choose a CD if you won’t need the money before maturity and want rate certainty. Choose a HYSA if you need liquidity or expect rates to rise.
What is a CD ladder?
A CD ladder splits your deposit across multiple CDs with staggered maturity dates (e.g., 3-month, 6-month, 1-year, 2-year). As each CD matures, you reinvest at the current rate or use the funds. This strategy balances higher long-term rates with regular access to your money.
What happens when a CD matures?
When your CD reaches the end of its term, you have a grace period (usually 7–10 days) to withdraw the funds, move them to another account, or roll them into a new CD. If you do nothing, most banks automatically renew the CD at the current rate for the same term.