How to Use UPI in Thailand (PromptPay Link)

The UPI-PromptPay integration connects India's and Thailand's national real-time payment infrastructures, allowing a UPI transaction to be processed and settled with a participating Thai merchant through PromptPay's network. This follows the same bilateral linkage approach NPCI International has used to expand acceptance into other countries individually.

1. Confirm your UPI app supports international payments and activate any specific travel toggle it requires.

2. Check with your bank that international UPI transactions are permitted on your specific account.

3. Understand the currency conversion, since a Baht-denominated payment converts at the prevailing rate, typically with a forex markup applied.

4. Carry a backup card or some cash, since acceptance through the PromptPay link remains limited to specific participating merchants.

Additional Read: The Future of UPI: Faster, Safer, and Everywhere

Acceptance through the PromptPay link is concentrated among merchants specifically onboarded to the cross-border system rather than spanning every business across Thailand broadly, consistent with the pattern seen in UPI's other early-stage international integrations. It is genuinely useful where available, but not yet a comprehensive primary payment method for an entire Thailand trip.

Domestic UPI use back home, including a credit card bill payment, continues running entirely within India's own payment rails and remains unaffected by any international feature activated for your trip.

Unfamiliar merchants, public Wi-Fi networks, and payment terminals abroad all raise the stakes if your app or card details are ever compromised during a trip. Taking a few extra precautions specifically for international travel, rather than assuming your usual habits at home are automatically sufficient, is worth doing before you depart.

Activating Stashfin's Cyber Fraud Cover before departure, with plans starting at Rs. 49 for 3 months, adds a 24x7 cyber expert helpline, card block assist, and UPI fraud reporting for the duration of your trip.

A failed cross-border UPI payment through PromptPay follows the same core reversal principle as any domestic failure, with any amount debited without a successful merchant credit expected to reverse back to your account, though cross-border reconciliation between the Indian and Thai systems can take a few extra days compared to a purely domestic reversal.

Thailand's PromptPay link joins Malaysia's PayNet integration as part of a broader pattern of NPCI International steadily building cross-border payment corridors across Southeast Asia, a region with significant Indian tourist traffic. Travelers planning a wider regional trip should check the current acceptance status for each specific country separately, since these integrations are negotiated bilaterally rather than as one unified regional rollout.

If a specific merchant does not display any UPI acceptance signage or QR code, it is safest to simply assume they are not part of the PromptPay link rather than asking staff to attempt a workaround, since an unofficial attempt to force a UPI payment through an unsupported merchant terminal is more likely to cause confusion or a failed transaction than a successful one. Falling back to your backup card or cash in these situations remains the more reliable choice. It also helps to check your UPI app's own list of supported international merchants before your trip, since some apps display this information directly within a dedicated travel section, saving you the trouble of guessing which specific counters will actually accept the payment.

For everyday domestic payments between trips, Stashfin's UPI service lets you scan and pay to any mobile number or UPI ID, or move money to your own bank account, funded through your Stashfin Credit Line, RuPay credit card, or a standard bank transfer, remaining the dependable option you return to once you are back home.

• UPI and PromptPay, Thailand's national payment system, are linked to enable cross-border transactions between the two countries.

• Enable your app's international payments feature and confirm with your bank before relying on UPI in Thailand.

• A currency conversion, typically with a forex markup, applies to any UPI payment made in Baht.

• Acceptance remains concentrated among merchants specifically onboarded to the PromptPay link, not universal across Thailand.

• A failed cross-border payment follows the same reversal principle as a domestic one, though reconciliation can take a few extra days.