Citi and Siam Commercial Bank Launch 24/7 Near-Real-Time USD Payments

Citi and SCB bring 24/7 USD clearing to a partner bank

Siam Commercial Bank, or SCB, has become the first financial institution client to go live with Citi’s integrated 24/7 USD Clearing and Citi Token Services solution.

The service allows eligible corporate and institutional clients to initiate and receive US dollar payments beyond conventional banking hours, including weekends and public holidays. Citi describes the transactions as near real time, reflecting the time required to complete the payment through connected institutions and compliance processes.

Reuters separately reported that Citi had completed its first instant international US dollar payment with a partner bank through the collaboration with SCB. The independent report confirms that the development extends Citi’s round-the-clock payment capabilities beyond transfers between accounts held solely within Citi.

How the integrated payment model works

Citi Token Services uses a private permissioned blockchain to represent commercial bank deposits held within Citi’s regulated banking network.

The tokenised balance remains connected to a regulated bank deposit. It should therefore be distinguished from a publicly traded stablecoin issued outside the conventional banking system.

When Citi Token Services is combined with 24/7 USD Clearing, the infrastructure can coordinate the movement of funds outside traditional cut-off times. The permissioned design allows Citi and participating institutions to retain their existing compliance, risk-management and account-control processes.

Citi says its 24/7 clearing solution connects more than 300 financial institutions across over 50 markets. The model is designed to bridge Citi and non-Citi accounts, allowing partner banks to extend round-the-clock payment capabilities to their own corporate and institutional customers.

The first transaction moved funds from London to Thailand

The first completed transaction involved Phillip Securities Thailand, a subsidiary of PhillipCapital and a client of SCB.

US dollars were transferred from a Citi account in London maintained by another PhillipCapital subsidiary to the beneficiary account at SCB in Thailand. The payment was completed during a US holiday weekend, demonstrating how the integrated system can operate when conventional dollar-clearing windows may be limited.

The transaction provides a practical example of how tokenised deposits can connect with existing bank accounts and clearing infrastructure across institutions and jurisdictions.

Why banking cut-off times matter

International businesses frequently operate across time zones, weekends and public holidays even when their banking infrastructure follows fixed processing windows.

A payment initiated late on Friday may encounter a weekend, a public holiday or a different operating schedule in the destination market. These timing differences can affect supplier payments, treasury positions, liquidity planning and access to working capital.

Round-the-clock clearing can reduce part of this timing gap. It may be particularly useful for businesses that manage payment obligations across several markets or need to respond to funding requirements outside normal banking hours.

However, near-real-time capability does not mean every cross-border payment will settle instantly. Actual availability and processing time still depend on the participating institutions, currency corridor, compliance checks, beneficiary arrangements and connected settlement systems.

What the launch means for cross-border payment infrastructure

The launch demonstrates how banks are combining tokenised deposits with existing clearing networks instead of moving customers entirely onto public blockchain infrastructure.

For financial institutions, the model may provide a way to extend service hours while retaining established account, compliance and settlement controls.

For payment providers and internationally active businesses, round-the-clock wholesale infrastructure could support more predictable downstream payment services over time. Local availability, regulatory alignment and interoperability between banks and payment providers will determine how quickly those benefits reach individual merchants and end users.

The SCB launch remains an early institutional implementation. Broader market impact will depend on how many partner banks, currencies and corridors become connected to the service.