Foundations that hold permanent endowments face a distinctive challenge: managing investment capital in a way that sustains grantmaking capacity in perpetuity, while aligning investments with the philanthropic mission the capital is intended to serve. Investment policy — the framework governing how foundation capital is invested, managed, and distributed — is one of the most consequential decisions a foundation board makes.
A foundation that holds $20 million in endowment and distributes 5% annually will grant $1 million per year — in perpetuity, if the endowment maintains its real value. A foundation with a poor investment policy — or one that neglects investment governance — may see its endowment erode in real terms, reducing future grantmaking capacity.
Conversely, a foundation that invests too conservatively may preserve capital but at the cost of lower grantmaking in the near term. Investment policy balances the interests of current beneficiaries (who benefit from higher distribution) against future beneficiaries (who depend on endowment preservation).
Every foundation with a permanent endowment should have a written Investment Policy Statement (IPS) — the governing document for endowment investment. A well-structured IPS addresses:
Investment objectives
The primary investment objective for most foundations: generate sufficient return to fund distributions at the target distribution rate (typically 4-5% of endowment value) while preserving or growing the endowment in real terms (after inflation). Secondary objectives may include responsible investment, impact investing, or specific asset class exposure.
Target asset allocation
Asset allocation — the mix of equities, bonds, alternatives, property, and cash — is the most significant determinant of long-term investment returns. A typical endowment allocation might include:
- 60-70% growth assets (global equities, private equity)
- 20-30% defensive assets (bonds, cash)
- 10-20% alternatives (property, infrastructure, hedge funds)
Asset allocation should reflect the foundation's risk tolerance, time horizon, and liquidity needs.
Rebalancing policy
Markets move asset allocations away from targets over time. Rebalancing policy specifies when and how the foundation restores its target allocation — through systematic rebalancing, tolerance bands, or opportunistic adjustment.
Liquidity requirements
Foundations need liquid assets to fund near-term grant commitments. The IPS should specify the minimum liquid asset holding required to meet grant obligations.
Investment manager guidelines
If the foundation uses external investment managers, the IPS specifies the criteria for manager selection, the monitoring framework, and the conditions for manager termination.
Spending policy — how much of the endowment is distributed each year — is closely linked to investment policy. Common approaches:
Fixed percentage of endowment value
The simplest approach: distribute a fixed percentage (e.g., 5%) of endowment value each year. This preserves intergenerational equity but creates year-to-year volatility in distribution as endowment value fluctuates.
Moving average
Distribute a percentage of average endowment value over the past three to five years. This smooths year-to-year volatility while maintaining a connection to endowment value.
Hybrid approaches
Many foundations use hybrid spending policies — blending endowment-based distributions with inflationary adjustments and minimum/maximum constraints — to balance stability and intergenerational equity.
The 5% convention
In many jurisdictions, 5% is the conventional target distribution rate — sufficient to fund meaningful grantmaking while (historically) preserving endowment value in real terms. In lower-return environments, 5% distribution may erode real endowment value; in higher-return environments, it may allow growth.
An increasing number of foundations align their investment portfolios with their philanthropic mission — recognising that it is inconsistent to fund health programmes while investing in tobacco, or environmental programmes while investing in fossil fuels.
ESG integration
ESG (Environmental, Social, Governance) integration incorporates non-financial factors into investment analysis — assessing how companies manage environmental risks, treat workers, and govern themselves. ESG-integrated investing is now mainstream; most major investment managers offer ESG-integrated options.
Negative screening
Negative screening excludes specific sectors or activities from the investment portfolio — fossil fuels, weapons manufacturers, tobacco, gambling, or other industries inconsistent with the foundation's values. Screening is relatively straightforward to implement but may affect the investment universe and portfolio construction.
Positive screening and thematic investing
Positive screening invests in companies that demonstrate positive environmental or social performance. Thematic investing directs capital toward sectors addressing specific challenges — clean energy, sustainable agriculture, affordable housing.
Impact investing
Impact investing deploys capital with explicit intention to generate social or environmental outcomes alongside financial returns. Program Related Investments (PRIs) — below-market rate loans or equity to mission-aligned organisations — are a tool available to foundations in some jurisdictions.
Investment governance — how the board oversees and is accountable for investment decisions — is as important as the investment policy itself.
Board investment committee
Most foundations with significant endowments establish an investment committee — a subcommittee of the board with investment expertise, responsible for overseeing investment management. The committee reviews performance, monitors manager compliance with the IPS, and recommends policy changes to the full board.
External advisors
Investment consulting firms advise foundation investment committees on asset allocation, manager selection, and performance benchmarking. Selecting a consultant who understands the distinctive context of philanthropic endowments — particularly on responsible investment — is important.
Performance monitoring
Regular investment performance reporting — quarterly at minimum — compares actual performance against benchmark returns, tracks asset allocation against target, and monitors investment manager performance against their individual benchmarks.
Tahua's grants management platform supports foundation governance including endowment tracking, spending policy management, and the financial oversight tools that help foundation boards fulfil their stewardship responsibilities.