LRI is currently funded by the Climate and Development Knowledge Network (CDKN).

LRI also receives in-kind support from barrister chambers, universities and several leading law firms, including: Allen & Overy, Ashurst, Baker & McKenzie, Berwin Leighton Paisner (BLP), Bircham Dyson Bell, BNB Advocates, Clayton Utz, Debevoise & Plimpton, Eversheds, Herbert Smith Freehills, Hogan Lovells, Kirwin Becker Law Group, Linklaters, Norton Rose Fulbright, Olswang, Schoenherr, Sheppard Mullin Richter & Hampton, Simmons & Simmons, Slaughter and May, Stephenson Harwood, Stewart McKelvey, Stibbe, Temple Bright, Weil Gotshal & Manges, and White & Case.

LRI also has a funding agreement to update and review the United Nations Environment Programme’s (UNEP) training manual and glossary of legal terms on international environmental law and to build a web-based climate legislation advice portal (CLAP). It has previously been commissioned by the German development agency Gesellschaft für Internationale Zusammenarbeit (GIZ) and other clients to provide support to developing countries in connection with the international climate negotiations, domestic implementation and capacity building.