Sequence of Returns Risk Calculator
Two retirees can have the same average return over 30 years but end up with very different portfolio values if their returns arrived in different orders. This calculator lets you compare a "good sequence" scenario (strong returns in early retirement) against a "bad sequence" scenario (poor returns early, strong returns later) to visualise the impact of timing. Both scenarios use the same annual returns, just in reverse order, along with the same annual withdrawal.
Sequence of returns formula
Balance(y) = (Balance(y-1) - Annual Withdrawal) * (1 + Return(y))
Good scenario: Return = early rate for years 1-10, late rate for years 11-30
Bad scenario: Return = late rate for years 1-10, early rate for years 11-30
Both scenarios have the same arithmetic average return
The withdrawal is taken at the start of each year before applying the return. This models the real-world situation where you must sell assets to fund spending regardless of market conditions that year.
Strategies to reduce sequence risk
- Cash buffer: keep 1-2 years of expenses in cash so you never have to sell equities during a downturn.
- Bond ladder: use short-term bonds maturing in years 1-5 to fund withdrawals during market downturns.
- Flexible spending: reduce discretionary spending by 10-20% in down market years.
- Guardrails strategy: set upper and lower spending guardrails based on portfolio value, adjusting withdrawals when you cross them.
- Delay retirement: working even 1-2 extra years dramatically reduces sequence risk by reducing the withdrawal period and allowing continued contributions.
Sequence of returns risk: frequently asked questions
What is sequence of returns risk?
Sequence of returns risk is the danger that the timing of withdrawals from a retirement portfolio will negatively impact the overall rate of return available to investors. A bad sequence (poor returns in early retirement) is far more damaging than the same poor returns occurring later, because withdrawals at depressed prices lock in losses.
Why does sequence matter only when withdrawing?
During accumulation, the order of returns does not matter: a 10-year period with any order of returns produces the same ending balance if there are no withdrawals (since multiplication is commutative). But withdrawals break this symmetry: selling at low prices reduces the number of shares available to benefit from later recovery.
How can I mitigate sequence of returns risk?
Strategies include: building a cash or bond bucket covering 2-5 years of expenses so you do not need to sell equities during downturns; flexible withdrawal strategies (spending less when markets are down); a bond tent (higher bond allocation at retirement, gradually shifting back to stocks); and maintaining a diversified globally diversified portfolio.
What is the typical magnitude of sequence risk?
Research by Bengen (1994) and Pfau (2010) showed that a retiree who retired in 1966 and faced a bad sequence of returns needed a much lower withdrawal rate than someone retiring in 1950 who faced a good sequence, even though their average returns over 30 years were similar. The difference in safe withdrawal rates can be 1-2 percentage points.
Does sequence of returns risk apply to the accumulation phase?
For regular contributions (dollar-cost averaging), a reverse sequence risk applies: poor returns early in accumulation are actually beneficial, as you buy more shares at lower prices. The risk is most acute in the 5-10 years before and after retirement, known as the 'retirement red zone.'
Official sources
- Bengen, W.P. (1994). Determining Withdrawal Rates Using Historical Data. Journal of Financial Planning, 7(4), 171-180. The original research establishing the 4% rule and the importance of sequence.
- Federal Reserve: Selected Interest Rates (historical return data).
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.