Retirement Withdrawal Calculator

Accumulation asked how much you need; retirement asks the harder question — how much can you take out, every year, without outliving the money. Enter your portfolio, expected return, inflation and the years the money must last, and this retirement withdrawal calculator gives the sustainable inflation-adjusted withdrawal — then stress-tests the withdrawal you actually want.

Working in Real Terms: The Only Honest Frame

Retirement withdrawals must keep pace with inflation — a fixed $40,000 cheque that buys a good life at 65 buys two-thirds of one at 85 — so this calculator works the way retirees actually live, in today’s money. The trick is one line of algebra: strip inflation from the return first. A portfolio earning 6 percent while inflation runs 2.5 percent has a real return of (1.06/1.025) − 1 = 3.41 percent — that, and not 6, is the rate your spending power compounds at. Everything else on the page then happens in constant dollars: the sustainable withdrawal is a level real amount, the balance is a real balance, and “the money lasts 58 years” means 58 years of the same standard of living. The model’s smoothness is its known lie — real markets deliver the average in lurches, and a bad first five years hurts a withdrawing portfolio far more than the same years later (sequence risk, the early-retirement page’s warning). Treat this page as the plan’s skeleton: the strategies below are the flesh that real retirements hang on it.

Worked Example: $1,000,000 for 30 Years

The defaults: a $1,000,000 portfolio, 6 percent returns, 2.5 percent inflation — the 3.41 percent real rate above. The sustainable 30-year withdrawal is $53,791 a year in today’s money (the nominal cheque grows each year with inflation; by year 30 it is roughly $113,000 of nominal dollars buying the same life). Sanity-check the figure against the famous rule: $53,791 is 5.4 percent of the portfolio — higher than the 4% rule’s $40,000, because this is a deterministic calculation (the money is exactly exhausted at year 30, assuming perfectly smooth returns), while the 4% rule is a survival calculation (the withdrawal that endured history’s worst sequences, usually leaving a surplus). The widget prices both lenses: the sustainable line is the smooth-math ceiling for your horizon; run your actual desired withdrawal — $40,000 here — and it reports the money lasting 58 years, nearly double the 30-year plan, which is the quantitative shadow of why conservative withdrawals so often end with the largest balance of the retiree’s life.

Withdrawal Strategies Beyond the Constant Line

Real retirements rarely withdraw a metronome amount, and the main strategies are refinements of this page’s baseline. Constant real (the model’s own) maximises early stability and accepts end-of-plan exhaustion in the model — in practice leavened by the other rules. Percentage-of-portfolio (take 4-5 percent of whatever the balance is each year) can never fully run out, but income swings with markets — a fine fit for flexible budgets, a hard one for fixed costs. Guardrails (the Guyton-Klinger rules) start near the sustainable line and adjust by formula: skip the inflation raise after down years, trim 10 percent if the withdrawal rate drifts above a ceiling, raise it if a floor is crossed — backtests show guardrails funding higher lifetime spending than constant-real at the same survival odds, by spending the good years’ surplus instead of dying with it. Bucket strategies hold 1-3 years of withdrawals in cash, several more in bonds, the rest in equities, refilling from whichever asset had a good year — psychologically powerful, mathematically a smoothing of the same sequence problem. And the floor beneath them all: guaranteed income (Social Security, pensions, annuities) covering essentials converts the portfolio’s job to funding the discretionary — the smaller the portfolio’s essential burden, the braver every strategy above can afford to be. The IRS’s required minimum distribution rules set the legal frame for tax-deferred accounts from your 70s onward — withdrawals you must take whatever your strategy says.

Taxes, RMDs and the Order of Accounts

The calculator speaks pre-tax because every household’s tax map differs, but the ordering of withdrawals is general enough to state: required minimum distributions from traditional accounts are compulsory at their ages (currently beginning at 73, rising to 75 for younger cohorts) and taxed as ordinary income; taxable-account withdrawals are the most flexible (capital gains rates, and only on the gain); Roth withdrawals are tax-free and carry no RMDs for the owner — the strategic reserve for high-expense years and late-life longevity insurance. The craft of drawdown is largely the craft of keeping each year’s taxable income inside favourable brackets — “filling the bracket” with conversions in low-income early-retirement years is the canonical move — which is why the sustainable-withdrawal number should always be read as gross, and why two retirees with identical portfolios and different account mixes retire on genuinely different incomes. A fiduciary adviser’s fee is often earned in this section alone; the calculator’s job is to make sure you arrive at that conversation knowing the size of the prize.

Revisiting the Number: Withdrawal Is a Practice, Not a Decision

No figure computed at 65 should run unexamined to 95, and the healthy retirements treat this page as an annual ritual rather than a one-time verdict. Recompute the sustainable withdrawal each year with the actual balance, the actual remaining horizon, and the same real-rate discipline: after strong markets the sustainable line rises (and the guardrail traditions say to bank most of the rise rather than spend it), after weak ones it falls — and the adjustments retirees actually make are graded and survivable precisely because they are small and early, not large and late. Keep two numbers from each year’s run: the sustainable withdrawal for the remaining years, and the funded ratio of your essentials (guaranteed income plus the portfolio’s conservative-case withdrawal, divided by essential spending). Essentials funded above 1.0 in the stress case is the definition of a retirement that market weather can inconvenience but not threaten — and reaching it, visibly, on one page a year, is most of what financial peace in retirement is made of.

Related Tools

More from the Finance Calculators hub: the Early Retirement Calculator — the accumulation side of this plan — the CPI Inflation Calculator for the inflation assumption’s own arithmetic, and the Discounted Cash Flow Calculator, the same discounting logic priced for investments.

Frequently Asked Questions

Why is the sustainable withdrawal higher than the 4% rule?

Because they answer different questions. This page: “what constant real withdrawal exactly exhausts the portfolio in 30 years if returns arrive smoothly at the assumed rate?” The 4% rule: “what withdrawal would have survived the worst 30-year sequences in market history, with returns arriving in their actual, jagged order?” The gap between $53,791 and $40,000 is the insurance premium against sequence risk and longevity — you spend it, knowingly, by choosing the lower figure; or you reclaim part of it with guardrails that cut spending only when markets actually misbehave.

What if I live longer than the plan?

Then the plan’s horizon was wrong, not its arithmetic — which is why horizons should be set at a longevity you are unlikely to reach, not the one you expect: for a healthy 65-year-old couple, at least one partner reaching 90 is roughly a coin flip and 95 is a live possibility, so 30-35 year plans are the responsible default at 65. The backstops are structural: guaranteed income floors (delayed Social Security is the cheapest longevity insurance sold), home equity as the reserve of last resort, and spending flexibility concentrated in the early years, when adjustments still compound.

Should withdrawals happen monthly or yearly?

The mathematics barely notices; the behaviour does. Monthly withdrawals mimic a salary and suit most households’ budgeting; yearly withdrawals simplify tax management (one decision, timed with conversions and gains harvesting). What matters more is the source discipline: withdraw from the asset that has drifted above its target allocation — rebalancing by withdrawal is free portfolio maintenance — and never sell equities in a crash to fund spending that a cash buffer was supposed to cover. That buffer, 1-2 years of withdrawals, is the cheapest sequence-risk insurance in this entire article.

How do pensions and Social Security change the number?

They shrink the job. If guaranteed income covers $30,000 of the spending a $53,791 withdrawal would fund, the portfolio need only sustainably supply the rest — enter the portfolio and read the sustainable line against your uncovered spending, or equivalently capitalise the pension (a $30,000 inflation-indexed pension is roughly a $750,000 asset at the 25x convention) and add it to the balance side. The early-retirement page’s target arithmetic handles the same idea from the accumulation side; the two pages are built to be used as a pair.

Should part of the portfolio be annuitised?

An immediate annuity converts a lump sum into the one thing a portfolio cannot promise — income that cannot be outlived — and for the essentials floor it is a rational purchase: annuitise the gap between guaranteed income and essential spending, and the rest of the portfolio is freed to follow this page’s strategies with less fear. The costs are real (irreversibility, insurer credit, inflation erosion in a level annuity unless indexed, and fees embedded in the payout rate), and the timing matters — payout rates improve with age and interest rates, so partial annuitisation in the late 60s or 70s, rather than at 65, is the common professional pattern. Run the comparison on this page’s frame: capitalise the annuity quote at your real rate and see what sustainable withdrawal the remaining portfolio must then supply.

What return and inflation should I assume?

Conservatively, and as a pair: the real rate is what matters, and history’s long-run real returns are roughly 5 percent for equities, 2-3 percent for balanced portfolios, near zero for cash. This page’s defaults (6 nominal, 2.5 inflation, 3.41 real) describe a balanced portfolio with a margin. Run your plan at a 2 percent real rate as the stress case: if the sustainable withdrawal there still covers your essentials — with guaranteed income counted — the plan is robust; if it only works at 5 percent real, the plan is a hope wearing a spreadsheet.