International Sustainable Energy Foundation

Analysis

International Sustainable Energy Foundation is a registered charity in United States, based in Austin, TX. It received its IRS tax-exemption ruling in October 2021, 5 years ago. Its declared purposes cover environment, which this site groups under environment and conservation. The IRS classifies it as a publicly supported organisation (donations from the general public) under section 501(c)(3), and contributions to it are listed as tax-deductible.

In the financial year ending December 2023, International Sustainable Energy Foundation reported income of $36.9m and spending of $23.3m, leaving 37% of income unspent that year. Across the 2 years on record, from December 2022 to December 2023, income grew from $24.2m to $36.9m (+52%), an average of +52% a year. The sharpest change came in the year to December 2023, when income rose by 52%. Over the whole period it spent 40% of the income it received.

Among 10,430 United States charities whose main cause is environment and conservation and that reported income, International Sustainable Energy Foundation sits at the 99th percentile: it is one of the largest 1% in its cause. Against every charity in United States with reported income it ranks in the 98th percentile, and in the 99th percentile within TX. Charities of a similar size with the same main cause include Center for International Forestry Research ($35.9m), Cincinnati Nature Center Association ($36.9m) and Elemental Excelerator Inc ($35.7m).

On its Form 990 for the period ending December 2023, revenue came from contributions and grants 99% of the total. Compensation of current officers, directors and key employees was $75k (0.3% of expenses). Other salaries and wages came to $124k. At year end it held assets of $45.2m against liabilities of $8.8m, net assets of $36.4m. It reported 3 employees.