British workers are spending nearly £1 billion a year of their own money on generative AI tools used for their jobs, according to new Deloitte research showing employees are adopting artificial intelligence faster than many employers are formally providing it.
Reuters reported that one in six UK workers pays personally for at least one AI tool used at work, bringing their combined annual spending to nearly £1 billion, or about $1.4 billion.
The findings come from Deloitte’s inaugural GenAI Workforce Survey, which covers 25,000 workers across 22 industries, 27 roles and 12 UK regions.
Employees are adopting AI without waiting for employers
Reuters reported that roughly two-thirds of workers surveyed had tried generative AI, including tools such as ChatGPT, Claude, Google Gemini and Microsoft Copilot, while nearly a quarter were using AI daily for work.
More strikingly, 31% said they were using generative AI without their employer’s knowledge—a practice often described as shadow AI—while 17% were personally paying for at least one tool.
Deloitte UK Chief AI Officer Hayley McKelvey said workers were showing that they did not want to wait for permission to use generative AI and were already turning to both free services and personally funded premium versions.
That makes workplace AI adoption partly an employee-led technology rollout rather than a conventional enterprise deployment.
AI is saving time, but much of the use remains basic
The survey found that the most common workplace uses were searching for information, drafting emails and producing summaries, with workers reporting average time savings of around 70 minutes per week.
Deloitte partner Paul Lee said generative AI had quickly become part of everyday working life, but much usage remained concentrated on relatively basic tasks instead of more complex work.
That distinction matters because employees may see enough immediate value to pay for AI themselves even before organizations have redesigned jobs or workflows around the technology.
Deloitte’s separate 2026 Human Capital Trends research found that 44% of UK workers had used AI to automate part of their job, often without their employer’s knowledge.
Shadow AI creates a governance gap
For employers, the Human Impact story is not simply that employees like AI enough to buy subscriptions.
Personally funded tools can sit outside company procurement, access controls, security reviews and data-retention policies. Workers may therefore be introducing external software into workflows before security and IT teams know those tools are being used.
Deloitte says organizations need to move beyond simply providing access and instead give workers appropriate guardrails, purpose and support for using the technology.
The £1 billion figure exposes an unusual workplace technology shift: employees are effectively financing part of their employers’ AI adoption themselves.
For technology leaders, that suggests AI implementation is no longer only a top-down transformation programme. Workers are already choosing the tools they believe make them more productive—and enterprise policy is struggling to catch up.
