From October 2027, securities transactions must be finalized on the trading day plus one day. A seemingly minor adjustment to the timeline, but one that will have the operational and technological impact of a major project.
Lessons from the USA, complexity in Europe
In the US, T+1 has reduced counterparty and liquidity risks, made capital available more quickly, and increased market efficiency. Europe is now following suit, albeit under significantly more complex conditions. Different time zones, currencies, market infrastructures, and market practices make implementation more challenging than in North America.
Essentially, T+1 means that what is currently often processed overnight or the following day must be completed on the trading day itself. Trade enrichment, order confirmation, allocation, delivery instructions, and matching are becoming more closely integrated. The timeframe for manual intervention shrinks drastically. Errors lead more quickly to settlement failures, with direct cost and reputational consequences.
Data quality and process architecture as a foundation
Those who want to successfully implement T+1 must start with data quality. A "golden source" for master data and settlement instructions, automated validations during order entry, and AI-supported plausibility checks are prerequisites, not optional extras. These must be complemented by standardized, digital confirmation and allocation processes with ideally same-day matching.
Equally important is the process and system architecture. Overnight batch processing is reaching its limits. Real-time or near-real-time processing, modern interfaces, and end-to-end transparency via dashboards are required. Institutions need an up-to-date view of open trades, matching status, balances, and liquidity, complemented by clear escalation procedures.
Cross-border business as a stress test
Cross-border operations are particularly challenging. Differing cut-off times for corporate social workers (CSDs) and custodians, differing holiday calendars, and fragmented corporate action rules can only be managed with centralized control and clear runbooks. Many institutions will need to adapt their operating model, incorporating late and early shifts or a follow-the-sun approach.
T+1 is a transformation program
T+1 is not an isolated IT project. It requires C-level sponsorship, robust governance, defined milestones, and clear KPIs such as STP rate, same-day matched trade rate, settlement failures, and liquidity buffers. A thorough impact analysis across the entire post-trade lifecycle is the first step, followed by defining the target operating model, adjusting SLAs and contracts, and conducting end-to-end testing, including cutover and rollback scenarios.
From mandatory program to competitive advantage
The real opportunity lies in understanding T+1 as a catalyst. Those who digitize post-trade processes now, eliminate media breaks, and harmonize data flows will not only meet the new deadlines but also reduce structural costs, mitigate risks, and improve service quality. In an environment of margin pressure and increasing regulatory requirements, a resilient settlement organization can become a decisive competitive advantage.
Those who start early and manage the transformation strategically turn it into an efficiency gain. Those who wait will experience T+1 primarily as a cost and risk driver.
Critical use cases
We see three key areas that every institution should examine when implementing T+1. First, incomplete or incorrect counterparty data and delivery instructions: even small gaps in the data are enough to cause transactions to be stuck. Second, failed matching due to discrepancies in transaction details or asynchronous data storage, especially when third-party providers are involved. Third, inadequate delivery planning for securities, liquidity, and foreign exchange because holdings are not checked and reserved in real time.