Saudi Arabia Withdraws From mBridge CBDC Platform Casts Uncertainty Over China-Led Payment System

The global financial architecture is undergoing a quiet yet seismic restructuring, and the fault lines have just widened significantly in the Middle East. The Saudi Central Bank (SAMA) has officially withdrawn from mBridge, a high-profile, China-led cross-border payment platform powered by wholesale central bank digital currencies (CBDCs). This departure marks a pivotal moment for the multi-lateral initiative, which aims to bypass traditional, Western-dominated correspondent banking networks. SAMA’s exit strips the project of one of its most economically influential participants, coming on the heels of the Bank for International Settlements (BIS) stepping back from direct operational involvement. As mBridge transitions from an experimental international initiative into an independently governed Hong Kong-based entity, the withdrawal of Saudi Arabia injects a fresh wave of geopolitical and regulatory anxiety into the future of alternative global payment rails.

The news of SAMA’s departure, initially brought to light in late September 2026, culminates a multi-year trajectory that saw Riyadh enthusiastically engage with the platform before quietly backing away. While the central bank characterized its participation as exploratory rather than operational, the timing and strategic implications of the move resonate far beyond technical software testing. With the foundational backing of the BIS now a matter of history and Riyadh pivoting away from the consortium, mBridge faces an uphill battle to establish global legitimacy, navigate complex compliance frameworks, and alleviate Western fears regarding the circumvention of international sanctions.

Genesis of mBridge: Reengineering Global Settlement

To understand the weight of Saudi Arabia’s withdrawal, one must examine the ambitious origins of the mBridge project. Launched in 2021 as a collaborative research undertaking by the BIS Innovation Hub in conjunction with the central banks of China, Hong Kong, Thailand, and the United Arab Emirates, mBridge was designed to solve the structural inefficiencies plaguing traditional cross-border payments. For decades, international wholesale settlements have relied on slow, expensive, and heavily intermediated correspondent banking webs—predominantly denominated in United States dollars and routed through legacy messaging networks like SWIFT. These traditional pathways can take anywhere from several hours to multiple business days to settle, while incurring steep administrative and foreign exchange fees.

Project mBridge sought to upend this status quo by utilizing a custom-built distributed ledger technology (DLT) infrastructure, known as the mBridge Ledger. This shared blockchain platform allows participating central banks to issue, hold, and transfer their respective wholesale central bank digital currencies directly among one another. By removing commercial banking intermediaries from the settlement chain, the platform theoretically reduces settlement times from days down to mere seconds, while simultaneously slashing transaction costs and mitigating credit and liquidity risks.

The promise of instantaneous, multi-currency, peer-to-peer wholesale transactions caught the attention of monetary authorities worldwide. As geopolitical tensions escalated and weaponized financial sanctions became a prominent tool of Western foreign policy, alternative settlement systems gained substantial appeal among emerging economies and nations seeking strategic autonomy in their foreign reserves and trade settlements.

A Chronological Timeline of Expansion and Retrenchment

The evolution of mBridge has been marked by rapid technological milestones followed by strategic structural realignments. Tracing the chronology of the platform reveals how quickly the institutional landscape surrounding the project has shifted:

• 2021: The BIS Innovation Hub, alongside the central banks of China, Hong Kong, Thailand, and the UAE, officially launches Project mBridge to research and develop a multi-CBDC platform for wholesale cross-border payments.
• 2023: The Saudi Central Bank (SAMA) joins the initiative as an observing member, signaling Riyadh’s growing interest in exploring advanced financial technology and diversifying its international financial partnerships.
• June 2024: SAMA upgrades its status, officially transitioning from an observing member to a full participant in the mBridge project, aligning itself closely with the founding central banks.
• October 2024: The Bank for International Settlements formally exits its active, hands-on role in mBridge. The BIS frames its departure as a natural consequence of the project graduating from an experimental research phase to a mature operational stage, arguing that the remaining member central banks are fully capable of steering the initiative independently.
• May 13, 2025: SAMA successfully completes its minimum viable product (MVP) proof of concept on the mBridge platform, demonstrating the technical feasibility of integrating the Saudi riyal into the DLT-based settlement infrastructure.
• Late 2025: Reports indicate that the mBridge platform has cumulatively processed roughly $55.5 billion in live and simulated transactions, showcasing its growing capacity to handle substantial wholesale payment volumes despite its experimental status.
• September 20, 2026: Public disclosures confirm that the Saudi Central Bank has formally withdrawn from the mBridge project, leaving the platform without its heavyweight Middle Eastern institutional backing.

The Structural Transition: From BIS Incubator to Hong Kong Entity

The departure of the Bank for International Settlements in late 2024 was a watershed moment for mBridge, fundamentally altering its institutional character. Originally conceived under the neutral, highly trusted umbrella of the BIS—an international financial organization owned by central banks that fosters global monetary and financial cooperation—the project carried immense institutional prestige. When the BIS stepped back, citing the maturity of the platform, it forced the remaining members to construct an independent governance framework.

Consequently, the core steering group—comprising the People’s Bank of China, the Hong Kong Monetary Authority, the Bank of Thailand, and the Central Bank of the UAE—transitioned the project into a newly formed, Hong Kong-based legal entity. This new operating body is tasked with guiding mBridge toward a commercial rollout, scaling its operational capacity, and onboarding additional commercial and central bank participants.

However, this transition has not been without its critics. Operating outside the traditional Geneva-based oversight of the BIS places the burden of regulatory compliance, data governance, and international standard-setting squarely on the shoulders of the remaining central banks. Without the diplomatic and institutional shield of the BIS, mBridge is increasingly viewed through a sharp geopolitical lens, raising compliance hurdles that may deter prospective central bank participants who are wary of entangling themselves in systems operating outside conventional multilateral frameworks.

Saudi Arabia’s Strategic Calculus: Balancing BRICS and Washington

SAMA’s decision to exit mBridge after completing its technical proof of concept in May 2025 has invited intense speculation from international monetary economists and geopolitical analysts alike. While SAMA has maintained an official silence regarding the specific motivating factors behind the withdrawal—and previously emphasized that its participation was always intended to be exploratory—external analysis points toward a complex balancing act in Riyadh’s foreign policy.

Saudi Arabia has spent recent years aggressively diversifying its diplomatic and economic alliances. This strategy has manifested in the kingdom’s formal invitation to join the BRICS bloc, its deepening energy and trade ties with China, and its simultaneous reliance on robust security guarantees and deep financial integration with the United States.

Financial analysts suggest that Riyadh ultimately concluded that full, operational participation in mBridge carried too high a geopolitical cost. Because mBridge is explicitly structured to facilitate cross-border settlements that bypass the SWIFT messaging network and traditional dollar-clearing houses, it creates parallel financial plumbing. Washington has long viewed alternative payment systems with profound suspicion, fearing they could be utilized by rival nations—most notably China—to blunt the efficacy of United States financial sanctions and erode the global dominance of the U.S. dollar.

By stepping away from mBridge, Saudi Arabia appears to be signalling to Washington that it remains sensitive to Western compliance concerns and is unwilling to institutionalize channels that could be construed as undermining the dollar-centric international monetary order. Although Riyadh is more than willing to explore technological innovations that reduce transaction friction, crossing the Rubicon into an operational system designed to circumvent Western sanctions infrastructure proved to be a bridge too far for the kingdom’s risk calculus.

Broader Implications for Global Wholesale CBDCs

The withdrawal of Saudi Arabia from mBridge sends ripples far beyond the Middle East, offering a cautionary tale for the future development of cross-border central bank digital currency platforms. As central banks worldwide experiment with DLT to modernize legacy payment systems, the mBridge saga highlights the near-impossibility of separating monetary technology from hard geopolitical realities.

1. The Compliance Bottleneck: International payment platforms cannot scale successfully on technology alone. Without robust, globally accepted frameworks for anti-money laundering (AML), counter-terrorist financing (CTF), and sanctions screening, alternative CBDC networks will struggle to onboard mainstream commercial financial institutions. If major economies view a platform as a sanctions-evasion vehicle, participation will likely be restricted to sanctioned states or nations with a high tolerance for geopolitical friction.
2. The Fragmentation of Financial Architecture: Rather than fostering a unified global payment standard, initiatives like mBridge risk accelerating the fragmentation of the international monetary system. If platforms divide along geopolitical lines—with Western-aligned nations utilizing distinct networks and non-Western coalitions building isolated DLT rails—global trade could become more segmented, costly, and complex.
3. The Role of the BIS and Neutral Arbiters: The retreat of the BIS from mBridge demonstrates the limits of international organizations incubating projects that challenge the status quo of the global financial hegemony. Future multi-CBDC initiatives will need to carefully navigate the delicate balance between innovation and institutional neutrality to retain the participation of economically pivotal swing states like Saudi Arabia.

As the remaining architects of mBridge—China, Hong Kong, Thailand, and the UAE—press ahead toward a commercial rollout under their new Hong Kong-based governance structure, they do so with a leaner roster and a heavier regulatory burden. The absence of Saudi Arabia does not spell the immediate demise of the platform, but it severely limits its economic scope and underscores the profound difficulty of constructing a truly global payment system in an era of deepening geopolitical fragmentation.