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Accounts · Lots of talk

4% rule

Also called four percent rule · safe withdrawal rate · SWR · Trinity study · FIRE withdrawal

Community talk. May contain inaccuracies. Not financial, tax, legal, or investment advice. No return or outcome is promised.

The 4% rule estimates retirement spending from investments: withdraw 4% of the starting portfolio in the first year, then adjust that dollar amount for inflation. People use it to sketch a savings target and a retirement budget. It comes from historical research, so it cannot guarantee a future paycheck.

Journal of Financial Planning · 1994

01

How the spending calculation works

Use the investments that will fund spending. Count investable assets, excluding an unsold home. The classic research used U.S. stocks and bonds, rather than a savings account or dividends alone.

Charles Schwab · 2026

$800,000 produces a $32,000 first-year example. Multiply the starting balance by 0.04. With an assumed 3% inflation adjustment, the following year's withdrawal becomes $32,960, even if markets fall. Taking 4% of each new balance instead would make spending fluctuate with the portfolio; that is a different method.

Journal of Financial Planning · 1994
Two withdrawal rules can diverge in year two

Both examples start with $800,000 and a $32,000 first withdrawal. Now assume the balance before the second withdrawal is $700,000, with all first-year activity already included, and inflation is 3%.

Year-two arithmetic under different rules
RuleCalculationWithdrawal
Adjust last year’s dollars$32,000 × 1.03$32,960
Take 4% of the new balance$700,000 × 0.04$28,000

The first rule changes with inflation; the second changes with the portfolio balance. Neither calculation by itself establishes that the spending can last.

The $700,000 balance is a hypothetical comparison input, not an investment forecast. This demonstrates the rule distinction, not a recommended withdrawal rate; taxes, fees and sustainability remain separate.

Compare that amount with the gap after other income. For illustration, $52,000 of costs minus $20,000 of pension income leaves $32,000 for investments to cover. Social Security starting later requires an earlier-year budget. Income reduces the gap, not the portfolio being multiplied.

Charles Schwab · 2026

A withdrawal policy needs a review process. Monthly transfers can draw on portfolio income and sales. The plan specifies how holdings stay balanced, when spending is reviewed, and what changes after a downturn or major life event.

Charles Schwab · 2026

02

Why people use it

25 times the annual portfolio need gives a rough target. Dividing $32,000 by 4% gives $800,000. This links spending and savings, but reaching that number alone does not settle retirement readiness.

Charles Schwab · 2026

It tests a spending path through difficult markets. Bengen's work examined bad historical starts rather than relying on average returns. This helps explain why a withdrawal rate is different from an expected investment return, and why a few strong years do not settle the plan.

Journal of Financial Planning · 1994

03

Good to know

Bad early returns and inflation can compound the damage. Selling investments while prices are down leaves less money participating in a recovery. Rising withdrawals add pressure. This is sequence-of-returns risk: the order of good and bad years matters when money is leaving the account.

Journal of Financial Planning · 1994

A 50-year retirement needs its own assumptions. The familiar benchmark targets at least 30 years, not perpetual income. Morningstar's December 2025 model estimated 3.9% for 30 years and 3.3% for 40 years, at 90% modeled success. These are estimates under that study's assumptions, not personal safe rates.

Morningstar · 2025

The withdrawal is before taxes and fees. Paying them reduces money available for living costs. Healthcare and large occasional expenses also need budget space. The percentage does not calculate those bills.

Charles Schwab · 2026

Account access is a separate check. U.S. taxable retirement-plan withdrawals before 59½ generally face an additional 10% tax. Exceptions depend on account and circumstances, not the 4% calculation.

IRS · current rules checked 29 Sept 2026

An updated percentage comes with changed assumptions. Bengen now describes expanded research behind a 4.7% figure and techniques reaching 5%. His website promotes his book. Those figures do not turn every portfolio into a larger paycheck; the original method, investment mix and future uncertainty still matter.

Bill Bengen · current website

04

From community discussion

A pickup purchase pushed one retiree above their target. A Reddit commenter reported about 4.35% after buying a truck, versus a 4.25% goal, while still working roughly ten hours a week. They described stress and aimed for 3.5% normal expenses, leaving room for travel and house costs.

Community · Reddit

A lower withdrawal brought another retiree peace of mind. A commenter who retired at 52 without family financial backup waited for 3%. They reported 2.27% later after deferred compensation, market gains and skipping inflation increases. That combination matters; the lower rate was not solely an investing result.

Community · Reddit

Early-retirement discussions compare 3–3.5%, 4% and higher starts. The debate includes 3.3%, 5% or more, and guardrails: prewritten spending changes when the portfolio crosses limits. Lower starts require more savings for the same budget; flexible rules may require real spending cuts. None is a universal guarantee.

Community

A cash buffer makes crash-year spending feel more manageable. Discussion describes savings or maturing Treasury bills for near-term spending instead of an immediate stock sale. The buffer is still part of the overall plan; it cannot erase market risk or make an all-cash portfolio equivalent to the research.

Community

A paid-off mortgage and later income change the budget. Reports include pensions, Social Security, rental or part-time income, and healthcare costs before leaving work. People revisit the estimate after a house, job or family change and seek tax or planning help when the decision becomes concrete.

Community

The first savings target can bring relief or discouragement. The discussion separates that feeling from whether tracked spending is funded. Workplace benefits, debt and accessible reserves still matter while saving. Peer comparisons and daily withdrawal-rate posts do not answer the household's cash-flow question.

Community

Readers disagree about whether recent crashes broke the benchmark. The Mr. Money Mustache thread shared Bengen and Trinity papers. Replies questioned whether 2021–2022 undermined the pattern; another disagreed. The exchange records a debate, not a completed withdrawal test.

Community

Creator posts may mix observed history with projected years. Bengen's LinkedIn post discussed retirements beginning in 2000 and 2007, but filled later years with assumed returns and inflation. Those projections cannot establish that a full retirement already succeeded. The post also promotes his book.

Community · LinkedIn

References for this topic

Sources and context

  1. 4% SWR in retirement with mortgage ↗

    id
    money-wave-withdrawal-talk — 4% SWR in retirement with mortgage
    role
    Community discussion
    accessed On
    2026-09-23
    locator
    joetaxpayer question; DiceyScientist staged cash-flow reply; contrasting mortgage treatment replies.
    scope
    Participants model the years before and after mortgage payoff, Medicare and Social Security separately; they do not agree on one mortgage treatment.
    limitations
    Selected self-reported public posts and replies, not verified outcomes, a representative sample, a prevalence estimate, or financial/legal proof. No private account material or linked financial screenshots accessed.

  2. Revisiting William Bengen's SAFEMAX Portfolio Withdrawal Rate ↗

    id
    money-guide-four-percent-fpa-bengen — Revisiting William Bengen's SAFEMAX Portfolio Withdrawal Rate
    platform
    Financial Planning Association
    role
    Professional context
    accessed On
    2026-09-24
    locator
    November 2023 Journal of Financial Planning article; Literature Review and the 1973-2022 SAFEMAX results
    scope
    Bengen's 1994 test used 1926-1992 data, a 50/50 large-cap and intermediate Treasury mix, annual rebalancing, inflation-adjusted withdrawals, and a 30-year horizon. The article states the original SAFEMAX at 4.0 percent, later Bengen figures of 4.3 and 4.5 percent, and a 1973-2022 rerun from 4.2 to 4.9 percent. Bengen did not call the result the 4 percent rule.
    limitations
    These are historical study results. The article does not promise a future portfolio result, a tax estimate, or a withdrawal for a retirement longer than 30 years.
    slugs
    • four-percent-rule

  3. Determining Withdrawal Rates Using Historical Data ↗

    id
    money59-four-percent-rule-bengen-paper — Determining Withdrawal Rates Using Historical Data
    platform
    Financial Planning Association / Journal of Financial Planning
    role
    Professional context
    accessed On
    2026-09-29
    published Or Updated
    1994-10
    locator
    13-page FPA reprint, PDF pages 2–6 and 11–12; Strategies and Applications, Initial Asset Allocation and Conclusions
    scope
    Historical withdrawal method and bad-start reasoning; charts extend to 50 years, although the 4% benchmark targets at least 30.
    limitations
    Historical U.S. investment experience, not a forecast or individualized advice. URL and wrapper are a later reprint, not a 2004 original study.
    slugs
    • four-percent-rule

  4. The 4% Rule: How Much Can You Spend in Retirement? ↗

    id
    money59-four-percent-rule-schwab — The 4% Rule: How Much Can You Spend in Retirement?
    platform
    Charles Schwab
    role
    Professional context
    accessed On
    2026-09-29
    locator
    How the 4% retirement rule works; five assumptions; additional items; explicit 2026 return-assumption disclosure
    scope
    Investable portfolio, gross withdrawals, other-income spending gap, total-return funding and ongoing review.
    limitations
    Brokerage education, not neutral product comparison. Its text, image and table display conflicting projected rate ranges; none of those ranges is used. No exact publication date verified.
    slugs
    • four-percent-rule

  5. The State of Retirement Income: 2025 ↗

    id
    money59-four-percent-rule-morningstar-2025 — The State of Retirement Income: 2025
    platform
    Morningstar
    role
    Professional context
    accessed On
    2026-09-29
    published Or Updated
    2025-12-03
    locator
    PDF page 1 Key Takeaways; pages 50–51 How to Use This Research and Exhibit 34, data as of September 30, 2025
    scope
    Horizon-dependent model estimates under fixed inflation-adjusted spending and 90% modeled success.
    limitations
    Forward-looking assumptions, not a personal probability or guarantee. Nonportfolio income excluded from base-case calculation. The 2025 title is retained; no invented 2026 annual report.
    slugs
    • four-percent-rule

  6. Retirement topics – Exceptions to tax on early distributions ↗

    id
    money59-four-percent-rule-irs-access — Retirement topics – Exceptions to tax on early distributions
    platform
    Internal Revenue Service
    role
    Official context
    accessed On
    2026-09-29
    locator
    Intro, age row, account-specific exception columns and footnotes
    scope
    U.S. federal retirement-account early-distribution tax and account-specific exceptions; current page inspected in 2026.
    limitations
    General rule only. SIMPLE early-participation and governmental 457 rules differ; taxable portion and exception eligibility matter. No state-law or individual determination.
    slugs
    • four-percent-rule

  7. The 4% Rule ↗

    id
    money59-four-percent-rule-bengen-website — The 4% Rule
    platform
    Bill Bengen's website
    role
    Professional context
    accessed On
    2026-09-29
    locator
    Creator essay, later-research paragraph and site disclaimer
    scope
    Creator's account of the shorthand and subsequent expanded research.
    limitations
    Book promotion and educational commentary. No publication date verified; copyright footer is not a publication date. Higher figures remain the author's research claims, not a recommendation.
    slugs
    • four-percent-rule

  8. who is actually living the 4% rule? ↗

    id
    money59-four-percent-rule-reddit-experiences — who is actually living the 4% rule?
    platform
    Reddit / r/financialindependence
    role
    Community discussion
    accessed On
    2026-09-29
    locator
    Comments by Cress_Solid and Emily4571962, with surrounding spending and flexibility replies
    scope
    Self-reported truck spending, part-time work, lower-rate retirement decision and later income/market changes.
    limitations
    Anonymous accounts are unverified and not representative. Visible timestamps were relative; exact posting dates not verified. Thread contains unsupported high-rate claims which are not adopted.
    slugs
    • four-percent-rule

  9. Has the 4.7% rule already been broken? ↗

    id
    money59-four-percent-rule-bengen-linkedin — Has the 4.7% rule already been broken?
    platform
    LinkedIn / William Bengen
    role
    Community discussion
    accessed On
    2026-09-29
    locator
    Public post body: 2000 and 2007 retirement examples; assumptions for later years; two visible replies
    scope
    Original creator's social discussion distinguishing observed returns through 2024 from extrapolated later years.
    limitations
    Promotes the author's book; projected outcomes are not observed full-period success. Relative timestamp only; no exact original date verified. Only public replies inspected.
    slugs
    • four-percent-rule

  10. Determining Withdrawal Rates Using Historical Data — William P. Bengen ↗

    id
    money-wave-bengen — Determining Withdrawal Rates Using Historical Data — William P. Bengen
    role
    Official context
    accessed On
    2026-09-23
    locator
    1994 paper, March 2004 reprint; portfolio scenarios and percentage of initial portfolio value.
    scope
    The historical exercise concerns an investment portfolio and inflation-adjusted withdrawals, not total household net worth or a guaranteed future return.
    limitations
    Primary context for the named narrow claim; does not determine an individual account, eligibility or outcome.

Keep this topic in view

Preserved original record

Earlier public profile and reader notes are preserved separately from the current article. They may contain superseded wording and are not newly checked material.

Read the full original profile
slug
four-percent-rule
name
4% rule
aliases
  • four percent rule
  • safe withdrawal rate
  • SWR
  • Trinity study
  • FIRE withdrawal
family
accounts
heat
high
talk
Lots of talk
most Discussed
false
first Line
The 4% rule is a retirement-withdrawal rule of thumb: withdraw 4% of the starting investment portfolio in year one, then adjust that dollar amount for inflation in the classic approach.
why Line
Discussions test that starting point against retirement length, taxes, bad early market years and spending that changes when a mortgage ends or other income begins.
feel Words
  • 4% rule
  • safe withdrawal
  • trinity study
  • FIRE number
common Picture
  • lead
    The portfolio funds a spending gap
    why
    Expected spending minus other income is different from total net worth. [community]
  • lead
    The classic horizon is about 30 years
    why
    Early retirement may require a longer period than the historical examples. [community]
  • lead
    A different percentage is a different assumption
    why
    Forum examples from 3–3.5% to 5% or more are not interchangeable guarantees. [community]
watch For
Treating 4% as a sure paycheck. Ignoring Social Security, pensions, or a 50-year retirement. Spending 8% because a YouTuber “updated” it.
what People Say
  • The job: a crude “can I retire” napkin, not a pension. [community]
  • The research names: William Bengen and the Trinity study are historical retirement-withdrawal references people cite when discussing this rule of thumb. They are not promises about a future retiree’s result. [trial]
  • r/financialindependence debates: starting rates such as 3.3% or 4% are compared with “guardrails,” which allow spending changes when the portfolio moves outside planned bounds. [community]
  • Why it is useful: it is a starting sentence. [community]
  • Why it is dangerous: people treat a historical survival rate as a sure thing. [community]
  • Sequence of returns: a bad first decade can wreck a rigid 4%. That is the adult caveat. [community]
  • Feeling behind and calculating withdrawals are different questions: a peer comparison cannot establish whether a particular portfolio can fund a household’s spending. [community]
  • Social Security, a paid house, a pension change the napkin. They belong on it. [community]
  • A longer early retirement changes the question: stopping work at 40 and funding 50 years is different from the classic 30-year horizon. Early-retirement discussions often model a lower first-year withdrawal percentage, without proving a universally safe rate. [community]
  • Taxes and fees come off the 4%, or they did the math wrong. [community]
  • Not investment advice. History is not a contract. [community]
how People Run It
  • Identify the investment portfolio funding withdrawals. Total net worth may include a home or other assets that do not supply spendable cash. [community]
  • Apply a trial initial withdrawal rate to that portfolio. In the classic 4% framing, later withdrawals follow an inflation-adjusted dollar amount; taking 4% of each new balance is a different rule. [community]
  • Compare withdrawals with the spending gap. Expected spending minus other income is the amount the portfolio would need to cover; other income is not subtracted from the portfolio’s calculated withdrawal amount. [community]
  • They plan a flexible spend — guardrails, variable percentage — if they actually retire. [community]
  • They do not sell a crash month just to hit a rigid 4% that year without looking. [community]
  • A tax person / planner if the number is real enough to quit. [community]
  • They re-run the napkin after a job change, a house, a kid. [community]
amounts People Use
  • Classic talk: 4% of the starting portfolio in year one. [community]
  • More conservative early-retirement examples: 3–3.5% initial withdrawals appear in the discussions; the lower figure is an assumption, not a guarantee. [community]
  • Aggressive YouTube: 5%+ — treated as spicy, not default, in boring rooms. [community]
  • Portfolio: often a stock/bond mix in the studies, not 100% cash. [community]
  • Horizon: the classic discussion uses about 30 years; people planning a longer retirement often test lower percentages and different spending paths. [community]
how People Keep It
  • A written spending number they can live, not a fantasy travel montage. [community]
  • Cash buffer so they are not forced sellers every January. [community]
  • They revisit after big life changes. [community]
  • They avoid rebuilding the plan around every safe-withdrawal-rate post: a new percentage needs its assumptions and retirement horizon understood. [community]
  • Healthcare is on the plan, not “4% includes vibes.” [community]
how It Feels
  • The first 25-times-expenses estimate can bring relief or despair: the emotional reaction to the target is separate from checking whether its spending and time-horizon assumptions fit. [community]
  • A bull market: 4% feels too small. They get sloppy. [community]
  • A bear year one: 4% feels like a cliff. Sequence risk stops being abstract. [community]
  • If they never track spending: the % is a toy. [community]
  • If they confuse 4% with “I need 4% returns”: they mixed accumulation and withdrawal. [community]
  • Done honestly: it is a planning sentence, not an identity. [community]
how Long People Run It
  • As a planning tool for years before they retire. [community]
  • In retirement: a policy they can change, not a blood oath. [community]
  • During the saving years: workplace benefits, debt and accessible reserves still matter alongside a distant retirement estimate. The withdrawal rule does not settle those present-day priorities. [community]
  • They update when markets, health, or family change the clock. [community]
deep Dive
  • Start with spending rather than peer comparison: the useful question is how much the portfolio must supply after other income. Feeling ahead or behind someone else does not change that household cash-flow gap. [community]
  • Portfolio mix is a separate assumption: a three-fund approach combines broad U.S. stocks, international stocks and bonds. Naming the funds alone does not establish a sustainable withdrawal amount or eliminate market risk. [community]
  • Saving and withdrawing are different phases: an employer match can help build retirement assets while working. The 4% discussion asks how assets may support spending later. [community]
  • A cash buffer has an access role: savings or maturing Treasury bills can cover near-term withdrawals, while the wider stock/bond portfolio serves the longer horizon. Cash does not remove the need to test the spending plan. [community]
  • Trinity / Bengen are US historical. Other countries, other fees, other outcomes. [trial]
watch For Long
  • 4% is not a sure paycheck from history. [community]
  • Retiring at 35 on a 30-year study. [community]
  • Ignoring taxes, fees, health insurance. [community]
  • Spending 8% because a thumbnail said so. [community]
  • This is not advice to quit a job. [community]
related
  • am-i-behind
  • three-fund
  • the-match
  • full-emergency-fund
  • taxable-brokerage
research Pointer
    house Pointers
      play Pointer
      —
      sources
      • Bengen / Trinity withdrawal studies as cited in FI rooms
      • r/financialindependence SWR fights
      • Bogleheads withdrawal wiki talk
      disclaimer
      Community talk may be wrong. Not financial, tax, legal, or investment advice. No return or outcome is promised.
      quick Answer History
      • field
        commonPicture
        rows
        • lead
          Endless argument
          why
          3% vs 4% vs 5% is the sport. [community]
      • field
        definition
        rows
        • The 4% rule is a retirement-withdrawal guideline that starts with 4% of the initial portfolio in the first year, then adjusts that withdrawal amount for inflation in later years.
      • field
        communityPicture
        rows
        • People discuss retirement length, spending flexibility, other income and how historical calculations differ from a guaranteed paycheck.
      • field
        howPeopleRunIt
        rows
        • Get a net-worth number that is actually theirs (not a Twitter flex). [community]
        • Multiply by 0.03–0.04 as a range, not a destiny. [community]
        • Subtract known other income (SS later, rental, part-time) instead of pretending 4% must buy the whole life. [community]
      • field
        firstLine
        rows
        • The 4% rule is a retirement-withdrawal story from old portfolio research — take about 4% in year one, adjust, argue forever.
      • field
        whyLine
        rows
        • The 4% rule is a retirement-withdrawal story from old portfolio research — take about 4% in year one, adjust, argue forever.
      • field
        commonPicture
        rows
        • lead
          Year-one spend ≈ 4% of portfolio
          why
          The napkin. [community]
        • lead
          Then inflation adjustments in the original story
          why
          Not a vibe raise. [community]
        • lead
          Stocks + bonds history
          why
          US-heavy in the famous papers. [community]
        • lead
          About 30 years in the classic Trinity framing
          why
          FIRE at 35 is a longer clock. [community]
        • lead
          Other withdrawal talk: 3–3.5%, or 5% and above
          why
          More conservative and more aggressive forum variants are distinct from the classic 4% example. [community]
      • field
        whatPeopleSay
        rows
        • Trinity study / Bengen are the names people paste. [trial]
        • r/financialindependence lives here. 2026 still fights 3.3% vs 4% vs Guardrails. [community]
        • Am I behind? is a feelings card. This is the withdrawal-math card. [community]
        • Early FIRE (retire at 40 for 50 years) is not the 30-year study. They often use a lower first-year % in those threads. [community]
      • field
        howPeopleKeepIt
        rows
        • They ignore daily SWR TikTok. [community]
      • field
        howLongPeopleRunIt
        rows
        • Not a 22-year-old’s only money card. Match and HYSA still go first. [community]
      • field
        deepDive
        rows
        • Am I behind? is the feeling. This is one napkin. [community]
        • Three-fund is how many people invest toward a number. [community]
        • The match is still the first accumulation dollar. [community]
        • HYSA / T-bills are the cash buffer next to a withdrawal plan. [community]
      • field
        amountsPeopleUse
        rows
        • Conservative FIRE talk: 3–3.5%. [community]
        • Horizon: classic ~30 years; longer FIRE clocks use lower % in the same threads. [community]
      • field
        howItFeels
        rows
        • First 25× expenses math: either relief or despair. That is the Am-I-behind cousin. [community]
      Read the preserved reader notes
      definition
      The 4% rule is a retirement-withdrawal rule of thumb: withdraw 4% of the starting investment portfolio in year one, then adjust that dollar amount for inflation in the classic approach.
      community Picture
      Discussions test that starting point against retirement length, taxes, bad early market years and spending that changes when a mortgage ends or other income begins.
      additions
      • text
        A selected r/Fire discussion about a mortgage ending several years into retirement produced several approaches: count payments in early spending, reserve a separate amount, or model a payoff. One participant laid out different phases for mortgage payoff, Medicare and Social Security. The disagreement shows why a single percentage does not describe every year’s cash need; none of these reported approaches establishes a safe rate for another household.
        sources
      guide
      what
      • The moving part is an initial dollar withdrawal that later years adjust for inflation, not a fresh 4 percent of whatever the account is worth each January. The Financial Planning Association's November 2023 journal article describes William Bengen's 1994 paper in the Journal of Financial Planning. He tested historical returns from 1926 through 1992 on a portfolio split evenly between U.S. large-cap stocks and intermediate-term Treasuries, rebalanced once a year. He looked for the highest initial withdrawal that would have lasted at least 30 years in the worst historical case. He called that rate SAFEMAX. For that original portfolio and test, the article says the rate was 4.0 percent. The nickname came later. Bengen did not use it.
      • In that method, the first-year withdrawal is the chosen percent times the portfolio's starting value. Each later year, that dollar amount, not the percent, is adjusted for inflation. Taking 4 percent of the new balance every year is a different rule. It cuts the withdrawal after a decline and raises it after a gain. The 1994 method, as the article describes it, does not do that.
      • The same article says later Bengen work put the initial SAFEMAX at 4.3 percent in 1997 and 4.5 percent in 2006 under different stock mixes. A 1973-through-2022 rerun with a bond-market index, instead of Treasury yields, produced worst-case initial rates from 4.2 percent to 4.9 percent depending on the mix. Those are results inside the historical tests. They are not a payment a later market owes a retiree.
      how
      • Write down the account that would actually be sold in order to spend. A home that is not being sold is not part of that starting balance. Multiply the starting balance by the trial rate. At the original 4.0 percent figure, the first-year withdrawal is 4.0 percent of that starting balance. Divide by 12 only when the question is a monthly transfer of that same annual amount. In later years, increase the prior year's dollar amount by the inflation measure the plan is using. Do not compute 4 percent of the new market value and call it the same rule.
      • Write the spending gap on a second line. Expected spending minus Social Security, a pension, or other income is the amount the portfolio would have to supply. That other income is not subtracted from the portfolio before the percent is applied. If the inflation-adjusted withdrawal is larger than the gap, the napkin is withdrawing more than the spending plan. If it is smaller, this rule is not covering the gap. Taxes, fees, and health insurance belong in the spending figure or in the withdrawal. The 1994 test, as the article describes it, does not calculate a personal tax bill.
      • A horizon longer than about 30 years is outside the original test. The article's later rerun also used 30-year cohorts. A different percent, or a rule that changes the dollar amount when the portfolio rises or falls, is a different assumption. The article says that letting withdrawals fall in a bad market can change how long a portfolio lasts in these historical tests, and that the fixed inflation-adjusted path does not do that.
      • Run the arithmetic again after a job change, a house purchase, or a new pension. The worksheet is a scenario. It does not, by itself, say that leaving a job is funded. The account statement shows the balance that was multiplied. A tax projection, if one is prepared, shows the spending figure the withdrawal has to cover.
      understand
      • The method uses the worst stretch in the historical window, not an average year, because a retirement that starts into poor returns and high inflation has to take rising dollars from a portfolio that has already shrunk. The 2023 article points to the 1973 cohort as that kind of case in its later test. A strong first decade is not evidence that the initial rate was too cautious. The rate was chosen against the bad start.
      • The common miss is treating 4 percent as a paycheck the past guarantees, or spending a higher percent because a later chart showed a higher SAFEMAX under a different portfolio. The original 4.0 percent figure and the later 4.2 to 4.9 percent figures come from different data and different mixes. None of them includes a specific household's taxes, fees, or a retirement longer than the 30 years that were tested. A pile of cash is not the stock-and-bond mix those papers tested.
      • Community notes argue over lower starting rates, longer retirements, and guardrails that change spending when the balance moves. Those are reported variations. They are not the 1994 SAFEMAX. The check outside the historical study is the account statement and a tax projection for that household.
      sources
      summary Sources
      note References
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      End of 4% rule