$1,321,853
$1,903,017
4
%
$32,000
$40,000
$3,333
$1,321,853
$1,903,017
4
%
$32,000
$40,000
$3,333
The Retirement Withdrawal Calculator simulates your portfolio's depletion over time based on your annual withdrawal amount, investment returns, and inflation adjustments. This tool answers the critical retirement question: will my money last as long as I need it to? By modeling year-by-year portfolio dynamics, it reveals whether your withdrawal strategy is sustainable or heading toward depletion.
The withdrawal rate — the percentage of your portfolio you withdraw annually — is the single most important factor determining portfolio longevity. The 4% rule (withdrawing 4% in year one, then adjusting for inflation) has historically survived most 30-year periods. However, this is not a guarantee. Market conditions at the start of your retirement, unexpected expenses, and longer-than-expected lifespans can all challenge even well-planned withdrawal strategies.
Inflation-adjusted withdrawals are the more realistic option for retirement planning. While taking a fixed $40,000 per year seems straightforward, purchasing power erodes significantly over time. At 3% inflation, $40,000 today has the buying power of only about $24,000 in 17 years. Adjusting withdrawals for inflation means each year you withdraw slightly more to maintain your standard of living, which puts greater strain on your portfolio over time.
The relationship between investment returns and withdrawal rate determines your portfolio trajectory. If your annual return exceeds your withdrawal rate, your portfolio grows despite withdrawals. If returns fall below your withdrawal rate for extended periods, the portfolio enters a depletion spiral — each year you withdraw a larger percentage of a shrinking balance, accelerating the decline. This is why maintaining a moderate withdrawal rate (3-4%) and a diversified portfolio is critical.
Our calculator provides a year-by-year simulation that accounts for the compounding effects of returns and inflation simultaneously. It shows how many years your portfolio will last, the ending balance if funds remain after your planned retirement period, and the total amount you will have withdrawn. These outputs help you calibrate your withdrawal strategy and assess whether adjustments are needed.
The calculator runs a year-by-year simulation: each year, the portfolio balance grows by the annual return, then the withdrawal is subtracted. If inflation adjustment is enabled, the withdrawal increases by the inflation rate each year. The simulation continues until the balance reaches zero or the retirement period ends. Withdrawal rate is simply annual withdrawal divided by initial portfolio value times 100.
If your portfolio lasts longer than your planned retirement, you are in good shape. If it depletes before your planned end date, you need to reduce withdrawals, increase returns (cautiously), or reduce the inflation adjustment. A withdrawal rate below 4% with inflation adjustment is generally sustainable for 30 years; below 3.5% for 40+ years.
Inputs
Results
$1M portfolio with 4% initial withdrawal at 6% returns lasts 30 years with $371K remaining.
Inputs
Results
6.25% withdrawal rate depletes $800K portfolio in about 22 years.
The commonly cited safe withdrawal rate is 4% of your initial portfolio, adjusted for inflation annually. Historical analysis shows this has a 95% success rate over 30-year periods. More conservative planners recommend 3-3.5%.
If you adjust for inflation, your dollar withdrawal increases each year to maintain purchasing power. At 3% inflation, a $40,000 withdrawal becomes $52,000 in 10 years and $97,000 in 30 years. This progressive increase puts significant strain on your portfolio.
Early retirement losses (sequence of returns risk) are especially damaging. A 30% drop in year one combined with withdrawals can permanently reduce your portfolio. Maintaining 1-2 years of cash and reducing withdrawals during downturns helps mitigate this risk.
Variable strategies (adjusting withdrawals based on portfolio performance) are more sustainable than fixed strategies. The guardrails approach raises withdrawals when the portfolio grows and reduces them after declines, extending portfolio longevity.
Withdrawals from Traditional IRAs/401(k)s are taxed as ordinary income. Strategic withdrawal ordering (taxable first, then tax-deferred, then Roth) can minimize lifetime taxes. Consider staying within lower tax brackets each year.
The bucket strategy divides your portfolio into time-based segments: Bucket 1 (1-2 years of expenses in cash), Bucket 2 (3-7 years in bonds), Bucket 3 (8+ years in stocks). This prevents selling stocks during downturns while maintaining liquidity.
Using the 4% rule: $40,000 per year ($3,333/month) initially, adjusted for inflation. At 3.5%: $35,000/year. At 5%: $50,000/year (but with higher depletion risk). Your optimal rate depends on your time horizon and risk tolerance.
This is longevity risk — the primary concern of retirement withdrawal planning. Safety nets include Social Security, potential part-time work, downsizing housing, or purchasing an annuity with a portion of your portfolio to guarantee a base income.
Living on returns only (interest and dividends) preserves principal but typically supports only 2-3% withdrawals for diversified portfolios. Most retirees need to spend principal gradually. The key is doing so at a sustainable rate.
Review annually at minimum. Assess your remaining portfolio, remaining life expectancy, spending needs, and market conditions. Be prepared to reduce withdrawals by 10-20% during extended market downturns to preserve portfolio longevity.
Roboculator Team
The Roboculator Team explains calculations, planning tools, and practical formulas in clear language for real-life situations.
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