Estimated Increases in Taxes on Net Investment Income for US-Based 501(c)(3) Private Foundations

Note: Please scroll to the bottom of this page for important disclaimers and explanations of this data.

By State

About this Data

Candid created this file, that contains the most recently reported net investment income tax figures from US-based 501(c)(3) private foundations by state and proposed tax brackets (based on reported fair market value assets), plus estimates for taxes based on the proposed levels and the difference between the current and proposed dollars.

How should this data be interpreted?

At the national level:

Were the proposed tax rates in place for the fiscal years in the filings we are using for our analyses, 3,414 US-based 501(c)(3) private foundations would see their taxes increase from $805 million to $3.71 billion, an increase of about $2.90 billion dollars.

The 27 largest foundations—those with $5 billion or more in assets as per their most recent filing—would see their net investment income taxes increase from $302 million to $2.18 billion, an increase of about $1.88 billion dollars, which represents about 63% of the $2.91 billion overall increase.

Please note that these are estimates based on available information, not projections. Figures are net investment income taxes only, not the total taxes owed by private foundations; other taxes may apply.

At the State level:

Please reference the information in the "Estimated Tax Change" table to look at the specific State, below is an narrative example for the State of California: Were the proposed tax rates in place for the fiscal years in the filings we are using for our analyses, 471 California based 501(c)(3) private foundations would see their taxes increase from $155 million to $758 million, an increase of about $603 million dollars.

The 8 largest foundations—those with $5 billion or more in assets as per their most recent filing—would see their net investment income taxes increase from $66 million to $474 million, an increase of about $408 million dollars, which represents about 68% of the $603 million overall increase.

Please note that these are estimates based on available information, not projections. Figures are net investment income taxes only, not the total taxes owed by private foundations; other taxes may apply.

Methodology

The current analysis is based on the most recent available filings from active 501c3 990-PF filers. Candid first confirmed that the foundations are still currently active (listed on any IRS Business Master File in calendar year 2024) and then included data from their most recent tax file since 2020. 85% of the filings come from FYE 2023 (the most recent year of comprehensive data). However, to allow for data lag issues due to differences in fiscal year ends and tax extensions, filing informaton was also used from 2020, 2021, 2022, or 2024 if that was an organization's most recent available information).

Data is organized by Estimated Tax Increase (Delta) from highest to the lowest. Estimates are calculated like this:
(Current Taxes [990-PF Part V Line 5] ÷ 0.0139 [current tax rate]) × [new proposed tax rate based on assets; 0.0139, 0.0278, 0.050, or 0.100]

Have questions about this file?

For questions, please contact partnerships@candid.org.