Endowment Spending: What Museums Balance Every Year
Nonprofit museums navigate UPMIFA rules, the 4-7% spending standard, and investment decisions to preserve endowments while funding current operations.
Museums face a straightforward but difficult choice each year: how much of their endowment can they spend now without jeopardizing future operations? The answer determines whether institutions can fully fund exhibitions, staff and conservation work, or whether they must cut programs and defer acquisitions.
The constraint comes from UPMIFA, the Uniform Prudent Management of Institutional Funds Act, adopted by 49 states. This law does not set a hard cap. Instead, it requires boards to consider seven specific factors when determining spending rates, then document their reasoning. The practical result: most museums settle into policies that spend 4 to 7 percent of endowment value annually, justified by formulas that blend market values, inflation rates and long-term return assumptions.
The seven factors boards must weigh
UPMIFA replaces its predecessor law (UMIFA) with a shift toward preserving purchasing power rather than just historic dollar value. The act requires that boards evaluate seven concrete factors when setting spending policy. These are: the permanent or time-limited nature of each fund; the purposes stated by donors; general economic conditions; the likely effect of inflation and deflation; the expected total return on investments; the financial resources available to the organization beyond the endowment; and the investment policy the board has adopted.
Boards typically document this analysis in an investment policy statement and update it annually. The process matters legally. A museum that follows the seven-factor test and documents its reasoning has satisfied UPMIFA's prudence standard, even if spending reaches the upper end—up to seven percent. The law creates a presumption against distributions exceeding seven percent, but does not prohibit them if the board can justify the rate by reference to the seven factors.
How the 4-7 percent range became standard
The 4 to 5 percent range emerged from decades of institutional experience and academic research on portfolio returns. Most museum boards adopt policies within this band because it balances two competing aims: funding current programming and preserving real purchasing power of the endowment principal over time. Institutions that spend more than the expected long-term return on their portfolio erode the principal over generations.
The MacArthur Foundation exemplifies how institutions adjust this standard. The foundation committed to raising its endowment payout from the IRS minimum of 5 percent to 6 percent for the next two years, accepting faster principal depletion to direct more money to current charitable work. This choice sits within UPMIFA's boundaries but reflects a deliberate decision to prioritize present-day grants over perpetual stability.
Investment income comprises an average of 13 percent of total museum funding, though this varies sharply: art museums derive about 16 percent from investments, while science centers average just 2 percent. Museums that depend more heavily on endowment income face stronger pressure to maximize payout rates while still meeting the 'generational equity' principle—the concept that total return must exceed the effective distribution rate so future generations receive similar support levels.
Spending formulas and market volatility
Boards choose from three main approaches when translating policy rates into actual annual spending. The moving average method, used by most institutions, bases spending on the endowment's average market value over the past three years or trailing 12 quarters. This smooths market volatility but creates timing problems: a $100 million endowment could swing between $4.5 million and $6.8 million in annual spending over 30 years, depending on market conditions at the time of calculation.
The constant growth method separates spending from market fluctuations entirely. The board sets a base payout, then increases it each year by a fixed inflation rate, regardless of whether markets rose or fell. This produces stable budgeting but requires more conservative initial rates to preserve principal. Only a small share of institutions use this method because boards often prefer to respond to market performance.
Hybrid approaches blend both methods, typically allocating 60 to 80 percent of spending to constant growth and 20 to 40 percent to market-based adjustments. Over a 25-year horizon, maintaining a disciplined 4 percent payout actually generates more total cumulative spending than increasing the rate to 4.25 percent, because the slightly larger endowment compounds into more resources for distribution in later years.
“Total return must exceed the effective distribution rate so future generations receive similar support levels.”
When museums override the rules
Economic crises force boards to revisit standard spending policies. During the COVID-19 pandemic, the Metropolitan Opera withdrew nearly $30 million from its endowment in response to canceled performances and revenue collapse. The Guggenheim and San Francisco Museum of Modern Art chose staff reductions instead, accepting operational cuts to preserve endowment principal.
These choices illustrate why UPMIFA's seven-factor framework matters in practice. A museum can argue that economic emergency, organizational resources, and fund purpose together justify distributions above the policy rate. The law provides the justification; the board must stand behind the reasoning if questioned by regulators or donors.
Endowment growth and reserves
Major museums have grown their endowments substantially. The Metropolitan Museum of Art's endowment nearly doubled from $2.37 billion in 2013 to $4.22 billion in 2023. The Museum of Modern Art's endowment exceeded $1 billion by 2019. This growth has come largely through major philanthropic gifts rather than investment returns alone.
Beyond endowment spending, nonprofit reserves matter equally to institutional stability. A common goal for nonprofit reserve funds is 3 to 6 months of operating expenses. Four years after the COVID-19 pandemic, only about half of museum directors had rebounded to pre-pandemic attendance levels, suggesting ongoing challenges to institutional stability. This gap explains why boards might limit endowment spending even when UPMIFA would permit higher rates: they are building liquidity reserves to sustain operations through revenue downturns.
