Wallet interoperability across South-East Asia
Regional QR interoperability is real, but the fine print keeps the promise from arriving evenly across markets.
The regional QR linkages across South-East Asia — the domestic schemes of Thailand, Singapore, Indonesia, the Philippines, Malaysia, and Vietnam, plus the various operator bilateral agreements — have been quietly maturing. The consumer experience for a traveller now looks a lot like using a single wallet across borders. The merchant experience is more complicated.
Written March 2026 from a review of merchant onboarding flows across three markets.
What works
The consumer path works well. A Singaporean traveller in Bangkok can scan a Thai QR and pay from their SGD account. The FX is transparent. The receipt is coherent. This is a real achievement.
What doesn't
The merchant side of the same transaction is still complicated:
- Settlement timing. Some corridors settle same day; others take T+1 or T+2. Merchants integrating multiple corridors need to model different timings.
- MDR (merchant discount rate) variance. The MDR a merchant sees for a foreign-QR transaction can differ substantially from a domestic one. This isn't always clearly disclosed.
- Refund flows. Cross-corridor refunds are still slow. Some corridors don't support them at all; merchants have to do off-rail refunds through their own bank.
What to plan for
If you're building for a regional merchant footprint, model corridor variance as first-class metadata on every transaction. The temptation to treat "a QR is a QR" is real; it produces reconciliation problems later.