The 4% Withdrawal Rule Is Broken: What Retirees Are Using Instead

Fact-checked by the The Credit Scout editorial team

The standard retirement withdrawal strategy most Americans learned, withdraw 4% of your portfolio in year one, then adjust for inflation every year after, was never designed to be a universal rule. Bill Bengen’s original 1994 heuristic was built on a specific 50/50 stock-bond portfolio over a strict 30-year horizon, and even he has since revised his figure upward. According to Morningstar’s ongoing withdrawal rate research, their annual safe withdrawal estimate has moved from 3.3% in 2021 to 3.9% in 2025, using forward-looking return forecasts rather than historical averages alone.

The stakes are real. Allianz Life’s 2025 Annual Retirement Study found that 64% of Americans worry more about outliving their money than dying. Choosing the right withdrawal framework, and knowing its honest tradeoffs, is one of the most consequential financial decisions a retiree faces.

Why the 4% Rule Was Never Actually a Rule

The 4% rule began as a planning heuristic, not a prescription, and its built-in assumptions disqualify it for most modern retirees. Bengen’s 1994 paper tested a 50/50 stock-bond portfolio over exactly 30 years with inflation-adjusted withdrawals that never flexed, regardless of what markets did. Violate any one of those three conditions and the math changes materially.

Bengen himself has moved beyond the original number. In updated research, he revised his safe withdrawal figure to 4.7% when retirees diversify beyond large-cap stocks into small-cap equities and other asset classes, a fact that rarely surfaces in mainstream coverage still debating whether “4% is dead.” His position is that retirees who stick rigidly to the original figure may actually be leaving real spending power on the table.

The honest concession here matters: the 4% rule is not broken so much as it was always a starting point being used as a finish line. Retirees who treat the original figure as a permanent annual entitlement, regardless of market conditions or portfolio size, are misapplying a tool that was always meant to be reviewed and adjusted.

If you are still building toward retirement, articles like our guide on how to start building a retirement fund in your 40s cover the accumulation side of this equation in detail.

Why Sequence of Returns Risk Matters More Than Your Average Return

The single biggest threat to a retirement portfolio is not a low average return, it is the order in which returns arrive. Two retirees can hold identical portfolios with identical average returns over 20 years and end up with wildly different financial outcomes based purely on whether the losses came early or late.

The math is counterintuitive but concrete. A retiree starting with $1 million, withdrawing $50,000 per year, who experiences strong returns in the early years can finish 30 years later with over $3 million. The same retiree with the same average return but negative years at the start can see the portfolio depleted well before the 30-year mark, a gap of hundreds of thousands of dollars driven entirely by timing, not strategy or savings rate.

Bengen put the underlying mechanism plainly:

The first five to ten years of retirement are the critical danger window. A retiree who left work in early 2022 walked into simultaneous equity losses of roughly 20% and inflation running at 9.1%, a double squeeze that a rigid fixed-withdrawal plan could not absorb without permanently impairing the portfolio. This is precisely why flexible withdrawal frameworks have gained traction among financial planners since then.

Morningstar’s own simulations found that approximately 45% of Americans who retire at age 65 will run out of money during retirement, factoring in health changes, longevity, and long-term care costs. Sequence risk is a primary driver of that outcome.

The Guardrails Strategy: The Leading Alternative Retirees Are Using

The guardrails method, developed by financial planners Jonathan Guyton and William Klinger in 2006, is the most widely adopted flexible alternative to a fixed withdrawal rate. It allows a higher starting withdrawal rate precisely because it builds in pre-committed adjustment rules for both up and down markets.

The framework works like this: a retiree selects a target withdrawal rate (for example, 5%) and defines an upper guardrail (say, 6%) and a lower guardrail (say, 4%). If strong portfolio growth pushes the current withdrawal rate below the lower guardrail, the retiree increases spending by 10%. If a down market pushes the rate above the upper guardrail, spending is cut by 10%. These are not panic reactions, they are pre-committed rules that remove emotion from the decision.

The Real Tradeoff Most Articles Skip

Guardrails allow a higher starting rate, but they carry a concrete cost that competing articles almost never surface. Morningstar’s February 2026 analysis by Amy C. Arnott, CFA, found that the probability-based guardrails method ended 30-year simulations with a median portfolio balance of only $230,000. Conservative fixed-rate strategies end with significantly larger balances. That tradeoff, spending more now versus leaving more later, is the central decision retirees face, and it deserves an explicit answer before choosing a framework.

For retirees whose essential expenses are largely covered by Social Security or a pension, the lower ending balance matters less. For those planning to self-insure long-term care or leave a meaningful estate, it matters a great deal. Our comparison of Roth IRA versus Traditional IRA covers the account-type decisions that directly affect which guardrails framework makes sense in the first place.

Three Other Retirement Withdrawal Strategies Worth Knowing

Beyond guardrails, three other frameworks appear most frequently in current retirement planning practice. Each has a genuine use case and a genuine limitation.

Bucket Strategy

The bucket approach divides assets into short-term (cash), medium-term (fixed income), and long-term (equities) segments matched to time horizon. It is psychologically intuitive, retirees draw from the cash bucket first, insulating them from panic-selling equities in a downturn. The real operational problem is refilling the buckets systematically without creating unintentional asset allocation drift or unnecessary tax events. Without disciplined rebalancing rules, what starts as a clean three-bucket system can become a disorganized mix.

RMD-Based Withdrawals

The IRS requires minimum distributions from tax-deferred accounts beginning at age 73, calculated by dividing the prior year-end balance by a life expectancy factor. Using the RMD formula as your withdrawal amount, rather than viewing RMDs as a floor, creates a naturally dynamic strategy. As the portfolio shrinks, withdrawals shrink proportionally. Morningstar’s research found this approach can support starting rates approaching 6% when combined with spending flexibility, because it inherently adjusts to both portfolio size and the retiree’s changing life expectancy.

TIPS Ladder

A Treasury Inflation-Protected Securities ladder locks in an inflation-adjusted income stream for a defined period, typically 20 to 30 years. It eliminates both market risk and inflation risk from the income floor calculation. The clear limitation: a TIPS ladder is self-liquidating. At the end of the ladder’s term, the principal is fully consumed. There is nothing left for heirs, long-term care reserves, or unexpected expenses beyond the ladder’s end date.

Two Retirement Risks That Withdrawal Articles Almost Never Cover

Most discussions of retirement withdrawal rates debate the percentage and skip the spending shocks that can invalidate any percentage. Two in particular receive almost no coverage despite being first-order planning variables.

The IRMAA Trap

Medicare’s Income-Related Monthly Adjustment Amount (IRMAA) is a concrete, dollar-denominated consequence of withdrawal sequencing decisions that is almost universally absent from retirement withdrawal articles. Medicare uses a two-year income lookback when setting Part B and Part D premiums. A large Required Minimum Distribution, a Roth conversion, or a significant asset sale in 2026 can directly raise your Medicare premiums in 2028. For retirees coordinating Roth conversions in low-income years before RMDs begin, a genuinely smart strategy, the IRMAA threshold must be part of the calculation. This links withdrawal order directly to healthcare costs in a way that matters for real budgets. Our guide on Social Security benefits in 2026 covers related benefit coordination decisions.

The Pre-Medicare Healthcare Bridge

Retirees who leave work before age 65 face a healthcare cost that rigid withdrawal plans rarely model explicitly. ACA marketplace coverage for 62-to-65-year-olds averaged $800 to $1,200 per month in 2025. For a retiree leaving work at 62, that represents up to $43,200 in additional annual spending before Medicare eligibility, a spending shock large enough to shift what withdrawal rate is actually sustainable. Any withdrawal plan that treats healthcare costs as a line item rather than a variable tied to retirement age is built on an incomplete model.

The retirement spending pattern compounds this further. Actual retiree spending tends to follow a curve: higher in the active early years, declining through the slower mid-retirement period, then spiking again late in life due to healthcare. A flat, inflation-adjusted annual withdrawal misrepresents how people actually spend across three decades.

What Morningstar’s 2025-2026 Research Actually Says

Morningstar’s annual State of Retirement Income study is the most rigorous current source on safe withdrawal rates, and its findings are more nuanced than headline summaries suggest. The base case, 3.9% for a 40/60 stock-bond portfolio with a 90% probability of success over 30 years, is the conservative anchor, up from 3.7% in 2024 due to improved return forecasts for bonds.

The finding that gets buried: retirees willing to accept genuine spending flexibility can safely start at rates approaching 5.7%, according to 401k Specialist Magazine’s coverage of Morningstar’s 2025 data. The combination of guardrails withdrawals and delayed Social Security produced the highest lifetime spending totals in Morningstar’s simulations, making Social Security timing arguably more impactful than the withdrawal rate choice itself. Delaying Social Security from age 62 to age 70 increases monthly benefits by approximately 76%, a permanent, inflation-adjusted income boost that reduces portfolio dependence from day one.

The honest caveat: flexible strategies that maximize starting rates carry real costs. The probability-based guardrails method ended simulations with a median balance of only $230,000, compared to far larger balances under conservative fixed strategies. For anyone planning to self-insure long-term care or preserve an estate, that gap is not a footnote. It is the central tradeoff.

Building a solid credit and tax foundation before retirement also affects how efficiently you can execute Roth conversions and manage taxable withdrawals. Our coverage of 2026 tax brackets is a useful reference for modeling which income levels trigger higher marginal rates during the conversion window.

Case Study: Two Retirees, Same Portfolio, Different Outcomes

To illustrate how withdrawal strategy, not just savings, determines retirement outcomes, consider two hypothetical retirees who both leave work at age 63 with $1.2 million in a 60/40 portfolio and identical Social Security benefit eligibility.

Retiree A applies the fixed 4% rule from day one: $48,000 per year, inflation-adjusted annually regardless of market conditions. She retires in January 2022, immediately absorbing the simultaneous equity drawdown and 9.1% inflation spike. Her withdrawals continue unchanged through 2023 and 2024. By the end of year three, her portfolio has declined materially, and she has no mechanism to slow the damage. She also delays Social Security to maximize her benefit but does not factor ACA bridge costs into her first three years, adding roughly $32,000 per year in unmodeled healthcare expenses before Medicare eligibility at 65.

Retiree B uses a guardrails strategy with a 5% starting rate ($60,000 per year) and pre-commits to a 10% spending cut if his effective withdrawal rate exceeds the upper guardrail. He also maintains 18 months of cash reserves before retirement begins, specifically to avoid selling equities during the 2022 drawdown. When the upper guardrail triggers in late 2022, he cuts discretionary spending, dining, travel, rather than fixed expenses. He has modeled his ACA costs explicitly and holds a separate cash reserve to cover the pre-Medicare bridge period. By year five, his portfolio has recovered enough to resume normal withdrawals.

The outcome difference is not primarily about the withdrawal percentage, it is about whether the retiree had a pre-committed response plan for the scenarios that were always likely to happen. Retiree B’s higher starting rate is sustainable precisely because the guardrails function as designed. Retiree A’s lower starting rate fails not because it was too high, but because the rigid structure provided no adjustment mechanism when conditions changed.

Action Plan: Choosing Your Retirement Withdrawal Strategy

The research is clear that no single withdrawal rate fits every retiree. The following steps translate the frameworks above into a practical decision sequence.

1. Establish your income floor first. Calculate what Social Security, pension, or annuity income covers relative to your essential monthly expenses. If guaranteed income covers 80% or more of essential spending, you have significantly more flexibility in your portfolio withdrawal rate. If the gap is large, the floor must be built before choosing a rate.
2. Model your pre-Medicare healthcare costs explicitly. If you plan to retire before age 65, price ACA marketplace coverage for your age and income level in the year you intend to retire. Build that cost into your annual withdrawal need, not as a footnote but as a core budget line.
3. Choose a framework based on your legacy and spending priorities. If leaving a meaningful estate or self-insuring long-term care is a priority, a conservative fixed-rate strategy (3.9% to 4%) preserves more ending balance. If maximizing spending in the early, active retirement years matters more, a guardrails strategy with a 5% starting rate is defensible, provided you pre-commit to the spending adjustment rules before markets force the decision.
4. Delay Social Security if your health and cash reserves allow. Morningstar’s simulations found delaying to age 70 produced the highest lifetime spending outcomes of any single variable tested. The 76% benefit increase from delaying age 62 to 70 is a permanent, inflation-adjusted income floor that directly reduces portfolio dependence.
5. Build a cash buffer before retirement begins. Holding 12 to 24 months of spending in cash or short-term instruments before the retirement date eliminates the need to sell equities at depressed prices during the highest-risk window. This single step addresses the most acute form of sequence of returns risk without changing your asset allocation