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The four-percent rule for safe withdrawals during retirement
Jul
Retirement creates a wonderfully strange financial problem: after spending decades being told to save, invest, and stop buying coffee that costs more than a sandwich, you suddenly need to start spending the money. The obvious question is also the uncomfortable one: How much can I withdraw each year without running out?
The four-percent rule offers a simple starting answer. Withdraw 4% of your investment portfolio during your first year of retirement, then increase that dollar amount with inflation in later years. The approach was designed to support roughly 30 years of inflation-adjusted retirement spending from a diversified portfolio. It remains one of the best-known retirement withdrawal strategies, although modern research increasingly treats it as a planning benchmark rather than a law carved into a granite 401(k) statement.
What is the four-percent rule?
The four-percent rule is a method for turning retirement savings into an annual income stream. You calculate 4% of your portfolio’s value when retirement begins. That amount becomes your first-year withdrawal. In subsequent years, you adjust the dollar amount for inflation rather than repeatedly taking 4% of the changing account balance.
A simple example
Suppose you retire with a $1 million investment portfolio:
- First-year withdrawal: $1,000,000 × 4% = $40,000
- If inflation is 3%, second-year withdrawal: $40,000 × 1.03 = $41,200
- If inflation is 2.5% the following year: $41,200 × 1.025 = $42,230
Your withdrawal is not automatically reset to 4% of whatever the portfolio happens to be worth each January. If the account falls to $850,000 after a difficult market year, the traditional rule would still call for the inflation-adjusted dollar amount. That distinction is important. Otherwise, retirement income could bounce around like a grocery cart with one defective wheel.
The rule also applies only to withdrawals from the investment portfolio. Social Security, pensions, rental income, annuity payments, and part-time earnings are separate income sources. A retiree who needs $70,000 a year but receives $35,000 from Social Security may need the portfolio to provide only the remaining $35,000.
Where did the 4% retirement rule come from?
Financial planner William Bengen introduced the foundational research in 1994. Instead of relying on average investment returns, he examined actual historical sequences of stock returns, bond returns, and inflation. His goal was to find an initial withdrawal rate that survived difficult 30-year retirement periods, including periods beginning near major bear markets or high inflation.
Later research by Philip Cooley, Carl Hubbard, and Daniel Walzcommonly associated with the Trinity Studytested various withdrawal rates, asset allocations, and retirement lengths. Their historical analysis found that inflation-adjusted withdrawal rates around 3% to 4% produced strong success rates across many 30-year periods when portfolios included meaningful stock exposure. The studies also demonstrated that withdrawal success depends on more than a portfolio’s average return. The timing of gains and losses can matter enormously.
Why the four-percent rule can work
It accounts for inflation
A retirement plan must protect purchasing power, not merely preserve the same number of dollars. A $40,000 lifestyle today will probably cost more 10, 20, or 30 years from now. Annual inflation adjustments help the withdrawal amount keep pace with rising prices.
It assumes continued investment growth
The rule does not require retirees to hide their life savings under a mattress, where the only guaranteed return is lower-back pain. It assumes a diversified portfolio containing stocks and bonds. Stocks provide long-term growth potential, while high-quality bonds can reduce volatility and supply funds during market declines.
Historical studies generally found that portfolios needed sufficient equity exposure to support inflation-adjusted withdrawals over long periods. An all-cash or all-bond strategy may feel safe in the short term, but inflation can quietly damage its purchasing power. At the other extreme, an extremely aggressive stock allocation can expose a retiree to severe losses at exactly the wrong moment.
It creates a usable spending target
Retirement planning can involve forecasts for inflation, longevity, taxes, market returns, health costs, and spending patterns. The four-percent rule turns that intimidating spreadsheet jungle into a practical first estimate.
It also creates the familiar “25 times spending” guideline. Because 4% is one twenty-fifth of a portfolio, someone who needs $40,000 annually from investments would target approximately $1 million. A person needing $20,000 would target about $500,000. This is useful for estimating a goal, but it should not be mistaken for a personalized guarantee.
Is 4% still considered a safe withdrawal rate?
There is no single rate that is safe for every retiree in every market environment. Vanguard, Fidelity, Schwab, and other major U.S. financial institutions continue to describe approximately 4% to 5% as a general starting range, usually with significant qualifications involving retirement length, asset allocation, inflation, and spending flexibility.
Morningstar’s retirement-income research published for 2026 estimated a 3.9% starting rate for retirees seeking steady inflation-adjusted withdrawals, a 30-year planning period, and a 90% probability of retaining funds at the end of that period. That estimate is not a declaration that withdrawing 4% will suddenly cause financial smoke to pour from your IRA. It reflects Morningstar’s current capital-market assumptions and a specific set of planning conditions.
More flexible strategies may support higher initial spending because retirees agree to reduce withdrawals after poor market performance. Morningstar’s recent research, for example, found that some guardrail-based methods permitted initial rates above the static baseline. The trade-off is that annual income becomes less predictable. A higher starting paycheck sounds delightful until the strategy asks for a pay cut during a bear market.
The biggest weaknesses of the four-percent rule
Sequence-of-returns risk
The greatest threat is not simply earning a low average return. It is experiencing large investment losses early in retirement while simultaneously withdrawing money.
Imagine two retirees who earn identical average returns over 30 years. One enjoys strong gains during the first decade and encounters losses later. The other experiences the same returns in reverse order. The second retiree may run out of money much sooner because early withdrawals force the sale of more shares at depressed prices. Once those shares are sold, they cannot participate in the eventual recovery.
This is sequence-of-returns risk, and it explains why the first several years of retirement deserve special attention. Maintaining a cash reserve, holding high-quality bonds, reducing discretionary spending after losses, or working slightly longer can reduce the need to sell stocks during a downturn.
A retirement may last longer than 30 years
The classic rule was built around an approximately 30-year period. Someone retiring at 50 or 55 might need the portfolio to last 40 years or more. Early retirees generally need a lower starting withdrawal rate, additional flexibility, or future income from work and Social Security. T. Rowe Price notes that the familiar 4% guideline was developed for a more conventional retirement horizon and may be less reliable for people retiring early.
Spending rarely follows a smooth inflation line
Actual retirement spending is lumpy. A retiree may spend heavily on travel during the early “go-go” years, slow down later, and then face rising healthcare or caregiving costs. Roof replacements, dental work, family assistance, and the occasional decision to purchase a small boat named Budget Destroyer do not politely increase at the Consumer Price Index each year.
A better plan separates essential recurring expenses from optional spending and large irregular costs. The four-percent calculation can cover the core annual budget, while a separate reserve handles home repairs, vehicle replacement, medical expenses, and other surprises.
Taxes and investment fees reduce spendable income
A $40,000 withdrawal is not necessarily $40,000 available for groceries, housing, and travel. Traditional IRA and 401(k) distributions are generally taxable as ordinary income. Selling assets in a taxable account may create capital gains. Investment expenses and advisory fees also reduce the amount the portfolio can support.
Required minimum distributions add another complication. Under current federal rules, many owners of traditional IRAs and workplace retirement accounts generally begin RMDs at age 73, although exceptions and later starting ages can apply depending on birth year and employment status. An RMD is a tax rule, not a personalized spending recommendation; it can be higher or lower than the amount produced by a four-percent plan.
Healthcare and long-term care can disrupt the plan
Routine retirement budgets often underestimate the possibility of extended caregiving or custodial care. Medicare covers many medical services, but it generally does not pay for ongoing non-medical long-term care, such as help with bathing, dressing, eating, or other daily activities. Retirees may need savings, insurance, family support, or Medicaid eligibility to cover those expenses.
How Social Security changes the calculation
The four-percent rule should be applied to the portion of spending that must come from investments. Social Security can substantially reduce that burden.
For example, suppose a married couple expects to spend $75,000 annually and receives $45,000 from Social Security and pensions. Their portfolio must initially provide $30,000. At a 4% starting rate, that gap suggests a portfolio target of approximately $750,000 rather than $1.875 million.
Claiming decisions also matter. Social Security retirement benefits may begin as early as age 62, but starting before full retirement age generally reduces the monthly amount. Delaying beyond full retirement age increases the benefit until age 70, when additional delayed-retirement increases stop. Using portfolio withdrawals to bridge the years before claiming may produce a larger lifetime monthly benefit, although health, longevity, marital status, taxes, and immediate cash needs should be considered.
Alternatives to the traditional four-percent rule
Percentage-of-balance withdrawals
Withdraw a fixed percentage of the portfolio’s current value each year. This sharply reduces the chance of completely exhausting the account because withdrawals fall when the portfolio falls. The disadvantage is unpredictable income.
Spending guardrails
Begin with a target withdrawal, then increase or decrease spending when the withdrawal rate crosses predetermined boundaries. Guardrails let retirees enjoy more income when markets cooperate while requiring modest cuts when the portfolio deteriorates.
The floor-and-upside approach
Use Social Security, pensions, cash, bonds, or selected annuity income to cover essential costs. Invest the remaining portfolio for discretionary expenses such as travel, hobbies, and gifts. This separates “must pay” expenses from “would be delightful” expenses.
The bucket strategy
Divide assets by time horizon. A short-term bucket may contain cash for one or two years of spending. An intermediate bucket may hold bonds, while a long-term bucket contains stocks. The structure can make market declines emotionally easier to tolerate, although the buckets still need periodic rebalancing and should function as part of a diversified total-return plan.
How to use the four-percent rule more safely
- Calculate the spending gap. Subtract reliable income such as Social Security and pensions from estimated annual expenses.
- Choose a realistic time horizon. A 65-year-old planning for 30 years can tolerate a different withdrawal rate than a 50-year-old planning for 45 years.
- Include taxes and fees. Calculate the gross withdrawal required to produce the desired after-tax income.
- Build flexibility into discretionary spending. Identify expenses that could be postponed after a market decline.
- Maintain diversification. Avoid relying entirely on cash, bonds, dividend stocks, or any single asset class.
- Prepare for irregular costs. Keep a reserve for healthcare, home repairs, vehicles, and family needs.
- Review the plan annually. Recalculate after major changes in markets, inflation, health, marital status, or spending.
Experiences and practical lessons from applying the four-percent rule
The following composite experiences illustrate how the rule often behaves in real retirement planning. They are not promises or predictions, but they show why implementation matters as much as arithmetic.
Experience 1: The comfortable retiree who was afraid to spend
Linda retired at 66 with approximately $1.2 million, no debt, and enough Social Security to cover most of her basic bills. A 4% first-year withdrawal would have provided $48,000, but she withdrew less than half that amount because every market headline made her imagine living under a bridge by Thursday.
Her caution protected the portfolio, but it created a different problem: she repeatedly postponed travel, home improvements, and visits with distant relatives. After several annual reviews, it became clear that her essential expenses were largely covered by guaranteed income and that the portfolio was growing despite withdrawals.
The lesson was not that everyone should immediately spend more. It was that a safe withdrawal strategy should protect retirees from both financial ruin and unnecessary deprivation. A conservative rule designed to survive extremely difficult historical conditions can leave substantial assets untouched in average or favorable markets. Retirement planning should therefore include permission to spend, not merely instructions for avoiding catastrophe.
Experience 2: The couple who retired just before a downturn
Robert and Susan began retirement with $900,000 and planned a $36,000 first-year portfolio withdrawal. Within months, stocks declined sharply. Their original plan told them they could continue increasing withdrawals with inflation, but doing so felt reckless while the portfolio was shrinking.
Instead, they used a flexible guardrail. They canceled an expensive international trip, delayed replacing a vehicle, and temporarily held their withdrawal flat rather than applying the full inflation increase. Their essential bills remained covered, and the spending reduction lasted only until the portfolio recovered.
Their experience highlights the value of separating fixed and flexible expenses before retirement. A household that must spend every planned dollar has little room to respond to sequence risk. A household with optional travel, gifts, dining, or renovation expenses has a financial shock absorber. Flexibility does not mean spending nothing and eating crackers in the dark. It means deciding in advance which purchases can wait.
Experience 3: The early retiree who needed a smaller number
Marcus wanted to retire at 52 with $1.5 million and annual spending of $60,000. On the surface, his plan matched the four-percent rule exactly. The difficulty was his time horizon. His portfolio might need to support 40 or 45 years of withdrawals, not 30. He would also need to pay for health insurance before Medicare eligibility and wait years before claiming Social Security.
Rather than abandon retirement completely, he shifted to a 3.25% initial withdrawal, accepted occasional consulting projects, and planned to reduce portfolio withdrawals after Social Security began. The consulting income was modest, but every dollar earned during the first decade was a dollar that did not need to be removed from investments during a vulnerable period.
The practical lesson is that the retirement date itself can be flexible. Working one additional year, moving to part-time employment, or earning occasional income can have an outsized impact because it simultaneously adds savings, shortens the withdrawal period, and delays portfolio distributions.
Experience 4: The retiree surprised by taxes
Angela calculated that 4% of her $800,000 traditional IRA would provide $32,000. She combined that amount with Social Security and assumed the total would cover her lifestyle. Her first tax projection revealed the missing ingredient: much of the IRA withdrawal would be taxable, and additional income could affect the taxation of Social Security and certain healthcare-related costs.
She adjusted the plan by coordinating withdrawals from taxable savings, the traditional IRA, and a Roth IRA. During lower-income years, she also considered partial Roth conversions with help from tax professionals. Her spending did not change dramatically, but the source and timing of withdrawals did.
This experience demonstrates why the four-percent rule answers a portfolio question, not a complete tax-planning question. The account holding the money can be nearly as important as the withdrawal rate itself.
Experience 5: The annual review that prevented a permanent mistake
David initially treated the rule as a set-it-and-forget-it formula. After five years, his spending had changed, his Social Security income had begun, one mortgage had been paid off, and healthcare costs were higher than expected. His original withdrawal figure no longer described his actual needs.
An annual review revealed that he could reduce withdrawals without reducing his lifestyle because guaranteed income now covered more of the budget. The smaller withdrawals strengthened the plan and provided room for future healthcare expenses.
The broader lesson is simple: retirement is not one 30-year decision. It is a series of one-year decisions made with updated information. The four-percent rule is most useful as the opening chapter of a retirement income plannot the entire book, the index, and the author biography.
Conclusion
The four-percent rule remains a valuable starting point for estimating sustainable retirement withdrawals. It is easy to understand, incorporates inflation, and encourages retirees to connect annual spending with portfolio size. However, it cannot account automatically for every retirement length, tax situation, market sequence, healthcare need, or personal goal.
A retiree with strong guaranteed income, flexible discretionary spending, and a shorter horizon may be able to begin above 4%. Someone retiring early, carrying concentrated investments, or requiring rigid inflation-adjusted income may need to start below it. The safest strategy is usually not blind obedience to one percentage. It is a diversified portfolio, a realistic budget, flexible spending, thoughtful tax management, and regular reviews.
Note: This article is for general educational purposes and does not constitute personalized investment, tax, legal, or retirement-planning advice. Withdrawal decisions should be evaluated using individual expenses, assets, health, risk tolerance, tax circumstances, and retirement goals.
