How a $2.4 Million 401(k) Can Still Lose Six Figures in Retirement Without the Right Withdrawal Plan

A $2.4 Million 401(k) Can Still Fail if Bad Returns Hit Early

A $2.4 million 401(k) can still produce a six-figure shortfall if poor returns arrive in the first years of retirement.

A large balance is not the same as a dependable income stream. Even a $2 million portfolio can produce very different outcomes under the same headline assumptions: same starting balance, same annual withdrawals, and the same average return. In one scenario, the portfolio finishes near $2.4 million; in another, it ends up about $1.7 million less. The difference was not the average return. It was the order in which gains and losses occurred.

That is why sequence of returns risk matters so much for 2026 retirees. Once income begins, withdrawals reduce the amount of money available to recover. If the market falls early in retirement, you may need to sell more assets at depressed prices, leaving less capital to benefit from the later rebound.

Applied to a $2.4 million 401(k), that means a big number alone does not guarantee safety. The plan also has to be built for a 25- or 30-year retirement.

Why Average Return Alone Can Mislead Retirees

Average return describes long-term performance. Sequence risk describes whether the portfolio actually lasts while you are drawing income from it.

Why the order of returns matters more than the average

Sequence of returns risk is the danger that bad market returns arrive early in retirement, right after withdrawals begin. During the accumulation years, a down market is frustrating, but you are usually still adding money. In retirement, withdrawals reduce the amount of money available to recover, so the timing of returns can change how long the portfolio lasts even if the long-term average looks reasonable.

A simple way to picture it: each year you pull cash from the account to live on. If the market weakens while you are taking money out, the later recovery has a smaller base to grow from. That is why the bad years can hit early and leave the good years trying to rebuild a shrunken portfolio. Two retirees can experience the same average returns over 30 years and finish in very different positions.

Morningstar's 2026 withdrawal-rate debate in plain English

This is why the withdrawal-rate debate matters. Current research points to 3.9% for retirees who want a steady inflation-adjusted paycheck for 30 years. William Bengen's updated guidance is higher, at 4.7%. The disagreement does not mean one side is wildly wrong and the other wildly right. It means the right starting rate depends on what your plan can do if markets turn early.

Why spending flexibility changes the number

Morningstar's research also notes that if retirees are willing to be flexible with their withdrawals, that can help elevate how much they can spend. Another source reads that number as high as 5.7% when spending flexibility is part of the plan. On a $2 million portfolio, that is the difference between $78,000 and $114,000 a year.

That is the real tradeoff. A higher starting rate is not just an academic improvement. It can materially change retirement income, but usually only if the plan can adjust when markets do.

Build a Withdrawal Plan Instead of Relying on One Big Balance

The practical fix is to stop treating a large 401(k) like one giant checking account. The goal is to protect near-term spending, preserve long-term growth, and avoid being forced to sell into weakness. That is the logic behind a bucket strategy.

Use cash reserves as a shock absorber

The first move is simplicity: keep enough safe, liquid assets to cover roughly one to two years of spending. That buffer helps you avoid selling investments during a downturn in the early years of retirement, when poor investment returns occur early in retirement after withdrawals begin.

A clean way to organize this is three buckets: - Near-term spending: cash or short-term bonds for the next 1–2 years of withdrawals. - Medium-term stability: more conservative assets that can fund the next several years if markets stall. - Long-term growth: the portion left alone so it can keep compounding over a 25- or 30-year retirement.

Make the withdrawal rule explicit

Many plans fail because they do not say what happens when markets drop. A sturdier rule is straightforward: protect the cash buffer first, then trim discretionary spending, rather than automatically selling investments at the worst time. That is why flexibility matters. Morningstar's research says if retirees are willing to be flexible with their withdrawals, that can help elevate how much they can spend.

Layer other income before tapping the 401(k)

Do not ask one 401(k) to fund the whole retirement. Map out how other income sources such as Social Security or pensions cover essential expenses first, then use the portfolio for the gap. That approach can reduce pressure on the portfolio in bad markets and make the withdrawal plan more resilient.

When the six-figure-loss thesis stops applying

If you already have a full near-term cash cushion, true spending flexibility, and a clear withdrawal plan, then bad sequence risk is less likely to derail the whole retirement. The core lesson is not that average returns are irrelevant. It is that the same average annual return can still produce very different outcomes when withdrawals begin at the wrong time.