Indonesia is one of the most compelling growth stories in Asia. The country spans 6,000 inhabited islands, 300 ethnic groups and 700 languages, making it one of the most complex consumer markets on the planet. Half of the 287 million population is under 35.

GDP is expected to reach $1.55 trillion in 2026, off the back of sustained 5% growth over recent years. The government’s Golden Indonesia Vision sets a clear destination: advanced economy status by 2045. The trajectory is real. So is the pressure on every institution that wants to be part of it.

However, cash remains king.

Indonesia has one of the largest unbanked populations in the world. According to the World Bank Findex report, only 56% of adults hold a formal bank account; just 43% have made or received a digital payment; only 27% save formally and 15% borrow formally. Yet 80% own a mobile phone.

Physical branches have never reached the archipelago’s more remote communities. But infrastructure alone doesn’t explain why a significant portion of the urban population remains outside the formal banking system. That is a product failure and a trust issue.

Many Indonesians simply do not match a traditional customer profile, with irregular income, informal employment, no fixed address, no identity documents, and limited financial literacy. Some keep money in cash or within community networks. Many use mobile wallets like GoPay, OVO, DANA or ShopeePay without ever opening a bank account, as these platforms offer a faster, more accessible, and cheaper alternative to traditional banking.

Indonesia’s financial inclusion mandate, a critical pillar of Golden Vision 2045, aims for 98% inclusion to foster equitable economic growth and high-income status. This is pushing banks to build digital experiences for people who have never set foot in a branch.

The Otoritas Jasa Keuangan (OJK), Indonesia’s financial services authority, has played a key role in increasing accessibility to, and competition in, financial services. It has adopted a framework that allowed traditional banks to operate as digital-only banks; issued new banking licences, which has led to at least 17 digital banks operating or in transition as of early 2026; and facilitated the acquisition of struggling banks by big tech companies, including Gojek or Sea Group, to turn them into digital-only entities.

In addition, Bank Indonesia (BI), the central bank, is driving an open banking agenda that is reshaping how digital infrastructure is assembled. For banks, that is both a regulatory obligation and a structural opportunity.

The opportunity is real. The infrastructure to capture it is not. That is a platform problem.

No need to rip out the core

The regulatory direction in Indonesia is clear: openness, interoperability, and speed. Regulators are not waiting; therefore, banks need to modernise their digital channels fast. But they can’t build from scratch quickly enough, and large vendors are either too expensive, too slow, or simply not built for the Indonesian market.

This is where decoupled architecture has a decisive advantage. When the customer experience layer operates independently from the core, banks can move at the speed of the market without waiting for a vendor’s release cycle.

Using this approach, Indonesian banks don’t have to choose between moving fast and getting it right. They can go live with a modern customer experience in three to nine months and modernise the underlying infrastructure progressively, at their own pace, without a big-bang replacement that puts the entire business at risk.

But this requires architecture that is truly decoupled, where changes to the front-end experience won’t require changes to the core, and vice versa.

Digitally-enabled personalisation

Serving such a geographically fragmented and culturally diverse country is one of the more difficult design problems in financial services. Most digital banking platforms are built on three assumptions: a relatively homogeneous user base, reliable connectivity, and a single language. None of these assumptions hold in Indonesia.

The answer is not to build different apps for each of the 6,000 islands. It is to build one platform that can adapt to all of them, where localisation is built in from the start, not bolted on at the end. One where the customer experience can be adapted without touching the underlying banking logic, and designed for variable connectivity rather than assuming 4G everywhere.

A bank in Sulawesi and one in Jakarta are serving fundamentally different customers. A banking platform has to give each of them the freedom to build for their specific context without starting from scratch every time.

The cultural dimension is equally important and consistently underappreciated. Financial trust in Indonesia is community-rooted. The institutions that will win are the ones that build digital experiences that feel local, not like a Western neobank translated into Bahasa Indonesia. That requires genuine product freedom: the ability to build features that reflect a specific community’s relationship with money, not a cookie-cutter template with a logo swap.

When the product is wrong for the customer, the customer stays away. That is not a failure of the customer’s sophistication but a failure of the product’s imagination.

Built to adapt

The regulatory direction is accelerating on multiple fronts at once. Blueprint 2030 is pushing for deeper integration across banking, fintech and e-commerce, with open banking as the connective tissue. BI’s Project Garuda is piloting the Digital Rupiah, a programmable central bank digital currency designed for cross-border payments and regional interoperability.

These are not isolated initiatives. They are parts of the same structural shift: Indonesia is building a financial system where everything connects, and banks that cannot plug in will be left outside it.

Incumbent banks must accelerate their digital transformation to meet changing regulatory requirements, as well as survive increasing competitive pressure from digital challengers.

The institutions that will succeed are the ones with platforms that can launch a digital experience in months, integrate with alternative ID and credit data sources, and build lending or payments products designed for customers who have never had a bank account. That is the infrastructure that closes the banking gap. The institutions that get there first will not need the biggest budget. They will need the right platform.

Featured image by aileenchik on Freepik