ICC overhauls arbitration rules to boost efficiency and transparency in line with modern practice

The International Chamber of Commerce’s 2026 rule changes come into effect on 1 June, making a series of codifications and reforms to increase efficiency and flexibility during the arbitration process while also strengthening transparency.

This is the most significant update to the ICC Rules in five years, and comes after 2025 saw the ICC Court of Arbitration deal with its highest-ever pending caseload.

Sylvia Tonova, an expert in international arbitration with Pinsent Masons and member of the ICC Court, explained the update was in line with global trends to revise arbitration court rules to streamline and digitise the process.

“The 2026 ICC Rules will bring the rules into line with current practice and mark a clear focus on efficiency-driven arbitration, notably through the expansion of expedited procedures, the introduction of a new ultra-fast track, the streamlining of early-stage formalities, and enhanced tools for early case disposal and urgent relief,” she said.

A new highly expedited procedures is introduced on an opt-in basis while the threshold to the existing expedited procedure increases to US$4 million. The early procedural phase for cases will be simplified with the removal of the existing, mandatory, terms of reference requirements, and communications will move to being digital as a default.

Among other efficiency-driven changes are the introduction of an ‘ex parte’ preliminary order for emergency arbitrators; the codification of a preliminary determination mechanism allowing unmeritorious claims to be dismissed at an early stage; and greater flexibility in the timing of awards with the six-month deadline removed to avoid inefficient repeated extensions.

To meet user demand for transparency, stronger disclosure frameworks are introduced, including party lists assisting arbitrators in complying with their disclosure obligations, alongside dedicated provisions to the role of tribunal secretary.

Pamela McDonald, international arbitration expert at Pinsent Masons, said the reforms reflect growing user demand for greater efficiency and transparency, and form part of a broader trend across leading arbitral institutions, including recent rule revisions in Singapore (2025) and Hong Kong (2024).

“The changes come on the back of one of the busiest years for the ICC in its history, with 894 new cases registered amid 1,896 ongoing matters, with the ICC arbitration rules remaining top of the globally preferred set of rules for dispute resolution based on the latest Queen Mary survey (46-page / 209KB PDF),” she added.

ICC president Claudia Salomon said the rule changes would help ensure every aspect of ICC arbitration had a client mindset in dealing with cases.

“The 2026 Rules are designed within this broad framework, focused on increased efficiency, clarity and usability to meet the evolving needs and expectations of the parties,” she said.

“Building on more than 100 years as the world’s most preferred and trusted arbitral institution, the 2026 Rules offer state-of-the-art tools for the resolution of disputes, large or small, across all industry sectors, and involving businesses, states and state entities from around the world.”