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What capacity actually measures
Capacity is the answer to a mechanical question: if this portfolio loses 30% and the client cannot recover that loss before they need the money, can they still meet their goals? The inputs are objective:
- Time horizon for the assets.
- Required cash flow during the horizon.
- Other assets and income outside the portfolio.
- Floor expenses that cannot be deferred.
- Critical goals that have hard deadlines (tuition, retirement, healthcare).
Capacity does not depend on how the client feels about loss. It depends on the math.
Why capacity often diverges from willingness
The two reliably split in opposite directions for two client types:
- Recent retirees — high willingness (years of bull-market experience), low capacity (no recovery time, withdrawals reducing the base). The advisor's job is to translate the gap into a portfolio that respects the lower number.
- High-earning early-career professionals — low willingness (limited investing experience), enormous capacity (decades of horizon, growing income). The advisor's job here is the opposite — to give the client confidence to take the risk their capacity allows.
How to calculate capacity
A defensible capacity calculation answers four questions:
- What is the maximum drawdown the portfolio could absorb such that the client still meets their critical goals on schedule?
- How does that drawdown change as the time horizon shortens (years to retirement, years to tuition)?
- What buffer is built in for sequence-of-returns risk if withdrawals are happening?
- What floor expenses must be funded from non-portfolio sources before the portfolio is "at risk"?
Capacity and the IPS
The IPS should reference capacity as a hard constraint. If the client's capacity is to absorb at most a 25% drawdown without compromising goals, the strategy must be built so a typical recession scenario stays within that band. Strategies that breach capacity require explicit client acknowledgment and additional documentation.
What examiners look for
- Documented capacity calculation, not just a willingness questionnaire.
- Connection between capacity and the portfolio's stress-test outcomes.
- Annual refresh of capacity inputs (time horizon, expense base, other assets).
- Documented acknowledgment when willingness exceeds capacity and the strategy honors the lower number.
How StratiFi thinks about risk capacity
Capacity is the easiest of the three risk dimensions to calculate and the most often skipped. The firms that hold up under examination — and that protect clients best in stress — anchor the suitability conversation in capacity, then layer willingness as a behavioral overlay. When the two diverge, the file shows which number governed the strategy and why. When they align, the work is done.
Frequently asked questions
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How is risk capacity different from risk willingness?
Capacity is mechanical — what the client can financially afford to lose. Willingness is psychological — what the client can emotionally bear. Capacity is calculated from cash flows and horizon; willingness is captured in conversation. Defensible advisory practice captures both and reconciles them. -
How often should capacity be reviewed?
At least annually, and any time there is a material change in horizon, income, expenses, or other assets. Capacity is more stable than willingness but also more consequential — a stale capacity number can mask a strategy that is no longer suitable. -
What if capacity is lower than willingness?
The strategy should respect the lower number — capacity. A client may want to take more risk than their capacity allows, but a strategy that breaches capacity puts the goals at risk regardless of the client's stated willingness. Document the conversation and any client acknowledgment if the deviation is allowed.