Liabilities / Assets
59th percentile
Higher debt load relative to assets than 59% of similar nonprofits.
Us Sif Foundation
EIN 22-2989704 • 501(c)3 • Washington, DC
Profile
The us sif foundation's mission is to rapidly shift investment practices towards sustainability, focusing on long-term investment and the generation of positive social and environmental impacts. It undertakes educational, research and programmatic activities in support of us sif: the forum for sustainable and responsible investment, its sole member.
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.12x
Liabilities / Revenue
73rd percentile
Higher debt load relative to revenue than 73% of similar nonprofits.
Net Margin
9th percentile
Higher net margin than 9% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
8th percentile
Faster asset growth than 8% of similar nonprofits.
Revenue Growth
6th percentile
Faster revenue growth than 6% of similar nonprofits.
Balance Sheet
Assets
Down$1,228,513
Down $328,326 (-21%) from 2023
Liabilities
Down$149,294
Down $144,184 (-49%) from 2023
Net Assets
Down$1,079,219
Down $184,142 (-15%) from 2023
Revenue
Down$502,062
Down $388,337 (-44%) from 2023
Expenses
Up$686,204
Up $62,681 (+10%) from 2023
Net Income
Down-$184,142
Down $451,018 (-169%) from 2023
Trend Graphs
Filings
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
- Assets
- $1,228,513
- Liabilities
- $149,294
- Net assets
- $1,079,219
- Revenue
- $502,062
- Expenses
- $686,204
- Net income
- -$184,142
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Jan 1, 2024 to Dec 31, 2024
- Signed
- Oct 20, 2025
- Return Version
- 2024v5.2
- Gross Receipts
- $502,062
Mission and Program Overview
Mission
The us sif foundation's mission is to rapidly shift investment practices towards sustainability, focusing on long-term investment and the generation of positive social and environmental impacts. It undertakes educational, research and programmatic activities in support of us sif: the forum for sustainable and responsible investment, its sole member.
Educational, research, and programmatic activities in support of us sif.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Savings and Temporary Cash Investments | $1,556,839 | $1,122,683 | ▼ $434,156 |
| Land, Buildings, and Equipment, Net | $0 | $105,405 | ▲ $105,405 |
| Accounts Receivable | $0 | $425 | ▲ $425 |
| Total Assets | $1,556,839 | $1,228,513 | ▼ $328,326 |
| Liabilities | |||
| Other Liabilities | $293,478 | $111,286 | ▼ $182,192 |
| Accounts Payable and Accrued Expenses | - | $38,008 | - |
| Total Liabilities | $293,478 | $149,294 | ▼ $144,184 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $1,163,361 | $1,079,219 | ▼ $84,142 |
| Net Assets With Donor Restrictions | $100,000 | $0 | ▼ $100,000 |
| Total Net Assets Fund Balance | $1,263,361 | $1,079,219 | ▼ $184,142 |
| Total Liabilities and Net Assets / Fund Balance | $1,556,839 | $1,228,513 | ▼ $328,326 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Other Land Buildings | $105,405 | $17,001 | $122,406 |
Compensation and Service Providers
Board Members and Trustees
| Name | Title |
|---|---|
| Diederik Timmer | Chair |
| Iyassu Essayas | Vice Chair |
| Anthony Eames | Board Member |
| Daniel Hanson | Board Member |
| Elizabeth Levy | Board Member |
| Julie Gorte | Board Member |
| Kiley Miller | Board Member |
| Linda-eling Lee | Board Member |
| Mamadou-abou Sarr | Board Member |
| Stephanie Cohn Rupp | Board Member |
| Bryan Mcgannon | Managing Director |
| Maria Lettini | CEO (chief Executive Officer) |
| Kimberly Gluck | Treasurer |
Highest Paid Contractors
| Contractor | Services | Location | Compensation |
|---|---|---|---|
| Brand 42 LLC | Website Redesign & Redevelopment | ADGE GITTINS BERMONDSEY STUDIOS 3 M, London, LONDON, Uk | $104,160 |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $493,000
- Program Service Revenue
- $6,897
- Investment Income
- $2,165
- Other Revenue
- $0
- All Other Contributions
- $493,000
- Change in Net Assets
- $-184,142
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $450,001 |
| Other Expenses | $236,203 |
| Total Fundraising Expense | $104,131 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $229,639 | $97,734 | $58,566 | $385,939 |
| Fees for Services Other | $75,255 | $32,030 | $19,193 | $126,478 |
| Occupancy | $27,621 | $11,755 | $7,045 | $46,421 |
| Payroll Taxes | $16,615 | $7,071 | $4,237 | $27,923 |
| Other Employee Benefits | $12,356 | $5,259 | $3,151 | $20,766 |
| Office Expenses | $10,694 | $4,551 | $2,728 | $17,973 |
| Depreciation Depletion | $10,116 | $4,305 | $2,580 | $17,001 |
| Pension Plan Contributions | $9,147 | $3,893 | $2,333 | $15,373 |
| Information Technology | $5,315 | $2,262 | $1,354 | $8,931 |
| Conferences and Meetings | $4,093 | $1,742 | $1,045 | $6,880 |
| Travel | $1,434 | $610 | $366 | $2,410 |
| Insurance | $1,340 | $570 | $342 | $2,252 |
| Advertising | $143 | $61 | $36 | $240 |
| Other Expenses | $104 | $44 | $26 | $174 |
| Total Functional Expenses | $408,301 | $173,772 | $104,131 | $686,204 |
International Activity
International Summary
- Offices
- 0
- Employees
- 0
- Spending
- $143,017
International Compliance
- Activity in boycott countries
- No
- Foreign corporation ownership
- No
- Foreign partnership interest
- No
- Interest in foreign trust
- No
- Passive foreign investment company interest
- No
- Transfers to foreign corporations
- No
International Activities
| Region | Activity | Services | Offices | Employees | Spending |
|---|---|---|---|---|---|
| Europe (including Iceland & Greenland) | Compensation for the Service | Design and Dvelopment of a New Website | 0 | 0 | $104,160 |
| Europe (including Iceland & Greenland) | Compensation for the Service | CONTRACTOR WILL JOINTLY ADVANCE THE "TRENDS REPORT" BY USING CONTRACTORS' PRE-EXISTING FINANCIAL DATA SCIENCE CAPABILITIES. | 0 | 0 | $38,857 |
Fundraising, Events, and Gaming
- Fundraising activities
- No
- Gaming activities
- No
- Professional fundraiser used
- No
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
Political and Lobbying Activity
- Political campaign activity
- No
- Lobbying activity
- No
- Subject to proxy tax
- No
Debt and Bond Financing
Other Reported Liabilities
| Liability | Amount |
|---|---|
| Due to US Sif | $111,286 |
Governance and Compliance
Governance Checklist
- Compiled or reviewed by an accountant
- No
- Annual disclosure for covered persons
- Yes
- Audit committee
- Yes
- Business relationship with 35% controlled entity
- No
- Business relationship with family members
- No
- Business relationship with organization members
- No
- Material changes to governing documents
- No
- Compensation from other sources disclosed
- No
- CEO compensation reviewed
- No
- Other officer compensation reviewed
- No
- Conflict-of-interest policy
- Yes
- Audited financial statements prepared
- Yes
- Key decisions subject to board approval
- Yes
- Management duties delegated
- No
Governance Explanations
Form 990, Part VI, Section A, Line 6
“The sole member is the us sif: the forum for sustainable and responsible investment - as stated in the bylaws.”
Form 990, Part VI, Section A, Line 7A
“Us sif: the forum for sustainable and responsible investment is the sole member of us sif foundation and is responsible for the foundation's governance.”
Form 990, Part VI, Section A, Line 7B
“Us sif: the forum for sustainable and responsible investment is the sole member of us sif foundation and is responsible for the foundation's governance.”
Form 990, Part VI, Section B, Line 11B
“The draft 990 is sent to the audit committee for their review. After that review is completed, the return is sent to the full governing body prior to filing the form with the irs.”
Form 990, Part VI, Section B, Line 12C
“Each director shall provide an annual disclosure statement to the organization identifying: (i) each organization for which the director is a director or executive (or holds an equivalent position) or by which the director is employed, and (ii) each investment, interest, volunteer activity, membership or other matter that may conflict or interfere with the director's position on the board or that may cause a conflict of interest between the director's duty to the organization and the investment, interest, activity, membership or matter. (iii) any conflict of interest identified by the directors or the absence of any conflict of interest to the best of knowledge of the directors.”
Form 990, Part VI, Section C, Line 19
“The organization's audited financial statements are available to the public online as part of the organization's annual report. Governing documents, conflict of interest policy and form 990 are available to members through an online member center, and to the general public upon request. Recent 990's for the organization are also available at www.guidestar.org.”
Filing and Contact Details
Filer
- Filer Name
- US Sif Foundation
- EIN
- 22-2989704
- Phone
- 2028725361
- Address
- 1660 L STREET NW 306, WASHINGTON, DC 20036
Signing Officer
- Name
- Maria Lettini
- Title
- CEO (chief Executive Officer)
- Phone
- 2028725361
- Signed
- 2025-10-20
- Discuss with paid preparer
- Yes
Organization Details
- Principal Officer
- Maria Lettini
- Formed
- 1989
- Legal Domicile
- Ma
- Voting Board Members
- 11
- Independent Board Members
- 11
- Employees
- 0
- Volunteers
- 11
Preparer
- Firm
- Sikich LLC
- Address
- 333 JOHN CARLYLE STREET SUITE 500, ALEXANDRIA, VA 22314
- Preparer
- Jill M Boyle CPA
- Phone
- 7038361350
Supplemental Narrative
Additional Explanations
Form 990, Part IX, Line 11G
“Consulting -media: program service expenses 8,709. Management and general expenses 3,708. Fundraising expenses 2,221. Total expenses 14,638. Consulting -program: program service expenses 50,237. Management and general expenses 21,381. Fundraising expenses 12,812. Total expenses 84,430. Other: program service expenses 16,309. Management and general expenses 6,941. Fundraising expenses 4,160. Total expenses 27,410.”
FORM 990, PART XII, LINE 2C:
“The board of directors assume responsilbility for oversight of the audit and selection of an independent accountant. This process has not changed from prior year.”
Financial Statement Notes
PART X, LINE 2:
“Us sif is exempt from federal and local income taxes under section 501(c)(6) of the internal revenue code on income derived from activities related to their exempt purpose. The foundation is exempt from federal and local income taxes under section 501(c)(3) of the internal revenue code on income derived from activities related to their exempt purpose. Us sif and the foundation are not private foundations for tax purposes. The organization is not aware of any activities that would jeopardize their tax-exempt status that would require recognition in the accompanying consolidated financial statements. Generally, tax returns are subject to examination by taxing authorities for up to three years from the date a completed return is filed. If material omissions of income exist, tax returns may be subject to examination for up to six years. As of december 31, 2024, the organization had no uncertain tax positions which should be recognized as a liability. The organization is no longer subject to u.s. Federal or state examinations by tax authorities for tax years prior to 2021.”
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 338250 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 159650 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | CEO (CHIEF EXECUTIVE OFFICER) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | MANAGING DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1989 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 11 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 502062 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 11 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 1354 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 2262 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 5315 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 8931 |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 342 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 570 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 1340 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 2252 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 2165 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 2165 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 17001 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 0 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 105405 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 122406 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | THE US SIF FOUNDATION'S MISSION IS TO RAPIDLY SHIFT INVESTMENT PRACTICES TOWARDS SUSTAINABILITY, FOCUSING ON LONG-TERM INVESTMENT AND THE GENERATION OF POSITIVE SOCIAL AND ENVIRONMENTAL IMPACTS. IT UNDERTAKES EDUCATIONAL, RESEARCH AND PROGRAMMATIC ACTIVITIES IN SUPPORT OF US SIF: THE FORUM FOR SUSTAINABLE AND RESPONSIBLE INVESTMENT, ITS SOLE MEMBER. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1263361 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1079219 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1163361 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1079219 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 7045 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 11755 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 27621 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 46421 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 2728 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 4551 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 10694 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 17973 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 3151 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 5259 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 12356 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 20766 |
| IRS990/OtherExpensesGrp/Desc | 0 | FINANCIAL SERVICES FEES |
| IRS990/OtherExpensesGrp/Desc | 1 | RECRUITMENT |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 1129 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 26 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 1885 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 44 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 4429 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 104 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 7443 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 174 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 293478 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 111286 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 58566 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 97734 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 229639 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 385939 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 4237 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 7071 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 16615 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 27923 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 2333 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 3893 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 9147 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 15373 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | MARIA LETTINI |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | EDUCATIONAL SERVICES |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | PUBLICATIONS |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 3680 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 3217 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 3680 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 3217 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 814565 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 2386 |
| IRS990/PYOtherExpensesAmt | 0 | 238880 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 73448 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 266876 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 384643 |
| IRS990/PYTotalExpensesAmt | 0 | 623523 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 890399 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -184142 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 1 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 6897 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 1556839 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 1122683 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/Contribution35ControlledInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionControllerInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionFamilyInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ControlledDisqualifiedPrsnInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnControllIntInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnOwnrIntInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ExcessBusinessHoldingsRulesInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ListedByNameGoverningDocInd | 0 | 1 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/LoanDisqualifiedPersonInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/OrganizationChangeSuprtOrgInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/PaymentSubstantialContribtrInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgNotOrganizedUSInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgQualifiedInd | 0 | 1 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgSectionC456Ind | 0 | 1 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportNonSupportedOrgInd | 0 | 0 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SuprtExclusivelySec170c2BInd | 0 | 1 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SuprtOrgNoIRSDeterminationInd | 0 | 1 |
| IRS990ScheduleA/Form990SchAType1SuprtOrgGrp/OperateBenefitNonSuprtOrgInd | 0 | 0 |
| IRS990ScheduleA/Form990SchAType1SuprtOrgGrp/PowerAppointMajorityDirTrstInd | 0 | 1 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | THE ORGANIZATION BEING SUPPORTED SATISFIES THE PUBLIC SUPPORT TEST. IN ADDITION, THE TWO ORGANIZATIONS SHARE THE SAME OFFICE, SHARE THE SAME STAFF, HAVE THE SAME BOARD, HAVE COMPLEMENTARY PROGRAMS AND ARE INCLUDED TOGETHER ON CONSOLIDATED FINANCIAL STATEMENTS. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 1 | THE ORGANIZATION BEING SUPPORTED SATISFIES THE PUBLIC SUPPORT TEST. IN ADDITION, THE TWO ORGANIZATIONS SHARE THE SAME OFFICE, SHARE THE SAME STAFF, HAVE THE SAME BOARD, HAVE COMPLEMENTARY PROGRAMS AND ARE INCLUDED TOGETHER ON CONSOLIDATED FINANCIAL STATEMENTS. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 2 | THE ORGANIZATION ENSURED THAT ALL SUPPORT WAS USED EXCLUSIVELY FOR SECTION 170 PURPOSES AS THE ORGANIZATIONS SHARE THE SAME OFFICE AND SAME STAFF. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | PART IV, SECTION A, LINE 2: |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 1 | PART IV, SECTION A, LINE 3B: |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 2 | PART IV, SECTION A, LINE 3C: |
| IRS990ScheduleA/OtherSupportSumAmt | 0 | 0 |
| IRS990ScheduleA/SupportedOrganizationsCnt | 0 | 1 |
| IRS990ScheduleA/SupportedOrganizationsTotalCnt | 0 | 1 |
| IRS990ScheduleA/SupportedOrgInformationGrp/EIN | 0 | 222701978 |
| IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd | 0 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeCd | 0 | 10 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt | 0 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt | 0 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt | 0 | US SIF THE FORUM FOR SUSTAINABLE AND RESPONSIBLE INVESTMENT |
| IRS990ScheduleA/SupportingOrganization509a3Ind | 0 | X |
| IRS990ScheduleA/SupportingOrgType1Ind | 0 | X |
| IRS990ScheduleA/SupportSumAmt | 0 | 0 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 105405 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 17001 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 122406 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 111286 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | DUE TO US SIF |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | US SIF IS EXEMPT FROM FEDERAL AND LOCAL INCOME TAXES UNDER SECTION 501(C)(6) OF THE INTERNAL REVENUE CODE ON INCOME DERIVED FROM ACTIVITIES RELATED TO THEIR EXEMPT PURPOSE. THE FOUNDATION IS EXEMPT FROM FEDERAL AND LOCAL INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE ON INCOME DERIVED FROM ACTIVITIES RELATED TO THEIR EXEMPT PURPOSE. US SIF AND THE FOUNDATION ARE NOT PRIVATE FOUNDATIONS FOR TAX PURPOSES. THE ORGANIZATION IS NOT AWARE OF ANY ACTIVITIES THAT WOULD JEOPARDIZE THEIR TAX-EXEMPT STATUS THAT WOULD REQUIRE RECOGNITION IN THE ACCOMPANYING CONSOLIDATED FINANCIAL STATEMENTS. GENERALLY, TAX RETURNS ARE SUBJECT TO EXAMINATION BY TAXING AUTHORITIES FOR UP TO THREE YEARS FROM THE DATE A COMPLETED RETURN IS FILED. IF MATERIAL OMISSIONS OF INCOME EXIST, TAX RETURNS MAY BE SUBJECT TO EXAMINATION FOR UP TO SIX YEARS. AS OF DECEMBER 31, 2024, THE ORGANIZATION HAD NO UNCERTAIN TAX POSITIONS WHICH SHOULD BE RECOGNIZED AS A LIABILITY. THE ORGANIZATION IS NO LONGER SUBJECT TO U.S. FEDERAL OR STATE EXAMINATIONS BY TAX AUTHORITIES FOR TAX YEARS PRIOR TO 2021. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART X, LINE 2: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 105405 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 111286 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/EmployeeCnt | 0 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/EmployeeCnt | 1 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/OfficesCnt | 0 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/OfficesCnt | 1 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTotalExpendituresAmt | 0 | 38857 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTotalExpendituresAmt | 1 | 104160 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTxt | 0 | EUROPE (INCLUDING ICELAND & GREENLAND) |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTxt | 1 | EUROPE (INCLUDING ICELAND & GREENLAND) |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/SpecificServicesProvidedTxt | 0 | CONTRACTOR WILL JOINTLY ADVANCE THE "TRENDS REPORT" BY USING CONTRACTORS' PRE-EXISTING FINANCIAL DATA SCIENCE CAPABILITIES. |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/SpecificServicesProvidedTxt | 1 | DESIGN AND DVELOPMENT OF A NEW WEBSITE |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/TypeOfActivitiesConductedTxt | 0 | COMPENSATION FOR THE SERVICE |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/TypeOfActivitiesConductedTxt | 1 | COMPENSATION FOR THE SERVICE |
| IRS990ScheduleF/BoycottCountriesInd | 0 | 0 |
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