The European Securities and Markets Authority has published a statement setting out key deadlines and action points for the European Union's transition to a T+1 settlement cycle in financial markets.

ESMA's latest statement follows the publication last year of its final settlement discipline rules supporting the EU's move to T+1. The package introduced same-day allocations, machine-readable confirmations and updated reference-data requirements, with the first pre-settlement measures scheduled to take effect from December 2026 ahead of the October 2027 migration.

ESMA Sets First T+1 Readiness Deadline

The regulator said the transition remains scheduled for 11 October 2027. It added that 2026 is a critical year for market participants to complete their preparations.

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According to the statement, the first regulatory deadline will be 7 December 2026, covering allocations and confirmations processes. ESMA described this as a key milestone in the preparation timeline.

The regulator also called on market participants to prepare and test their own readiness before the transition date. It further urged firms to assess the readiness of their broader ecosystem across the trading and settlement chain.

Europe’s move to T+1 will not mirror the US playbook. Greater fragmentation and complexity means firms will face a distinct set of operational challenges, making preparation crucial. Watch our new insights video to learn more: https://t.co/GlXmO2Thxs pic.twitter.com/Oqp0Rb8kIv

— State Street (@StateStreet) July 17, 2026

CySEC Prepared Firms for T+1 Transition

Separately, broader legislative work on the EU's move to T+1 continued last year. The European Commission proposed legislation to shorten the securities settlement cycle from T+2 to T+1 following ESMA's final report. The proposal included amendments to the Central Securities Depositories Regulation.

In response, the Cyprus Securities and Exchange Commission issued guidance to investment firms, alternative investment fund managers, trading venues and central securities depositories. CySEC also said a governance structure would be established, including a T+1 coordination committee, an industry committee and dedicated workstreams to develop the processes and standards needed for the shift.