The Green Climate Fund (GCF): how it works and how to access it
123 matching capital sources on the ASFIP database · Last checked October 2026
The Green Climate Fund (GCF) is the largest dedicated multilateral climate fund in the world. It was set up under the UN climate convention (UNFCCC) to finance mitigation and adaptation in developing countries, and it funds through grants, concessional loans, equity and guarantees.
The most important thing to know: you cannot apply to the GCF directly as a company or project developer. Every funding proposal goes through an accredited entity — a development bank, UN agency, national institution or commercial bank approved by the GCF — and needs a no-objection letter from the country's National Designated Authority (NDA).
This guide explains how GCF money actually reaches projects, which routes suit which project sizes, and lists the GCF windows and partner institutions on our database.
Find the right route for your project
Ask iSustain Advisor Live about GCF funding for your country, sector and project stage. Your free result includes a project summary, match count and three named sample organisations.
Who can get GCF funding?
GCF finances public and private projects in developing countries that are parties to the UNFCCC. Applicants are accredited entities; the beneficiaries can be governments, utilities, banks, companies and communities.
If you are a project developer or SME, your realistic route is to partner with an accredited entity that already works in your country and sector, or to reach GCF capital indirectly through a fund, credit line or facility the GCF has already financed.
How the GCF funding process works
1. Concept note — the accredited entity submits a short concept, optionally for GCF feedback. 2. No-objection letter — the NDA confirms the project fits national priorities. 3. Funding proposal — full proposal with feasibility, climate rationale, gender and safeguards assessments. 4. Secretariat and independent technical review. 5. Board approval, then legal agreements and disbursement.
Full proposals typically take 12–24 months from concept to board approval. The Simplified Approval Process (SAP) is a faster track for smaller, low-risk projects, and the Project Preparation Facility funds feasibility work before a full proposal.
GCF funding windows
Public sector proposals through accredited entities; the Private Sector Facility (PSF) for private investment, often through funds and banks; the Readiness Programme for country capacity and pipeline grants; and the Project Preparation Facility for feasibility. Regional programmes, such as those for small island states, group projects across countries.
Common reasons GCF proposals fail
Weak climate rationale (the project would happen anyway, or the climate impact isn't quantified), no clear paradigm-shift story, missing co-finance, insufficient gender and safeguards work, and choosing an accredited entity whose size category or sector does not match the project.
The funders
Each profile shows mandate, instruments and sector appetite. Verified contacts and application routes are available to members.
- Green Climate FundClimate Fund · South KoreaLargest dedicated global climate fund supporting mitigation and adaptation in developing countries.GrantsConcessional DebtEquity
- Green Climate Fund Readiness ProgrammeClimate Fund · South KoreaGrantsTechnical Assistance
- Green Climate Fund - Private Sector FacilityProgramme Window · South KoreaDedicated GCF window deploying concessional debt, equity and guarantees to crowd private capital into climate projects, including across Africa.Concessional DebtEquityGuarantees
- Green Climate Fund Pacific Regional ProgrammesProgramme Window · South KoreaGCF's dedicated support to Pacific small island developing states, delivered through regional accredited entities such as SPREP, SPC and the Pacific Community, prioritising adaptation and resilience.GrantsConcessional DebtTechnical Assistance
- African Development BankMDB · Côte d'IvoireAfrica's premier multilateral development bank, financing infrastructure, energy and climate adaptation across the continent.DebtGuaranteesGrants
- International Finance CorporationMDB · United StatesPrivate-sector arm of the World Bank Group, investing in climate-smart businesses and infrastructure in Africa.DebtEquityMezzanine
- Africa Finance CorporationMDB · NigeriaPan-African multilateral development finance institution focused on infrastructure.DebtEquityMezzanine
- European Investment BankMDB · LuxembourgEU lending arm financing large-scale climate and infrastructure projects in Africa.DebtConcessional DebtGuarantees
- African Export-Import BankMDB · EgyptPan-African trade finance institution supporting intra-African trade and industrialisation.Trade FinanceDebtGuarantees
- Climate Investment FundsClimate Fund · United StatesMulti-donor concessional climate finance vehicle deployed through MDBs.Concessional DebtGrantsGuarantees
- Global Environment FacilityClimate Fund · United StatesMultilateral fund financing biodiversity, land degradation and climate mitigation projects.GrantsConcessional DebtTechnical Assistance
- Trade and Development BankMDB · MauritiusRegional development bank serving Eastern and Southern Africa.Trade FinanceDebtGuarantees
- Asian Development BankMDB · PhilippinesThe principal multilateral development bank for Asia and the Pacific, financing climate mitigation and adaptation through sovereign lending, private sector operations, guarantees and technical assistance. ADB has committed to $100bn of cumulative climate finance to 2030 and hosts the Energy Transition Mechanism.DebtConcessional DebtEquity
Showing 13 of 123 matching capital sources. The remaining 110 — including their verified routes and eligibility criteria — are reserved for members.
Common questions
- Can a private company apply to the Green Climate Fund directly?
- No. Proposals are submitted by GCF accredited entities. A company works with an accredited entity, or accesses GCF capital through a fund, bank credit line or facility the GCF has already financed.
- What is a National Designated Authority (NDA)?
- The NDA is the government body that acts as each country's link to the GCF. It issues the no-objection letter every funding proposal needs and manages Readiness Programme support.
- How long does GCF funding take?
- A full proposal commonly takes 12 to 24 months from concept note to board approval. The Simplified Approval Process is faster for smaller, lower-risk projects.
- What does the GCF fund?
- Mitigation and adaptation in developing countries — energy, transport, buildings, forests and land use, agriculture, water, health and resilient infrastructure — through grants, concessional loans, equity and guarantees.
- Is GCF funding a grant?
- Sometimes. The GCF uses grants mainly for adaptation, readiness and preparation, and concessional loans, equity and guarantees for revenue-generating projects.
Related guides
Official sources: Green Climate Fund · GCF accredited entities · GCF Readiness Programme. Reviewed by the iSustain Global research team against funders' published criteria.