U.S. Nonprofit Red Flags:
7 Warning Signs Backed by 990 Data

Not every red flag means a nonprofit is badly run. Context matters — a grantmaking foundation will naturally have a low program expense ratio, and a startup nonprofit may carry negative net assets for years while building capacity. But these seven metrics, drawn from publicly filed IRS Form 990 data, are the warning signs that experienced donors, board members, and watchdog organizations look for when evaluating U.S. nonprofits.

The program expense ratio — the share of total expenses dedicated to mission-related activities — is the most widely cited nonprofit efficiency metric. IRS Form 990 Part IX breaks expenses into three categories: program services, management & general, and fundraising. When an organization spends less than 50% on programs, it means the majority of its budget goes to overhead.

The sector variation is significant. Human services organizations, which deliver direct services, have one of the lowest flagged rates at 15.7%. Community improvement and employment organizations fall in the middle. The median program expense ratio across all sectors is 79.5%, so the 50% threshold captures organizations well below average rather than those that are merely below median.

IRS Form 990 Part VII discloses compensation for officers, directors, and key employees. When a single executive's pay consumes a disproportionate share of the organization's budget, it raises questions about governance and resource allocation. The IRS uses a "rebuttable presumption of reasonableness" standard — compensation must be comparable to similar organizations.

This red flag is overwhelmingly a small-organization phenomenon. At sub-$1M nonprofits, a $100,000 CEO salary can easily represent 20–40% of total expenses. At a $25M+ organization, even a $500,000 salary is only 2% of the budget. Board members at smaller nonprofits should pay particular attention to the ratio of executive pay to total expenses, not just the dollar amount in isolation.

A single-year revenue drop of 25% or more can signal donor attrition, loss of a major grant, or a fundamental shift in an organization's funding model. While some volatility is normal — especially for organizations dependent on one-time gifts or government contracts — steep declines often precede deeper financial distress.

Philanthropy & voluntarism organizations (34.9%) and environment organizations (25.7%) had the highest decline rates from 2022 to 2023 — likely reflecting one-time large gifts or grant cycles that inflated 2022 numbers. International (25.0%) and healthcare (23.8%) organizations also saw above-average declines. Revenue volatility is an important signal even when the decline has a benign explanation: it indicates concentration risk in the organization's funding base.

When a nonprofit's total liabilities exceed its total assets (Part X of Form 990), it reports negative net assets — the nonprofit equivalent of being "underwater." While this doesn't necessarily mean the organization will shut down, it signals serious financial stress and limited ability to weather unexpected costs or revenue shortfalls.

Housing & shelter organizations have the highest rate of negative net assets at 20.4% — nearly five times the overall average. This is partly structural: many housing nonprofits carry mortgage debt that exceeds the book value of their properties. Mental health (7.2%) and healthcare (6.5%) organizations also show elevated rates, often due to capital-intensive operations financed with debt.

Administrative expenses — management salaries, office costs, accounting, legal fees, and other non-program spending — are reported on Form 990 Part IX. While some administrative spending is necessary and even beneficial, an admin expense ratio above 25% puts an organization well above the median of 3.7% and warrants scrutiny.

Arts & culture (18.9%), religion (18.4%), and housing & shelter (18.1%) organizations are most likely to exceed the 25% admin threshold. The rate decreases with budget size — 13.7% of sub-$1M organizations trigger this flag vs. 6.4% of $25M+ organizations, reflecting economies of scale in larger operations.

Operating reserves — the financial cushion an organization holds to cover expenses during revenue gaps — can be approximated by comparing net assets to annual expenses. Organizations with less than three months of expenses in net assets (a reserves ratio below 0.25) are operating with minimal margin for error.

When an organization with less than $500,000 in annual revenue pays a single individual more than $100,000, it raises questions about whether compensation is reasonable. While not inherently wrong — a part-time medical director or specialized consultant could justify such pay — the ratio of individual compensation to organizational revenue is a signal worth investigating.

This pattern can indicate several scenarios: a winding-down organization still paying executives at historical rates, a startup that hasn't yet grown into its cost structure, or a genuinely problematic allocation of limited resources. Board members should document the comparability analysis and business justification for any compensation that exceeds 20% of total revenue.

A single red flag often has an innocent explanation. Multiple red flags appearing together is a much stronger signal. Using tax year 2024 data, we tested how often organizations trigger multiple warning signs simultaneously — using three core metrics: program ratio below 50%, admin ratio above 25%, and negative net assets.

Red flags are screening tools, not verdicts. Every metric above has legitimate exceptions. The goal is not to disqualify organizations based on a single number but to identify where further investigation is warranted. Here is how different audiences can use this data: