What it means
Pooling exists because managing hundreds of small gifts separately would be expensive and inefficient. A single portfolio of $120,000,000 can access institutional fee rates and a wider range of investments than a $50,000 gift ever could on its own.
Unit accounting is the mechanism that keeps the pooling fair. Each gift buys units at the fund's current value per unit, and the number of units it holds determines its share of both investment returns and annual distributions from then on.
The fund must also track donor restrictions, which is where charity accounting gets fiddly. Some capital is permanently restricted by the donor, some is restricted only until a condition is met, and some is money the board has chosen to treat as endowment but could legally release, usually called quasi-endowment or board-designated funds.
Governance sits with trustees who set an investment policy statement covering asset allocation, acceptable risk, ethical exclusions and the spending rate. That document is what an auditor or regulator asks for first when questioning how the fund is run.
Reporting is normally done both at fund level and at individual gift level, because donors want to know what their own named fund achieved. Producing both views from one pooled portfolio is precisely what the unit structure makes possible.
In practice
Real-world examples
Example 1
A university consolidates 180 separate named gifts into a single endowment fund and cuts its blended investment management fee from 1.1% to 0.55%. On $200,000,000 that halving is worth about $1,100,000 a year in additional returns available for spending.
Example 2
A museum's board designates $3,000,000 of unrestricted reserves as quasi-endowment and invests it alongside the donor-restricted capital. The money is treated as endowment for investment purposes but can be released by a board vote if the museum faces a crisis.
Example 3
A hospital foundation reports to a donor that her $500,000 gift, made eight years ago, is now valued at $760,000 and has paid out $190,000 in grants over that period. The unit records make the split between growth and distribution straightforward to produce.
Think of it
Imagine you inherit a golden goose. Instead of roasting and eating the goose for one big meal, you feed it and collect the daily golden eggs. The goose represents the endowment principal, and the eggs represent the investment income you spend.
Formula
Calculation
Unit value = Net asset value of the fund / Units in issue
Units purchased by a new gift = Gift amount / Unit value
A charitable endowment fund has a net asset value of $120,000,000 and 6,000,000 units in issue. The unit value is therefore $120,000,000 / 6,000,000 = $20.00 per unit.
A new donor gives $2,000,000. That gift buys $2,000,000 / $20.00 = 100,000 units, taking the total units in issue to 6,000,000 + 100,000 = 6,100,000. The unit value is unchanged at $20.00, so no existing donor is diluted.
The trustees set an annual distribution of 4% of unit value, which is $20.00 x 0.04 = $0.80 per unit. The total payout across the fund is 6,100,000 x $0.80 = $4,880,000.
A named scholarship fund holding 50,000 units therefore receives 50,000 x $0.80 = $40,000 for the year. That figure can be reported to the donor family without ever splitting the underlying portfolio.Case study
Seen in the real world
Rivermont Charitable Trust is a fictional endowment fund created for this illustrative example, holding $120,000,000 across 6,000,000 units at $20.00 each. It managed 240 named funds ranging from a $25,000 memorial award to a $9,000,000 research chair, all invested in one pooled portfolio.
When a new $2,000,000 gift arrived, it simply bought 100,000 units at the prevailing $20.00, raising units in issue to 6,100,000. At the trustees' 4% distribution rate of $0.80 per unit, the fund paid out $4,880,000 that year, and each named fund received its share automatically in proportion to its units.
The illustrative difficulty came when a donor asked for her fund to be invested only in companies meeting a specific ethical screen. Because the money sat in a single pooled portfolio, Rivermont either had to apply the screen to everyone or run her gift as a separate account at higher cost, and that trade-off is the standard price of pooling.
Watch out
Common mistakes
- Using the words endowment and endowment fund interchangeably in formal reporting. The endowment is the restricted capital itself, while the endowment fund is the pooled vehicle that invests it, and auditors distinguish between the two.
- Assuming all money inside an endowment fund is permanently restricted. Board-designated or quasi-endowment sits in the same portfolio but can legally be released by a board decision.
- Reporting only fund-level performance to donors. Named-fund donors want to see what their own gift earned and distributed, which is exactly what unit accounting is designed to show.
Questions
People also ask
What does unitisation actually achieve?
It lets many separate gifts share one portfolio while keeping each gift's proportional claim on returns and distributions completely clear.
Who decides how an endowment fund is invested?
Trustees or a designated investment committee, working to a written investment policy statement that sets asset allocation, risk limits and the spending rate.
Can a gift be withdrawn from an endowment fund?
Ordinarily not, since permanently restricted capital stays invested, although board-designated funds within the same pool can usually be released.