Why 40% of core banking implementations fail — and how to avoid the statistic

This is not rare — it is the norm

A 40% failure rate is not bleak statistics — it is the regional norm. Public cases are rare: banks do not like admitting failures, and integrators reframe them as “successful projects with adjusted scope”. But if you collect anecdotal evidence across CIS and Central Asia over the last 10 years, the picture becomes clear — every third or fourth core banking replacement project ends either far from the original plan or in rollback.

The root cause is shared — bank maturity, not the vendor

All six systemic failure causes converge on one: the bank decides to replace its core out of weakness, not strength. Weakness shows up in unformalized product policy, dirty data, an IT team unable to lead the project, and business transferring ownership to IT. In that state any core — Temenos or in-house — will hit the same walls.

What actually works

The correct order is the reverse of what banks usually do. First — bring order around the existing core: automate processes, clean data, formalize products, build manageability. This takes 6-18 months and delivers 60-70% of the target effect. Only after that does a core replacement become meaningfully plannable — and often the answer turns out to be that it is no longer needed.

CTA

If a core replacement project is already underway and running off track — stop it and run an independent audit. If it is only being discussed — the right first step is an audit of bank maturity, not a request for proposals to vendors.