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T+1 settlement: the operating deadline starts before October 2027

T+1 settlement: the operating deadline starts before October 2027

Settling one business day after trade date compresses the whole trade lifecycle, not just the settlement step. Trade capture, allocations, confirmations, funding and exception handling all move earlier, and the overnight buffer firms currently use to fix problems largely disappears.

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At a glance

11 Oct 2027

UK, EU and Switzerland target date for the move to T+1 settlement

Source: HM Treasury · European Commission · SIX

~20%

Share of today's effective processing window left for the same post-trade tasks under T+1

Source: EU-UK-CH T+1 Testing Plan (2026)

~95%

Same-day affirmation in the US after the May 2024 move to T+1

Source: SIFMA/ICI/DTCC T+1 After Action Report (2024)

Summary

T+1 means securities trades are expected to settle one business day after trade date, leaving less time to correct poor data, late allocations, unmatched instructions, funding gaps, stock shortages and operational exceptions.

The UK, EU and Switzerland are now aligned around 11 October 2027. Scope and implementation detail differ by market, but the direction is clear: firms need to assess impact, redesign weak operating models, automate fragile hand-offs, test across the market chain and evidence readiness.

For globally active firms, the challenge is not only compliance with a new date. It is making the post-trade operating model fast, controlled and resilient enough to operate in a compressed settlement cycle.

This paper sets out what needs to change across trade capture, allocations, confirmations, settlement instructions, funding, stock lending, exceptions, static data, reconciliation, corporate actions, technology and controls before the UK, EU and Switzerland move to T+1 on 11 October 2027.

What this paper covers

  • What T+1 changes across the trade lifecycle and operating day.
  • Confirmed UK, EU and Switzerland dates, scope and caveats.
  • Why T+1 compresses the full trade lifecycle.
  • Lessons from the US, Canada and Mexico move to T+1.
  • Where T+1 breaks first in post-trade operations.
  • Operating model, technology, data and automation impacts.
  • Implications for banks, brokers, asset managers, wealth platforms, custodians, pension funds and service providers.
  • A practical readiness model for 2026 and 2027.
  • How Capmark helps clients assess, redesign, automate, test and deliver T+1 readiness.

Who should read this

This paper is for COOs and Heads of Operations; CIOs and technology leaders; Heads of Settlements and Middle Office; custody, asset servicing and clearing leaders; asset managers and investment operations leaders; broker-dealers and market intermediaries; wealth platforms and administrators; superannuation, pension and asset-owner operations teams; outsourced service providers; and transformation, PMO and regulatory change leaders.

Capmark perspective

Capmark's view is that T+1 should be treated as a post-trade operating model programme, not a settlement-team workstream.

The firms that are ready will not be those that simply ask operations teams to work faster. They will be those that fix the upstream causes of settlement risk: incomplete trade capture, late allocations, poor standing settlement instructions, fragmented hand-offs, overnight batch processing, weak exception workflow, unclear cut-offs, ageing platforms and untested vendor dependencies.

Capmark helps institutions assess their T+1 exposure, redesign the operating model, remediate data and SSI issues, automate post-trade workflows, deliver vendor and platform changes, plan testing and dress rehearsals, govern migration and transition into BAU.