UK IT services: revenue up, headcount down — the giants are squeezing more out of fewer people

About 1,959 UK IT-services companies publish a full profit-and-loss, booking £157.8bn of combined turnover between them — and the year’s defining pattern sits right at the top of the table. Every one of the twelve largest grew revenue; seven of them cut staff while doing it. Microsoft’s UK arm added 13% to revenue on 6% fewer people, Salesforce UK 11% on 10% fewer, Cisco International and Cognizant the same shape at smaller amplitude. In an industry that ultimately sells people’s time, sales up and people down is either a productivity story or a squeeze — and either way it is the number to watch. Figures are approximate — verify against a company’s own accounts before relying on any single number.

Two caveats before any number means anything

First, the label shelters impostors. “IT services” is where companies end up when their main activity is hard to name, and the giants table shows it: Revolut (the banking-and-payments group’s main operating company, £1.45bn of pre-tax profit), XTX Markets Technologies (the technology entity of an algorithmic trading firm — £3.02bn of revenue from 127 people), Sony Interactive Entertainment (PlayStation), Midasplayer (King, the maker of Candy Crush) and TikTok’s UK entity all sit in it. They are real companies with real accounts, but they tell you nothing about IT services, and we exclude them from every competitive read below.

Second, the £158bn is not UK IT spend. Several of the biggest entities are global booking hubs: Cognizant Worldwide runs £11.6bn of revenue through 6,863 UK-listed staff — roughly £1.7M per head, against Capgemini UK’s £184k. Nobody bills consultants at £1.7M a head; the revenue is contracted here and delivered by group companies elsewhere. Revenue per head is the honest diagnostic throughout this report: a genuine consultancy runs £100–200k per head, a sales-or-booking hub runs £1M-plus. And the reverse distortion applies too — several household-name consultancies describe their main business in ways that put them in neighbouring categories (management consulting, software), so they don’t appear here at all.

The giants: everyone grew, most shrank

…and 11 more above £1bn, including Salesforce UK (£1.87bn, +11% revenue on −10% staff) and Midasplayer (£1.75bn — Candy Crush, not consulting).

Strip the impostors out and the pattern among the genuine technology arms is uniform: revenue flat-to-up, headcount down. Microsoft −6%, Cisco −5%, Cognizant −4%, Dell −2%, Salesforce −10%. These are sales-and-services organisations pushing more revenue through fewer people — margin defence in a year when clients kept buying but employers stopped hiring. The one large pure consultancy in the table, Capgemini UK, is also the one still doing both: +7% revenue, +3% staff, 14,050 people — the largest genuine consultancy workforce on the map, though its pre-tax profit slipped about 5%, the price of hiring through a squeeze. The other outlier worth naming is TikTok’s UK entity, which grew revenue 38% to £4.76bn and still lost £465M — a build-at-any-cost European expansion running through a UK company.

The shape of the market

Below the giants, this is a deep mid-market business. The £5–25M band is the centre of gravity — 718 companies, 68% profitable — and profitability climbs steadily with scale, to 84% at £100M–1bn and 90% above £1bn. The graveyard is at the bottom: the sub-£1M tier is only 36% profitable, a long tail of micro-consultancies, project shells and firms between contracts.

The honest consultancy margin is in the teens

Here is the sharpest contrast with our software map. A genuine software product company can run 60–90% margins because it sells the same code many times. An IT-services firm sells hours, and hours don’t scale — so the best-run independent operators in the £5–100M band cluster in the low-to-mid teens:

Check the revenue per head: £100–175k across the board. That’s what an honest people-business looks like — and 13–15% pre-tax on it is a good result, roughly what the strongest hauliers or recruiters earn. Anything in this category printing 25%-plus is almost never a consultancy: the high-margin names in the raw list are software vendors shelved here (Wall Street Systems at 39%, TSYS Card Tech at 29% on 32 staff, Bravura at 21% — all product businesses) or captive group arms whose margin is set by transfer pricing, not a market (Worldline IT Services UK, the French payments group’s services arm, at 23.6%, Microsoft Research’s Cambridge lab at 15%, Amazon’s Edinburgh development centre at 12%, Computershare’s in-house technology company at 14%, the Brambles and Liberty Mutual technology arms). A captive billing its own parent on cost-plus tells you about group policy, not competitiveness, so none of them make the competitive read. Nor does Ricardo-AEA (£84.2M, 10.9%) — a listed engineering group’s energy-and-environment consultancy — or Lindar Media (£96.9M, 12.5%), an online casino operator, not an IT firm.

Growth, read with care

The growth table needs the same impostor filter as the giants. The fastest “IT services” growers include a crypto market-maker (GSR International, £217M at a 34% margin — trading economics, not services), Reddit UK (+240%, a social network’s local arm), an autonomous-vehicle developer (Oxa, £74M of losses on £3M of revenue — venture R&D) and Engine by Starling (+235% but −£12M, a bank’s software venture in its investment phase). The genuine services signal is growth backed by hiring at a real margin: Calitii (+674% revenue, +400% staff, 15.6% margin) is the cleanest example of a consultancy actually scaling — though it was incorporated in mid-2023, so this is a second-year ramp rather than steady-state momentum; the +400% staff at a real margin is what makes it hiring-backed growth rather than a base-year artifact — and Eeze Entertainment (+271%, +148% staff) the same shape at smaller size. Extreme percentages off a small base — the +5,000% at the top of the raw list — are recognition artifacts or first full years, not momentum.

Market structure, ownership and vintage

The top of the curve is concentrated — the top 5 hold 29.8% of the £157.8bn, the top 10 nearly 40% — but as the giants table shows, that concentration is mostly booking-entity concentration: global hubs and impostors, not five firms dominating UK IT services. The genuine market underneath is deep and fragmented: it takes 100 companies to reach 71% of turnover, and the £5–100M bands hold nearly 1,200 firms.

Ownership splits almost exactly down the middle — 901 corporate-owned against 922 individual-owned — and about 14% (266 firms) carry a Holdings/Group/Bidco/Topco-style name, the structural fingerprint of a private-equity buyout or a planned exit. That squares with what the mid-market looks like on the ground: managed-services and infrastructure firms of the Littlefish/Onnec type are classic buy-and-build territory, recurring contracts making them financeable in a way project consultancies aren’t.

The vintage profile says something about barriers to entry: there aren’t any. Formation is steady across every decade — the 2000s cohort is the largest at 567, but the 2010s together produced 742 — and unlike road freight (anchored by pre-1990 family firms) or software (venture-shaped), IT services just keeps producing new mid-size firms. Selling expertise requires no capital; staying at scale is the hard part.

What the map shows

1. Revenue up, headcount down is the pattern of the year. All twelve giants grew revenue; seven cut staff — Microsoft +13%/−6%, Salesforce +11%/−10%. The technology majors are pushing more through fewer people.
2. The label lies. A fintech, a trading desk, PlayStation, Candy Crush and TikTok sit among the “biggest IT services companies”. Read what each entity actually does before comparing anything.
3. Revenue per head is the tell. Genuine consultancies run £100–200k per head; £1M-plus per head means a sales or global booking hub, and its revenue isn’t UK services work.
4. Hours don’t scale like code. The best-run independent consultancies earn 13–15% — a good result for a people-business, and a world away from the 60–90% the genuine software product firms print.
5. Capgemini is the exception that proves it. The one large pure consultancy is the one still growing revenue and headcount together — 14,050 people, +7%/+3% — at the cost of a ~5% dip in pre-tax profit.
6. No moat but scale. New firms form in every decade, ownership is half corporate, and one in seven carries buyout-vehicle naming — a fragmented mid-market that private equity is steadily rolling up.

Methodology and caveats

This covers only the UK IT-services and consultancy companies that publish a full profit-and-loss; most of the market’s long tail files abbreviated numbers and doesn’t appear. The category bundles global booking hubs, vendor sales arms, captive group technology companies and outright misfits alongside genuine consultancies — we flag and exclude them from competitive reads, but business-type labels are directional. Combined-turnover figures overstate UK activity because several large entities book worldwide contracts through UK companies. Several of the largest entities (TikTok’s UK company and Cisco International among them) file their accounts in US dollars; we convert to sterling at period-end rates, so those figures are approximate. Extreme proportional outliers are excluded from the charts. Figures are approximate — verify against a company’s own accounts before relying on any single number. This is analysis, not financial advice.