IAHS is a UK registered charity; all revenues are used to support the aims of the Association.
IAHS works closely with IUGG, International Council for Science (ICSU), UNESCO, World Meteorological Organization (WMO), International Atomic Energy Agency (IAEA) and WWC, and often collaborates with organizations such as International Association of Hydrologists (IAH), International Association of Hydraulic Engineering and Research (IAHR) and Inland Waterways Association (IWA).