UPI's global expansion involves bilateral payment linkages with countries like Singapore (PayNow-UPI), UAE (AANI-UPI), and France (Lyra-UPI). NPCI International launched UPI services across 10+ countries including Bhutan, Nepal, Sri Lanka. G20 presidency showcased UPI as digital public infrastructure model. Cross-border QR code payments operational in select merchants abroad. RBI promotes UPI for remittances, reducing correspondent banking costs. Current focus on ASEAN integration and Africa expansion through fintech partnerships.

UPI's global expansion represents India's strategic push to internationalize its digital payment infrastructure and reduce dependence on Western payment systems like SWIFT. The initiative operates through three models: direct bilateral linkages where UPI connects with foreign fast payment systems (PayNow-Singapore, AANI-UAE), acceptance of UPI QR codes by international merchants, and domestic UPI services for Indian diaspora abroad. This expansion supports India's broader financial diplomacy goals, particularly in promoting rupee internationalization and reducing dollar dependency in trade settlements. For remittances, UPI offers cost advantages over traditional channels, with transaction costs below 1% compared to 6-8% through conventional methods. The G20 presidency positioned UPI as a template for developing nations to build inclusive digital payment ecosystems. However, regulatory challenges remain around KYC harmonization, AML compliance across jurisdictions, and currency settlement mechanisms. Success depends on reciprocal arrangements, regulatory alignment, and merchant adoption in partner countries.