Last reviewed by: Lee Thomas, Managing Director, Crescat Digital — 24 July 2026
Every marketing budget starts as a number someone must defend. A managing partner asks how you arrived at it. A finance director wants to know why it has gone up. And for most firms the honest answer is some mix of last year’s figure, a percentage read in a survey, and a guess.
That is a weak position to argue from, and it usually produces one of two mistakes: spending too little to be found at all, or spreading money across channels that were never going to work for the kind of law you practise. Neither is a budgeting decision. Both are what happens when there isn’t one.
This article does the opposite of handing you an average to copy. It shows you how to build a marketing budget from your own numbers, one you can take into a partners’ meeting and justify line by line, and what the firms outgrowing their competitors do differently with the money once they have it.
The UK data on what law firms spend is thinner than the benchmark tables online suggest, and we will be straight about what it can and cannot tell you. Used well, those figures are a sanity check. Copied blindly, they are how firms end up with the wrong budget and no way to explain it.
Key takeaways
- There is no universal “right” marketing budget. UK law firms spend roughly 1% of fee income (the largest firms) to around 3% of turnover (smaller, marketing-active firms), and that spread reflects size and strategy, not a target to hit.
- The averages are pulled around more by who is counted than by firm size: most firms spend under 1% of income, while the firms that actively market spend nearer 3%. A benchmark copied from a firm unlike yours will mislead you.
- High-growth firms differ less in how much they spend than in how they allocate it. They fund fewer channels properly and measure by enquiries and matters, not activity.
- The “45% SEO / 30% PPC / 15% traditional / 10% social” split circulating online is a recycled template, not evidence. No UK survey supports it.
- A budget you can defend is built from the bottom up: start from fee income, set a percentage band for your size and ambition, then allocate by what each channel costs and returns for your practice areas.
Table of contents
- How much do UK law firms actually spend on marketing?
- Why copying a benchmark percentage will cost you
- How to set your firm’s budget in five steps
- Allocating your budget across practice areas
- What high-growth firms do differently
- Building and defending your 2026 budget
1. How much do UK law firms actually spend on marketing?
Somewhere between 1% and 3% of income. But the range matters far more than any single number inside it, because where a firm lands depends less on its size than on whether it markets actively at all, and on how the spending is counted.
Three UK sources set the boundaries, and they don’t agree. Fee income (the money a firm bills for legal work, before costs) is the figure marketing spend is measured against in each.
The largest firms spend the least, proportionally. The PwC Annual Law Firm Survey, which covers the top 100 UK firms, puts marketing and business development at 1.0% of fee income for the top ten firms, rising to 1.9% for firms ranked 51 to 100 (2025 survey). Those figures appear to be reported separately from in-house marketing salaries, which sit under staff costs elsewhere in the accounts.
Smaller and mid-sized firms spend more. The Professional Services Marketing Survey, which samples marketing-active firms further down the market, reports law firms spending around 3.0% of turnover, up from 2.7%, also excluding salaries. A £10m-turnover firm on that basis invests roughly £300,000 a year.
And the most representative sample lands lower than either. The Law Society’s Financial Benchmarking Survey, produced by Hazlewoods across 145 firms in England and Wales, reports a median of just 0.9% of fee income (rising to around 1.3% at firms turning over more than £10m), and this figure includes in-house marketing salaries, which the other two exclude. It sits low because its sample is broad and representative rather than skewed toward firms that market actively.
| Firm type | Marketing & BD spend | What’s counted | Source |
|---|---|---|---|
| Largest firms (top 100) | ~1.0%–1.9% of fee income | salaries reported separately | PwC Annual Law Firm Survey 2025 |
| Smaller, marketing-active firms | ~3.0% of turnover | excludes in-house salaries | Professional Services Marketing Survey 2025 |
| Representative median (all sizes) | ~0.9% of fee income | includes marketing salaries | Law Society Financial Benchmarking Survey 2025 |
Indicative figures, drawn from named UK surveys with different samples and definitions. They are not directly comparable — which is the point.
Two things drive the spread. The first is who is in the sample. The representative median, across firms of every size, is under 1%, because most firms spend very little on marketing; the 3% figure comes from a survey of firms that have chosen to invest in it, so it reflects the committed end of the market rather than the middle. The second is how the spending is counted: whether your in-house marketing salaries sit in the marketing line or under staff costs changes the number before any comparison. Among the very largest firms there is a size effect on top of this, with the top ten spending a smaller share than firms ranked 51 to 100, because their scale and relationships do more of the work.
So which figure applies to you? If you run a large, established firm with a strong referral base, the lower end, around 1% to 2%, is a realistic starting point, and the real question is whether you are investing enough to defend a position competitors are spending to take. If you are trying to grow, or competing for work in a busy practice area, the committed end of the market, around 3%, is the more useful reference, because visibility must be bought before it compounds. The representative median sits under 1%, but that reflects a market full of firms coasting on referral, not a target to match. For a wider frame, marketing budgets across all industries average around 7.7% of revenue (Gartner’s 2025 survey of chief marketing officers), several times what even the more active law firms spend, so a firm that markets deliberately stands out in its sector quickly.
This is why a single “law firms spend X% of revenue” figure is close to useless as a target. It tells you nothing until you know which firms are in the average and what they counted. For a broader view of how the channels themselves are shifting in 2026, our 2026 digital marketing playbook for UK law firms sets the wider context; this piece is about turning that landscape into a number.
2. Why copying a benchmark percentage will cost you
An average is a poor instruction. Two firms of the same size, one a referral-led corporate practice and the other a growing personal injury firm chasing new enquiries, should spend very differently, and any percentage that fits both fits neither well.
The problem gets worse when the “benchmark” isn’t real. The split you will see quoted most often (45% to SEO, 30% to PPC, 15% to traditional, 10% to social) turns up on marketing sites in several countries with no survey or dataset behind it. It is a template that got copied until it looked like a fact. Building a budget on it means inheriting someone else’s guess about a market that may look nothing like yours.
A benchmark is still useful, but only in one direction. It is a floor and a sanity check: a way to notice that you are spending a tenth of what comparable firms spend, or three times as much, and to ask why. It is not a number to land on.
How to read a marketing benchmark
Treat any spend figure as a range to be interrogated, not a target to hit. Ask three things before you use it: which firms are in the sample, whether it includes in-house salaries, and how close those firms are to yours in size and practice mix. If you can’t answer all three, the number is context, not guidance.
3. How to set your firm’s budget in five steps
A budget you can defend is built from the bottom up, not copied from the top down. Five steps get you there, and each one gives you something to say when a partner asks how you arrived at the figure.
Step one: start from fee income, not last year’s budget. Last year’s number carries forward last year’s mistakes. Your fee income, actual or forecast, is the figure everything else scales from, and it is the one number in the room nobody will argue with.
Step two: set a percentage band for your size and ambition. Use the ranges in Section 1 as a starting point — roughly 1% to 2% is typical for larger, established firms, closer to 3% for smaller firms that need to be found. Then adjust. Move up if you are trying to grow, entering a new practice area, or starting from low visibility. Move down if you have a strong referral base doing much of the work. The band, not a single figure, is the honest starting position.
Step three: turn the band into a pound figure, and check it against a floor. Convert the percentage to money, then test it against the minimum viable spend — the least you can put into a channel and still expect it to work. A budget spread so thin that no single channel is funded properly is worse than a smaller budget aimed at one or two things. If the number fails that test, it is too low, and that is a finding worth taking to the partners.
Step four: allocate by what each channel costs and returns for your practice areas. Not by a template. The right split depends on the work you do and how your clients find you, and our guide to where to put your next £100k works through that allocation in depth; the next section applies it to each practice area.
Step five: set a review cadence and reallocate. A budget is a hypothesis about what will work, and a hypothesis needs testing. A 90-day review turns marketing spend from an annual leap of faith into a managed investment you adjust as evidence arrives. Our guide to what a serious 90-day pilot looks like sets out how to structure that review so it produces decisions, not just reports.
Put together, the five steps produce a number with a paper trail. Take a firm billing £4m a year, mostly employment and family work, that wants to grow. Step one fixes the anchor at £4m of fee income. Step two sets the band: a smaller firm with growth ambition sits at the upper end, so 2.5% to 3% rather than 1%. Step three turns that into roughly £100,000 to £120,000 a year, and a quick check confirms it clears the floor, with enough to fund two channels properly rather than dabble in five. Step four allocates by the work: employment and family are research-heavy, informational areas, so the split leans towards SEO and content, with a smaller PPC budget held back for urgent, high-intent searches and a modest amount for local visibility. Step five sets a review at 90 days, where the firm looks at which practice area produced enquiries and moves budget towards it. Not one of those figures is copied from a survey. Every one traces to the firm’s own income, size, ambition and caseload, which is exactly what makes the total defensible when a partner asks.
The five-step model turns your fee income into a budget you can defend, with a 90-day review loop that keeps it honest.
We have built these five steps into a free spreadsheet you can use straight away.
Download the law firm marketing budget model
Enter your fee income and practice-area mix, and the model returns a suggested budget range, a starting channel allocation you can adjust, and the questions to pressure-test it before you present it. Free, no call required, and it works offline.
4. Allocating your budget across practice areas
Where the money should go depends on the work. A conveyancing firm and a clinical negligence firm are buying completely different things when they buy marketing, and a split that suits one will waste money for the other.
No UK survey breaks marketing spend down by practice area. The reasoning below is built from two things we can see clearly, what it costs to reach a client in each area and how that client actually chooses a firm, rather than from reported spend that doesn’t exist. Treat it as reasoning you can follow and check, not a figure to copy.
As a starting point, most firms’ digital budgets land around 35% to 55% on SEO, 15% to 35% on PPC, and 5% to 15% on AI visibility (being surfaced in AI-generated answers such as Google’s AI Overviews and ChatGPT), with content and local search woven through both. Those are the ranges we use across the series. Unlike the fixed template in Section 2, these are ranges that move with your practice mix, and here is how they move.
Personal injury and clinical negligence. High case values justify expensive paid search, and it is expensive: cost-per-click (what you pay each time someone clicks your ad) for competitive personal injury terms runs well above the general legal average of around £8, commonly £25 to £50 and higher for the most competitive keywords, on aggregated UK agency estimates. SEO and AI visibility matter just as much, because these clients research their situation (“what am I entitled to after an accident”) long before they choose a firm. This is a practice area that can carry a higher PPC share than most.
Employment law. Strong informational demand from people trying to understand their rights makes SEO and content the primary channels. PPC works for urgent, high-intent searches such as “unfair dismissal solicitor,” but the volumes are lower and the split should lean organic.
Family law. An emotional, research-heavy journey where clients read widely before making contact. Content and SEO lead; PPC has a role for urgent needs; and brand and trust signals matter more here than in almost any other area, because the decision is as much about confidence as capability.
Corporate and commercial. Largely referral- and relationship-led, with a long buying cycle. SEO keeps the firm visible and content builds credibility during a decision that can take months, but PPC is rarely the primary channel. This is where broad-market spend delivers least and reputation delivers most.
Conveyancing. Price-competitive and high-volume, which makes local SEO and PPC the workhorses and margin discipline essential — at roughly £8 a click for general legal terms, every enquiry must convert efficiently for the numbers to work.
| Practice area | SEO | PPC | Content | AI visibility | Local | Brand/social |
|---|---|---|---|---|---|---|
| Personal injury / clin. neg. | Primary | Primary | Supporting | Primary | Supporting | Limited |
| Employment | Primary | Supporting | Primary | Supporting | Limited | Limited |
| Family | Primary | Supporting | Primary | Supporting | Supporting | Supporting |
| Corporate / commercial | Primary | Limited | Primary | Supporting | Limited | Supporting |
| Conveyancing | Primary | Primary | Limited | Limited | Primary | Limited |
Channel roles reflect buyer journey and channel economics, not reported spend. Adjust for your firm’s starting position and local competition.
Two adjustments sit on top of all of this. Local competition raises the cost of paid search in crowded city markets, which pushes the sensible split further towards SEO and content, where you are not bidding against every rival for the same click. And a firm starting from low visibility must over-invest in the compounding channels for a while before they carry their weight. The matrix is a starting shape, not a fixed allocation, and the budget model lets you set it against your own figures rather than ours.
The figures for cost-per-click above are compiled from UK agency data and are best read as estimates. Many “UK legal” advertising costs quoted online are US figures with the dollar sign swapped for a pound. If you see a legal cost-per-lead of £131 or a personal injury click at hundreds of pounds, you are almost certainly looking at American data, where legal advertising costs several times what it does here. For how AI-generated answers are increasingly the first place these clients form an impression, see our piece on how AI search decides which firms to surface.
5. What high-growth firms do differently
The firms that grow fastest differ less in the exact percentage they spend than in four habits. None of these is expensive to adopt. All of them are about discipline rather than budget.
They treat marketing as an investment, not a cost. Growth firms sustain their spending instead of cutting it the moment a quarter looks flat. Analysis by Peter Field, a leading figure in UK marketing-effectiveness research, drawing on advertising case studies through past recessions, consistently finds that firms which sustain their marketing while competitors retreat come out stronger. The pattern shows up in professional services specifically: Hinge’s 2026 High Growth Study of nearly 500 professional-services firms found that the fastest-growing firms invest a markedly higher share of revenue in marketing than the no-growth firms do. Copy the refusal to cut, not the percentage. The appetite is there even among cautious smaller firms: in LexisNexis’s 2025 Bellwether survey of UK practices, 16% had increased their marketing spend over the year and a further third planned to.
They fund fewer things properly. A budget spread evenly across every available channel usually funds none of them above the level where they start to work. Growth firms concentrate on the channels that suit their practice areas and back them past that threshold, rather than buying a little of everything. Spending enough to matter in two channels beats a token presence in six. The discipline is as much about what you decline to fund this year as what you back, and that restraint is often what separates a budget that brings in new work from one that merely maintains a presence.
They fund the channels that compound first. Paid advertising is a tap: enquiries flow while you pay and stop the day you don’t. SEO and content are different: they build an asset that keeps returning long after the work is done, an effect known as compounding. HubSpot’s analysis of its own content found that a small share of compounding articles generated a disproportionate share of all traffic, years after publication. Growth firms weight their budget toward that compounding effect once a baseline is in place, accepting a slower start for a lower long-term cost of enquiries. As our guide to realistic SEO timelines shows, the early flat months are the work that makes everything afterwards possible.
They measure by enquiries and matters, not activity. Impressions, clicks and posts published are not returns. The same Hinge research found high-growth firms far more likely to track outcomes, the enquiries and instructions marketing actually produced, than firms that had stalled. Measuring outcomes changes where the money goes. A firm that knows which practice area and which channel produced last quarter’s instructions can move the next quarter’s budget towards it, while a firm counting clicks is guessing. What gets measured badly gets funded badly, which is often how money ends up in content that quietly wastes budget; our piece on the hidden risks in law firm content covers where that leak tends to hide.
| Firms that grow | Firms that stall | |
|---|---|---|
| When a quarter dips | Hold the budget, review the tactics | Cut the budget |
| Channel choice | Fund two or three past the threshold | A little of everything |
| SEO and content | An asset to build | A cost to trim first |
| Measured by | Enquiries and matters | Clicks and activity |
6. Building and defending your 2026 budget
A derived number is a defensible number. When a partner asks how you arrived at the figure, you can walk them back through it: this is our fee income, this is the percentage band for a firm our size and ambition, this is how it splits across the channels our practice areas need, and this is the point in 90 days where we will review it and move money toward what is working.
That is a different conversation from “the survey said 3%.” It reframes marketing from a cost the partners tolerate to an investment they can see the logic of, which is the only framing that survives a tight year. Set the review date when you set the budget, so the next meeting is about evidence rather than instinct.
One resourcing decision sits alongside the number: whether to build the capability in-house or bring in an agency. That is a genuine trade-off of cost, control and risk, and we have set it out in full in our total cost comparison of in-house versus a specialist agency. Whichever way it goes, the budget model gives you the figure to plan around.
Review your budget with someone senior
Book a free 30-minute call to go through the numbers the model produced for your firm. You will speak to someone senior, not a salesperson, who will sense-check the figure against your size and practice areas and give you a view on which channels to fund first for the next 90 days. No obligation.
Frequently asked questions
How much should a UK law firm spend on marketing in 2026?
Roughly 1% to 3% of income, depending on how you count it and whether the firm markets actively. The largest firms spend around 1% to 2%, firms that actively market nearer 3%, and the representative median across all firms sits under 1%, because most firms spend very little. Treat these as a starting range to adjust for your firm, not a figure to copy.
What percentage of revenue should a law firm spend on marketing?
There is no single correct percentage. Use your firm’s size band as a starting point, lower for large, referral-led firms and higher for smaller firms that need visibility, then adjust up for growth ambition or a weak starting position, and down for a strong referral base. The right number is the one you can justify from your own position, not an average.
How should a small law firm allocate its marketing budget?
Concentrate rather than spread. A small budget divided across every channel funds none of them properly. Identify the one or two channels that suit your practice areas (usually SEO and content for informational work, local SEO and PPC for high-volume or price-competitive work) and fund those past the point where they start to work before adding anything else.
Should a law firm spend more on SEO or PPC?
It depends on your practice area and time horizon. PPC delivers enquiries quickly but stops when you stop paying. SEO takes months to build but compounds and lowers your long-term cost per enquiry. High-value areas such as personal injury can justify significant PPC spend; informational areas such as employment and family law usually reward SEO and content more.
How do I justify the marketing budget to the partners?
Build it from fee income rather than last year’s figure, so every number traces to something the partnership already accepts. Show the percentage band for your firm’s size, the allocation logic by practice area, and a 90-day review point. A budget you can walk through step by step is far easier to defend than a percentage lifted from a survey.
Do the “law firms spend X% of revenue” benchmarks online actually apply to my firm?
Rarely without adjustment. Most published benchmarks either average across firms very different from yours or, in the worst cases, relabel US figures as UK. Use them to sanity-check that you are not wildly over- or under-spending, then set your own number from your fee income, size and practice mix.
Sources
- PwC, Annual Law Firm Survey 2025 — marketing and business development spend as a percentage of fee income, by firm-size band.
- Law Firm Marketing Club / Sursum, Professional Services Marketing Survey 2025 — law firm marketing and BD spend as a percentage of turnover.
- The Law Society of England and Wales / Hazlewoods, Financial Benchmarking Survey 2025 — marketing expenditure as a percentage of fee income including staff costs (Figure 6.11; 0.9% median).
- LexisNexis, Bellwether Report 2025 — UK small-firm marketing spend sentiment.
- Hinge Research Institute, 2026 High Growth Study — marketing investment and measurement among high-growth professional-services firms.
- HubSpot Research — compounding blog content and its share of total traffic.
- Gartner, 2025 CMO Spend Survey — marketing budget as a percentage of company revenue (cross-industry context).
- IPA / Peter Field — advertising effectiveness and marketing investment through downturns.
