You can practically sense the year these businesses have just had when you stroll through the City of London on a weekday evening. Canary Wharf’s lifts are packed after nine o’clock. Bishopsgate’s conference rooms are illuminated until midnight. The figures came in better than anyone dared to predict in a year when the majority of the British economy appeared to have wandered into a fog, so somewhere in a partner’s corner office, a bottle of something pricey is being quietly uncorked.
The figure in the headline is impressive. Profit per equity partner surpassed £2.1 million, partnership profits increased by 11%, and Clifford Chance’s revenue increased by 9%. With a record-breaking £2.3 billion, Linklaters matched the mood. For the first time, Ashurst broke the £1 billion mark. Almost overnight, A&O Shearman—a transatlantic stitching-together that lawyers discussed endlessly over coffee—became a £2.9 billion firm. It’s difficult to ignore the fact that the legal elite was increasing their portion of the pie while small businesses throughout the UK were tightening their belts.
| Snapshot: UK Big Law in 2025 | Details |
|---|---|
| Sector | Legal services, headquartered largely in London |
| Collective UK Revenue (2025) | Over £52 billion |
| Standout Performer | Clifford Chance — 9% revenue growth to £2.4 billion |
| Largest Magic Circle Firm | Linklaters — record £2.3 billion revenue, PEP £2.2m |
| Most Aggressive US Entrant | Kirkland & Ellis — surpassed $1 trillion in announced global M&A |
| New Cross-Border Giant | A&O Shearman — £2.9 billion combined |
| Top NQ Salary at US Firms in London | £200,000 |
| Partner Hires in London (2025) | 668, a 21% jump from 2024 |
| Legal Services Price Inflation (Q4 2025) | 6.7%, per the Legal MBA tracker |
| Firms Reporting Profit Increases | 84% of the top 100, up from 56% the year before |
Deals returned, which is the main cause. London, which continues to be the ideal hub for the convergence of European complexity and New York money, caught the wave as private equity rekindled its appetite. Globally, Kirkland & Ellis has announced M&A worth over a trillion dollars—a sum so enormous it’s practically unthinkable. After restructuring in 2023, Magic Circle partners returned to cross-border buyouts and listings in 2025. Even the attorneys in charge of it seemed taken aback by the rebound.
However, the true tale is a little more nuanced. The quiet, unrelenting rise in billing rates drove the 9% growth. The average increase in worked rates was 7.3%, a level not seen since 2008, a year that no one in this industry wants to bring up without feeling a little uneasy.
Customers agreed to the increases, in part due to habit and in part because no chief executive wants to take a chance on less expensive legal representation during a year of political unpredictability and trade-war anxiety. People are drawn to trusted attorneys by instinct, even if those attorneys are charging exorbitant fees.
The rest was done by the talent war. In 2025, London firms hired 668 partners, a 21% increase, while US firms continued to lead the bidding. Today, newly qualified salaries at American companies in the City are £200,000, which ten years ago would have seemed ridiculous. Magic Circle companies rushed to compete. Raising rates more quickly than costs and hoping for realization is what one senior partner referred to as the “impossible equation” when describing the dynamic to colleagues. The long-term validity of that equation is still unknown.
Beneath the festivities are cautions. Write-offs are increasing. Nearly 90% of businesses reported that they are writing off more work than they used to, and for half of them, outdated work-in-progress is now their biggest cash-flow concern. The spreadsheet may show healthy revenue, but the difference between what is billed and what is collected is growing. As businesses make significant investments in AI, more astute and cost-conscious clients are resisting rate increases and logically questioning why the efficiency improvements aren’t being reflected in their bills.
As you watch this play out, you get the impression that Big Law just had its most vulnerable and boisterous year in a long time. The champagne is authentic. The fissures behind the wall are as well.