Estimate the value of a certificate of deposit at maturity, after tax and including an early-withdrawal penalty estimate.
| Date | Interest earned | Balance |
|---|---|---|
| Oct 2027 | $450.00 | $10,450.00 |
Please do not make financial decisions based on these results.
What is the CD Calculator?
A CD (certificate of deposit) locks your money for a fixed term at a fixed rate. The calculator shows the value at maturity, interest after tax and the cost of withdrawing early.
Where the CD Calculator fits
Estimate the value of a certificate of deposit at maturity, after tax and including an early-withdrawal penalty estimate. The main figure it returns is the Value at maturity, worked out from the values you enter.
It belongs with the other investment tools. If you are comparing options or checking a result from another angle, try the Time Value of Money Calculator, FD Calculator — Fixed Deposit Calculator or the Rate of Return Calculator.
How to use the CD Calculator
- Fill in the fields. You will need Deposit ($), Rate (% per year), CD term: years, Early-withdrawal penalty (months of interest). Use a rate of return you consider realistic; small changes compound into large differences. Fields marked optional can stay at zero.
- Choose your options. The rate is a…, Compounding (for interest rate) change how the result is worked out, and the form updates to match your choice.
- Read the result. The highlighted box gives the Value at maturity, and the cards below show Interest earned, APY, Tax on interest. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the CD Calculator using the default values shown in the calculator above:
Inputs
| Deposit ($) | 10,000 |
|---|---|
| Rate (% per year) | 4.5 |
| The rate is a… | APY (already includes compounding) |
| CD term: years | 1 |
| Compounding (for interest rate) | Daily |
| Early-withdrawal penalty (months of interest) | 3 |
Results
| Value at maturity | $10,450.00 |
|---|---|
| Interest earned | $450.00 |
| APY | 4.5% |
| Tax on interest | $0.00 |
| Interest after tax | $450.00 |
| Balance after tax | $10,450.00 |
| Early-withdrawal penalty (est.) | $110.24 |
With these inputs the calculator returns Value at maturity: $10,450.00. Change any value in the calculator to see how the result moves.
What the results tell you
The results panel of the CD Calculator reports Value at maturity, interest earned, apy, tax on interest, interest after tax, balance after tax and early-withdrawal penalty (est.). Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Tips for better results
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. Investment returns are not guaranteed. The result shows what the numbers you enter would produce, not what the market will do. It is for information, not financial, tax or legal advice.
Frequently asked questions
Is CD interest taxable?
Yes. It is taxed as ordinary income in the year it is credited.
Are CDs insured?
CDs at FDIC-insured banks and NCUA-insured credit unions are covered up to $250,000 per depositor, per institution, per ownership category.
What rate of return should I assume?
There is no guaranteed rate. Test a range of conservative and optimistic rates, and remember that fees and inflation reduce your real return.
How often does interest compound?
You choose it in the compounding field of this calculator: daily, weekly, monthly, quarterly, semiannual, annual or continuous.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
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