Modernizing core banking systems is now a necessity for Southeast Asian banks

The banking landscape in Southeast Asia is changing rapidly. With a young, digitally-savvy population and a boom in digital solutions, customer expectations for personalized, on-demand services are on the rise. At the same time, competition from nimble fintechs and neobanks is intensifying, forcing traditional banks to adapt or risk being left behind.

A recent report by the Boston Consulting Group (BCG) and a related article highlight a critical issue for banks in this region: the urgent need to modernize their core banking systems (CBS). While many banks have focused their digital transformation efforts on front-end channels like mobile banking and CRM, their underlying CBS – often decades old – cannot keep pace with modern demands. This is not just a technology problem; it is a strategic, business-critical imperative.

Core banking systems are the “central nervous system” of a bank, handling mission-critical functions like deposit booking, lending operations, and record keeping. Yet, the average age of a CBS in Southeast Asian banks is 20 years or more. The vast majority (90-95%) of these banks still rely on older, on-premises mainframe systems. This reflects a significant technology gap of at least two generations, as most modern platforms are now cloud-ready or cloud-native.

Historically, banks have been hesitant to undertake large-scale modernization, opting instead for incremental changes and customizations. This piecemeal approach has resulted in complex, highly customized platforms that the BCG report likens to a “Frankenstein’s Monster”. These legacy systems are ill-equipped for today’s fast-paced, digital-first environment. They are focused on static workflows and batch processing, making them inflexible and unscalable. They also pose challenges with data accessibility and real-time processing, which leads to higher costs and missed opportunities.

The BCG report identifies eight key imperatives that make a compelling case for urgent CBS modernization:

Customer Expectations: Modern customers expect the same on-demand, personalized services from their banks that they get from other digital platforms. Legacy systems, with their static workflows and lack of configurability, simply cannot deliver this level of service.

Digital Competition: Fintechs and neobanks are setting a new standard with seamless, fully digital experiences and innovative features. Legacy CBS, which are often batch-based, lack the flexibility and integration capabilities to compete effectively.

New Revenue Opportunities: To stay competitive, banks need to integrate with third-party ecosystems through open banking and embedded finance. However, legacy systems use proprietary protocols, making such integrations extremely difficult.

Data-Driven Operations: Banks need to leverage data for improved efficiency, anomaly detection, and predictive insights. Legacy systems often lack the ability to log comprehensive events or provide seamless access to data, hindering a bank’s ability to gain valuable insights

Newer Technologies: The rise of digital banking demands scalability, agility, and efficiency. Legacy technology stacks struggle to handle the high volumes and dynamic surges of modern digital campaigns, leading to operational issues and higher costs.

Cost Efficiency: Maintaining legacy mainframe systems is expensive. The lack of features like auto-scaling to handle transaction volume spikes means banks must invest in permanently adding capacity, which is not cost-efficient.

Regulatory Demands: Regulators are increasingly imposing stringent demands for IT resilience. Legacy systems cannot always meet the complex recovery requirements needed during a critical incident, which can lead to significant penalties, as seen with a Singapore-based bank fined for multiple service disruptions.

Employee Expectations: Bank employees, like customers, expect modern, intuitive tools. The cumbersome interfaces and lengthy deployment cycles of legacy CBS can lead to frustration and make it difficult for banks to attract and retain top talent.

The challenges posed by aging CBS are no longer something banks can ignore. While modernization is complex and carries risks like cost overruns and management exits, the cost of inaction is far greater. Modern CBS platforms offer the agility, scalability, and resilience needed to deliver exceptional customer experiences, unlock new growth opportunities, and compete in the digital age. Modernization is not a choice or a tech-only agenda; it is a strategic business necessity for banks in Southeast Asia to avoid being left behind.