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CD Interest Calculator

For retirees, income investors, and cash managers, knowing exactly how much cash flow a Certificate of Deposit produces on a monthly, quarterly, or an

Finance
$
Initial capital deposited into the CD
% APY
Quoted Annual Percentage Yield
months
Duration of the certificate of deposit
How frequently interest earnings are paid out or calculated
Formula & Methodology
Periodic Interest = Total Accrued Interest ÷ Total Payout Periods | Daily Accrual = Total Interest ÷ (Years × 365)

Unlike tools that show only a final lump-sum figure, this tool evaluates interest per distribution cycle. By calculating the total compound yield over the holding period and dividing by the scheduled payout frequency, it establishes the predictable income stream generated by the deposit.

Periodic Interest Earnings ($41.67 per Month)

$41.67 / month per period

Overview

For retirees, income investors, and cash managers, knowing exactly how much cash flow a Certificate of Deposit produces on a monthly, quarterly, or annual schedule is critical. This CD Interest Calculator breaks down total maturity yield into discrete recurring income disbursements.

Educational & Cash Flow Planning Disclaimer: This calculator models periodic interest allocations. It is not financial or tax advice. Actual disbursement schedules depend on individual bank account agreements. Consult your financial institution.

Worked Examples

Monthly Income Stream: $100,000 CD at 5.0% APY (12 Months)

Deposit = $100,000, APY = 5.0%, Term = 12 months, Monthly Payout.

  1. Total interest over 12 months: $100,000 × 0.05 = $5,000.00.
  2. Monthly payout: $5,000.00 ÷ 12 = $416.67 per month.
  3. Daily interest rate: $5,000.00 ÷ 365 = $13.70 per day.
Final Answer: $416.67 / month ($5,000.00 total)

Quarterly Income Stream: $50,000 CD at 4.8% APY (24 Months)

Deposit = $50,000, APY = 4.8%, Term = 24 months (2 years), Quarterly Payout.

  1. Total maturity value: $50,000 × (1.048)^2 = $54,915.20.
  2. Total interest: $4,915.20 over 2 years.
  3. Total quarters: 2 × 4 = 8 quarters.
  4. Quarterly payout: $4,915.20 ÷ 8 = $614.40 per quarter.
Final Answer: $614.40 / quarter ($4,915.20 total)

Short 6-Month Certificate: $20,000 at 5.2% APY

Deposit = $20,000, APY = 5.2%, Term = 6 months, Monthly Payout.

  1. Total interest: $20,000 × [(1.052)^0.5 − 1] = $513.38.
  2. Monthly payout: $513.38 ÷ 6 = $85.56 per month.
Final Answer: $85.56 / month

How to Use This Calculator

  1. Enter your deposit amount and quoted APY.
  2. Enter certificate duration in months.
  3. Select your preferred payout distribution frequency (monthly, quarterly, annual, or at maturity).
  4. Review the exact dollar payment generated per period alongside daily accrual rates.

Frequently Asked Questions

Can I have my CD interest transferred directly into my checking account?
Yes. Most banks and credit unions allow you to elect whether interest is automatically reinvested back into the CD to compound, or deposited automatically each month into an external checking or savings account for living expenses.
What happens if I withdraw interest payments instead of reinvesting them?
Withdrawing interest each month eliminates the effect of compounding within the CD, so your total dollar return will equal simple APR interest rather than the higher compound APY.
Is CD interest subject to state and local income tax?
Yes. Unlike US Treasury bills (which are exempt from state and local income tax), interest earned on bank certificates of deposit is subject to both federal and state income tax.
How is this tool different from the standard CD Calculator?
The standard CD Calculator focuses on the final maturity balance and early withdrawal penalty calculations. This CD Interest Calculator focuses on income cash flow, isolating the exact dollar payout received per month, quarter, or year.
When is interest paid on a Certificate of Deposit?
Depending on the institution and account structure, interest is credited monthly, quarterly, semi-annually, or in a single lump sum upon maturity.

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Reviewed & Authored by: OnlineConvers Quantitative Finance Editorial Team · Last Updated: 2026-10-07
Decomposes compound Certificate of Deposit returns into periodic income disbursements. Allocates total interest mathematically across specified discrete calendar cycles (12 for monthly, 4 for quarterly, 1 for annually). Daily rate applies standard actual/365 convention. Displays currency values rounded to two decimal places.
Citations: Truth in Savings: Annual Percentage Yield Calculations (CFPB Appendix A to Part 1030) · Managing Fixed-Income Portfolios in Retirement (Journal of Financial Planning)