UK management consultancy: the global arms book the billions, the mid-market keeps the margin

The 778 UK management consultancy companies that publish a full profit-and-loss book £30.9bn of combined turnover — and the money and the margin live at opposite ends of the table. Accenture’s UK company turned over £3.71bn and kept £135.7M before tax, a 3.7% margin; AlixPartners books its whole European-and-international group through a UK-registered company that shows a −£59.5M group loss — even as UK revenue itself fell about 5%. Meanwhile a tier of mid-market specialists a fortieth of Accenture’s size — Alvarez & Marsal’s UK tax arm (40.5%), Delivery Associates (31.2%), XPS Pensions Consulting (28.1%) — quietly converts a quarter to two-fifths of every fee into profit. The median pre-tax margin across the whole set is about 6%; almost nobody actually earns 6%. This is a market of thin-looking global arms, fat specialist boutiques, and a long shelf of companies that aren’t really consultancies at all. Figures are approximate — verify against a company’s own accounts before relying on any single number.

Read the names first

Three things change how you read every number below.

A lot of the shelf isn’t consulting. The consultancy label is one of the most casually adopted in British company registration, and the giants list shows it: Umbrella-Company Limited (£457.9M through 56 staff) is a contractor payroll umbrella — its “turnover” is other people’s wages passing through; Neuven Solutions (£672.4M at a 0.4% margin) is a neutral-vendor platform routing agency spend, the same pass-through economics we mapped in temp staffing; First Merchant Processing is a card-payments processor; MJT Securities (£359.2M) is a family-owned Essex motor, leasing and property group. None of them sells advice. We’ve also excluded one apparent giant from the table entirely: a construction cost consultancy whose accounts show £1.92bn of turnover against 36 staff — £53M per head is the footprint of managed construction spend or a reporting error, not fee income, so we don’t repeat the number as if it were a consulting business.

Captives book “margin” nobody earned in a market. Reckitt Benckiser Corporate Services shows £378.1M of profit on £1.07bn — it is the consumer-goods group’s internal services vehicle, and its economics are set by intercompany recharges, not clients. It stays in the table as a labelled exhibit, and out of every competitive read.

A UK entity is a window, not the firm. The global consultancies trade here through UK companies whose margins are shaped by group charges flowing in both directions: Accenture’s 3.7% and AlixPartners’ outright loss say as much about transfer pricing and group structure as about client work, while Aon’s UK pensions-consulting arm shows a 48.6% margin — boosted by £54M of other gains, and even its 32% operating margin is above anything earned at arm’s length. PA Consulting Services reports no employees of its own — its thousands of consultants are employed elsewhere in the group. And several household names — the strategy houses and Big Four advisory practices that trade as partnerships or overseas entities — don’t appear in this set at all. Never compare a global arm’s UK-entity margin with an independent’s real one.

The giants

Strip out the captive, the payroll vehicle, the payments processor, the spend platform and the conglomerate, and the real consulting giants tell one story each. Accenture is defending margin — revenue up 9%, headcount down 1%, the classic post-boom consulting posture. AtkinsRéalis is the healthiest large operator on the shelf: £1.42bn at a 10.4% margin while hiring 11%. PA Consulting holds a low-20s pre-tax margin on flat revenue — high-teens at operating level, since interest and R&D-credit income sit inside the pre-tax figure — still the best large-scale pure-consulting economics visible here. And AlixPartners needs the sharpest relabelling of all: the UK-registered company is the firm’s consolidated European-and-international group, so the 33% growth belongs to Continental Europe and the rest of the world — UK revenue actually fell about 5% — and the £59.5M is a group loss booked through the UK company, driven by share-based partner compensation, associate losses and parent-loan interest rather than UK day rates.

The shape of the market

The healthy heart of UK consulting is the mid-market. The £5–25M band is the biggest single population — 303 firms, 73% profitable — and profitability rises with scale to 79% at £25–100M. The graveyard is at the bottom: barely 40% of the sub-£1M firms that publish full accounts make money, the price of a business model with no assets, no lock-in and one or two fee-earners.

Where the money is: advice bolted to an obligation

Screen the £5–100M tier for profitable operators at a double-digit margin and a pattern emerges immediately: the fattest margins belong to advice a client is more or less obliged to take. Tax structuring (Alvarez & Marsal Taxand UK, 40.5%), pensions (XPS Pensions Consulting, 28.1%), R&D-relief claims (Leyton UK, 26.8%) and employment-law compliance (Croner Group, 24.8%) all monetise a statutory or fiscal necessity. One caveat on the fattest number: most of A&M Taxand’s profit is allocated to non-controlling partner interests — part of that 40.5% is really partner pay, so it isn’t comparable with firms that salary their partners. Generalist transformation consulting — the thing most people picture when they hear the word — clusters at 11–16%, and several of its best names are shrinking.

The automatic screen also surfaces Equitix at a 46.6% margin — an infrastructure fund manager whose economics are fund fees and carried interest, not consulting, so it’s excluded from the read — and North Highland’s holding company, a duplicate of the operating company above. A handful of harder-to-classify operators at 10–14% round out the tier.

The trajectory column carries the cyclical story: the generalist transformation names — North Highland, Credera, Creative Lynx — are the ones shrinking, while the obligation-driven advisers grow. When discretionary change budgets get cut, the tax deadline and the pension scheme don’t move. The BCG UK company sits out of that read entirely: its revenue more than doubled through arm’s-length allocations of the firm’s global profits while pre-tax profit fell, and the entity doubles as an intermediate holding company — its line says nothing about UK strategy-consulting demand in either direction.

Growth, read with care

Ranked by raw growth this category is a hall of mirrors. The top three “growers” aren’t consulting growth at all: Murray & Roberts UK (+52,208% at a 95.9% “margin”) is the UK investment-holding arm of a South African engineering group whose parent entered business rescue in 2024 — its “revenue” is dividends from mining subsidiaries, not fees — and Ceriter Investments 2 and Resurgam Capital Management (64.9% margin) are investment vehicles whose revenue is investment income. First Merchant Processing’s +870% is a payments business ramping. The believable consulting-adjacent signal is growth backed by hiring: ResultsCX UK (+341% turnover, +253% staff — a customer-experience outsourcer scaling a real operation) and Ixxov (+249%, +600% staff, at a 24% margin). Kinmont (+306% with staff down 10%) is what an M&A boutique looks like the year the deals land — fee lumpiness, not expansion.

Market structure

Consulting is moderately concentrated at the top — the top five carry 28.7% of the £30.9bn, the top 100 carry 74.3% — but the true consulting concentration is lower than the curve suggests, because several of the biggest entities on it (the captive, the payroll umbrella, the spend platform, the conglomerate) aren’t competing for consulting work at all. Below the top 100 stretches one of the longest tails we’ve mapped: hundreds of firms under £25M, in a business where two credible partners and a client list is a viable company.

Ownership and vintage

Roughly 20% of these firms (155) carry a Holdings/Group/Bidco/Topco-style name — the structural fingerprint of a private-equity buyout or a planned exit, and a high share for a sector whose only assets go home at night. It fits the margin map: the obligation-driven advisers with 25–40% margins and recurring, compliance-anchored revenue are exactly what buy-and-build capital wants, and several names in the best-run table sit inside larger advisory groups today.

The vintage profile is the opposite of road freight’s: only 61 of 778 firms pre-date 1990, and every cohort since 2000 is well populated. Consulting has no fleets, licences or freeholds to inherit — a new firm is founded every time a partner group walks out of an old one, which is why the 2000s (219 firms) and 2010–15 (192) cohorts dominate and why longevity confers reputation but little structural protection.

What the map shows

1. The billions and the margin live in different places. Accenture’s UK company books £3.71bn at 3.7%; specialist advisers at 1/40th the size run 25–40%.
2. A global arm’s UK margin is a group-structure artefact, not a performance read. AlixPartners’ UK-registered company booked a £59.5M loss that belongs to its whole European group — UK revenue itself fell about 5%; Aon’s pensions arm shows 48.6%, boosted by £54M of other gains. Neither number describes client economics.
3. Advice bolted to an obligation beats advice a client can defer. Tax, pensions, employment law and R&D relief run 25–40% margins and hold through the cycle; generalist transformation clusters at 11–16% and its best names are shrinking.
4. A large share of the shelf isn’t consulting. Payroll umbrellas, payments processors, captive group-service vehicles and a family motor group sit among the “giants” — blend them in and the ~6% median margin describes nothing real.
5. The mid-market is the healthy heart — 303 firms at £5–25M, 73% profitable, rising to 79% in the £25–100M band; the sub-£1M tier is only 40% profitable.
6. Consolidation is well underway — one in five firms carries a holdco-style name, and the high-margin compliance-anchored specialists are the natural targets.

Methodology and caveats

This covers only the 778 UK management consultancy companies that publish a full profit-and-loss, out of roughly 7,300 registered in the category — the thousands of one- and two-person consultancies filing small-company accounts are invisible here, and several household-name firms that trade as partnerships or overseas entities don’t appear at all. UK entities of global firms show that entity’s accounts, not the group’s, and intercompany charges can move their margins in either direction. Business-type labels are directional, drawn from names and public descriptions; obvious non-consulting entities (investment vehicles, payroll umbrellas, captives) are labelled and kept out of competitive reads, and one apparent £1.9bn giant is excluded where the number looks like managed spend rather than fee income. Extreme proportional outliers are excluded from the charts. Figures are approximate — this is analysis, not financial advice; verify any specific figure against a company’s own accounts.