Background: How Big the Sector Actually Is

According to the Internal Revenue Service, roughly 1.9 million nonprofit and philanthropic organizations are registered nationwide. Independent Sector, using Bureau of Economic Analysis figures, reports the sector added more than $1.5 trillion to GDP in 2024. The Federal Reserve Bank of Richmond, using the same BEA series, placed the nonprofit share of GDP at 5.3 percent as of the fourth quarter of 2024, slightly below its pre-pandemic level of about 5.5 percent.

Employment tells a similar story. The Bureau of Labor Statistics counted 12.8 million nonprofit jobs — close to 10 percent of private-sector employment — making the sector one of the largest employment categories in the country, larger than manufacturing.

But GDP contribution is not the same as revenue, and the distinction matters for the tax debate. BEA measures nonprofit output largely by what organizations spend, because the people they serve often do not pay for the service. Total nonprofit revenue is a much larger number: IRS Statistics of Income data compiled by the Tax Foundation put total 501(c)(3) revenues at more than $2.6 trillion as of 2019, with hospitals alone accounting for close to $1 trillion.

In simple terms: the sector’s “economic footprint” and the sector’s “money coming in the door” are two different measurements. Critics of the exemption focus on the second one.

How Much of GDP Is Tax-Exempt? No Agency Publishes the Answer

The single most important fact in this debate is that the U.S. statistical system does not measure the tax-exempt share of the economy. It measures something adjacent, and the difference is not a technicality.

Three numbers circulate in the policy literature, and they are not variations on the same estimate. They are the products of three incompatible methods:

5.3 percent of GDP. The Bureau of Economic Analysis figure for nonprofit institutions serving households (NPISH), fourth quarter 2024. This is the only official measure.
Roughly 12 percent of GDP. Total 501(c)(3) revenue divided by GDP, based on IRS Statistics of Income data compiled by the Tax Foundation.
About 15 percent of GDP. The figure Scott Hodge used to describe what he called America’s “$3.3 trillion tax-exempt economy” spanning more than 1.8 million organizations and over $8 trillion in assets.

The three-fold spread is not a rounding disagreement. Each number answers a different question, and neither the low end nor the high end is a defensible estimate of what the exemption actually covers.

SIDEBAR: Three Numbers, Three Methods

Method	What it actually measures	Result	What it leaves out
BEA national accounts (NPISH)	Value added by nonprofits serving households: employee compensation plus depreciation on owned assets.	5.3% of GDP (>$1.5T, 2024)	Tax-exempt entities that sell like businesses — credit unions, co-ops, mutual insurers, chambers of commerce — are booked as BUSINESS output. No operating surplus is counted, so the sector’s $238B in net income (2019) lands nowhere.
IRS revenue ÷ GDP	Total 501(c)(3) gross receipts divided by national output.	~12% of GDP	Compares gross receipts to value added. Double-counts inputs a nonprofit buys from taxable suppliers. Overstates the sector’s economic footprint.
Tax Foundation / Mercatus “tax-exempt economy”	All revenue across 1.8M+ exempt orgs holding $8T+ in assets; ~$2.8T of it commercial in character.	~15% of GDP	Same receipts-vs-value-added flaw. But it is the only measure that captures the commercially operating exempts BEA excludes — and the only one that prices the exemption (~$51B/yr forgone).

Sources: U.S. Bureau of Economic Analysis; IRS Statistics of Income via Tax Foundation; Mercatus Center (2025). Figures are not directly comparable.

Why the official 5.3 percent is a floor. BEA’s NPISH sector was never designed to capture tax-exempt organizations. It was designed to capture non-market production — services delivered to households without an economically meaningful price. Two exclusions follow from that design, and both cut against the number being read as “the tax-exempt share of the economy.”

First, BEA places the most commercially aggressive tax-exempt entities in the business sector, not the nonprofit sector. As BEA’s own NPISH definition makes clear — and as Independent Sector acknowledges in its methodology notes — NPISH excludes organizations that mainly serve businesses — chambers of commerce, trade and business associations — and it excludes tax-exempt entities such as cooperatives, credit unions and mutual financial institutions that sell goods and services in the same way as for-profit firms. BEA counts them as business output. The organizations at the center of the reform argument are, by definition, excluded from the statistic used to size the sector.

Second, BEA measures nonprofit value added as employee compensation plus the depreciation and rental value of the assets those organizations own and use. There is no operating surplus term. For a for-profit hospital, value added includes profit; for a nonprofit hospital, BEA’s convention assumes there is none to count. Yet IRS filings show the tax-exempt sector reported more than $238 billion in net income in 2019. That surplus is real money, and it is recorded in no sector’s value added.

In simple terms: the official 5.3 percent figure was built to measure charity, not commerce. It is the wrong instrument for the question Congress is now asking.

Why the 12 to 15 percent figures are a ceiling. The higher numbers are produced by dividing nonprofit revenue by GDP. That comparison is not valid, because GDP does not measure revenue — it measures value added, meaning revenue minus the cost of inputs bought from other firms.

The distortion is easy to see with a for-profit analogy. A large national retailer with roughly $680 billion in annual revenue would, on a revenue-to-GDP basis, appear to constitute more than 2 percent of the American economy on its own. It does not. Most of that revenue is the wholesale cost of goods it purchased from suppliers, and counting it as economic output would double-count those suppliers’ production. National accounts exist specifically to prevent that error.

Applying the same arithmetic to nonprofits produces the same overstatement. A nonprofit hospital’s patient revenue includes the cost of pharmaceuticals, medical devices and contracted services purchased from taxable companies whose output is already counted elsewhere in GDP.

This does not make the revenue figures useless. Gross receipts are the relevant base for a corporate income tax discussion in a way that value added is not — a hospital system’s tax liability, if it had one, would be calculated from its books, not from its BEA value-added line. But a revenue-to-GDP ratio should not be described as a share of the economy, and it frequently is.

What can be said with confidence. Stripped of both distortions, the defensible statements are narrow:

Tax-exempt organizations account for at least 5.3 percent of U.S. value added, and the true figure is higher because commercially operating tax-exempts are booked as business output and nonprofit surpluses are booked nowhere.
Tax-exempt organizations employ roughly 12.8 million people, close to 10 percent of the private-sector workforce — a measure that requires no value-added convention and is therefore harder to dispute.
Tax-exempt organizations take in gross receipts on the order of $2.6 to $3.3 trillion, of which Hodge estimates roughly $2.8 trillion is commercial in character. Against a U.S. economy of roughly $30.8 trillion in nominal GDP in 2025, that is a large share of national cash flow moving through entities outside the corporate income tax base — but it is not the same claim as “15 percent of the economy.”

The Bipartisan Policy Center reached the same underlying conclusion from the budget side: the Joint Committee on Taxation, Congress’s official scorekeeper, does not include the cost of most organizations’ exempt status in its annual tax expenditure report at all. The exemption is, in the formal federal accounts, unpriced.

That is the finding beneath the noise. The disagreement between 5 percent and 15 percent is not a fight between honest and dishonest analysts. It is what happens when a $30 trillion economy contains a major sector that no official measurement system was built to see.

The Policy: What Tax Exemption Actually Covers

Section 501(c)(3) of the Internal Revenue Code exempts organizations operated exclusively for religious, charitable, scientific, literary or educational purposes from federal income tax. Donations to most of them are deductible. Related exemptions cover social welfare groups, labor organizations, business leagues and social clubs under other subsections of 501(c).

Exemption is not absolute. Three carve-outs already exist:

Unrelated business income tax (UBIT). Nonprofits owe tax on profits from commercial lines of business unrelated to their exempt purpose.
Excise taxes. These include the tax on private college and university endowment investment income, the private foundation net investment income tax, and a 21 percent levy on compensation above $1 million paid by exempt organizations.
The community benefit standard. For hospitals, tax exemption is conditioned on serving the community — a standard set by the IRS, not by statute, because health care is not itself listed as a charitable purpose in the tax code.

The Bipartisan Policy Center, in a 2026 issue brief, notes that the Joint Committee on Taxation — Congress’s official scorekeeper for tax breaks — does not include the cost of most organizations’ exempt status in its annual tax expenditure report. That means the price tag of the exemption is, in a formal budget sense, largely unmeasured.

Where the Money Concentrates

IRS data indicate the largest tax-exempt organizations by revenue and assets are not the household-name charities most Americans picture. They are hospital systems, top-ranked universities, donor-advised fund sponsors such as Fidelity Charitable and Vanguard Charitable, and large membership organizations.

Program service revenue — patient billing, tuition, fees, ticket sales — made up 72 percent of overall nonprofit revenue in 2022, according to the Bipartisan Policy Center’s analysis of IRS data. Contributions, gifts and grants accounted for 23 percent. Investment income made up about 2 percent.

Scott Hodge, a tax and fiscal policy fellow at Arnold Ventures and former president of the Tax Foundation, argued in an October 2025 Mercatus Center brief that nonprofits earn roughly $2.8 trillion in commercially generated income that goes untaxed, which he estimated at about $51 billion a year in forgone federal revenue. Hodge acknowledged the exercise required subjective judgment and that other researchers would reach different results. A 2022 Tax Policy Center study by Nathan Born and Adam Looney reached a far smaller figure, valuing the income tax exemption for 501(c)(3) through 501(c)(8) organizations at $21 billion in 2018.

The organizational view. Aggregate figures obscure what the exemption looks like inside a single organization. NexfinityNews examined that question in June 2026 in an analysis of the American Diabetes Association’s finances. The ADA reported $157 million in revenue and $134 million in expenses in fiscal year 2024. Pharmaceutical and device manufacturers contributed more than $134 million between 2017 and 2024 — roughly 20 percent of the organization’s funding over that period — while the ADA publishes the Standards of Care in Diabetes, the reference document most U.S. clinicians use to treat the disease.

That case illustrates a dimension of the exemption debate the GDP figures cannot capture. The questions raised about the ADA were not about the scale of its commercial revenue; they were about the relationship between its funders and its influence, and about what its spending allocation revealed about its priorities. The available record did not establish that donations caused higher insulin prices or that the organization deliberately deprioritized prevention — and it is worth stating that plainly. But it did establish that a tax-exempt organization can hold significant regulatory-adjacent influence while drawing a fifth of its budget from the industries that influence touches.

Section 501(c)(3) does not distinguish that organization from a food bank, and no macroeconomic statistic would flag the difference. The measurement gap described above is one half of the problem. The other half is that even a perfectly measured sector would still be governed by a single, undifferentiated category in the tax code.

The Hospital Fight

Nonprofit hospitals are the sharpest flashpoint. The CRS report published March 30, 2026 reviewed estimates placing the value of hospitals’ tax exemption at roughly $12 billion in 2021 and $10 billion in 2022, and outlined possible changes including minimum charity care requirements, enhanced IRS oversight and new taxes on hospital assets.

The industry disputes the framing. An EY analysis prepared for the American Hospital Association found that in 2022, tax-exempt hospitals reported $149 billion in total community benefits against $13.2 billion in federal tax exemption — a ratio of roughly $11 in benefit for every $1 in federal tax forgone. Critics counter that the Schedule H categories counted as “community benefit” include items such as unreimbursed Medicaid costs and health professions education, not just free care for patients who cannot pay.

Six states — Illinois, Nevada, Oregon, Pennsylvania, Texas and Utah — have already enacted minimum community benefit requirements of their own, with Illinois and Utah requiring hospitals to contribute at least the equivalent of the property taxes they would otherwise owe.

What Changed in the 2025 Tax Law

The One Big Beautiful Bill Act, signed July 4, 2025, made several changes now taking effect:

Endowment tax. The flat 1.4 percent excise tax on private college endowment investment income was replaced with a tiered structure ranging from 1.4 percent to 8 percent, with the top rate hitting institutions holding more than $2 million in endowment assets per student. The threshold for the tax now requires at least 3,000 tuition-paying students, up from 500 — exempting many smaller schools.
Executive compensation. The 21 percent excise tax on pay above $1 million now applies to all current and former employees of an exempt organization, not just the five highest paid. Effective for tax years beginning after December 31, 2025.
Donor-side floors. Starting in the 2026 tax year, itemizers may deduct charitable contributions only to the extent they exceed 0.5 percent of adjusted gross income. Corporations face a 1 percent floor.
A universal deduction returns. Also starting in 2026, taxpayers who take the standard deduction may deduct up to $1,000 (individuals) or $2,000 (joint filers) in cash gifts — reaching roughly 90 percent of filers who do not itemize.

Proposals that did not survive the final bill included a steeply graduated tax on private foundation investment income and new UBIT exposure for name-and-logo royalties.

Analysis: Two Arguments, One Blurred Line

The case for reform rests on tax neutrality. If a nonprofit hospital and a for-profit hospital bill the same insurer for the same procedure, reform advocates argue, the tax code should not hand one of them a structural cost advantage. The federal deficit outlook sharpens the point: the Bipartisan Policy Center concluded that lawmakers in both parties are “correct to scrutinize” the largest players in the sector, while cautioning that any reforms require care.

The case against rests on function and fragility. Nonprofits deliver services the market will not price and government does not directly provide, and the sector is not flush. The Nonprofit Finance Fund’s 2025 survey found 81 percent of organizations struggled to raise enough to cover costs and 36 percent ended their most recent fiscal year with an operating deficit. Roughly one-third held less than three months of cash. Total charitable giving hit a nominal record of $592 billion in 2024, per Giving USA, but the number of donors continued to fall.

Both arguments can be true at once, which is why the policy fight increasingly centers not on whether to tax nonprofits but on where to draw the line between them. A food bank and a hospital system with $1 billion in patient revenue occupy the same section of the tax code. Nothing about that section currently distinguishes them by scale, by commercial intensity, or by how much of their revenue looks like ordinary business income.

Public opinion complicates any sweeping move. Independent Sector’s trust research found 57 percent of Americans reported high trust in nonprofits in 2024, against 43 percent for small businesses and 18 percent for the federal government — the least-trusted institution measured. Broad reform aimed at hospital systems and university endowments would land, politically, on a sector the public still likes.

Conclusion

The nonprofit exemption was built in an era when charities were small, donative and clearly distinguishable from commerce. The sector that exists in 2026 is a $1.5 trillion contributor to GDP, employs one in ten private-sector workers, and earns most of its money the way a business does — by selling a service.

Congress has begun to respond at the edges: endowments, executive pay, hospital charity care, donor deduction floors. Whether it goes further will depend less on the headline size of the sector than on whether lawmakers can define, in statute, what separates a charity from a tax-exempt business.

Key Takeaways

No federal agency publishes the tax-exempt share of GDP. Estimates in circulation range from 5.3 percent to 15 percent, and the three-fold spread reflects three incompatible methodologies, not analytical disagreement.
The official BEA figure — 5.3 percent of GDP, over $1.5 trillion in 2024 — is a floor. BEA classifies commercially operating tax-exempts (credit unions, cooperatives, business leagues) as business output, and its nonprofit value-added measure counts no operating surplus, even though the sector reported $238 billion in net income in 2019.
The 12 to 15 percent figures are a ceiling. They divide gross revenue by GDP — a comparison national accounts are specifically designed to prevent, because GDP measures value added, not receipts.
Employment is the cleanest measure: roughly 12.8 million nonprofit jobs, close to 10 percent of private-sector workers.
Program service revenue (tuition, patient billing, fees) accounted for 72 percent of nonprofit revenue in 2022 — most of the sector’s money is earned the way a business earns it.
The Joint Committee on Taxation does not score most of the exemption’s cost, leaving estimates to outside researchers — ranging from $21 billion (Tax Policy Center, 2018) to about $51 billion a year (Mercatus, 2025).
Nonprofit hospitals are the central battleground. CRS reviewed estimates of $10–12 billion in annual exemption value; the AHA counters with $149 billion in reported community benefit.
The 2025 tax law raised the university endowment tax to as high as 8 percent, broadened the 21 percent excise tax on $1 million-plus compensation, and added a 0.5 percent AGI floor on itemized charitable deductions beginning in 2026.
Nonprofits remain the most trusted institution measured in the U.S. — 57 percent high trust — which constrains how aggressively lawmakers are likely to move.

Sources

Independent Sector, “Health of the U.S. Nonprofit Sector” (2025) — BEA and IRS data; sector GDP contribution and trust figures.
Independent Sector, Economy & Finance data hub — over $1.5 trillion contributed in 2024; funding-mix breakdown.
U.S. Bureau of Economic Analysis, “Nonprofit Institutions Serving Households (NPISHs)” glossary — definition excluding business-serving nonprofits.
U.S. Bureau of Economic Analysis, “Households and Institutions Sector” glossary — sectoring conventions.
Federal Reserve Bank of Richmond, “How Big Is the Nonprofit Sector?” — 5.3% of GDP, Q4 2024; employment estimates.
Congressional Research Service, “Nonprofit Hospitals, Tax Benefits, and Charity Care,” IF13192 (March 30, 2026) — community benefit standard and reform options.
Bipartisan Policy Center, “The U.S. Tax-Exempt Sector, Explained” (2026) — JCT scoring gap; 72% program service revenue.
Scott Hodge, “Nonprofit Businesses and the Leaky Bucket of US Tax Policy,” Mercatus Center (Oct. 14, 2025) — $2.8 trillion in untaxed commercial income; ~$51 billion/year forgone.
Tax Foundation, “501(c)(3) Nonprofit Revenue Data” — IRS Statistics of Income; $2.6 trillion in total revenues (2019).
American Hospital Association / EY, “Nonprofit Hospitals’ Value to Communities 11 Times Their Federal Tax Exemption” (Nov. 17, 2025) — $149 billion in community benefit vs. $13.2 billion forgone.
Committee for a Responsible Federal Budget, “The Federal Tax Benefits for Nonprofit Hospitals” — state minimum community-benefit requirements; KFF and Johns Hopkins estimates.
Internal Revenue Service, “Charitable Hospitals — General Requirements for Tax-Exemption Under Section 501(c)(3)” — the community benefit standard.
Internal Revenue Service, Charities and Nonprofits — 501(c) categories and post-OBBBA guidance.
Withum, “Changes Affecting Not-for-Profit and Other Tax-Exempt Organizations in New Tax Law” — OBBBA endowment tax, Section 4960, 0.5% AGI floor.
Fidelity Charitable, “One Big Beautiful Bill: Impact on Charitable Giving” — donor-side deduction changes effective 2026–2027.
National Council of Nonprofits, analysis of the 2025 tax legislation — provisions enacted and provisions dropped.
Nonprofit Finance Fund, 2025 National State of the Nonprofit Sector Survey — 81% struggled to cover costs; 36% ran an operating deficit.
Giving USA, 2025 annual report (2024 data) — $592 billion in total charitable giving.

Related Coverage from NexfinityNews

Inside the American Diabetes Association’s Finances: Corporate Funding, Spending Priorities, and Conflict-of-Interest Questions — What the exemption looks like inside one $157 million health nonprofit.
Ideology or Industry? Why a Hunger Advocate Wouldn’t Concede That Soda Is Unhealthy — How funding relationships shape what nonprofits will and won’t say.
Inside the Fight Over ActBlue’s Fraud Controls — Oversight questions at a tax-exempt entity moving billions in donations.