For local accountants and lawyers, 2025 was the year AI moved from curiosity to operating cost. AI usage in accounting more than quadrupled in a single year — from 9% to 41% of firms, with 72% of accountants now using AI at least weekly and 35% using it daily [1]. Three-quarters of those regular users report results that exceed expectations, particularly in client service, financial insight and operational efficiency.
The legal market is moving on a similar curve. The share of legal organisations actively integrating generative AI rose from 14% to 26% in twelve months, and 45% of firms now use or plan to use AI as a central part of workflow within a year [2]. Where firms are tracking it, the productivity story is real: 82% of generative AI users in law report increased efficiency [2], and analysis published in 2025 suggests AI could save the US legal industry $20bn annually [3].
Where the value lands
Inside firms, the highest-yield use cases cluster in research, document drafting, document review and summarisation. In legal, generative AI is already widely used for legal research (80%), document review (74%), summarisation (73%) and tax research (69%) [2]. In accounting, the equivalent gains come from auto-categorisation, narrative-from-time-entry and first-draft advisory comms.
Typical investment vs ROI
For an SME firm with 20–100 fee earners, a credible 12-month programme — tooling, integration, change — sits in the £40k–£180k range depending on starting point. The headline ROI driver is not headcount reduction but realisation rate: 5–10 percentage points of reclaimed billable time is achievable from time-capture and drafting alone.
What we’d do first
Don’t buy the model. Buy the workflow change. Start with one fee-earning team, instrument their work, automate the time and narrative, and measure realisation lift before scaling to the next practice area.
References
- Wolters Kluwer, 2025 Future Ready Accountant report — wolterskluwer.com
- Attorney at Work / Thomson Reuters, The AI Adoption Divide Dominates the 2025 Future of Professionals Report — attorneyatwork.com
- 2Civility, AI Usage Could Save US Legal Industry $20 Billion Annually — 2civility.org