Bank executives know the problem well. Legacy core banking systems can't handle today's demands for instant payments and real-time authorization. Most assume that the answer is replacing the core — a headache typically avoided for obvious reasons.
Full replacement projects regularly blow past budgets, while research from IBM shows fewer than half of banking CIOs see meaningful gains from core modernization. Some banks actually perform worse after implementation.
Even still, The Federal Reserve Bank of Kansas City confirms that full core replacements remain rare, especially among smaller institutions. The risks are enormous, requiring total leadership commitment and perfect coordination. And when core providers control your data, migration alone costs a fortune.
Given these challenges, banks need a different approach: one that delivers modern capabilities without wholesale replacement.
Why digital twins work
That alternative exists in digital twin technology, which creates a real-time ledger that operates alongside your existing core. Select accounts get replicated to the digital twin, which then authorizes transactions and updates balances whether the core is operational or offline.
The division of labor is straightforward: your core continues doing what it does best — generating reports, calculating fees, managing compliance — while the digital twin handles the high-velocity, real-time authorization that modern payment rails demand.
With more than half of FedNow and RTP transactions happening outside traditional banking hours, financial institutions need systems capable of authorizing transactions at any time, not just during scheduled availability windows.
Three key benefits
Digital twin technology addresses the core replacement challenge through three distinct advantages:
Continuous operation. The digital twin authorizes transactions regardless of core status. Maintenance windows become invisible. Upgrades don't interrupt service. You get genuine 24/7 banking without replacing everything.
Cost efficiency. Traditional cores charge per transaction and balance inquiry. Digital twins charge a modest per-account fee. As transaction volumes rise, the economics increasingly favor high-velocity processing.
Innovation enablement. The digital twin creates a real-time data layer supporting modern development. Build instant payment portals, integrate fintech partners through APIs, deploy AI fraud detection, all without touching the core.
The open banking factor
Regulatory requirements add another dimension to the modernization challenge. Open banking regulations require real-time access to balances and transaction histories for authorized third parties. Every request to a traditional core creates cost and performance issues.
Digital twins solve this. Channels and authorized parties pull balance information from the twin, not the core. If the core is down for maintenance, the twin stays available. Third-party integrations work consistently.
This architecture also simplifies compliance. Legacy systems struggle with requirements for real-time monitoring and data sovereignty. The digital twin creates a buffer between external demands and internal systems.
Enabling AI applications
The benefits extend to emerging technologies as well. AI applications need timely, structured, high-quality data — something legacy cores weren't built to provide. Data extraction requires custom development and extensive transformation.
Digital twins maintain current, structured data that AI applications consume directly. Fraud detection analyzes patterns in real time. Predictive analytics work with fresh information, not day-old batch outputs. Customer service accesses accurate balances instantly.
Beyond fraud detection, you can identify churn risks from spending patterns, deliver personalized recommendations at the right moment, and optimize operations through continuous transaction analysis. None of this works with delayed data.
Why this matters now
Banking is racing toward real-time operation, and customer expectations now reflect experiences outside financial services where instant gratification has become standard. Banks still relying on batch processing will steadily lose ground to more responsive competitors.
The strategic choice is clear. While some institutions genuinely need wholesale replacement, most need infrastructure that augments rather than replaces, builds rather than discards, and enables rather than disrupts. Digital twin technology bridges the gap between legacy stability and modern capability, letting banks preserve their core investments while gaining the infrastructure needed for instant payments, open banking, and AI applications. The result is transformation without betting the entire institution on a multi-year project with uncertain outcomes.
The question facing bank executives is how to modernize effectively. Digital twin technology offers a proven path that requires investment, commitment, and change management, but not a complete institutional bet.
The competitive stakes are rising. Banks that embrace infrastructure augmentation will compete effectively in the real-time era. Those that delay will face escalating costs and mounting operational constraints. The window for action remains open, but the urgency continues building.
Carlos Netto is CEO of Matera, a modern technology technology company offering banks and credit cards solutions for core banking, instant payments and QR code payments.
