Source: The Fintercept
For decades, ACH processing has been one of the most locked-in corners of banking technology. Banks chose their processor and never looked back. The switching costs were too high, the risk too uncomfortable, and frankly, the systems worked well enough.
That’s changing fast.
Right now, dozens of banks are actively migrating their ACH processing to cloud-native platforms. Some are running parallel systems, others are in the process of decommissioning their legacy mainframes entirely. This is a significant wave of payment modernization, one that deserves attention from those not yet closely following it.
A few things converging at once broke the logjam. ACH volume hit 35.2 billion payments in 2025, up nearly 5% year over year, and the value of those payments reached $93 trillion. The rail is growing, not shrinking — and Nacha is proposing to raise the same-day ACH limit from $1 million to $10 million, which would push even more volume through systems that are already straining. Meanwhile, Nacha’s 2026 fraud monitoring rules require real-time capabilities that legacy batch-based processors on mainframe architectures cannot deliver.
The legacy providers’ grip on this market is finally loosening. For years, banks felt they had no alternative as the incumbents controlled the relationships, the certifications, the institutional knowledge. Now there are proven cloud-native platforms processing ACH (and other rails) at scale for institutions ranging from community banks to some of the largest in the country. The migration path now exists.
ACH moves more money than any other payment rail in the United States. It touches every payroll, every mortgage payment, every direct deposit. Banks cannot take the status quo for granted – they need to focus on preparing for what their customers want. The massive wave of modernization under way, re-platforming core bank infrastructure bank by bank, demands far more attention than it’s currently getting.
Planning your ACH migration? Speak with our ACH experts to start your modernization journey.
Author:
Booshan Rengachari – Founder and CEO, Finzly
