One year to go for T+1 settlement: the regulatory framework is complete, now let’s make it happen

With the amended RTS on settlement discipline and ESMA's revised guidelines on standardised procedures and messaging protocols now finalised, Luxembourg supervisors expect firms to move from planning to demonstrable readiness, including end-to-end testing across trading, clearing, settlement and asset servicing. For compliance and operations teams, the key message is ecosystem-wide assurance: internal systems alone will not satisfy the supervisor where dependencies on custodians, CSDs, brokers, fund administrators, technology vendors and counterparties remain unvalidated. The new settlement discipline requirements, deliberately aligned with market best practice and the 2025 EU T+1 Industry Committee recommendations, will be phased in, meaning firms must map multiple compliance deadlines rather than a single milestone.

Priority actions include a formal gap assessment against the revised RTS and ESMA guidelines, confirmation of messaging and matching capabilities, recalibration of funding and FX processes to a same-day cycle, compression of affirmation and allocation workflows, and documented evidence of testing outcomes. Firms should also refresh CSDR settlement fail procedures, penalties and buy-in arrangements, and extend readiness assurance to third-country counterparties whose cycles may not align. Early movers can convert compliance into competitive advantage through superior fail rates and client service, while late movers face elevated operational, liquidity and reputational risk.