What is Annuity Payout Calculator?
Calculates guaranteed periodic monthly annuity disbursements from an immediate annuity lump sum.
How to Use This Calculator
- Enter starting lump sum balance.
- Choose payout duration in years.
- Set credited interest rate.
- View regular monthly payout and total cumulative income.
The Mathematical Formula & Variables
Monthly Payout = Principal * [ (r/12) / (1 - (1 + r/12)^(-12*years)) ]
Step-by-Step Worked Example
Scenario: $200,000 annuitized over 20 years at 5% interest.
- r/12 = 0.05 / 12 = 0.004167.
- Denominator = 1 - (1.004167)^-240 = 0.6310.
- PMT = 200,000 * (0.004167 / 0.6310) = $1,319.91 / month.
Result: $1,319.91 / month
Frequently Asked Questions
What is the difference between period certain and lifetime annuity?
Period certain pays for a fixed number of years (e.g. 20 years), while lifetime annuity guarantees income until death regardless of lifespan.