Project Nexus Is Quietly Wiring Five ASEAN Countries Into One Payment System
The Bank for International Settlements initiative Project Nexus is connecting the domestic instant payment systems of Malaysia, Singapore, Thailand, Indonesia and the Philippines. When it goes live, sending money across ASEAN could become as simple as sending it across town.
One of the most consequential infrastructure projects in Southeast Asian finance is being built with almost no public attention. Project Nexus, an initiative of the Bank for International Settlements, is connecting the domestic instant payment systems of Malaysia, Singapore, Thailand, Indonesia and the Philippines into a single interoperable network. When it is fully live, moving money between these countries could work much like moving it within one.
What Nexus is trying to solve
Each ASEAN country has built an excellent domestic instant payment rail. Thailand has PromptPay, Singapore has PayNow, Indonesia has BI-FAST, Malaysia has DuitNow. Domestically these are fast, cheap and near universal. Crossing a border, however, has traditionally meant falling back on correspondent banking, with its delays, fees and pre-funded accounts.
Nexus addresses this by standardising the connection rather than building bilateral links one pair at a time. Instead of every country negotiating a separate arrangement with every other country, each connects once to a common framework.
It is already happening bilaterally
Even before Nexus completes, cross-border QR is spreading fast. According to Nation Thailand, Thailand's PromptPay system already connects through cross-border QR links with Singapore, Vietnam, Indonesia, Laos, Japan and Hong Kong.
The consumer experience is already tangible. Cake by VPBank, one of Vietnam's leading digital banks, launched a feature in 2026 letting Vietnamese users pay directly from their domestic dong accounts in Thailand, Laos and Cambodia, without opening a foreign currency account or carrying cash.
Why the scale matters
The volumes involved are substantial. According to the Chambers and Partners Fintech 2026 Thailand guide, PromptPay and Thai QR account for approximately 44 percent of account-to-account electronic payments in Thailand. Across the region, digital payment transactions are projected to exceed 1.5 trillion dollars in 2026 according to the Money20/20 Future of Fintech in APAC report.
Connecting rails of that scale changes the economics of regional commerce. A Thai small business selling to Malaysian customers, a Filipino worker sending money home from Singapore, an Indonesian tourist paying in Bangkok, all currently pay a friction tax that Nexus is designed to remove.
Each country already has a fast, cheap domestic rail. Nexus is about making the border stop being the expensive part.
The competitive implication for banks and fintechs
Cross-border remittance and payment margins have historically been protected by complexity. When a regional network makes transfers instant and cheap at the infrastructure layer, that protection erodes. Providers whose value rested on navigating the complexity will need a different proposition.
The opportunity is equally real. Any business selling across ASEAN gains a materially simpler payment environment, and any fintech building services on top of connected rails inherits reach it could never have built alone.
What brands should do now
The practical move is to understand which rails matter in each target market and design for them. In Thailand, PromptPay support is effectively mandatory. Across the region, wallets including TrueMoney and Rabbit LINE Pay carry substantial share. As Nexus links these systems, brands already integrated locally will find regional reach arrives largely for free.
This is exactly where SpinDepth helps, positioning financial brands credibly as Southeast Asia's payment infrastructure knits together.
FAQs
Q1: What is Project Nexus?
A1: A Bank for International Settlements initiative connecting domestic instant payment systems across Malaysia, Singapore, Thailand, Indonesia and the Philippines into an interoperable network.
Q2: Is cross-border QR already available?
A2: Yes, bilaterally. Thailand's PromptPay connects with Singapore, Vietnam, Indonesia, Laos, Japan and Hong Kong, according to Nation Thailand.
Q3: How large are these payment systems?
A3: PromptPay and Thai QR account for roughly 44 percent of account-to-account electronic payments in Thailand, and regional digital payments are projected above 1.5 trillion dollars in 2026.
Q4: Who benefits most?
A4: Consumers, small businesses trading regionally, and fintechs building on connected rails. Providers whose margins depend on cross-border complexity face pressure.
For brands entering the region, connected payment rails mean regional reach is becoming default, and that is exactly where SpinDepth helps brands show up.
Source:
Source 1: Bank for International Settlements, Project Nexus
Source 2: Nation Thailand, Thailand's Digital Payment Revolution
Source 3: Chambers and Partners, Fintech 2026 Thailand
Source 4: Fintech News Singapore, PromptPay as a Blueprint to Modernize Trade Finance