Retirement

Retirement Withdrawal & Longevity Calculator

Calculate how many years your retirement nest egg will last based on monthly withdrawal amounts, portfolio return, and inflation.

What this calculator does

The Retirement Withdrawal & Longevity Calculator estimates your result instantly from the values you enter, using standard retirement formulas. Calculate how many years your retirement nest egg will last based on monthly withdrawal amounts, portfolio return, and inflation. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate for planning rather than financial advice.

Retirement Withdrawal Calculator (Portfolio Longevity) Results

$0.00

Years the Portfolio Lasts

  • First-Year Withdrawal —
  • Outcome —

What This Means

About Retirement Withdrawal & Longevity Calculator

The Retirement Withdrawal Calculator models portfolio decumulation and longevity, forecasting the exact year your retirement nest egg will be depleted under custom monthly withdrawal rates.

Formula & Mathematical Calculation

Portfolio_{t} = Portfolio_{t-1} × ( 1 + Return % ) - Annual Withdrawal_t × ( 1 + Inflation % )

Calculation Example

$1,000,000 Portfolio withdrawing $60,000/yr (6% rate) @ 6% Return & 3% Inflation: Portfolio lasts 23 Years (Depleted at Age 88). Lowering withdrawal to $40,000/yr (4% rate) → Portfolio lasts indefinitely!

Key Benefits

  • Calculates portfolio longevity and depletion risk in retirement
  • Models sequence of returns risk and inflation-adjusted withdrawals
  • Compares fixed dollar withdrawals vs. dynamic percentage withdrawals
  • Helps retirees establish a sustainable withdrawal rate
  • Free financial longevity tool

How to Use this Calculator

  1. Enter Total Starting Nest Egg
    Input portfolio value at retirement.
  2. Enter Desired Annual Withdrawal Amount
    Input annual spending withdrawn from portfolio.
  3. Enter Expected Return & Inflation
    Input portfolio return (e.g. 6%) and inflation rate (e.g. 3%).
  4. Calculate Longevity
    Click Calculate to view years until depletion and annual balance trajectory.

Assumptions & Limitations

What the calculation assumes

  • Every value you enter is treated as an exact, known amount.
  • Rates and contributions are assumed to stay constant for the whole period unless the form asks for them separately.
  • Results use standard financial formulas and ignore fees, penalties and promotional terms that are not entered above.
  • Inflation, tax changes and market volatility are not modelled unless a field for them is provided.
  • Amounts are unit-agnostic: results are returned in the same currency you enter.

What it does not cover

  • Retirement Withdrawal & Longevity Calculator produces estimates for education and planning, not a quote, offer or professional advice.
  • Real-world outcomes differ when fees, taxes, rounding rules or provider-specific terms apply.
  • Local regulations and tax rules vary by country and change over time; verify current rules for your jurisdiction.
  • Figures are only as accurate as the inputs you supply — check them before acting on the result.
  • For decisions with lasting financial impact, confirm the numbers with a qualified professional.

Frequently Asked Questions

Withdrawal rates above 5% significantly increase the risk of running out of money before age 90, especially if the market experiences downturns in early retirement years (sequence of returns risk).

It runs a year-by-year simulation. Each year it grows the balance by your return rate, then subtracts that year's withdrawal, and counts the years until the balance reaches zero. The first year's withdrawal is your stated amount, and later withdrawals rise with inflation.

To preserve your purchasing power. The tool raises each year's withdrawal by your inflation rate compounded from the start, so a $40,000 withdrawal at 3% inflation becomes about $41,200 in the second year and keeps climbing, matching the rising cost of living through retirement.

The simulation stops at 100 years. If the balance is still positive after being grown and drawn down for that long, the tool reports the portfolio as effectively self-sustaining under your assumptions, meaning your return is keeping pace with or outrunning the inflation-adjusted withdrawals.

Each year the balance earns your return rate while the withdrawal grows by inflation. A higher return extends the timeline, and higher inflation shortens it because withdrawals escalate faster. The gap between those two rates largely drives how quickly the balance is drawn down.

Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.

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Next step: browse the full Retirement calculators or read the related guides for context before you decide.