1
Add the Deposit
Enter the amount placed into the certificate of deposit when it is opened.
Fixed-Term Deposit Planning
Certificate of Deposit Calculator
Estimate how a certificate of deposit may grow from opening deposit to maturity. Compare interest earned, effective APY, after-tax returns and an optional early-withdrawal estimate.
APY or nominal rate
Flexible CD terms
Tax and penalty estimates
Calculate Your CD Growth
Use the rate format shown by your bank or financial institution.
Certificate of Deposit Summary
Projection calculated
Maturity value
$0.00
Total interest earned
$0.00
Effective APY
0.000%
After-tax maturity value
$0.00
Average monthly interest
$0.00
Estimated tax on interest
$0.00
Estimated penalty
$0.00
Balance after penalty
$0.00
Interest share of maturity value
0.0%
Enter your CD details to estimate the maturity value.
About This Calculator
What Is a Certificate of Deposit Calculator?
A certificate of deposit calculator estimates how much a fixed-term deposit may be worth when the agreed term ends.
A certificate of deposit, commonly called a CD, generally pays a fixed rate when money remains deposited for a specified period. This calculator combines the opening deposit, annual rate, term and interest treatment to estimate the balance available at maturity.
Banks often advertise CD returns using APY. APY already reflects the effect of compounding over one year. When a nominal annual rate is entered instead, the selected compounding frequency determines how often interest is calculated and added.
The optional tax and early-withdrawal fields provide planning estimates only. Actual tax treatment and CD penalties depend on the institution, account agreement and local rules.
Compound CD Growth
When interest remains in the account, the balance can earn interest on both the original deposit and prior interest.
A = P(1 + r ÷ n)nt
Simple Calculation Process
How the CD Calculator Works
Enter the details shown by the financial institution and review the projected value at the end of the term.
2
Enter the Quoted Rate
Choose APY or nominal rate so the calculator interprets the percentage correctly.
3
Select Term and Compounding
Add the CD term and select how often nominal interest compounds, when applicable.
4
Review Maturity Results
Compare maturity value, interest, APY, tax estimate and optional penalty figures.
Better CD Comparisons
Important Factors When Comparing CDs
Compare APY, Not Only Rate
APY reflects compounding and is usually more useful when comparing certificates with different interest-crediting schedules.
Review Withdrawal Rules
A higher rate may be less attractive when the account has a long lock period or a substantial early-withdrawal penalty.
Match the Term to Your Goal
Select a term that keeps the money available when needed rather than choosing a longer term only for a slightly higher yield.
Frequently Asked Questions
Certificate of Deposit Calculator FAQs
APY reflects the annual effect of compounding. A nominal interest rate does not fully include that effect until the compounding frequency is applied.
Withdrawn interest normally does not earn additional interest. The calculator therefore estimates simple interest when that option is selected.
The optional estimate multiplies the deposit by the entered annual rate and the selected number of penalty months. Actual bank calculations may differ.
No. Standard certificates of deposit commonly use one opening deposit and may not permit additional contributions during the term.
Tax handling varies. The optional tax field provides only a general estimate of tax on interest and does not determine actual tax liability.
The calculator provides a mathematical estimate. The actual maturity value depends on the institution's agreement, rate, compounding rules, fees and withdrawal activity.
Note: This calculator provides general estimates and
does not represent a bank offer, tax advice or a guarantee of returns.
Review the institution's official CD disclosure before depositing money.