560 days to T+1: Preparing Luxembourg banks’ for seamless settlement

With approximately 560 days until the EU’s T+1 go-live on 11 October 2027, Luxembourg banks face a tight operational deadline to eliminate manual processes and ensure seamless settlement.

This reform is central to the Savings and Investments Union, reducing risks while positioning Luxembourg’s cross-border hub as a benchmark for efficiency in Europe.

Authors: Thomas Collin and Marilyn Rinck

Timeline and context

• May 2024: North America shifts to T+1
• November 2024: ESMA advises the European Commission to target T+1 by 11 October 2027
• 2025: CSDR amendment confirms the deadline

The EU sees T+1 as a way to strengthen post-trade systems, reduce risks linked to delayed trades, and enhance global competitiveness.

For Luxembourg banks, the transition will streamline funding, client servicing, and operational chains involving allocations, FX, confirmations and safekeeping.

High awareness meets building readiness

Industry awareness is strong, but implementation remains fragmented.

A Value Exchange survey of around 1,000 market participants shows that:

• 77% have reviewed the EU T+1 Industry Committee’s High-Level Roadmap
• Around 30% of recommendations — focused on standardisation, automation and same-day processing — are already implemented

Banks are making progress:

• 38% of custodians and settlement agents
• 32% of investment banks and brokers
• 23% of private banks

have established formal implementation plans, with many targeting completion in 2026.

Key priorities include:

• Automation, cited by two-thirds of respondents
• Managing dependencies on partners, highlighted by 58%

Europe’s transition will be more complex than North America’s, due to multiple currencies, fragmented markets, regulatory diversity and local practices.

This increases the need for harmonisation across the entire settlement chain, from trade matching and clearing to corporate actions.

Luxembourg’s positive momentum

At last week’s InfraFuse Forum (ABBL, LuxCMA, BNP Paribas), participants reviewed progress and key challenges.

The EU T+1 Committee’s Securities Settlement Handbook provides practical guidance on critical processes.

Recommended steps for ABBL members in 2026

ABBL members can use 2026 as a preparation year, with 2027 dedicated to testing and refinement.

Key actions include:

• Review end-to-end trade flows to identify T+1 timing constraints (FX, funding, instructions)
• Enhance automation, including:
  • straight-through processing (STP)
  • APIs for real-time exchange
  • monitoring tools
  • data quality improvements
• Strengthen collaboration with custodians, ICSDs, vendors and asset managers to harmonise practices, especially cross-border
• Leverage existing frameworks, including the High-Level Roadmap and Securities Settlement Handbook, while ensuring senior management engagement