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Tool: Certificate of Deposit (CD) Calculator — APY & Maturity Interest | Printed on:
Certificate of Deposit (CD) Calculator — APY & Maturity Interest
Calculate fixed Certificate of Deposit earnings, APY compound interest, and maturity balance.
Parameters & Values
Computed Financial Summary
Real-timeAdjust parameters to update tax and amortization results.
Certificate of Deposit Compound Interest Formula
Transparent mathematical methodology explained in plain English.
Maturity Balance = P × (1 + APY)^t | Total Interest = Maturity Balance - Principal PCalculates the guaranteed interest paid on a locked fixed-rate bank deposit compounded daily or monthly over the term duration.
Variables Explained:
- Deposit Principal ($): Initial cash deposit.
- Annual Percentage Yield (APY) %: Guaranteed annual interest rate yield.
- Term Length (Months / Years): CD maturity period (e.g. 6 months, 12 months, 5 years).
$25,000 Deposit in a 12-Month CD at 5.25% APY
Calculating guaranteed interest paid at maturity.
- Interest Earned: $25,000 × 0.0525 = $1,312.50.
- Maturity Balance: $25,000 + $1,312.50 = $26,312.50.
Frequently Asked Questions: CD Calculator
Click any question below to expand quick answers, formulas, and expert tips.
What is an early withdrawal penalty on a CD?
Withdrawing funds before the maturity date typically incurs a penalty of 3 to 6 months worth of simple interest.
Are CDs protected by FDIC insurance?
Yes, CDs at FDIC-insured banks (and NCUA-insured credit unions) are backed by the full faith of the US government up to $250,000 per depositor, per institution.