CD Calculator

Estimate what a fixed-rate certificate of deposit could earn. Enter the deposit, rate, compounding method, and term to see the estimated maturity balance, interest, and optional after-tax results.

Amounts are shown in your selected display currency. Tax treatment and early-withdrawal rules vary by account and location; use your bank’s terms for an exact estimate.

CD details

Display currency

Formatting only; no currency conversion.

Initial deposit

Annual interest rate (%)

Rate quoted as

Choose the rate format shown by your bank.

Compounding frequency

Used to convert a nominal APR. APY already includes compounding.

Term length — years

Additional months

Estimate tax on positive interest at maturity

Estimated tax rate on interest (%)

A simplified estimate; use the rate relevant to your situation.

Also estimate an early withdrawal

Months held before withdrawal

Early-withdrawal penalty (months of interest)

Banks may calculate penalties differently; check your CD agreement.

Estimated maturity value

Estimated maturity balance—Enter the CD details and calculate.

Balance before tax—

Interest earned—

Estimated tax—

Interest after tax—

Annualized yield after tax—

Total return after tax—

Estimated early-withdrawal proceeds—

Estimated early-withdrawal penalty—

This estimate assumes a fixed rate and reinvests interest until maturity.

CD accumulation schedule

Track the estimated account balance and interest over the term. Partial years use the selected rate convention.

Schedule view

Period	Deposit	Interest for period	Total interest	Ending balance
Calculate to create your accumulation schedule.

How this CD calculator works

A certificate of deposit is a fixed-term deposit that may earn interest at a stated rate. This calculator projects a fixed-rate balance over the term you enter. It can also estimate tax on interest and a possible early-withdrawal penalty.

What is the difference between APY and APR?

APY expresses the annual yield after compounding. A nominal APR is a rate before compounding is included. For an APR quote, this calculator applies interest at the compounding frequency you select. For APY, it uses the annual effective yield directly.

How is interest compounded?

For an APR quote, the nominal annual rate is divided into the selected compounding periods. For an APY quote, the effective annual growth rate is applied over the time period. The schedule displays estimated monthly or yearly changes.

How is estimated tax calculated?

If selected, tax is estimated as your entered percentage of positive interest at maturity. This is a simplified estimate and does not model annual tax payments, account-specific tax treatment, or local tax rules.

How is the early-withdrawal penalty estimated?

The penalty is modeled as the amount of interest the initial deposit would earn over the penalty months at the entered rate, capped at the available balance. Actual CD agreements may use a different formula or apply other conditions.

What assumptions should I check with the bank?

Confirm whether the advertised rate is APY or APR, how often interest compounds, whether interest is paid out or reinvested, the maturity date, renewal terms, fees, taxes, and any early-withdrawal penalty. This page does not show live rates or promise a return.