Understanding Annuity Payment
Real-world scenario: PV $500,000; 5% annual; 20 years; monthly.
What is Annuity Payment?
A fixed-payment annuity math tool (loan-style amortization of a lump sum). Insurance quotes, mortality credits, and fees are not included.
- Ordinary annuity — end-of-period payments
- Fixed rate assumption
- Not an insurance illustration
The Formula
Ordinary Annuity PMT
PMT = PV × r ÷ (1 − (1+r)^(−n))
Worked Example
Scenario: PV $500,000; 5% annual; 20 years; monthly.
Step 1: r = 0.05/12; n = 240
Step 2: PMT ≈ $3,299.71
Answer: Monthly payment is about $3,299.71.
Common Use Cases
- Drawdown sketch: spend a nest egg over N years
- Quote check: compare to insurer PMT
- Period choice: monthly vs annual
Pro Tips
- Lower rate or longer term cuts each payment
- Inflation is not built in—use rising spending separately
- Pair with nest-egg tool for target sizing
Limitations: Annuity Payment results are educational retirement planning aids—not tax, Social Security, investment, or legal advice. Confirm figures with the IRS, SSA, plan administrators, and a qualified professional.
FAQ
Is this a SPIA quote?
No. Insurers price mortality and fees. This is pure time-value math on a fixed rate you enter.
What if the rate is 0%?
Payment is simply PV ÷ number of periods.
Authoritative References
For retirement education, consult:
- IRS retirement plans — contribution limits and RMDs
- Social Security Administration — benefit estimates
- Investor.gov — investor education