CD Calculator
Calculate how much your certificate of deposit will earn based on your deposit amount, APY, term length, and compounding frequency. Compare multiple CDs side-by-side and estimate early withdrawal penalties.
Growth Over Time
Early Withdrawal Penalty
CD Option A
CD Option B
CD Option C
Comparison Results
How CD Interest Compounds
A certificate of deposit (CD) grows your money through compound interest. The formula A = P × (1 + r/n)n×t determines your final balance, where P is your initial deposit, r is the annual interest rate, n is the number of compounding periods per year, and t is the term in years. Compounding frequency matters because more frequent compounding means interest earns interest sooner.
For example, a $10,000 CD at 4.50% APY compounded daily will earn slightly more than the same CD compounded annually. The difference is small for short terms but becomes more significant over longer periods. Daily compounding is most common at online banks, while traditional banks may compound monthly or quarterly.
CD Interest Formula
A = P × (1 + r/n)n×t
P = Principal (deposit), r = Annual rate, n = Compounding periods/year, t = Term in years
Interest Earned = A - P
Effective Rate = (A/P)1/t - 1
Choosing the Right CD Term
CD terms typically range from 3 months to 5 years. Shorter terms (3-12 months) offer more flexibility and are ideal when you expect interest rates to rise or need access to funds soon. Longer terms (2-5 years) generally offer higher APYs and work best when you want to lock in a favorable rate for an extended period.
Consider your financial goals when choosing a term. Emergency fund reserves work well in short-term CDs or a CD ladder. Saving for a down payment in two years might suit a 24-month CD. Retirement savings you will not need for years could benefit from the higher rates of 4 or 5-year CDs. The key is matching the CD maturity date to when you will actually need the money.
CD Calculator for Different Goals
This CD calculator helps you plan for various savings scenarios. Use the single calculator to quickly see how much a specific CD will earn, or switch to comparison mode to evaluate offers from different banks side by side. The early withdrawal penalty section helps you understand the cost of breaking a CD early, so you can make informed decisions about liquidity versus yield.
Financial advisors often recommend spreading deposits across multiple CDs with different terms, a strategy called CD laddering. Our CD Ladder Calculator is purpose-built for that strategy. Together, these tools give you a complete picture of CD investing options.
Understanding Early Withdrawal Penalties
Most banks charge a penalty if you withdraw funds from a CD before the maturity date. The penalty is typically expressed as a number of months of interest, commonly 3 months for short-term CDs and 6-12 months for longer terms. Some banks may charge penalties that exceed the interest earned, meaning you could lose part of your principal.
Before opening a CD, always check the early withdrawal penalty terms. Some online banks have started offering no-penalty CDs that let you withdraw without fees, though these typically offer slightly lower APYs. Use the penalty calculator section above to estimate your costs if you need to withdraw early, so you can weigh the risk against the higher yield.