SBS modernises Nationwide Building Society Buy-to-Let

Nationwide Building Society has completed the migration of its Buy-to-Let service to the cloud, alongside an upgrade of its core platform provided by SBS.

The go-live, finalised over the weekend, includes a transition to infrastructure hosted on Amazon Web Services (AWS). The programme was delivered in collaboration with IBM and SBS, with the organisations citing close coordination across delivery teams as a key factor in meeting timelines despite the project’s complexity.

The move forms part of Nationwide’s broader digital transformation agenda, aimed at modernising legacy systems and improving operational scalability. For mutuals and mid-tier lenders, cloud migration and core system upgrades have become central to maintaining competitiveness in mortgage and specialist lending markets, particularly as demand grows for faster product iteration and improved digital servicing.

Buy-to-Let lending remains a significant segment of the UK mortgage market, requiring lenders to manage complex underwriting, regulatory compliance, and portfolio monitoring processes. By upgrading its core platform and shifting to cloud-based infrastructure, Nationwide is expected to benefit from enhanced system resilience, improved performance, and greater flexibility in deploying future product enhancements.

The implementation underscores a wider industry trend in which established financial institutions are partnering with technology providers to accelerate core modernisation programmes. Cloud-based core banking platforms are increasingly seen as foundational to supporting data-driven decision-making, cost efficiency, and long-term scalability.

While financial terms of the project were not disclosed, the successful migration marks a milestone in Nationwide’s technology roadmap and reflects continued momentum in large-scale core transformation initiatives across the UK financial services sector.