UK Architect Fees and Practice Economics: What RIBA and ARB's Latest Data Actually Shows

UK architecture practices, taken together, generated £5.0 billion in revenue in the year to May 2025 — a 24% increase on the year before, the fastest nominal growth on record, and still up 19% once adjusted for inflation, the strongest annual rise since 2017 (RIBA Business Benchmarking 2025, prepared for RIBA by The Fees Bureau, published via riba.org; commentary by RIBA's Head of Research Adrian Malleson, RIBA Journal, 20 November 2025). Over the same period, the number of architects registered to practise in the UK fell to 38,981, down from 41,886 the year before (ARB Annual Report and Financial Statements 2024, published 10 July 2025).

Those two facts sitting side by side — more revenue, fewer architects — are the starting point for this article. What follows is a plain synthesis of the two primary surveys that actually measure UK architecture practice economics: RIBA's annual Benchmarking survey (financial data, published by RIBA) and ARB's Annual Report (the statutory regulator's register data). No modelling, no estimates dressed up as facts — where the public data stops, we say so.

What UK architecture practices actually earn, by size

RIBA's Benchmarking survey breaks practices into eight size bands, from sole practitioners up to firms with 100 or more staff. The averages by band are the clearest public picture of how UK architecture practice economics actually scale.

Practice size	Avg. revenue per practice	Avg. revenue per fee-earning employee	Avg. profit per practice
Sole practitioner	£55,900	£55,500	£24,000
100+ staff	£46.1 million	£171,200	£4.5 million

Source: RIBA Business Benchmarking 2025 Executive Summary (riba.org), verified July 2026.

The headline pattern sits in the middle column. Revenue per fee-earning employee — the cleanest like-for-like measure of how much work each person in a practice is generating — rises from around £55,500 at a sole-practitioner practice to £171,200 at a 100+-staff practice. That's roughly three times more revenue per person at the largest scale than at the smallest.

Why fee income per employee triples between a sole practitioner and a large practice

This isn't a story about larger practices doing better work or charging higher rates per hour — the survey doesn't report hourly or day rates at this level of public detail, so that comparison can't be made directly from the data. What the size-tier breakdown does show is concentration: small practices (1–9 staff) make up 78% of all UK architecture practices, but they account for only 23% of total staff and 13% of total sector revenue. Medium practices (10–49 staff) are 18% of practices, 33% of staff, and 26% of revenue. Large practices (50+ staff) are just 4% of all practices, but hold 44% of staff and 61% of revenue.

Put plainly: revenue in UK architecture is heavily concentrated in a small number of large practices, and the per-employee gap is a leverage effect — larger practices spread fixed costs, business development capacity, and larger commissions across more people, which lifts the average for everyone inside them. A sole practitioner or small team doesn't have that leverage available to them structurally. What they do have control over is how visible their specific expertise is to the buyers searching for it — which is a different lever, and one this article comes back to.

The takeaway: the revenue-per-employee gap between the smallest and largest UK practices is roughly threefold, and it's driven by scale and concentration — not by better work or higher rates that a small practice couldn't in principle command.

Where the profit actually sits — and who's seeing it improve

Profit follows a similar shape to revenue. Average profit per practice ranges from £24,000 at a sole-practitioner level to £4.5 million at a 100+-staff practice (RIBA Business Benchmarking 2025). RIBA's own commentary on the 2025 results describes profitability as having "finally improved" this year after nearly a decade of stagnation — and notes that the improvement was sharpest at the largest end of the market, with practices of 100+ staff seeing profits rise by more than 70% year on year.

The picture is less even lower down the scale. RIBA's data shows that revenue at one- and two-person practices actually declined over the same period — sole-principal average revenue came in at £55,859 (the mean figure) and two-person practices at £109,680. The Benchmarking survey doesn't publish an overall pre-tax profit margin as a single national percentage in its public Executive Summary — the full report, available to RIBA Chartered Practice members, likely contains more granular margin data than is published for general reference — so we're stating the profit figures that are actually public rather than inferring a margin that isn't.

Two other figures from the same survey put the sector's overall shape in context: payroll accounts for 52% of total practice expenditure across RIBA Chartered Practices, and London accounts for 67% of total UK architecture practice revenue, with international work growing 67% year on year to over £1.5 billion — now 31% of total sector revenue, up from 24% the year before.

The takeaway: the sector's growth and improved profitability in 2025 were real, but they were not evenly distributed — the largest practices captured most of the gain, while the smallest saw revenue fall.

The UK architect register is shrinking, not growing

Away from the financial data, ARB's Annual Report and Financial Statements 2024 (covering the year ended 31 December 2024, published 10 July 2025) gives the clearest picture of the profession's headcount. At the end of 2024, 38,981 architects were registered to practise in the UK — down from 41,886 at the end of 2023. That's a fall of just under 7% in a single year.

Many articles and directories online still quote "42,000+ architects" as the UK total. That figure is now out of date — the current verified figure, from ARB's own most recent published report, is lower.

Where architects are concentrated, and who's underrepresented

ARB's most detailed geographic and demographic breakdown — "Architects Today: Analysis of the Architects' Profession" — is dated April 2023 and based on 2022 Register data. We haven't found a more recent edition of this specific report, so the figures below should be read as the latest available rather than current-year data. They show that 50% of all UK architects are based in London and the South East, against 27% of the UK population living in those regions — a significant geographic concentration. The same report found that 31% of all registered architects were female (though 47% of new registrants in 2021 were female, suggesting the gap is narrowing among newer entrants), and that 88% of architects identified as White compared with 83% of the UK population, with 1% identifying as Black or Black British against 4% of the population.

ARB's more recent "2024 Year in Review" gives a narrower but more current snapshot of new registrants specifically: of architects newly registered in 2024, 67.3% identified as White, 18.8% as Asian or Asian British, 2.8% as Black or Black British, 4.3% as Mixed, and 6.7% as another ethnicity; 47.0% were female, 51.3% male, and 1.7% identified in another way. Read alongside the 2022 whole-register figures, the newer registrant cohort looks measurably more diverse than the profession as a whole — consistent with a slow generational shift rather than a sudden one.

The takeaway: the UK architecture profession is smaller than most public references currently claim, concentrated geographically around London and the South East, and shifting — gradually — toward a more diverse new-entrant cohort than the register as a whole.

The one number that doesn't exist: what practices spend on marketing

Here's where this article has to be honest about the limits of the public data. We looked for a named, dated UK survey reporting what architecture practices spend on marketing as a percentage of turnover, or how they report winning new work — referral versus marketing versus direct tender. We didn't find one.

Figures circulating online — "5–6% of turnover," "7–7.5% for professional services" — trace back to marketing agencies' own blog content and general cross-industry benchmarks, not to a named architecture-sector survey we could verify. RIBA runs a monthly Future Trends workload survey and a separate Future Business of Architecture research programme (which does report that roughly two-thirds of new commissions come from repeat business and word of mouth — a different question from marketing spend), but neither publishes a specific marketing-spend or lead-source breakdown in the material we could access.

That absence is itself worth noting. A profession generating £5 billion a year, where the largest practices have systematically more revenue per person than the smallest, has no public measurement of how practices actually market themselves or where their new work comes from beyond the broad referral finding above. Most practices are making decisions about visibility and new business with less data available to them than they have about almost anything else in the business.

That's part of why the practices we work with treat content as a measured, deliberate channel rather than a guess — what actually builds a client flow beyond referrals is the piece we'd point you to next if this gap in the data has you thinking about your own practice's approach.

The takeaway: if you can't find a benchmark for what architecture practices spend on marketing, that's not you missing something — the data genuinely doesn't exist publicly, which means most practices are guessing.

What this means if you're not in the top tier

Put the three findings together. UK architecture practice revenue is growing, but concentrated in a small number of large practices. The register is shrinking, which — all else equal — should mean less competition for the architects who remain. And no one has published a reliable picture of how practices actually grow their new-business pipeline through marketing, as distinct from referrals.

For the 78% of UK practices in the smallest size band, the structural leverage that lifts a large practice's per-employee revenue — spreading business development capacity and fixed costs across more people — isn't available. What is available is visibility: being the practice that shows up, with real expertise on display, when a prospective client is researching a specific type of project rather than just searching for "architect near me." How a content programme is actually built covers that mechanism in more depth, and why the referral model has a ceiling covers the risk of not having a second channel at all.

None of this is a guarantee — practice economics depend on location, specialism, and a dozen other factors this data can't capture. But the size-tier gap is real, it's documented by RIBA's own annual survey, and it's one of the clearest arguments available for why a small or mid-sized practice should treat visibility as a deliberate investment rather than an afterthought.

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