How to Calculate Your Annuity Payout

Understanding how annuity payments are calculated empowers you to evaluate offers and make informed decisions.

The present value of an annuity formula determines the periodic payment based on a lump sum:

$$PMT = PV \times \frac{r(1+r)^n}{(1+r)^n - 1}$$

Where:

PMT = Periodic payment amount
PV = Present value (your principal/lump sum)
r = Interest rate per period
n = Total number of payment periods
Step-by-Step Example
Scenario: You receive a $500,000 settlement and choose a 10-year monthly payout at 4% annual interest.
1. Rate per period (r): 4% / 12 months = 0.333% per month = 0.00333

2. Total periods (n): 10 years × 12 months = 120 periods

Calculate factor: (1 + 0.00333)^120 = 1.4908

PMT: $500,000 × (0.00333 × 1.4908) / (1.4908 - 1)

Result: ≈ $5,061.67 per month

Duration

Monthly Payment

Total Payout

Interest Earned

5 years

$9,208

$552,479

$52,479

1. Interest Rate – Higher rates = smaller individual payments but higher total

Duration – Longer duration = smaller payments but much more total interest

Payment Frequency – Monthly vs. quarterly vs. yearly (monthly maximizes interest compounding benefits)

Tax Rate – Taxable portions reduce net income

Skip the math and use our interactive Structured Settlement Calculator to instantly model any scenario.