Is AI Killing the Billable Hour? The Legal Profession Faces a Reckoning

Artificial intelligence is rapidly changing how lawyers work, raising fundamental questions about the future of billable hours, law firm profitability and the development of junior legal talent.

According to Clio's 2026 UK and Ireland Legal Insights Report, nearly 90% of legal professionals surveyed are now using AI, with almost 80% of AI-adopting firms reporting they can handle more work without increasing resources.

The implications for traditional law firm economics are significant.

A Deloitte survey cited by CNBC suggests senior legal leaders expect the proportion of work billed hourly to decline from 72% to 44% over the next two to three years. Major firms are already adapting. A&O Shearman has collaborated with legal AI company Harvey to automate aspects of loan agreement reviews and regulatory analysis, while Slaughter and May has expanded its use of the technology across practice areas.

However, the disruption extends beyond billing.

Junior lawyers have traditionally developed their skills through document review, legal research and drafting. As AI increasingly performs these tasks, firms face a new challenge: how to develop the next generation of lawyers without removing the foundational experiences that build legal judgement.

The profession may be approaching a turning point where value is measured less by hours worked and more by expertise, strategic thinking and outcomes delivered.

LawUno Insight

AI may not replace lawyers, but it could fundamentally change how their value is measured.

For law firms, the challenge is twofold: developing sustainable pricing models while ensuring junior lawyers still acquire the skills needed to become tomorrow's partners. The firms that successfully balance efficiency, profitability and professional development could emerge as the biggest winners.

The question is no longer whether AI will change legal practice. It is whether the profession's traditional business model can keep up.