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CD Calculator

CD Calculator

Estimate the end balance, gross interest, tax impact, and yearly schedule for a certificate of deposit or fixed-term savings account.

Deposit Length

About CD Calculator


CD Calculator estimates how a fixed deposit grows when interest compounds throughout the term. It also shows the effect of a marginal tax rate on the interest earned so you can compare gross growth against after-tax growth year by year.

How To Use It


Enter the opening deposit, the total term, the annual rate, and the compounding pattern.

  • Enter the initial deposit amount and the full deposit length in years and months.
  • Choose the annual interest rate and how often the deposit compounds.
  • Add the marginal tax rate to estimate after-tax growth, then click Calculate CD Growth.

Examples


  • Long-term deposit with monthly compounding
    Input:
    Initial Deposit: 20000
    Deposit Length: 15 years 0 months
    Interest Rate: 6%
    Compound: Monthly (APR)
    Marginal Tax Rate: 10%
    
    Output:
    End Balance: about $44,876.54
    Total Interest: about $27,640.60
    Total Tax: about $2,764.06
  • Shorter term certificate
    Input:
    Initial Deposit: 15000
    Deposit Length: 3 years 6 months
    Interest Rate: 4.4%
    Compound: Quarterly
    Marginal Tax Rate: 22%
    
    Output:
    Review the ending balance, net interest after tax, and the annual schedule.
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