Annuity Payout Calculator
Enter your lump sum, interest rate and payout period to see your own monthly, annual and total payout from a fixed annuity.
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Adjust values to see instant results
Monthly Payout
Estimated • Based on your inputs
Total Payout Over Period
$395,973.00
Detailed Breakdown
Disclaimer: This calculator provides estimates for informational purposes only. Results should not be considered financial, tax, or legal advice. Consult a qualified professional for your specific situation.
How This Calculator Works
Calculation methodology and assumptions
Uses the standard fixed-period annuity payment formula (the same amortization math used for loan payments, applied in reverse): monthly payout = P × [r(1+r)^n] / [(1+r)^n - 1], where P is the lump sum, r is the monthly rate, and n is the number of monthly payments. This models a fixed-period ("period certain") annuity that fully depletes the principal plus interest by the end of the payout period — actual insurance-company annuity products may include fees, riders, or lifetime-payout guarantees not modeled here.
How to Use This Investment & Retirement Calculator
- 1
Fill in Lump Sum (Premium Paid)
Lump Sum (Premium Paid) starts at $250,000. Replace it with your own figure.
- 2
Fill in Annual Interest / Payout Rate
Annual Interest / Payout Rate starts at 5%. Replace it with your own figure.
- 3
Fill in Payout Period (years)
Payout Period (years) starts at 20. Replace it with your own figure.
- 4
Read the results
The calculator leads with Monthly Payout and Total Payout Over Period, followed by 2 supporting figures.
Example Calculation
What the calculator above returns before you change anything: a $250,000 lump sum paid out monthly for 20 years at a 5% annual rate.
The annual rate becomes 0.4167% a month, and 20 years is 240 payments. The level payment that brings $250,000 to zero after the last of them, while the unpaid balance keeps earning interest, is $1,649.89 (payment = P × r(1+r)^n ÷ ((1+r)^n − 1), with r the monthly rate and n = 240).
Result: Monthly payout: $1,649.89, about $19,799 a year. The 240 payments total $395,973, of which $145,973 is interest. Payments stop after 20 years; an insurer's lifetime annuity is priced on life expectancy and its own fees, so its quote will differ.
What Affects Your Results
Rate of Return
Even small differences compound massively over time. 7% vs. 8% over 30 years on $100K means a difference of $200K+. Asset allocation drives your expected return.
Time Horizon
Compounding accelerates exponentially. Most of your wealth is generated in the final years — a 30-year investment earns more in its last 5 years than its first 15.
Contribution Consistency
Regular monthly investments (dollar-cost averaging) smooth out market volatility and ensure you're always buying — including during dips when prices are low.
Fees & Expenses
A 1% annual fee vs. 0.1% fee on a $500K portfolio costs you $4,500/year extra. Over 30 years, high fees can consume 25–30% of potential returns. Use low-cost index funds.
Tips & Best Practices
- Start early. Thanks to compounding, $200/month invested from age 25 to 65 at 8% returns grows to ~$700K. Waiting until 35 cuts that to ~$300K — a $400K penalty for the 10-year delay.
- Don't try to time the market. Research consistently shows that time in the market beats timing the market. Missing the 10 best trading days over 20 years can halve your returns.
- Consider tax-advantaged accounts first: 401(k) (especially with employer match), IRA, HSA. These reduce your tax drag — a 25% tax bracket investor keeps more in a tax-deferred account.
- Rebalance annually. If stocks outperform and grow from 80% to 90% of your portfolio, rebalancing back to 80% locks in gains and manages risk.
- Factor in your state's tax treatment of investment income. Some states exempt certain investment income or have lower rates on capital gains.
StateCalc Team
Editorial Team
The StateCalc team builds financial calculators using data from official government sources including the IRS, U.S. Census Bureau, BLS, and state revenue departments. All formulas are validated by an automated test suite and cross-referenced against published data.
Our editorial standardsFrequently Asked Questions
How is an annuity payout calculated?
A fixed-period annuity payout is calculated the same way as a loan payment, but in reverse: your lump sum is treated as principal that's paid out (instead of paid in) over the period, with interest continuing to accrue on the remaining balance each month.
What is the difference between a fixed-period and a lifetime annuity?
A fixed-period ("period certain") annuity pays out over a set number of years and then stops, regardless of whether you're still alive — this calculator models that type. A lifetime annuity instead pays until death, which requires life-expectancy/mortality assumptions and is priced by an insurance company, so payouts will differ from this simplified calculation.
Are annuity payouts taxable?
It depends on how the annuity was funded. Payouts from a qualified annuity (funded with pre-tax retirement money, like an IRA) are generally fully taxable as ordinary income. Payouts from a non-qualified annuity (funded with after-tax money) are only taxed on the portion representing investment growth, not the return of your original principal.
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