How to Use
- 1.
Enter the initial deposit, quoted APY, CD term, compounding frequency, and start date.
- 2.
Add your estimated tax rate or early-withdrawal penalty assumptions if needed.
- 3.
Compare the CD with high-yield savings and money market APYs that you have verified.
- 4.
Edit the sample offer names, terms, and rates to compare bank quotes side by side.
- 5.
Review the estimated maturity date, interest, after-tax value, early payout, ladder schedule, and growth chart.
- 6.
Confirm all final calculations and contract rules with the bank before making a deposit.
Features
CD initial deposit, APY, term, and start date inputs
Daily, monthly, quarterly, and annual compounding options
Estimated interest earned, maturity value, and maturity date
Side-by-side comparison for three editable CD offers
CD versus high-yield savings and money market estimate
Early-withdrawal penalty and payout estimate
Staggered CD ladder with equal deposit allocations
Optional estimated tax on interest and monthly top-ups
Same-rate reinvestment projection and balance chart
Currency selection, copy, print, and text export
Frequently Asked Questions
How do I calculate CD interest and maturity value?+
Enter the deposit, APY, term, and compounding frequency. The calculator converts the effective APY to an equivalent compounding-period rate and estimates the balance at maturity.
Does APY already include compounding?+
Yes. APY represents an effective annual yield that reflects compounding. This calculator treats the entered rate as APY and converts it to an equivalent selected interval to avoid applying compounding twice.
Can I compare CD rates from different banks?+
Yes. Enter up to three quoted rates and terms in the offer table. Results are hypothetical estimates and the tool does not fetch or verify current bank rates.
Is a CD better than a high-yield savings account?+
It depends on the rates, term, access needs, fees, and early withdrawal rules. Enter current verified rates to compare estimated balances over the same time period.
How is an early CD withdrawal penalty estimated?+
The tool models a penalty as the number of months of interest you enter. Actual bank formulas and contract terms can differ, so check the CD agreement for the exact charge.
What is a CD ladder?+
A CD ladder splits a deposit among CDs with different maturity dates. This calculator illustrates equal portions with staggered terms; future renewal rates and liquidity are not guaranteed.
Does this calculator estimate taxes on CD interest?+
It can apply a simple tax percentage to modeled interest. Tax timing, reporting, deductions, and rates depend on your location and situation; the estimate is not tax advice.
Are CD rates updated automatically?+
No. Enter APYs from offers you have checked with a bank or credit union. The calculator does not use live rates or recommend a financial institution.
Is the maturity value guaranteed?+
No. This is an estimate based on the APY, term, compounding, and deposits entered. Confirm the bank's disclosure, posting rules, and maturity instructions.
About this tool
Free CD Calculator
Use this CD calculator to estimate the interest and maturity value of a certificate of deposit. Enter your initial deposit, quoted annual percentage yield (APY), CD term, compounding frequency, start date, and optional tax or monthly top-up assumptions. Compare sample offers, high-yield savings, and money market account rates using your own current quotes. ## How CD interest is estimated APY is an effective annual yield that already reflects compounding. To avoid counting compounding twice, this calculator converts the APY into an equivalent rate for the selected daily, monthly, quarterly, or annual interval. The maturity estimate compounds deposits over the selected term. Actual institution calculations may use different day-count conventions, posting dates, minimum balances, or rounding rules; use your account disclosure for an exact value. ## Compare CD rates, terms, and savings accounts Enter up to three hypothetical bank offers with their quoted term and APY to compare estimated maturity values. The comparison table also lets you compare a CD with high-yield savings and money market rates over the same time horizon. It uses only the rates you enter: there is no live bank-rate feed, bank ranking, or guarantee that a listed rate is available to you. ## Estimate an early withdrawal penalty Enter a penalty in months of interest to estimate a possible early-withdrawal charge and payout if you close the CD before maturity. Banks set their own penalty rules, and some contracts may deduct more than the interest earned or restrict withdrawals. The penalty-offset figure is a simple interest estimate, not a bank's break-even quote. ## CD ladder planning The CD ladder estimate divides your deposit into equal portions with staggered maturity terms. A ladder can help illustrate how deposit amounts and maturity dates may be spread out, but reinvestment rates and liquidity depend on future offers and bank terms. Review the schedule with your own maturity dates before opening accounts. ## Taxes and reinvestment assumptions The optional tax rate estimates tax on modeled interest only; actual tax timing, reporting, deductions, tax brackets, and local rules vary. The reinvestment projection assumes the same APY is available at each renewal, which is not guaranteed. Optional additional deposits are included only as a hypothetical feature because many CDs do not accept top-ups. This CD calculator is for educational planning only and is not a bank quote, tax advice, or investment advice. Verify APY, compounding, maturity instructions, early withdrawal penalties, deposit insurance, and tax treatment with the financial institution and a qualified tax professional.
Planning what to save before opening a CD? Set a target and timeline with the Savings Goal Calculator, then compare a longer-term retirement projection using the Retirement Savings Calculator. These tools use separate assumptions and do not recommend a financial product.