How big is philanthropy, really, next to the US federal government — and where does private giving actually matter?
A US-only comparison: federal budget vs American private giving. For the global public sector — the UN system, the Global Fund, foreign aid — see Global Aid.
Set all US private giving (~$590B) next to the $6.8 trillion federal budget and it looks tiny. But most of that budget is things philanthropy can't and doesn't do: Social Security, Medicare/Medicaid, defense, and interest on the debt — automatic entitlements and obligations, not grantmaking. Strip those out and the comparable bucket is non-defense discretionary spending (~$960B) — research, health programs, education, foreign aid, the environment. Against that, all US giving is about two-thirds the size.
The same point in one line: even the entire private sector gives about 2% of GDP, against ~3.3% for federal non-defense discretionary. Foundations alone — the institutional money, which is what funds most science, research and large-scale causes — are only ~0.4% of GDP, and the dozen biggest combined are a rounding error.
In aggregate the totals are comparable — but field by field the balance flips completely. Government owns the things only it can do at scale (science, health research, the environment, foreign affairs). Philanthropy owns religion and the arts almost entirely, and meets government in the middle on education and human services.
Read top to bottom it's a clean gradient. At the top, the fields private giving owns almost alone: religion (essentially all philanthropy), arts & culture (~11× federal), and higher education — university and college gifts (~$61B) run more than double federal student aid. In the middle, where the two are matched or government leans: US health & research, human services, global aid, K-12 & other education (government-leaning — Title I, special ed), and environment & water (private climate & conservation giving is ~half the federal total). At the bottom, the fields government owns almost alone — basic science (NSF/DOE), space (NASA), parks & public lands, community development, law enforcement & justice (~$80B federal, plus ~$300B+ state & local), veterans, and transportation. Education is the sharpest inversion: private money pours into universities while federal money funds K-12 and student access — opposite layers of the same field. (And the two green-adjacent federal lines — environment & water plus parks & public lands — total ~$58B, mostly parks, public lands and water; EPA pollution control is only ~$13B of it.)
The starkest single contrast is research: within US Health & Research, NIH alone (~$48B) outweighs all US foundation science giving (~$5B) by roughly 10× — and that giving is almost entirely foundations; individuals fund essentially no basic research.
Seen as composition — where each side's dollars actually go — the asymmetry is starker still. Government's discretionary money is anchored by a large unitemized remainder and veterans' health care (~$135B), with NASA (~$25B) and basic science (~$17B) as small but uniquely public slabs that have essentially no private analogue. Philanthropy's column is anchored by religion (~$147B), which government barely touches. The fields that show up in both — education, health, international, environment — are the genuine overlap, and even there the two fund different things under the same label: government buys research and aid; philanthropy tilts toward direct services and institutions.
"Philanthropy" is not one actor. Split the private column by where the money comes from and the sectors pull apart sharply. Individuals — ~64% of all giving — carry religion almost single-handedly: it is the destination foundations and corporations barely touch. Foundations tilt to education and health; corporations to community and health; bequests flow heavily into foundations and university endowments. The institutional dollar and the household dollar go to genuinely different places.
One caveat matters, though: this split is modeled, not measured. Giving USA reports giving by source and by recipient as two independent totals and never links them — no one publishes which source funds which sector. The chart below reconstructs it: the foundation, corporate and bequest rows use published cause-area distributions (Candid, CECP, IRS SOI), individual giving is derived as the residual, and both margins are reconciled to Giving USA's totals. Treat it as an illustration of shape, not a measurement of any single number.
Because philanthropy is small relative to government in most fields, its leverage comes not from scale but from filling gaps the state leaves — funding what's politically hard, unproven, or newly abandoned. The sharpest example is happening now: the 2025 dismantling of USAID withdrew roughly $40 billion of foreign aid in a single year — several times the entire annual payout of the Gates Foundation.
No foundation, or coalition of them, can backfill a hole that size. But in the specific programs that were cut, a few billion in private global-health funding can preserve a meaningful share of the work. That's the pattern across the board: philanthropy is a junior partner where it overlaps with core public funding, and pivotal at the margin where public funding is thin or vanishing. Concentration of giving raises the stakes on getting those marginal bets right. And everything on this page is the US picture only — the same question at world scale, where governments fund aid through the UN system, the Global Fund and Gavi, plays out on the Global Aid page.
This page is the US federal picture. Globally, governments fund aid through bilateral agencies and multilaterals — the UN system, the Global Fund, Gavi — and 2025 rewrote that map. Or follow the private money into foundations and DAFs.