Annuity Payout Calculator Formula & How It Works
- PV = Lump sum used to purchase annuity
- r = Monthly interest/discount rate
- n = Expected payout period (life expectancy for life annuity)
- Life expectancy at 65 (US): ~20 years for male, ~22 for female
Annuity payout rates (how much income per $1,000 premium) depend on interest rates, your age, and payout type. Older annuitants get higher monthly payments because the payout period is shorter. A $100,000 immediate life annuity for a 65-year-old typically pays $500–$600/month depending on rates.