Why order matters in retirement
During accumulation — when you are mostly adding money and not selling — the order of yearly returns barely changes the ending balance for a given set of returns. In retirement, withdrawals change the math. Selling after a market drop locks in losses: fewer shares remain to participate in the recovery. That is sequence of returns risk.
The demonstration above uses one return set in two orders (Scenario A hits the bad years first; Scenario B reverses the list). Average return is identical; ending balances are not. The chart is intentionally simple — not tax-aware, not account-aware — so the visual difference is obvious.
This page is an educational feeder into historical testing. It is not a second Monte Carlo engine and not a money-longevity solver. If you came here looking for “how long will $X last,” use How long will my money last? instead.
Accumulation vs withdrawal: the same returns, different job
Imagine ten years of returns that average about the same whether you list them forward or backward. Without withdrawals, both orderings end near the same place. With a fixed annual withdrawal, the early-loss ordering spends from a depressed balance and never fully rebuilds. The late-loss ordering compounds longer before the hit. That asymmetry is why “average return” alone is a weak retirement comfort metric.
Real households also face inflation, income timing, and account location. Those belong in the full planner. This page’s job is narrower: make order risk intuitive, then send you to tools that use real or randomized market paths.
From intuition to evidence
After you see the gap on the chart, replay a spending plan across published history with the Historical Retirement Calculator. Compare with randomized stress on the Monte Carlo calculator. Early retirement examples that combine all three lenses live on Can I retire at 60?.
How this page differs from our other free tools
- Historical — many real starting years; success counts and best/worst windows.
- Monte Carlo — many random paths; success share and P10/P50/P90.
- Longevity / Spending — fixed-assumption solvers without market sequence stress.
- This page — teaching demo only; same returns, different order, two lines on a chart.
Important limitations
The return list is illustrative, not a forecast. Constant withdrawals ignore Social Security timing, taxes, and rebalancing. Do not treat the ending-balance gap as a personalized shortfall probability. Educational content only — not advice.
Prefer a narrative tour? Jim & Susan’s sample plan shows a full household. Or create a free account to stress sequence risk with your own accounts and claiming ages.