What is a Certificate of Deposit (CD)?
A CD is a time deposit where you lock in a fixed amount of money for a fixed term in exchange for a guaranteed interest rate — typically higher than regular savings accounts. CDs are FDIC-insured up to $250,000 per depositor per institution.
How CD Interest is Calculated
A = P × (1 + r/n)^(nt)
Where:
A = final balance
P = initial deposit
r = annual rate (decimal)
n = compounding periods per year
t = time in yearsCD Ladder Strategy
Instead of putting all money in one CD, a CD ladder divides your savings across multiple CDs with staggered maturities (e.g., 6-month, 1-year, 2-year, 3-year). When each CD matures, you reinvest at the longest term. Benefits: regular access to funds, higher average rates, and protection against rate changes.
Early Withdrawal Penalties
Most CDs charge an early withdrawal penalty — typically 3–6 months of interest for short-term CDs and 6–12 months for longer terms. Factor this in if there is any chance you will need the funds before maturity. Some online banks offer "no-penalty CDs" at slightly lower rates.
Frequently Asked Questions
A CD is a savings product where you deposit a fixed amount for a fixed term (1 month to 10 years) in exchange for a guaranteed interest rate. CDs typically offer higher rates than regular savings accounts because you agree not to withdraw the money early. They are FDIC insured up to $250,000.
In 2026, competitive CD rates range from 4.0%–5.5% APY for 6-month to 2-year terms. Online banks and credit unions typically offer the highest rates. Longer terms do not always mean higher rates — compare the entire yield curve at your bank before committing.
Formula: A = P(1 + r/n)^(nt). Where P = principal, r = annual rate (decimal), n = compounding periods per year, t = time in years. Daily compounding earns slightly more than monthly, which earns more than quarterly, which earns more than annual. The difference is small but compounds over long terms.
Most CDs charge an early withdrawal penalty, typically 3–6 months of interest for short-term CDs (under 1 year) and 6–12 months of interest for longer terms. Some online banks offer no-penalty CDs that allow early withdrawal, but at slightly lower rates.
APR (Annual Percentage Rate) is the stated rate without compounding. APY (Annual Percentage Yield) includes the effect of compounding and reflects what you actually earn. Always compare CDs using APY — it is the true return. A CD with 5.00% APR compounded daily has an APY of 5.127%.
A CD ladder divides your money across multiple CDs with staggered maturities (e.g., 6-month, 1-year, 2-year, 3-year, 5-year). Benefits: access to some funds regularly without penalties, protection against rate changes, and often better average rates than putting all money in one term. Ideal for emergency fund parking or fixed income allocation.
CDs are worth it if you will not need the money until maturity. They typically offer 0.25–1.0% higher rates than HYSAs in exchange for locking up funds. HYSAs are better for emergency funds (liquidity needed). CDs are better for money you will not need for a defined period.
At maturity, you typically have a 7–10 day grace period to decide: 1) Withdraw principal + interest, 2) Roll over to a new CD at the current rate (auto-renew), or 3) Transfer to another account. Set a calendar reminder — many banks auto-renew CDs at whatever rate is current, which may be lower than when you opened.