Retirement Calculators
Sequence-of-Returns Risk Simulator
Same average return, different order, a different ending balance once withdrawals begin.
Enter a starting balance, a fixed annual withdrawal, and a sequence of annual returns. This tool runs that exact sequence forward and reversed, so you can see, with your own numbers, how sequence-of-returns risk changes the ending balance even though both orders average the same return.
Direct Answer
Sequence-of-returns risk is the risk that the order of investment returns, not just their long-run average, can determine whether a withdrawal strategy succeeds. It matters once regular withdrawals begin, and it barely matters during pure accumulation with no withdrawals.
What Is Sequence-of-Returns Risk?
Sequence-of-returns risk is the risk that the order of investment returns, not just their long-run average, can determine whether a withdrawal strategy succeeds. It matters once regular withdrawals begin, and it barely matters during pure accumulation with no withdrawals.
Sequence-of-Returns Risk Simulator
Results replay the exact return sequence you enter, for education only. Not a forecast, and not a recommendation about any specific withdrawal rate.
Enter a starting balance, a fixed annual withdrawal, and a comma-separated list of annual returns in the order you want to model.
All calculation happens locally in your browser. No values are sent to any server or captured in analytics.
What This Simulator Does
It applies your entered returns to your starting balance, year by year, subtracting your fixed annual withdrawal at the start of each year (or the end, if you choose that option), then repeats the exact same calculation using your returns in reverse order. Comparing the two ending balances isolates the effect of return order from the effect of the average return itself, exactly as described in Swoopr's Retirement Investing guide.
Why Reversing the Same Returns Changes the Result
Without any withdrawals, compounding a fixed set of percentage returns produces the same ending balance regardless of order, because multiplication is commutative: 1.20 × 0.80 equals 0.80 × 1.20. Add a fixed-dollar withdrawal into the mix and that no longer holds. A loss in an early year forces more shares to be sold at a depressed price to fund that year's withdrawal, leaving fewer shares to participate in a later recovery. A gain in an early year does the opposite: it funds withdrawals from a larger base before any loss arrives.
Worked Example
Hypothetical example, for education only.
A portfolio starts at $100,000 and takes a $10,000 withdrawal at the start of each year, then earns +20% in year one and -20% in year two.
- Year 1: ($100,000 − $10,000) × 1.20 = $108,000
- Year 2: ($108,000 − $10,000) × 0.80 = $78,400
Reverse the order, so the -20% comes first: ($100,000 − $10,000) × 0.80 = $72,000 after year one, then ($72,000 − $10,000) × 1.20 = $74,400 after year two. The loss-first sequence ends $4,000 lower than the gain-first sequence, even though both sequences average the same +20%/-20% return.
How Sequence-of-Returns Risk Can Be Managed
No single tactic eliminates sequence risk, but several approaches manage it: holding a cash or short-duration liquidity buffer so withdrawals do not have to come from depressed assets during a downturn, building spending flexibility so withdrawals can be reduced in a bad year rather than staying fixed, maintaining diversification across asset classes that do not all decline together, and rebalancing deliberately rather than reactively. Each reduces the impact of a bad early sequence; none guarantees a specific outcome.
Limitations and Edge Cases
- Uses a single fixed-dollar withdrawal amount for every year, not an inflation-adjusted or percentage-of-balance withdrawal.
- Does not model taxes, fees, rebalancing, or variable spending.
- Requires you to supply the exact return sequence; it does not simulate randomized or probabilistic market scenarios.
- A balance is floored at zero rather than allowed to go negative, matching how an account actually depletes.
Privacy and Data Handling
All calculations run in your browser. Values you type into this simulator are not sent to Swoopr Investment's servers, stored, or logged; closing or reloading the page clears them. No account or sign-in is required to use this tool.
Sequence-of-Returns Risk FAQs
What is sequence-of-returns risk?
Sequence-of-returns risk is the risk that the order of investment returns, not just their long-run average, can determine whether a withdrawal strategy succeeds. It matters once regular withdrawals begin and barely matters during pure accumulation with no withdrawals.
Why does reversing the same returns change the ending balance?
Without withdrawals, compounding a fixed set of percentage returns produces the same result regardless of order, since multiplication is commutative. Once a fixed-dollar withdrawal is taken each year, an early loss forces more shares to be sold at a depressed price to fund that withdrawal, leaving less to participate in a later recovery, which breaks that order-independence.
Does this simulator predict future returns?
No. It only replays the exact return sequence you type in, forward and reversed, against your starting balance and withdrawal amount. It does not forecast, model probability, or recommend a withdrawal rate.
How can sequence-of-returns risk be managed?
No single tactic eliminates it, but a cash or short-duration liquidity buffer, spending flexibility to reduce withdrawals in a weak year, diversification across asset classes, and deliberate rebalancing each reduce the impact of a bad early sequence without guaranteeing a specific outcome.