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Monthly Annuity Payment Estimator

This calculator helps you determine the fixed monthly payment for an annuity based on the principal amount, interest rate, and term. It’s essential for retirement planning, structured settlements, and any scenario involving regular withdrawals from an investment over time.

Calculate Fixed Monthly Payments for Annuities

Input Fields
P
$
Enter the present value or investment amount
r
%
Enter the annual interest rate
n
Enter total number of monthly payments
If enabled, the result will update automatically when you change any value.

Annuity Monthly Payment Formula

Formula
$$PMT = P \times \frac{r(1 + r)^n}{(1 + r)^n – 1}$$

Where:

  • PMT – monthly payment
  • P – principal or present value
  • r – monthly interest rate (annual rate Γ· 12)
  • n – total number of monthly payments

This formula calculates the amount to be paid monthly to amortize a loan or annuity.


Monthly annuity payments are commonly used in personal finance for calculating consistent payouts during retirement or repaying loans. This calculator assumes fixed interest and equal payments, making it suitable for fixed annuities, mortgages, and other amortized loan products. Just input the principal, rate, and number of months to get instant results.

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