Retirement Income Calculator
A $750,000 retirement fund sounds comfortable until you convert it into a paycheck. This retirement income calculator turns your savings into a monthly income figure with the annuity withdrawal formula, the same math pension plans use to set payment amounts. You get the monthly and annual income your nest egg can sustain, the lifetime total it pays out, and the savings target behind any monthly income goal you set.
Quick Answer
With $750,000 saved, a 5% annual return, and a 25-year retirement, this calculator pays out $4,384 a month ($52,613 a year), or $1,315,328 over the full period. That replaces 47.8% of a $110,000 pre-retirement income, below the commonly cited 70 to 80% target. Hitting a $6,000 monthly goal under the same assumptions takes $1,026,360 saved, which is $276,360 more than the starting balance.
- Monthly income is savings divided by an annuity factor. $750,000 at 5% over 25 years pays $4,384 a month, not $750,000 / 300 = $2,500, because the unspent balance keeps earning.
- The replacement ratio is the verdict that matters. Compare the annual payout to your pre-retirement pay; 70 to 80% is the standard planning target because some costs (saving, commuting, payroll taxes) disappear.
- Small changes move the number a lot. Working two extra years or earning one point more of return shifts the monthly payout by hundreds of dollars.
- This is the gross, pre-tax, pre-inflation paycheck. Taxes, health costs, and rising prices all come out of this number, so treat it as the ceiling, not the floor.
The annuity formula behind your monthly number
The direct answer: your monthly income equals savings times the monthly return, divided by one minus the discount factor for every month in retirement. Written out: Monthly income = P × (r/12) / [1 − (1 + r/12)−n], where P is your savings, r the annual return, and n the number of months. This is the standard present-value-of-an-annuity formula, and it is the same math pension actuaries use to convert a lump sum into a payment stream.
The intuition is simpler than the symbols. Each month you withdraw a payment and the remaining balance keeps compounding. Early withdrawals are mostly your own principal; later ones are increasingly funded by growth. If the return is zero, the formula collapses to savings divided by months, which is the sanity check built into the tool. The calculator runs this forward to give your payout, then runs it backward (solving for P) to tell you what a given monthly goal requires.
Worked example: turning $750,000 into $4,384 a month
Start with the defaults already filled in above and press Calculate to reproduce this exactly.
Our annuity income calculator runs the same math for purchased annuities if you are comparing a DIY drawdown against an insurance product.
Why the 70 to 80% replacement target exists
The short answer: most retirees need 70 to 80% of pre-retirement income because several big costs vanish. You stop saving for retirement (often 10 to 15% of pay), payroll taxes drop, commuting and work wardrobe costs end, and the mortgage is frequently paid off. The Bureau of Labor Statistics consumer expenditure data consistently shows retiree households spending meaningfully less than working households in the same income band.
The worked example lands at 47.8%, which is why the verdict badge flags it as a shortfall. Closing that gap means some combination of saving more, earning more return, retiring later, or spending less. The Federal Reserve’s Survey of Consumer Finances shows the median retirement account balance for near-retirees far below even the $750,000 used here, so running this math early is the whole point. For the full journey from savings rate to retirement date, our FIRE calculator maps the timeline, and our investment for retirement calculator models the accumulation phase that gets you to day one.
Annuity math vs the 4% rule
Two methods answer the same question, and they are not interchangeable. The annuity formula in this calculator spends the balance to exactly zero over your chosen horizon. The 4% rule, from William Bengen’s 1994 research, withdraws 4% in year one and adjusts for inflation, targeting a 30-year horizon with money left over.
- Ends at $0 by design, on your chosen date
- Higher payout: $52,613/year on $750,000
- No inflation adjustment built in
- Best when longevity is bounded and legacies are separate
- Designed to survive 30 years with a buffer
- Lower payout: $30,000/year on $750,000
- Inflation-adjusted withdrawals each year
- Best when you want a safety margin and an estate
The 4% rule pays less precisely because it must survive bad market sequences and inflation. Neither method includes Social Security, which for many households is the actual inflation-adjusted base layer. If you plan to draw down accounts strategically, our withdrawal retirement calculator covers sequencing across account types.
What most retirement income calculators miss
The thin tools in this space ask for three numbers and print one monthly figure. They skip the replacement ratio, which is the only context that tells you whether the number is enough. They never run the formula backward, so you cannot see what your goal actually costs. They ignore the lifetime total, which is the figure that makes compounding tangible, and they present the payout as spendable cash with no reminder that taxes, inflation, and health costs come out of it. This calculator adds the replacement verdict, the goal-to-savings reverse calculation, the lifetime payout, and an explicit end balance of zero so the spend-down design is never ambiguous. To grade that payout against the 70 to 80% target in one pass, run the same numbers through our retirement ratio calculator.
Frequently Asked Questions
At a 5% return over 25 years, multiply by the annuity factor of 171.06: $5,000 × 171.06 = about $855,300. Enter your own goal in the calculator to get the exact figure for your return and horizon.
Most planners use 4 to 6% nominal for a balanced portfolio in retirement, lower than accumulation-phase assumptions because the allocation is more conservative. Using 7%+ for a 25-year drawdown is optimistic and shrinks your safety margin.
No. The payout is in nominal dollars, so $4,384 buys less in year 25 than in year one. If you want inflation-adjusted spending power, either lower the return by expected inflation (a 5% nominal return at 3% inflation behaves like roughly 2% real) or plan a lower starting withdrawal.
Bengen’s rule withdraws 4% of the starting balance in year one, then adjusts for inflation each year, designed to last 30 years. On $750,000 that is $30,000 in year one versus this calculator’s $52,613, because the annuity method spends to zero on schedule while the 4% rule keeps a buffer.
That is exactly what the years input controls. If you are unsure, the Social Security Administration’s life expectancy tables suggest planning to at least 90 for a 65-year-old couple, since one spouse living that long is roughly a coin flip.
No. Treat Social Security as a separate, inflation-adjusted income layer on top of this payout. Most households should add their estimated benefit to the calculator’s monthly figure when judging whether the total covers spending.
Generally no, unless you plan to downsize or take a reverse mortgage. You cannot spend home equity on groceries without selling or borrowing, so counting it inflates the monthly number with money you cannot easily withdraw.
No. Withdrawals from traditional 401(k)s and IRAs are taxed as ordinary income, which can take 15 to 25% off the payout depending on your bracket. Roth withdrawals are tax-free in retirement, which is why account mix matters as much as the total.
Not with the annuity setting, which spends to exactly zero. If a legacy matters, shorten the spending horizon in the calculator, treat the leftover as the estate, or switch to a rule-based method like the 4% rule that preserves a buffer.
Yearly, or after any big market move. A 20% portfolio drop cuts the monthly payout by 20% under this math, which is the signal to trim spending, delay retirement, or adjust the return assumption rather than discovering the shortfall a decade later.
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References
- U.S. Securities and Exchange Commission. Saving and Investing for Retirement. Accessed October 18, 2026.
- Social Security Administration. Retirement Benefits: Life Expectancy Calculator. Accessed October 18, 2026.
- U.S. Bureau of Labor Statistics. Consumer Expenditures in 2023. Accessed October 18, 2026.
- Board of Governors of the Federal Reserve System. Survey of Consumer Finances. Accessed October 18, 2026.
- Internal Revenue Service. Retirement Plans: FAQs Regarding Required Minimum Distributions. Accessed October 18, 2026.
- Consumer Financial Protection Bureau. Planning for Retirement. Accessed October 18, 2026.
- FINRA. Retirement Calculator Resources. Accessed October 18, 2026.
- Social Security Administration. Retirement Estimator. Accessed October 18, 2026.
- Internal Revenue Service. Topic 558: Tax on Early Distributions from Retirement Plans. Accessed October 18, 2026.
- Charles Schwab. Beyond the 4% Rule: How Much Can You Spend in Retirement? Accessed October 25, 2026.