SAMA leaves mBridge eleven months after upgrading to full participant

Eleven months is how long SAMA held full participant status on mBridge, from the June 2024 upgrade to the 13 May 2025 sign-off on its minimum viable product ^[1][2][13]. Observer status came in 2023 ^[3]. The whole engagement ran about two years ^[14], and it ended at the point where the remaining members turn toward a commercial rollout ^[4].

mBridge has moved money. About $55.5bn of transactions had gone through by late 2025, according to cryptobriefing ^[10]. If that figure is cumulative from the BIS launch in 2021 ^[11], it works out to roughly $12bn a year across the central banks of China, Hong Kong, Thailand and the UAE ^[4][15]. The design promise was days to seconds: wholesale CBDCs settled on shared distributed ledger infrastructure, with less correspondent banking in between ^[5].

cryptobriefing argues the withdrawal was Riyadh declining to be associated with a platform that bypasses SWIFT and dollar clearing, the infrastructure Western governments have used to enforce sanctions ^[17]. That inference is the publisher's, and the article does not quote a SAMA official giving a reason. On the record is SAMA's own framing, that the involvement was always intended to be exploratory ^[6], alongside the kingdom's membership of BRICS and its defence and energy ties to the US ^[7].

In my view the sequence is the interesting part, or rather how cheap it was: observer, participant, out, with the proof-of-concept phase giving Saudi officials a view of the technical capabilities without locking the kingdom into a commercial relationship ^[8]. Timing fits the same dates: the BIS ended active involvement in October 2024, four months into SAMA's participation ^[12][16], and framed that departure as a natural consequence of project maturity ^[20]. So does economics, that the corridor volume did not justify the integration work.

The view would change if SAMA rejoined, or appeared as a member of the new Hong Kong-based entity the four remaining central banks are building toward ^[4]; or if a Saudi oil invoice settled on the platform, since cryptobriefing says SAMA's presence raised the possibility that oil settlements might eventually flow through non-dollar digital channels ^[18]. Neither has happened. Vision 2030 still commits the kingdom to modernising payment systems ^[21], and the distinction cryptobriefing draws is between researching CBDCs as a technology and committing to a specific multilateral platform ^[9]. The BIS has left and so has Saudi Arabia; the publisher says mBridge faces increased questions about governance and international standards compliance, particularly on sanctions, as it becomes an independently operated platform ^[19].