T+1 settlement transition in the European Union, Digi Mart USA News: One year before the effective move to a one-day settlement cycle (T+1) in the European Union, the Autorité des marchés financiers (AMF) and the Banque de France remind all financial market participants of the importance of their operational preparations, the implementation of new settlement discipline requirements and their active involvement in the upcoming testing phases.
Under the revised CSDR regulation (EU) No 909/2014, from October 11, 2027, the settlement cycle for transactions must move from no later than the second business day after trade execution (T+2) to T+1. This major change requires a redesign of systems and operational processes across the entire trading and settlement chain.
All affected financial players must analyze the impact of this transition on their activities and take the necessary measures to be ready for T+1 on October 11, 2027. Market participants are encouraged to regularly consult and rely on the work of the EU T+1 Industry Committee.
As recalled by the European Securities and Markets Authority (ESMA) in its statement of July 20, 2026, the legal and regulatory framework for the transition to T+1 has been known since mid-October 2025. In addition to amending Article 7 of CSDR, changes were made to Commission Delegated Regulation (EU) 2018/1229 to define new settlement discipline requirements particularly useful for the transition to T+1.
These amendments were formally adopted on October 14, 2026.
Two deadlines should be noted for implementing the new requirements. Guidelines on allocations and confirmations were also published on October 19, 2026.
Finally, whether under T+2 or T+1, the AMF and the Banque de France remind firms that failure to meet the maximum settlement deadline triggers penalties under Article 7 of CSDR and its delegated regulations.
The EU T+1 Industry Committee published a testing plan in March 2026, updated in September, intended for all parties affected by the move to T+1.
This testing plan provides for several testing windows running from February to October 2027. They are designed to allow market participants to test, progressively and on a voluntary basis, their processing chains, particularly trade allocation and confirmation, settlement instructions and exchanges with market infrastructures.
The AMF and the Banque de France strongly encourage all parties concerned by T+1 to take an active part in one or more of these testing phases. This includes coordinating with their clients or direct service providers also involved in the transition to T+1 to determine which actions are needed and which test environments are accessible to them.
Finally, the AMF and the Banque de France reaffirm their commitment to continue exchanges across the Paris financial center throughout this decisive year. Through the working group they co-chair, this work has improved the flow of information supporting the technical discussions under way in the market.
One year before the effective move to T+1 in Europe, the contributions of each financial firm, with the support of professional associations, are essential to ensure the collective success of the transition in October 2027.
