UK Law Firm Pricing Briefing - April 2026

Yes, it is May... but the ONS release was dated April based on data to 31 March. So at this point, I think pick a month you like the look of :)

Broadly it looks like input inflation for law firms is around 2.5-3.0% with increased inflationary risks in the second half of 2026 and output inflation (legal prices) stabilising at around 6%.

However, predicting where prices are going from here is unusually fraught - up if we see an inflation shock from the Iran war? Down if we see clients exercising pricing power around AI and demanding discounts?

As ever, I would note that there isn't a single 'legal market' at work here, this analysis is the aggregation of a number of disparate markets with quite different pricing characteristics.

Input Inflation of 2.5-3.0%

Aggregate Services are a good proxy for general input inflation within UK law firms (non-pay expenditure) and, although there is some lumpiness in the quarterly index over the past year, it does appear be settling in a range of 2.5-3.0%, notably down from the highs of 5-6% through 2022 and 2023:

Aggregate Services Inflation heading down to 2.5-3.0%

My hesitancy in believing input inflation has now settled lies in the (lack of) the Iran war in these figures. The war started at the end of February and so (a) the ONS data only includes one full post-conflict month to 31 March and (b) whilst oil prices have increased from ~$40 a barrel to north of $100 there is a further time delay before we start seeing the second and third order effects of that in services pricing - law firms don't tend to buy high volumes of oil based/plastic goods.

I anticipate the Q2 figures being fairly benign when they're released in July, but I would expect firms to be experiencing greater input inflation in the second half of the year.

Worth preparing for H2 now.

Output Inflation of ~6%

Whereas Aggregate Services has cooled from 5-6% by around half to ~3%, Legal Services inflation (the prices firms are charging their clients) has fluctuated around ~6% over the past few years:

Legal Services Price Inflation Stabilising at 6%

Those quarterly readings have been quite volatile (high of 10% 2023 Q3, low of 4.6% 2024 Q4), which does make establishing an underlying trend tricky, but the ups and downs have become less extreme in more recent quarters.

So 6% inflation as a basecase at the start of the FY2025/27 financial year is probably reasonable, noting that is based on actual prices not standard rates. So grossed up at, say, a 75% realisation rate implies standard rate increases of ~8% on last year.

AI and Iran

Whilst the fluctuations around 6% have got smaller over time, looking forward I think we can (unhelpfully) make the case for sharp moves up or down in the index.

The ONS sampling methodology skews towards medium and larger corporate buyers of legal services, and I'm seeing examples of those types of buyers pushing harder on legal spend under the pretext of AI discounts/assumed AI savings.

Law firms have made a rod for their own backs in recent years by (over) emphasising efficiency savings when using AI within the firm. 2026 could be the year clients demand firms put their money where their mouth is.

But, as with input inflation above, we've not yet seen the second and third order inflationary effects of the Iran war come through and, in the absence of a timely resolution to the conflict, we could be looking at an inflationary shock throughout supply chains.

Firms will need to keep a careful eye on both input and output inflation, many have now invested in commercial finance/FP&A/pricing/procurement teams having been burnt by the post-Covid inflationary spike, and so hopefully are well placed to do so.

Ultimately, I can see clients experiencing broad input inflation and will use law firm's own narrative around AI efficiencies as a stick to beat them with, in order to manage spend in this category.

In Practice, and in Conclusion

Whilst the headline might be input inflation is 3%, output inflation is 6%, let the good times roll - beneath that, the inflationary environment is likely to be much more difficult to navigate in the second half of 2026 than the first.

Whilst there is certainly a role for centralised teams (procurement, pricing etc) to play in navigating this environment, most pricing decisions are being made in individual conversations between partners and their clients.

Getting the balance right, between centrally managed rate cards and panels, and partner-led pricing negotiations, is shaping up to be the defining commercial challenge of the next 12 months.

UK Law FIrm Pricing Briefing - April 2026