The United Kingdom, European Union, and Switzerland will transition stock settlement cycles from T+2 to T+1 on October 11, 2025, according to London Stock Exchange Group (LSEG) officials. Hong Kong plans a similar shift in Q4 2025. The moves respond to competitive pressure following the United States' T+1 implementation in 2024 and major exchanges' announcements of 24-hour trading launches in the second half of this year. By late 2025, T+1 settlement will cover approximately 90% of global stock market capitalization, creating operational urgency for markets still operating under T+2 frameworks.
UK and EU Confirm October 11, 2025 T+1 Launch with Phased Automation Rollout
LSEG confirmed the October 11, 2025 T+1 transition remains on schedule. An LSEG representative stated the exchange is already collecting feedback on 24-hour trading from overseas brokers including those in South Korea. Andrew Douglas, chair of the UK Settlement Acceleration Task Force, said 90% of participating firms confirmed they will finalize T+1 work scope and secure budgets by year-end according to a recent survey. The UK established a detailed implementation plan in February 2025, allocating approximately 2 years and 8 months for regulatory updates, financial institution system reviews, and post-trade automation before the October launch. Chris Elms, CEO of Euroclear UK & International, noted that firms with automated post-trade workflows during the US T+1 transition experienced faster benefits, while those relying on manual processes faced higher costs and operational difficulties. He emphasized the UK will leverage this experience to prioritize automation, data quality, and operational readiness.
Hong Kong Targets Q4 2025 T+1 Implementation Alongside Trading-Hour Extension Review
Hong Kong Exchange (HKEX) is advancing T+1 adoption for Q4 2025. Yu Tae-seok, executive director of HKEX's International Markets division, explained that maintaining T+2 in Asia while other regions operate under T+1 forces investors to secure additional capital for portfolio management, increasing costs and reducing efficiency. HKEX will complete T+1 settlement infrastructure and share digitization work this year before evaluating trading-hour extensions. Yu noted that South Korea's market closes at 3:30 PM local time while Hong Kong closes at 5:00 PM Korea time, and the 1.5-hour gap significantly affects ETF traders, arbitrageurs, and market makers. Aligning trading hours would improve cross-market transaction efficiency.
South Korea Announces T+1 for October 2025 but Delays Pre-Market Opening to Year-End
South Korea announced plans to introduce T+1 in October 2025 but has not published a detailed roadmap. Korea Exchange postponed its 7:00 AM pre-market opening from September to year-end. Ki Min-seok, head of Korea Investment & Securities' London branch, said European institutional investors express regret over missing Korea's recent market surge during one-on-one meetings. However, institutions prioritizing long-term investment focus on fundamental corporate growth and value-enhancement efforts rather than chasing short-term rallies.
FAQ
What is T+1 settlement and why are markets adopting it?
T+1 settlement means stock transactions are finalized one business day after the trade date, down from the current T+2 (two business days). Markets are adopting T+1 to improve capital efficiency, reduce counterparty risk, and remain competitive as the United States implemented T+1 in 2024 and major exchanges plan 24-hour trading.
When will the UK, EU, and Switzerland launch T+1 settlement?
The UK, EU, and Switzerland will transition to T+1 settlement on October 11, 2025. The UK established a phased implementation plan in February 2025, giving firms approximately 2 years and 8 months to prepare through regulatory updates, system reviews, and post-trade automation.
What is South Korea's timeline for T+1 adoption?
South Korea announced plans to introduce T+1 in October 2025 but has not released a detailed implementation roadmap. Korea Exchange also postponed its 7:00 AM pre-market opening from September to year-end.
