What Is the 4% Rule and Does It Still Work in Retirement?
Last reviewed: July 2026
The 4% rule says you can withdraw 4% of your retirement portfolio in year one, adjust that dollar amount for inflation each year after, and reasonably expect the money to last 30 years. It still works as a starting point for most retirees, but it is a guideline built on 1990s research, not a guarantee. Whether the 4% rule retirement strategy fits you depends on your time horizon, your spending flexibility, and how much of your essential expenses are already covered by Social Security or a pension.
That last part matters more than the number itself. A rule designed to survive the worst market sequence in U.S. history will, by definition, leave most retirees with money on the table. The real question is not "does the 4% rule still work?" It is "is the 4% rule the right tool for my situation, or am I either spending too cautiously or taking on more risk than I realize?"
Key Takeaways
- The 4% rule lets you withdraw 4% of your portfolio the first year, then adjust for inflation, with a 30-year horizon assumption.
- William Bengen's original 1994 research tested withdrawal rates against every 30-year period from 1926 forward, including the Great Depression.
- Bengen later revised his own safe withdrawal estimate upward to roughly 4.7% to 5% with broader asset diversification.
- A 1% difference in withdrawal rate equals $10,000 per year on a $1 million portfolio, compounding across decades.
- Guaranteed income from Social Security and pensions changes the math entirely and often justifies a higher portfolio withdrawal rate.
About the Author: Jeff Judge, CFP®, AEP®, ChFC®, CLU® is Managing Partner of Chesapeake Financial Planners in Forest Hill, Maryland. He has been helping families and business owners in Harford County and the Baltimore metro area navigate retirement income decisions since earning his CFP® certification in 2013, by using Chesapeake Financial Planners’ signature process, the R.U.D.D.E.R. method™. Jeff's take: the 4% rule is the financial planning equivalent of a thermostat set to one temperature for 30 years. Useful as a reference point, but no one actually lives that way, and the rigid version costs people either money or sleep.
On This Page
- Where the 4% rule came from
- What the 4% rule actually says
- Why today's environment looks different
- What recent research says about the 4% rule
- Why spending flexibility beats a fixed rule
- The personal factors that matter more than any rule
- A better framework than rigid withdrawal rules
- How Chesapeake Financial Planners approaches retirement income
- Frequently asked questions
Where Did the 4% Rule Come From?
The 4% rule originated with financial planner William Bengen in a 1994 paper published in the Journal of Financial Planning. Bengen wanted a data-driven answer to the single hardest question in retirement: how much can someone withdraw each year without running out of money?
How did William Bengen actually test it?
Bengen ran historical withdrawal scenarios against real U.S. market returns going back to 1926. He tested a portfolio of 50% stocks and 50% intermediate-term Treasury bonds across every rolling 30-year period, including retirees who started in the worst possible moments: just before the 1929 crash, into the stagflation of the 1970s, and through multiple recessions. He looked for the highest first-year withdrawal rate that would have survived all of them. Jeff Judge notes: "Bengen was solving for the worst retiree in history, not the average one, so when clients cite the 4% rule, I always want to know whether their situation looks more like 1929 or something far less catastrophic."
His answer was about 4%. A retiree who pulled 4% in year one and adjusted that dollar figure for inflation each year afterward would not have run out of money in any 30-year window he tested. That was a genuine breakthrough. Before Bengen, advisors were guessing. After Bengen, retirees had a number.
Here is the part most people skip. Bengen did not say 4% was the right or recommended rate. He said it was the rate that survived the worst case. There is a difference, and that difference is the entire story of why this rule gets misused.
According to research published by Morningstar, the 4% rule remains one of the most-cited retirement planning concepts three decades later, which is part of the problem. A guideline built for the 1929-into-the-Depression retiree gets applied, unchanged, to someone retiring in a completely different environment.
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What Does the 4% Rule Actually Say?
The 4% rule is a fixed-real-spending withdrawal strategy. You take 4% of your starting portfolio balance in year one, then increase that dollar amount by inflation every year regardless of what markets do.
What does that look like in real numbers?
Say you retire with $1 million. Under the 4% rule, you withdraw $40,000 in year one. If inflation runs 3% that year, you withdraw $41,200 the next year, then adjust again the following year, and so on. Your withdrawal is tied to your starting balance and inflation, not to your current portfolio value.
That design choice is the most misunderstood feature of the rule. Your withdrawals do not go up when markets soar, and they do not go down when markets crash. The dollar amount only ever tracks inflation. This is what gives the rule its consistency, and it is also what makes it unrealistic. No retiree actually spends a flat inflation-adjusted figure for three decades while watching their portfolio swing.
The rule also bakes in three assumptions that may not match your life:
| Assumption | What Bengen used | Why it might not fit you |
|---|---|---|
| Time horizon | 30 years | You might need 25 years or 40 |
| Portfolio mix | ~50% stocks / 50% bonds | Your allocation may differ significantly |
| Spending pattern | Flat inflation-adjusted | Real spending usually declines with age |
When Jeff Judge walks clients through this table, the spending row is where the lights come on. People assume they will spend the same amount at 85 that they did at 65. The data says otherwise, and that single assumption changes how much you can safely withdraw.
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Why Is Today's Environment Different From 1994?
The economic conditions that shaped Bengen's research differ from today's in three meaningful ways: bond yields, stock valuations, and life expectancy. Each one pushes the math in a slightly different direction.
How do lower bond yields affect the 4% rule?
Bond yields directly affect how much income your fixed-income holdings generate, which affects how much of your portfolio you must sell to fund withdrawals. In the mid-1990s, the 10-year Treasury yield sat well above 6%. As of 2026, the 10-year Treasury yields meaningfully less than that historical level, though it has recovered substantially from the near-zero rates of the early 2020s.
The practical effect: when bonds throw off less income, you sell more shares to hit your withdrawal number. Selling shares in a down market is exactly the trap the 4% rule was supposed to help you avoid. Higher current yields than the 2020-2021 era have actually improved the outlook compared to a few years ago, which is one reason some researchers have nudged safe withdrawal estimates back up.
How do high stock valuations change the picture?
Elevated stock valuations at the moment you retire tend to predict lower future returns, which raises sequence-of-returns risk. Sequence risk is the danger that a string of poor returns in your first few retirement years permanently damages your portfolio, even if average returns over 30 years look fine.
Two retirees can earn the identical 30-year average return and end up in completely different places based purely on the order those returns arrive. The person who hits a bad stretch early, while withdrawing, can run out. The person who hits the same bad stretch late usually survives. This is the single most important risk the 4% rule was built to address, and it is why the rule is conservative by design.
How do longer life expectancies factor in?
Bengen assumed a 30-year retirement. According to the Social Security Administration, a 65-year-old today can expect to live roughly 19 to 22 more years on average, and for a married couple the relevant number is the survival of the longer-living spouse. There is a meaningful probability that at least one member of a healthy 65-year-old couple lives past 90. For someone retiring at 60, planning for 30 years may not be enough.
A longer horizon argues for a lower withdrawal rate, all else equal. But "all else equal" rarely holds, which is why the rule should be a starting point and not the answer.
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What Does Recent Research Say About the 4% Rule?
The research has moved in both directions, and that contradiction is actually the most useful finding. Some studies say 4% is too aggressive for today; others, including Bengen's own later work, say it was too conservative all along.
Why do some researchers recommend lower rates?
Some analysts, pointing to high valuations and lower expected returns, have suggested starting withdrawal rates closer to 3% to 3.5% for portfolios beginning in a high-valuation environment. The logic is straightforward: if future returns are likely to be lower than the historical average Bengen used, the safe withdrawal rate should come down to match.
The dollar difference is not trivial. On a $1 million portfolio, 3.5% means $35,000 in year one versus $40,000 at 4%. That is $5,000 a year, every year, adjusted upward for inflation, compounding across a 30-year retirement. According to data referenced by J.P. Morgan Asset Management, small differences in withdrawal rate translate into large differences in lifetime spending and ending wealth.
Why does Bengen himself now suggest a higher rate?
This is the part that surprises people. William Bengen revisited his own work and concluded that with broader diversification, including small-cap stocks and other asset classes he did not test in 1994, the safe withdrawal rate was closer to 4.5%, and in later analysis he has cited figures approaching 4.7% to 5%. His original 4% was conservative partly because his test portfolio was narrow.
So the man who created the 4% rule does not think 4% is the right number. He thinks it was a floor produced by a limited portfolio, and that a better-diversified retiree could have spent more. Jeff Judge points to this constantly: the most famous number in retirement planning is one its own author revised upward. That should tell you how much weight to put on any single figure.
The honest summary is that there is no consensus, because the right rate depends on inputs nobody can know in advance. What the research does agree on is that flexibility matters more than the precise starting percentage.
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Why Does Spending Flexibility Beat a Fixed Rule?
Flexibility is the single most powerful lever a retiree controls, and the rigid 4% rule ignores it entirely. The rule assumes you spend the same inflation-adjusted amount whether the market is up 30% or down 30%. Real retirees do not behave that way, and that behavior gap is where most of the rule's conservatism lives.
What is a dynamic withdrawal strategy?
A dynamic withdrawal strategy adjusts your spending based on portfolio performance instead of locking in a fixed inflation-adjusted figure. In strong years you can take a little more; in weak years you trim discretionary spending until the portfolio recovers. Research on dynamic approaches consistently shows they support higher average withdrawal rates over a full retirement than the static 4% rule, because cutting back in bad years protects the portfolio when it is most vulnerable.
A common version is the "guardrails" approach: you set an upper and lower boundary around your withdrawal rate, and you only adjust spending when the rate drifts outside those guardrails. Most years, nothing changes. In a severe downturn, you make a modest cut, often 10% of discretionary spending, that dramatically improves the odds your money lasts.
How much does flexibility actually help?
The improvement is large enough to change planning entirely. A retiree willing to reduce spending temporarily during a downturn can often start at a higher withdrawal rate than 4% while maintaining the same probability of success as the rigid rule. The 4% rule is essentially the price you pay for never wanting to adjust. Most people are far more flexible than they assume, especially with discretionary categories like travel, dining, and gifting.
This is where Chesapeake Financial Planners applies the R.U.D.D.E.R. Method™, the firm's six-step planning process: Review and Recognize, Uncover and Understand, Design and Develop, Discuss and Decide, Execute and Empower, and Reassess and Refine. The "Reassess and Refine" step is exactly what dynamic withdrawal demands. You are not setting a number once and walking away. You are revisiting it as markets and life evolve.
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What Personal Factors Matter More Than the Rule?
Four personal factors usually move the safe withdrawal rate more than any general guideline: your real timeline, your spending flexibility, your guaranteed income, and your risk tolerance. The 4% rule treats every retiree as identical. You are not.
Your actual timeline
Your real time horizon, not the textbook 30 years, drives how much you can withdraw. If you retire at 70 with a family history of shorter lifespans, 4% may be needlessly cautious; you might be leaving years of enjoyment on the table to protect against a 35-year retirement you will not have. If you retire at 58 in excellent health, you may need to plan for 40 years, which argues for a lower starting rate. Match the horizon to your life, not to a paper from 1994.
Your spending flexibility
Your ability to trim spending in a downturn is one of the strongest predictors of plan success. Ask the practical questions: Which expenses are essential and which are discretionary? Will a mortgage be paid off in five years, lowering your baseline? Could you generate part-time income if needed? A retiree with high fixed costs and no slack needs a more conservative rate than one with the same portfolio and lots of discretionary cushion.
Your other income sources
Guaranteed income from Social Security and pensions creates a floor that fundamentally changes the withdrawal math. According to the Social Security Administration, Social Security benefits are adjusted annually through a cost-of-living adjustment, providing inflation-linked guaranteed income most retirees will receive for life. If your guaranteed income covers your essential expenses, your portfolio only has to fund discretionary spending, which can safely support a higher withdrawal rate. This is one of the most overlooked points in the entire 4% debate.
Your risk tolerance
The 4% rule is calibrated to survive essentially every historical worst case, and that certainty has a cost: lower lifetime spending. If you are comfortable accepting a slightly higher chance of needing to adjust, you can often spend more. There is no free lunch here. Higher spending means higher risk. The right answer is the one that lets you sleep, not the one that maximizes a spreadsheet.
In Jeff's experience with pre-retirees across Harford County, the people who struggle most are not the ones with too little money. They are the ones who never decided how flexible they were willing to be, so they default to the most conservative rule and quietly resent their own retirement.
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What Is a Better Framework Than a Rigid Withdrawal Rule?
A better framework treats the 4% rule as a baseline reference and then builds flexibility, guaranteed income, and regular review around it. The rule is a useful sanity check. It is a terrible autopilot.
Here is the approach Chesapeake Financial Planners uses with retirement income clients:
- Start with 4% as a reference point, not a rule. Use it to gut-check whether your savings are roughly in the range needed for your desired spending. If your number requires a 6% withdrawal rate, you have a planning problem to solve before retirement, not a withdrawal rate to argue about.
- Separate essential from discretionary spending. Map which expenses you must cover no matter what, and which you could trim in a bad year. This single exercise reveals how much flexibility you actually have, and flexibility is what lets you safely spend more.
- Match guaranteed income to essential expenses where possible. If Social Security and any pension cover your must-pay costs, your portfolio is funding the fun, and a downturn becomes uncomfortable rather than dangerous. Coordinating when to claim Social Security is a major lever here.
- Plan to adjust annually using guardrails. Decide in advance what triggers a spending cut and what triggers a raise. Deciding the rules while you are calm beats reacting emotionally during a crash.
- Account for the spending decline that usually comes with age. Spending often falls in real terms through the 70s and 80s, healthcare aside. A plan that assumes flat spending for 30 years is planning for a retiree who does not exist.
- Revisit the plan every year. Markets change, tax law changes, and your life changes. The withdrawal rate you set at 65 is not the one you should defend at 75 without looking.
Notice what this framework does. It takes the one rigid number everyone fixates on and surrounds it with the things that actually determine success. The 4% rule answers one narrow question. A real plan answers the question behind the question: how do I turn this pile of assets into a paycheck I can trust?
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How Does Chesapeake Financial Planners Approach Retirement Income?
We start with your life, not with a percentage. Before we talk about withdrawal rates, we map your essential expenses, your guaranteed income, your real time horizon, and how much flexibility you genuinely have. Only then does a withdrawal rate mean anything.
Chesapeake Financial Planners is a fee-based financial planning firm in Forest Hill, Maryland that helps business owners, pre-retirees, and people navigating major financial transitions make data-driven decisions. For retirement income specifically, that means coordinating your portfolio withdrawals with Social Security timing, tax planning, and required minimum distributions so the pieces work together instead of fighting each other.
The 4% rule is one input. A good retirement income plan is the whole system. If you are within a few years of retirement, or already there and unsure whether you are spending too little or too much, that is exactly the question worth answering with real numbers.
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Frequently Asked Questions
What is the 4% rule in retirement?
The 4% rule is a retirement withdrawal guideline that says you can withdraw 4% of your portfolio balance in your first year of retirement, then adjust that dollar amount for inflation each year afterward, and reasonably expect your money to last about 30 years. It was created by financial planner William Bengen in 1994 based on historical U.S. market returns.
Does the 4% rule still work in 2026?
The 4% rule still works as a reasonable starting point for most retirees in 2026, but it should not be followed rigidly. Lower expected returns and longer lifespans argue for caution, while higher current bond yields and the flexibility most retirees actually have argue that 4% may even be conservative. Treat it as a baseline, not a guarantee.
How much can I withdraw if I have $1 million saved?
Under the 4% rule, a $1 million portfolio supports a $40,000 first-year withdrawal, adjusted upward for inflation each year after. At a more conservative 3.5%, that drops to $35,000, and at a higher 4.5% rate it rises to $45,000. The right number depends on your time horizon, your guaranteed income, and your willingness to adjust spending in down years.
Is the 4% rule too conservative or too aggressive?
It can be either, depending on your situation. For a retiree with strong Social Security and pension income who is willing to trim spending in bad years, 4% is often too conservative. For someone retiring early with a 40-year horizon and high fixed expenses, 4% can be too aggressive. The rule's one-size-fits-all design is exactly why it fits almost no one perfectly.
What withdrawal rate does William Bengen recommend now?
William Bengen, who created the 4% rule, later revised his own estimate upward. With a more diversified portfolio that includes asset classes he did not originally test, such as small-cap stocks, he has cited safe withdrawal rates closer to 4.5% and in some analysis approaching 4.7% to 5%. His original 4% reflected a narrower portfolio and was conservative by design.
How does Social Security change the 4% rule?
Social Security changes the math significantly because it provides guaranteed, inflation-adjusted income for life. If your Social Security benefit and any pension cover your essential expenses, your portfolio only needs to fund discretionary spending, which can safely support a higher withdrawal rate. Coordinating when you claim Social Security is one of the most powerful levers in a retirement income plan.
What is a dynamic withdrawal strategy?
A dynamic withdrawal strategy adjusts your annual spending based on portfolio performance rather than locking in a fixed inflation-adjusted amount. Many versions use guardrails: you set upper and lower limits and only change spending when your withdrawal rate drifts outside them. This approach typically supports higher average withdrawals than the rigid 4% rule because cutting back in down years protects the portfolio when it matters most.
Where Does This Leave You?
The 4% rule is a starting line, not a finish line. If you take one thing from this guide, make it this: the rule that survives the worst case will, by design, leave most people either underspending out of fear or following advice built for a different era. Your timeline, your guaranteed income, and your flexibility determine far more than the difference between 3.5% and 4.5%.
If you want to know what your actual safe withdrawal rate is, with your numbers instead of a 1994 assumption, our retirement income guide walks through the framework step by step. Download it at chesapeakefp.com and start with the question that really matters: how do I turn what I've saved into a paycheck I can count on?
Want to go deeper? Our Retirement Income Blueprint Workbook walks through this step by step.
Investing involves risk including loss of principal. No strategy assures success or protects against loss. Past performance is no guarantee of future results. The hypothetical examples shown are for illustrative purposes only and are not representative of any specific investment or guarantee of future results.
Disclosures
The information provided is for educational purposes only and should not be construed as investment advice. Investment strategies should be tailored to individual circumstances, risk tolerance, and goals. Past performance doesn't guarantee future results. Consult with qualified financial professionals regarding your specific situation.
Advisors associated with Chesapeake Financial Planners may be either (1) LPL Financial Registered Representatives offering securities through LPL Financial, Member FINRA and SIPC, and investment advisor representatives offering investment advice through Great Valley Advisor Group; or (2) solely investment advisor representatives offering investment advice through Great Valley Advisor Group and not affiliated with LPL Financial. Great Valley Advisor Group, and Chesapeake Financial Planners are separate entities from LPL Financial.
