Credit Unions & Microfinance: Modernize the Core on a Tight Budget

"Modernizing the core is for the big banks." It's the belief that keeps thousands of credit unions and microfinance institutions in the region trapped in precarious systems. And it stopped being true.

For years, modernizing the core meant a multimillion-dollar project within reach only of institutions with deep pockets: licenses of hundreds of thousands of dollars a year, two- or three-year implementations, whole IT teams. For a savings-and-credit cooperative or a microfinance institution, that was simply impossible, so they kept what they had. But the economic model of technology changed, and with it, who can modernize. The barrier is no longer size; it's the belief that it's still just as expensive.

A large sector, served by small technology

The segment isn't marginal—quite the opposite. In Mexico, savings-and-loan cooperatives closed 2025 with deposits close to 256 billion pesos and a performing portfolio that grew at double digits—11.7%—operating thousands of branches across the country, as El Cronista reported. Across the region, microfinance serves tens of millions of micro-entrepreneurs with a portfolio around $40 billion, spread across more than a thousand institutions, according to the Inter-American Development Bank. They're the institutions that reach where traditional banking doesn't: the base of the pyramid, the communities, the small loan. Their role in financial inclusion is enormous.

And yet, many run on legacy cores or improvised systems. The regional pattern is clear: up to 60% of the region's cores still run on legacy technology, per a 2023 Finnovista study cited by infrastructure provider Galileo, and maintaining those systems consumes a disproportionate share of the IT budget. For a small entity, that burden is suffocating: it pays dearly to keep something old running, and has nothing left to improve.

What changed: from CAPEX to OPEX

Here's the shift that makes viable what wasn't before. The traditional core was bought as a large capital investment—CAPEX: a huge upfront license, hardware, a long project. The modern cloud core is consumed as a service—OPEX: you pay for usage, with no big upfront outlay, and the cost grows with your operation instead of running ahead of it.

The difference for a small entity is the one that separates "impossible" from "achievable." In a pay-per-transaction or pay-per-use model, you don't need a big bank's budget to start; you need the cost to scale with you. And because the infrastructure is shared and efficient, the cost per account drops enough that serving a low-balance member—the heart of the cooperative business—stops being a loss. It's exactly the mechanism we already described for financial inclusion, applied to those who need it most.

Compliance also scales down

There's a point worth not ignoring: a limited budget doesn't mean a regulatory exemption. In Mexico, the CNBV supervises cooperatives by tiers according to their assets—levels I to IV for those exceeding 2.5 million UDIS—and each tier requires controls appropriate to its size, per the CNBV's own description of the sector. On top of that comes the safety net: FOCOOP covers members' savings up to 25,000 UDIS per person, as CONDUSEF reports. A cooperative that grows crosses regulatory thresholds, and its system has to be able to keep up with that demand. Here a modern cloud core has a quiet advantage: it brings compliance embedded and updates itself, instead of forcing a small entity to build and maintain those controls on its own. Modernizing isn't just efficiency; it's complying without a compliance team the size of a bank's.

The real cost is not doing it

Staying put seems like the cheap option, but it isn't. A legacy core gets more expensive every year—the talent that understands it grows scarce, maintenance rises—prevents offering what the member already expects (the app, instant payment, 24/7 transfers) and, sooner or later, collides with a regulatory requirement the old system can't meet. Meanwhile, the entities that modernize start competing for the same members with better service and lower cost. The cooperative that doesn't move doesn't stay the same; it falls behind.

How we see it at WAU

At WAU we design core modernization to fit those who don't have a big bank's budget: a pay-per-use OPEX model, without the CAPEX that used to make the project impossible, with embedded compliance and a low cost per account so serving the base of the pyramid is profitable. Modernization stopped being a privilege of the big players; it's a tool for the institutions that sustain financial inclusion to compete for real.

If your cooperative or microfinance institution needs to modernize but the budget was always the wall, let's talk. We'll show you how it's done without the investment you thought you needed. 👉 Book a conversation with our team.

Sources

• El Cronista — SOCAP deposits close 2025 at MXN$256,086M and performing portfolio +11.7% (2025)

• IDB — "A Giant in Microlending": microfinance in LATAM, ~US$40B portfolio across more than a thousand institutions (2014)

• Galileo (vendor) — Core banking modernization in Latin America: up to 60% legacy cores (2023 Finnovista study)

• CNBV — Savings and Loan Cooperatives (SOCAP): operation levels and supervision

• CONDUSEF — SOCAP: savings protection up to 25,000 UDIS via FOCOOP