The International Chamber of Commerce’s (ICC) 2026 Arbitration Rules entered into force on 1 June 2026. Regarded as one of the most extensive revisions of the past decade, the new Rules aim to speed up arbitration proceedings, increase procedural flexibility, and rework several issues that practice had long debated.
The revision arrives at a particular moment for the ICC. The institution registered its 30,000th case at the end of 2025 and reached the highest pending caseload in its history. This growing volume has turned procedural efficiency from a preference into an institutional necessity.
We previously announced the entry into force of the Rules; in this article we examine the revision in depth, analysing what each change means in practice and how it will be reflected in contract drafting.
Why This Revision?
Part of the answer lies with users. Users of international arbitration consistently point to two issues among their grievances about the field: cost and duration. Parties to commercial disputes complain that the mechanism they chose as an alternative to litigation has, over time, taken on a weight resembling litigation itself. The expectation of speed that digitalisation has created in daily business life further shortens this patience.
The other part of the answer lies in institutional competition. In recent years, arbitral institutions have been competing not only on neutrality or expertise, but on procedural efficiency as well. The Singapore International Arbitration Centre (SIAC) introduced, in its 2025 Rules, a Streamlined Procedure targeting an award from a sole arbitrator in roughly three months; the Madrid International Arbitration Centre added expedited and highly expedited procedures to its rules. Procedural efficiency has become a distinct competitive arena among the major institutions. The ICC’s 2026 move is read as an expression of its will to keep its leadership in this landscape.
The End of an Era: Terms of Reference No Longer Mandatory
The revision’s most symbolic step is removing the Terms of Reference as a mandatory requirement. This document, whose roots trace back to the first Rules of 1922 and which has been known by this name since the 1955 revision, was one of the features that most distinguished ICC arbitration from other institutions. Under the new regime, the parties or the tribunal may still choose to prepare the document if they find it useful; but it is no longer the default step.
The practical consequence is significant: as the early procedural burden decreases, the first Case Management Conference (CMC) becomes the process’s main milestone. Under the new Rules, no new claim may be raised after the CMC without the tribunal’s express permission; the window for defining the scope of the dispute closes much earlier than before. The Request for Arbitration and the Answer will need to be prepared with considerably more care from now on.
The Expedited Procedure Widens: The Threshold Rises to USD 4 Million
The automatic threshold for application of the Expedited Procedure has been raised from USD 3 million to USD 4 million. According to the ICC’s own data, in more than 40 percent of the cases filed in 2025 alone the amount in dispute did not exceed USD 4 million; the change brings a significant share of mid-sized commercial disputes within the scope of the fast, sole-arbitrator procedure targeting an award within six months.
A critical nuance: the new threshold applies only to arbitration agreements concluded on or after 1 June 2026. For agreements concluded between 2021 and 2026 the earlier USD 3 million threshold continues to apply, and for agreements concluded between 2017 and 2020 the USD 2 million threshold continues to apply. Parties may opt into the procedure regardless of the threshold if they wish, or may expressly opt out of it in their contracts.
A New Gear: A Final Award Within Three Months
The Rules’ most ambitious innovation is the highly expedited procedure introduced under the name Highly Expedited Arbitration Provisions (HEAP). Available entirely on the parties’ joint consent, this mechanism operates with a sole arbitrator, requires the Statement of Claim to be submitted together with the Request for Arbitration, and requires the final award to be rendered within three months of the first Case Management Conference. The arbitrator may decide the dispute on the documents alone, without a hearing and without hearing witnesses; joinder and intervention are not available under this procedure. To the extent the law of the seat allows, the parties may even agree on an award without reasons.
Not tied to any monetary threshold, this procedure was designed for narrow, time-sensitive disputes. How it will strike the balance between speed and procedural safeguards remains to be seen in practice; it is already being debated that awards without reasons could raise questions at the enforcement stage in some jurisdictions.
An Early End for Unfounded Claims
The new Article 30 brings a tool to the Rules that practice had long awaited: an early determination mechanism. A party will be able to request an early decision on claims or defences raised by the other side that are “manifestly without legal merit” or that fall outside the tribunal’s jurisdiction.
The mechanism’s potential impact operates on three levels: cost, duration, and countering bad-faith claims. An unfounded claim occupying the proceedings for months, sometimes years, was one of the most criticised aspects of arbitration; inflated claims raised for tactical purposes could be used as a tool to pressure the other side into settlement. Early determination reverses the cost calculus of that tactic. Setting the threshold at “manifest” lack of merit is a deliberate choice, meant to prevent the mechanism itself from becoming a delay tactic. The ICC Court’s announcement that it will, as a rule, review decisions in the nature of an early determination within one week is, in the institution’s view, a sign of how seriously it takes this tool.
Emergency Arbitration: A Wider Scope and Ex Parte Preliminary Orders
Another notable pillar of the revision is emergency arbitration. The new Rules allow emergency arbitrator proceedings to be initiated not only against signatories to the arbitration agreement and their successors, but also against parties the President of the ICC Court considers, based on the information in the application, may be bound by the arbitration agreement.
More importantly, the Rules explicitly recognise, for the first time, a preliminary order mechanism. A party may request a preliminary order to prevent the other side from frustrating the purpose of the application, for example by dissipating assets or destroying evidence; where circumstances require, this request can be decided without notice to the other party. Once a preliminary order is granted, the other parties must immediately be given the opportunity to present their views, preserving the balance between urgency and the right to be heard.
Award Deadlines Now Tied to the Procedural Calendar
The standard six-month time limit for rendering an award in ordinary arbitration, which had lost its practical meaning, has been removed. Under the new arrangement, the ICC President will set the time limit for the award for each case according to that case’s procedural calendar, and may extend it upon the tribunal’s reasoned request. This replaces the old system of routine extensions with a more predictable model tied to the realities of the case.
Electronic Communication Becomes the Default
Electronic communication is now the default method for written notifications. Requests for Arbitration, Answers, and requests to join will be submitted to the Secretariat electronically; hard copies will be accepted only in the exceptional cases where electronic transmission is not possible.
Confidentiality and Independence: Clearer Obligations
The Rules impose, for the first time, an express duty of confidentiality on arbitrators; as a rule, all matters relating to the arbitration are to be kept confidential. No general duty of confidentiality was imposed on the parties; recognising that absolute confidentiality may not always be appropriate in disputes involving states and public bodies, this matter was left to the parties’ own choice.
There is also an important innovation on the independence front: parties are now required to submit, with reasons, a list of the persons and entities the arbitrators should take into account when assessing conflicts of interest. This fact-finding exercise, carried out until now by the Secretariat, now passes to the parties who actually know the relevant relationships. The obligation to disclose third-party funding remains in place as a separate provision: parties are required to disclose the identity of any funder with an economic interest in the outcome of the arbitration.
An Effect That Returns to the Negotiating Table
The new Rules do not only affect the process after arbitration begins; they also raise the weight of the choices made while a contract is being drafted. As the scope of the Expedited Procedure widens and consent-based options such as HEAP multiply, designing the arbitration clause around the parties’ actual needs, rather than using standard boilerplate, becomes decisive. With the removal of the Terms of Reference, the strategic importance of the first submissions and of the Case Management Conference has increased; the choice of dispute resolution mechanism is increasingly becoming a decision shaped while the contract is being negotiated, rather than one made once the dispute has arisen.
Sources
- ICC, Unveiling the 2026 ICC Arbitration Rules, Part 3, June 2026 – iccwbo.org/news-publications/news/unveiling-the-2026-icc-arbitration-rules-part-3-expedited-procedure-provisions-and-emergency-arbitration/
- Kluwer Arbitration Blog, The 2026 ICC Arbitration Rules: A Practical Guide for Counsel, 8 June 2026 – legalblogs.wolterskluwer.com/arbitration-blog/the-2026-icc-arbitration-rules-a-practical-guide-for-counsel-to-the-most-significant-overhaul-in-a-decade/
- Baker Botts, Beyond the Terms of Reference: Key Changes in the 2026 ICC Rules, June 2026 – bakerbotts.com/thought-leadership/publications/2026/june/beyond-the-terms-of-reference-key-changes-in-the-2026-icc-rules
- Morrison Foerster, 2026 ICC Arbitration Rules Expand Procedural Flexibility, June 2026 – mofo.com/resources/insights/260529-2026-icc-arbitration-rules-expand-procedural-flexibility
- BCLP, ICC Arbitration Rules 2026: What You Need to Know, May 2026 – bclplaw.com/en-US/events-insights-news/icc-arbitration-rules-2026-what-you-need-to-know.html
- Pillsbury, 2026 ICC Arbitration Rules: The Demise of the Terms of Reference, June 2026 – pillsburylaw.com/en/news-and-insights/icc-arbitration-terms-of-reference.html
- ICC, ICC Releases Preliminary 2025 Dispute Resolution Statistics, 2026 – iccwbo.org/news-publications/news/icc-releases-preliminary-2025-dispute-resolution-statistics/
