Singapore's Interbank GIRO, commonly referred to as IBG, is one of Southeast Asia's longest-running automated clearing house systems. Established in the 1980s under the governance of the Association of Banks in Singapore and operated by Banking Computer Services, the system processes batch credit and debit transfers that underpin much of the city-state's routine financial activity.
In 2024, IBG handled approximately 492,000 transactions per day with a total daily throughput of around SGD 2.7 billion. These figures reflect the system's role as the primary channel for recurring payments including salary crediting, dividend distributions, insurance premium collections, pension payments, and government disbursements. While Singapore's FAST system handles instant peer-to-peer and retail transfers, IBG remains the preferred rail for high-volume batch processing where same-day finality rather than real-time speed is the priority.
Approximately 50 financial institutions participate in the IBG network, encompassing all major domestic banks, foreign bank branches, and several of Singapore's newer digital banks including GXS Bank and Maribank, both of which joined in mid-2024. Participating institutions submit batch files to the clearing system with a weekday submission deadline of 12:00 SGT and settlement completed by 18:15 SGT. Saturday operations run on a compressed schedule with submissions due by 09:00 SGT and settlement by 14:30 SGT.
A significant governance transition took place in June 2025 when oversight of IBG and other shared payment infrastructure transferred from the Association of Banks in Singapore to the newly established Singapore Payments Network, known as SPaN. This entity, set up under the guidance of the Monetary Authority of Singapore, consolidates governance of Singapore's domestic payment schemes under a single body, bringing IBG alongside FAST, PayNow, and SGQR under unified oversight. The move reflects the regulator's broader strategy to ensure that Singapore's payment infrastructure remains cohesive as the ecosystem grows more complex.
Despite the rise of instant payments through FAST and PayNow, IBG's volumes have remained stable. The system continues to serve use cases where batch processing offers clear operational advantages. Employers process thousands of salary payments in a single file submission, utility companies collect direct debit mandates in bulk, and government agencies disburse benefits to large populations through the same infrastructure. The cost structure also favours IBG for high-volume, lower-urgency payments, as batch processing fees are typically lower than instant payment charges.
Singapore's payment landscape is among the most digitized globally, with electronic payments accounting for the vast majority of all transactions by value. Within this ecosystem, IBG occupies a foundational layer that rarely attracts attention but processes volumes comparable to many countries' entire payment systems. As SPaN consolidates governance and Singapore continues to refine its payment infrastructure, IBG is expected to remain operational for the foreseeable future, serving the batch processing needs that instant payment systems are not designed to replace.