A quiet revolution is transforming the way Southeast Asia handles money, yet much of the world remains largely unaware. This revolution is driven by the rapid adoption of digital payment systems, mobile wallets, and fintech innovations, reshaping economies and empowering millions. From bustling urban centers to remote rural areas, people are embracing cashless transactions, fostering financial inclusion and creating new opportunities for businesses and individuals alike.
Key Takeaways
- ASEAN’s digital payments boom: By 2023, digital payments made up 50% of transactions in ASEAN, projected to reach $416.6 billion by 2028.
- Interoperability as a foundation: Public-sector leadership ensured systems like Thailand’s PromptPay were designed to be interoperable, low-cost, and widely usable, avoiding fragmented closed-loop systems.
- Regional connectivity: Thailand and Singapore launched the world’s first bilateral real-time payment linkage in 2021. Since then, ~20 bilateral linkages have been established across ASEAN for remittances and QR payments.
- Limits of bilateral systems: Bilateral agreements are not scalable. Multilateral projects like Project Nexus aim to standardize cross-border payment connections.
These aren’t numbers generated by a single tech giant or a Silicon Valley moonshot. They are the product of deliberate, state-led infrastructure building that deserves serious examination.
The Interoperability Imperative
The story begins with interoperability, and it begins with a deceptively simple insight. As Pariwat Kanithasen, former Deputy Director of Payments & Fintech at the Bank of Thailand, puts it: without the public sector push for interoperability as a core design principle, the region would most likely have ended up with fragmented, closed-loop systems run by individual players, the payment equivalent of proprietary phone chargers, where no universal standard exists.
That analogy deserves to land with full force. Much of the fintech world, from the United States to Europe, has spent years trying to retrofit interoperability onto systems built for competition and exclusivity. ASEAN, at its best, built it in from the start.
Thailand’s PromptPay is the clearest embodiment of this philosophy. Designed with low fees, phone-number-based transfers, and broad use cases spanning person-to-person, business-to-business, and government payments, it achieved something that purely market-driven systems rarely accomplish: it generated network effects powerful enough to pull the entire economy along.
This is not an accident. It is what happens when public infrastructure is treated as public infrastructure.
A Truly Connected Region
The results at the regional level have been equally striking. The world’s first bilateral real-time payment linkage, connecting Thailand’s PromptPay and Singapore’s PayNow, went live in 2021. Since then, countries across Southeast Asia have established around 20 such bilateral payment linkages, covering both remittances for migrant workers and QR payments for tourists. For a region as geographically fragmented and economically diverse as ASEAN, this is a genuinely remarkable achievement.
But this is precisely where honest analysis must complicate the celebration. Bilateral linkages, for all their success, carry the seeds of their own limitations.
They are not scalable in the long run, and industry leaders know it. The shift toward multilateral solutions like Project Nexus, which aims to create a plug-and-play model for cross-border payments, standardising the way instant payment services connect, is the acknowledgment that twenty bilateral agreements are not the same as one coherent regional network.
The math of connectivity is brutal: every new participant in a bilateral-only world requires a new set of negotiations, integrations, and legal alignments. Multilateral architecture solves this problem in principle. Executing it is another matter entirely.
The obstacles are neither trivial nor purely technical. Fragmentation persists on the technical side, with differing levels of adoption of ISO 20022 standards and misaligned QR frameworks. On the business side, foreign exchange settlement and pricing remain pain points.
And on the legal side, differences in payment laws and regulations across jurisdictions must still be overcome. None of these challenges is insurmountable, but none of them will resolve themselves through market forces alone. This is fundamentally a governance problem, which means it requires governance solutions.
Leveraging Payments to Strengthen Economic Sovereignty
There is also the question of what digital payments are actually for. The economic case is compelling enough on its own terms: faster, cheaper, more transparent transactions benefit businesses and consumers alike.
But Kanithasen points to something deeper. When payment systems are connected, transactions no longer need to pass through multiple jurisdictions, which reduces foreign exchange costs and improves speed and transparency. More importantly, this supports the use of local currencies, allowing parties to transact directly with each other rather than routing through a third currency, which strengthens local currency usage and makes cross-border payments more accessible, especially for small and medium-sized enterprises.
This is not a minor point. In a world where the Global South is actively reconsidering its dependence on dominant reserve currencies and the geopolitical leverage they carry, regional payment connectivity becomes a tool of economic sovereignty, not just operational efficiency. The ability to settle trade in Thai baht and Indonesian rupiah, rather than routing everything through dollars, represents a quiet but meaningful shift in how regional economic relationships are structured.
Trust is the Foundation That Can’t Be Replicated or Downloaded
None of this happens automatically. As systems scale, outages can have a wide systemic impact, and fast payments also enable fast fraud, making it essential to put preventative safeguards and responsive measures in place that evolve just as quickly as the systems themselves. The infrastructure, in other words, is only as good as the trust built around it.
ASEAN has done something genuinely difficult: it has built a regional payment infrastructure that works, that people use, and that is already changing lives for migrant workers sending remittances home and small businesses trading across borders.
The temptation now will be to declare victory. The wiser path is to treat what exists as a foundation, not a finish line. Being in a leadership position in payments in ASEAN isn’t about going first. It is about bringing others along and helping shape shared standards. That is as good a principle for regional integration as any, and the region would do well to hold onto it.
