5%, 10% or 20% in Venture Capital: Which Allocation Can an Institutional Portfolio Actually Sustain?
Mercer's review of the 2025 NACUBO-Commonfund Study describes how institutional return targets and spending needs interact. Endowments carry real return requirements and recurring spending obligations. A venture allocation should be sustained through the institution's whole liquidity cycle.
Mercer noted a combined long-term hurdle of roughly 7.8%, reflecting average spending rates and higher-education inflation over 25 years.
A sample institutional portfolio shows venture capital at twenty percent and the rest of the portfolio at eighty percent.
A High Venture Target Needs Liquidity Support
At 20%, venture can become one of the portfolio decisions that determines how much cash discipline the institution needs.
- Venture capital20%
- Other portfolio assets80%
View allocation data and assumptions
| Portfolio segment | Share | How to read it |
|---|---|---|
| Venture capital | 20% | Large illiquid growth allocation requiring formal pacing and stress testing. |
| Other portfolio assets | 80% | The remainder of the portfolio that supports liquidity and spending. |
Sustainability Matters More Than One Target Percentage
What Changes as the Target Rises?
| Target | Possible use | Main work required |
|---|---|---|
| 5% | A meaningful but contained part of growth assets | Enough manager access for the allocation to matter |
| 10% | A core long-term return source | Multi-vintage pacing, manager diversification, and cash planning |
| 20% | A major portfolio driver | Strong liquidity base, dedicated oversight, and limits on concentration |
These descriptions are not recommendations. They show how the operating burden rises with the target. A larger allocation can be sensible, but it needs more than a higher percentage in the policy document.
Run a Combined Stress Case
The hard case is not venture falling by itself. It is public equities declining, private marks adjusting slowly, distributions stopping, and calls continuing. The venture allocation can then rise as a percentage of a smaller total portfolio while liquid assets are needed elsewhere. The institution should model benefit payments, spending, debt, collateral, and every private-market commitment in the same case. Venture cannot be assessed as a stand-alone bucket.
Commitment Pace Matters More Than the Snapshot
The reported allocation reflects called capital and current value. Future exposure is also shaped by uncalled commitments. A portfolio at 5% today may already be on a path to 10% if several large funds are still early in their investment periods. Annual pacing should therefore use both current NAV and expected calls. Re-ups should not be automatic when the programme is ahead of plan.
What Makes a Higher Allocation More Durable?
- Long time horizon: Less need to sell during weak exit markets.
- Stable liquid assets: A clear source for capital calls.
- Vintage spread: Less dependence on one entry market.
- Different paths to value and liquidity.
- Strong reporting: Early warning when commitments, NAV, or concentration drift.
Sustainability is proven in the downside case. The allocation is right when the institution can maintain it without forced sales, broken commitments, or a sudden stop in manager relationships.
Test the Dollar Burden
Percentages become more useful when translated into dollars. On a $1 billion portfolio, 5%, 10%, and 20% venture allocations equal $50 million, $100 million, and $200 million. The last figure can become a dominant private-market allocation.
Mercer reported that FY25 endowments maintained 86% of assets in equities and equity-like strategies, including hedge funds. A high venture target should be reviewed alongside the rest of the growth portfolio.
Stress the Unfunded Side
If 50% of a $200 million venture portfolio remains unfunded, the institution still has $100 million of future obligations. That is 10% of a $1 billion portfolio before any new commitments.
On a $1 billion portfolio, five, ten, and twenty percent venture allocations equal fifty, $100 million, and $200 million.
Sustainable Allocation Stress Points
A 20% venture target can be four times as large as a 5% target, so the stress case should scale with the policy decision.
View allocation stress data
| Policy allocation | Dollar exposure on $1B portfolio | If 50% remains unfunded |
|---|---|---|
| 5% | $50M | $25M |
| 10% | $100M | $50M |
| 20% | $200M | $100M |
A Target Range Is More Useful Than a Fixed Point
Venture exposure moves even when the institution makes no new decision. Public markets change the denominator, private marks move with a lag, capital is called over several years, and distributions arrive unevenly. A policy that requires exactly 10% at all times will force unnecessary reactions. A range gives the institution room to keep a steady commitment pace while still protecting liquidity. The policy should state what happens near the top of the range, which commitments can continue, and whether secondaries or slower re-ups are available if exposure remains high.
The lower end matters too. Falling below target after distributions is not a reason to rush into weak managers. A sustainable allocation is built through repeatable annual decisions, not by making one large commitment to correct a temporary percentage.
Frequently Asked Questions
Is 20% in venture too high?
It can be high: It may fit some long-duration institutions, but only with strong cash planning, manager access, and governance support.
Should institutions start at their long-term target?
Usually no: Building across vintage years can reduce timing risk and help the institution learn before the allocation becomes too large.
Related Reading
vintage-year buildout, unfunded commitment risk, and allocation materiality.