Annuity Payout Calculator
Find the monthly payout any annuity balance will generate over a given period at a given rate, and see the total income and remaining balance at any point in the distribution.
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Enter your values above to see the results.
Tips & Notes
- ✓Use a 30-year distribution horizon as the conservative planning benchmark — a person retiring at 65 has a meaningful probability of living to 95.
- ✓Account for inflation in payout planning — a fixed $3,000/month payout loses purchasing power every year; consider increasing withdrawals annually by an inflation factor.
- ✓The interest rate during distribution is as important as the accumulation rate — a balanced portfolio earning 5-6% sustains meaningfully higher withdrawals than a conservative portfolio at 3-4%.
- ✓Sequence of returns risk matters in distribution — early large losses from a volatile portfolio can permanently impair sustainable withdrawal capacity even if long-term averages recover.
- ✓Consider annuitizing a portion of the portfolio for guaranteed base income — pairing a guaranteed income floor with a flexible portfolio for discretionary spending reduces longevity risk.
- ✓Social Security optimization — delaying claiming from 62 to 70 increases the monthly benefit by approximately 77%, effectively providing a larger guaranteed inflation-adjusted annuity.
Common Mistakes
- ✗Planning for a 20-year distribution when actual longevity risk may extend to 30+ years — underestimating lifespan is one of the most common and most consequential retirement planning errors.
- ✗Using a fixed interest rate without modeling the impact of a poor early return sequence — a market decline in years 1-3 of retirement with continued withdrawals can permanently impair portfolio sustainability.
- ✗Not inflation-adjusting the withdrawal amount over time — maintaining a fixed nominal withdrawal means real purchasing power declines by the inflation rate each year.
- ✗Withdrawing from tax-deferred and tax-free accounts in the wrong order — the sequencing of withdrawals from different account types (taxable, traditional, Roth) significantly affects lifetime taxes.
- ✗Ignoring required minimum distributions (RMDs) from traditional IRA and 401k accounts starting at age 73 — RMDs force minimum withdrawals regardless of spending needs, affecting planning.
- ✗Not updating the payout plan after significant life or market events — a large early portfolio loss or a major expense requires recalculating sustainable withdrawal to avoid premature depletion.
Annuity Payout Calculator Overview
An annuity payout calculator answers the core retirement distribution question: given a saved balance and an interest rate, how much can I withdraw each month for a specific number of years without running out of money? It also answers the reverse: given a desired monthly income, how large a balance do I need?
This is the financial plan behind every retirement: converting an accumulated portfolio into a sustainable income stream.
What each field means:
- Savings — the total balance available for distribution; the starting point of the payout calculation
- Interest Rate — the annual rate the balance earns during distribution; reduces the speed of drawdown
- Loan Term — the number of years the payout must last; use life expectancy or 30 years for conservative planning
- Down Payment — not applicable; the full savings balance is used for income generation
What your results mean:
- Monthly Payment — the equal monthly payout that will exactly exhaust the balance over the stated term
- Total Paid — all monthly payments received over the full distribution period
- Total Interest — interest earned on the declining balance during distribution; extends the payout period
- Remaining Balance — the balance at any point in the distribution timeline
Example — $600,000 savings, 5% annual rate, 25-year distribution:
Monthly payout: $3,510 Total payments over 25 years: $1,053,000 Interest earned during distribution: $453,000 Balance at year 10: approximately $497,000 (still substantial) Balance at year 20: approximately $236,000 Balance at year 25: $0 The $453,000 in earned interest extended the purchasing power of the original $600,000 by 75%.
EX: $600,000 at 5% — how the desired payout changes the timeline $2,500/month: balance lasts 40+ years (portfolio may actually grow) $3,510/month: balance lasts exactly 25 years $4,000/month: balance lasts approximately 19 years $5,000/month: balance lasts approximately 13 years $6,000/month: balance lasts approximately 10 years Each $500 more per month shortens the sustainable period by roughly 4-5 years.
Monthly payout by balance and rate — 25-year distribution:
| Balance | 4% rate | 5% rate | 6% rate |
|---|---|---|---|
| $300,000 | $1,584 | $1,755 | $1,933 |
| $500,000 | $2,640 | $2,923 | $3,222 |
| $750,000 | $3,959 | $4,385 | $4,833 |
| $1,000,000 | $5,279 | $5,846 | $6,444 |
Balance needed for target monthly payout — 25 years at 5%:
| Target Monthly Payout | Balance Required | Annual Withdrawal Rate |
|---|---|---|
| $2,000/month | $342,000 | 7.0% |
| $3,000/month | $513,000 | 7.0% |
| $4,000/month | $684,000 | 7.0% |
| $5,000/month | $855,000 | 7.0% |
The most critical insight from payout planning is that the interest rate during distribution profoundly affects sustainability. A 1% difference in the distribution rate — from 4% to 5% — allows an additional $150-$200/month in sustainable payout from the same balance over 25 years. This is why retirees with bond-heavy portfolios earning 3-4% have very different sustainable withdrawal amounts than those with balanced portfolios earning 5-6%.
Frequently Asked Questions
At a 5% annual distribution rate over 25 years, $500,000 supports approximately $2,923/month. At 4%, it supports $2,640/month. At 6%, it supports $3,222/month. Using the 4% annual withdrawal rule (designed for 30-year sustainability): $500,000 x 4% / 12 = $1,667/month. The 4% rule is more conservative because it assumes the balance earns variable market returns rather than a fixed rate, and adjusts annually for inflation. The fixed-rate calculation is useful for comparing scenarios; the 4% rule is more appropriate for real retirement planning with an inflation-adjusted spending target.
At $4,000/month (4.8% annual withdrawal) with 5% distribution rate: approximately 37 years. At $5,000/month (6% annual withdrawal): approximately 26 years. At $6,000/month (7.2% annual withdrawal): approximately 20 years. At $3,333/month (4% annual withdrawal): the portfolio may last indefinitely at 5% returns. The critical variable is the withdrawal rate relative to the distribution rate — if you withdraw less than the portfolio earns in interest, the balance grows rather than declines. A $1,000,000 portfolio at 5% earns approximately $4,167/month — any withdrawal below that amount is self-sustaining.
The sustainable withdrawal rate is the maximum annual withdrawal percentage that avoids portfolio depletion over a target horizon, considering investment returns and inflation. The widely cited 4% rule (from the Trinity Study) suggests 4% of initial portfolio value annually, inflation-adjusted, is sustainable for 30 years based on historical US market returns. More conservative estimates of 3.3-3.5% reflect lower expected future returns and longer retirements. The sustainable rate depends on: portfolio asset allocation (higher equity exposure historically supports higher rates), time horizon (longer horizons require lower rates), and flexibility to reduce withdrawals during market downturns.
Sequence of returns risk is the danger that poor investment returns in early retirement, combined with ongoing withdrawals, permanently impair portfolio sustainability even if long-term average returns appear adequate. A 30% market decline in years 1-2 of retirement, while withdrawing $40,000/year from a $1,000,000 portfolio, leaves approximately $660,000 after two years. Recovery to the same average return as a non-declining scenario still leaves the retiree permanently behind because withdrawals were taken from a depleted balance. This risk is why cash buffers, lower equity exposure in early retirement, and flexibility to reduce withdrawals in down markets are valuable risk management tools.
Compare the present value of monthly payments against the lump sum offer. Divide the annual pension amount by 4-5% (your expected investment return) to estimate the equivalent lump sum. If the offered lump sum is above this equivalent value, taking the lump sum and investing it may be preferable. If below, the monthly pension offers better value. Other factors: the pension survivor benefit for a spouse, inflation adjustments (most pensions are not inflation-adjusted), your health and life expectancy, and whether you have other reliable income sources. A guaranteed inflation-adjusted pension benefit is worth more than the same nominal monthly amount without inflation protection.
Start with your desired monthly retirement income, subtract guaranteed income sources (Social Security, pensions), and the remainder must come from your portfolio. Multiply the required monthly portfolio withdrawal by 300 (the 4% rule equivalent: monthly need x 12 / 0.04). Example: need $6,000/month total, Social Security provides $2,500 — portfolio must generate $3,500/month. Required portfolio: $3,500 x 300 = $1,050,000. This is the starting point — adjust for your expected investment return, time horizon, inflation rate, healthcare costs, and whether you want to leave assets to heirs. The calculation is an estimate requiring regular updating as circumstances change.