ICSID explained

What ICSID is

Article 1 of the Convention establishes the Centre ¹. Article 2 places its seat at the principal office of the International Bank for Reconstruction and Development ¹. The Convention entered into force on 14 October 1966, and the Executive Directors submitted it to governments on 18 March 1965 ¹.

ICSID describes itself as providing facilities for conciliation and arbitration of international investment disputes ³. Its services include case administration, appointments and challenges, hearing facilities and an administrative registry ³. Member States determine the general directions of ICSID through the Administrative Council ³.

Which disputes ICSID can hear

Under Article 25(1), ICSID jurisdiction covers a legal dispute arising directly out of an investment between a Contracting State and a national of another Contracting State, which the parties consent in writing to submit ¹. Once both parties have consented, neither may withdraw its consent alone ¹.

The Additional Facility covers cases outside the Convention. ICSID states that the 2022 amendments let Additional Facility proceedings go ahead where one or both parties are not ICSID Contracting States, and allow regional economic integration organisations such as the European Union to be parties ⁴.

The rules in force

ICSID Member States approved amended rules on 21 March 2022, and the 2022 Regulations and Rules took effect on 1 July 2022 ⁴. ICSID states the changes include mandatory deadlines for orders and awards, optional expedited arbitration, wider public access to orders and awards and, for the first time, a duty to disclose third-party funding, including the funder's name and address ⁴.

The caseload

Issue 2026-2 of The ICSID Caseload, Statistics covers cases registered or administered as of 30 June 2026 ². ICSID released it on 14 August 2026 ⁶. The release states that ICSID had registered 1,118 cases under the ICSID Convention and Additional Facility Rules, and that it administered 363 cases in FY2026, the most in its history ⁶. It administered 15 cases under non-ICSID rules in FY2026, including 12 under UNCITRAL rules ⁶.

By sector, electric power and other energy account for 17% of all cases, oil and gas 14% and mining 12% ². In FY2026 cases, oil and gas led with 25%, followed by mining with 18% ².

How ICSID cases end

ICSID's release states that of the arbitrations concluded in FY2026, the year to 30 June 2026, 63% were decided by the tribunal and 37% were settled or otherwise discontinued ⁶. Issue 2026-2 gives an all-years split in a chart whose text does not tie each figure to its label, so this page does not repeat it ².

Who sits on tribunals

ICSID counts appointments by region. Across all cases, 45% of appointees came from Western Europe, 20% from North America and 13% from South America ². By nationality, the largest numbers of appointments are of nationals of the United States (369), France (354) and the United Kingdom (308) ². In FY2026, 52 nationalities were appointed and 8% of appointments were of first-time appointees ².

After the award

ICSID states that, unlike other international arbitration awards, ICSID Convention awards cannot be challenged in national courts ⁵. The Convention provides its own post-award remedies, one of which is annulment ⁵. If a State denounces the Convention, the denunciation takes effect six months after the notice is received, and rights and obligations arising from consent given before the notice are preserved ¹.