Nationwide cautions on quantifying AI returns despite broad staff rollout

Nationwide has cautioned that the financial benefits of workplace artificial intelligence remain difficult to measure, even as the building society expands its deployment of the technology to approximately 16,000 employees. The lender is currently rolling out premium Microsoft 365 Copilot licences to around 1,000 staff within its combined finance team, while roughly 2,500 engineers are utilising Github Copilot. Paul Ballard, the technology transformation director, acknowledged that staff are using the tools more frequently and completing tasks at a faster pace. However, he stated that the organisation has not yet established a precise correlation between these operational improvements and its bottom line. Ballard noted that while the value is visible, translating that into concrete financial metrics remains an ongoing challenge.

The building society joined Microsoft’s early access programme with approximately 300 users and held around 1,000 premium licences at the start of the year. Ballard emphasised the need for fiscal prudence, stating that every pound spent is a pound belonging to customers. Consequently, the firm was careful to ensure it understood the value proposition before scaling up. Finance was among the first divisions to expand its use of the technology, alongside technology and retail operations. Staff are currently employing Copilot to analyse spreadsheets, review documents, draft emails and summarise meetings. Previously, Nationwide used GPT-4 via Microsoft’s Azure OpenAI service to generate customer letters, a process that reduced the average time required from 45 minutes to between 10 and 15 minutes, with staff reviewing all output before dispatch.

Ballard clarified that the rollout is designed to enhance the productivity of the existing workforce rather than to reduce headcount. The objective is to provide employees with better tools to increase output for customers. The building society is now exploring AI agents for areas such as anti-money laundering, customer due diligence, business analysis and mortgage operations. Nevertheless, Ballard stressed that Nationwide is not yet at the stage of autonomous agents, with human oversight remaining a critical component of all AI use cases. He identified complacency as the primary risk, highlighting the need to detect errors even when the system performs correctly in the vast majority of instances.

To manage these risks, Nationwide has established an AI council comprising technology, security, legal and procurement teams to assess new applications. The firm has also consolidated 19 separate data stores onto Microsoft Azure and Azure Databricks. This expansion occurs as Microsoft seeks to convert growing corporate adoption into returns on its substantial infrastructure spending. Microsoft 365 Copilot has surpassed 30 million paid seats, with enterprise customers holding more than 50,000 seats increasing more than seven-fold year on year. Charles Lamanna, Microsoft’s executive vice president for Copilot, Agents and Platform, described financial services as one of the fastest sectors to adopt the technology. Despite its heavy reliance on Microsoft, Nationwide intends to maintain optionality by evaluating different models for various use cases, adopting a measured approach to investment that avoids chasing every new trend.