Retirement’s First Five Years: Why the Order of Returns Changes the Plan

Two retirement portfolios experience the same two annual returns. One rises first and falls second. The other falls first and rises second. Without withdrawals, they finish at the same value. With withdrawals, they can finish in very different places.

That is why a retirement plan cannot be judged only by an average return. Once a household starts using its investments to pay bills, the sequence of market outcomes becomes part of the spending problem.

The first five years are a useful review window, not a magic threshold or a universal danger period. The BK-OS question is concrete: what happens to this household’s options if a difficult market arrives near the beginning of withdrawals?

The same returns can leave different balances

Consider two invented portfolios starting at $100,000. In both cases, $10,000 is withdrawn at the start of each year. Ignore taxes, fees and inflation to isolate the sequence effect.

In the first sequence, year one returns +20%. After the first withdrawal, $90,000 grows to $108,000. At the start of year two, another withdrawal leaves $98,000. A −20% return then leaves $78,400.

Reverse the order. The first withdrawal again leaves $90,000, but a −20% first year reduces it to $72,000. The next withdrawal leaves $62,000. A +20% second year then produces $74,400.

The gap is $4,000 despite the same returns in the opposite order and the same withdrawal amounts. Without any withdrawals, both sequences would end at $96,000. This is a two-year teaching example, not a forecast or a proposed withdrawal plan. The withdrawal timing is explicitly at the start of each year; changing that assumption changes the numbers.

Selling during a decline changes the recovery base

A withdrawal removes assets that would otherwise participate in later returns. When values are already down, a fixed-dollar withdrawal consumes a larger share of what remains. The next recovery, if it occurs, applies to a smaller base.

That is the mechanism behind sequence risk during withdrawals. It does not mean every early decline ruins retirement. It means the plan’s flexibility and funding structure matter alongside the portfolio’s long-run prospects.

A household still contributing to savings faces a different set of cash flows. Someone who has begun withdrawals cannot simply import the experience of an accumulating investor and assume the result is equivalent.

The spending plan is part of the risk plan

Essential expenses and flexible expenses do not behave the same way. Housing, necessary care and basic utilities may leave less room for adjustment than travel or discretionary purchases. A plan that calls every expense flexible can overstate its resilience.

Review which income sources continue regardless of portfolio sales, which obligations arrive on fixed dates, and where spending could realistically change. This article does not recommend a particular cash reserve, allocation or withdrawal rate. Those decisions depend on personal circumstances and professional analysis.

The useful output is a set of options. If the market falls, what could be delayed? Which income is dependable? Which payments cannot wait? Who will notice early enough to act without panic?

Inflation and longevity are different tests

Sequence risk is not the only uncertainty. Inflation can make a fixed dollar amount less useful. A longer retirement can require funding over more years. Unexpected care costs can change both spending and decision-making capacity.

These risks should not be collapsed into one optimistic spreadsheet assumption. A plan can survive an early market decline yet struggle with sustained cost increases. It can look adequate over a short horizon and become fragile over a longer one.

Stress cases should therefore be varied and clearly labelled. They are questions about resilience, not assigned probabilities or promises about the future. A qualified professional can help distinguish what has been modeled from what has merely been assumed.

Review dates are more useful than reassurance

A plan that only gets reviewed after a frightening headline is vulnerable to rushed choices. A periodic review can instead check actual spending, remaining assets, changes in health and the household’s capacity to adjust.

The important discipline is to agree on what would trigger another look. A change in regular spending, a new care responsibility or a major loss of income may matter more than a daily market move. Make the trigger observable and the next conversation clear.

A retirement plan is not a certificate that uncertainty has been removed. It is a way to preserve choices when uncertainty arrives.

Before you act

• Has the plan tested poor early returns while withdrawals continue?
• Which essential expenses need dependable funding, and which spending is genuinely flexible?
• Are inflation, a longer retirement and care costs being examined separately?
• What assumptions about withdrawal timing, taxes and fees are inside the model?
• Which change would trigger a review, and who would help evaluate it?

Sources and scope

• Investor.gov: What Is Risk? — investment uncertainty and inflation risk.
• Investor.gov: Older Investors — resources for reviewing and protecting retirement investments.

The sequence calculation is original, invented educational arithmetic, not a historical backtest or customer result. It illustrates withdrawal timing without prescribing a portfolio. Analysis uses the proprietary BK-OS method.

This is education, not investment advice. Your situation is your own — talk to a licensed professional before you act.