How much does Thornton Tomasetti Limited make?

Thornton Tomasetti Limited reported revenue of £20.5m and a loss of £69.4k in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does Thornton Tomasetti Limited have?

Thornton Tomasetti Limited reported an average of 77 employees in the year to 31 Dec 2025.

Is Thornton Tomasetti Limited profitable?

No — Thornton Tomasetti Limited reported a loss of £69.4k in the year to 31 Dec 2025.

Company No. 05888655 · Incorporated 27 Jul 2006

Thornton Tomasetti Limited

Registered name: THORNTON TOMASETTI LIMITED

Thornton Tomasetti Limited made £20.5m revenue and a £69.4k loss in the year to 31 Dec 2025. read from filing text

Thornton Tomasetti Limited’s revenue grew 45% to £20.5m in the year to 31 Dec 2025, with a loss of £69.4k and 77 employees. The company is classified under “architectural activities” and is based in London; we hold 4 years of its filed accounts.

Full P&L filedSection M · Professional, scientific and technical activitiesSIC 71111Architectural activities SIC 71129Other engineering activities

Status: Active
Location: London, London
Age: 20 yrs · since 2006
Type: Private Limited Company

Part of a group. The filing indicates this company sits within a group structure, so its results may depend on intra-group trading and it may be hard to replicate independently. From the filing: “The ultimate parent company is Thornton Tomasetti Inc, a company registered in the United States of America,”

Latest accounts · year to 31 Dec 2025

Key figures

Capital-light

Revenue

£20.5m

Growth ▲45.4%

Profit

−£69.4k

Growth ▼106.7%

Profit margin

−0.3%

Gross 33.7%

Employees

Change ▲16.7%

Profit / employee

−£901

Revenue/employee £266k

Profitable streak

0yrs

Consecutive profitable years in our data

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

4 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Dec 2022	31 Dec 2023	31 Dec 2024	31 Dec 2025
Disclosure	Profit only	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	—	£10m	£14.1m	£20.5m
Cost of sales	—	£4.5m	£7.1m	£13.6m
Gross profit	—	£5.5m	£7m	£6.9m
Operating profit	—	£1.3m	£1.3m	−£47.2k
Profit before tax	—	£1.3m	£1.3m	−£47.2k
Profit after tax	£926k	£994k	£1m	−£69.4k
Profit (best available)	£926k	£994k	£1m	−£69.4k
Staff costs	—	£5.2m	£6.5m	£8.2m
Employees (average)	49	58	66	77
Ratios
Profit margin	—	10%	7.4%	−0.3%
Gross margin	—	54.9%	49.8%	33.7%
Revenue per employee	—	£172k	£213k	£266k
Profit per employee	£18.9k	£17.1k	£15.8k	−£901
Growth (year on year)
Revenue growth	—	—	▲41.1%	▲45.4%
Profit growth	—	▲7.4%	▲4.6%	▼106.7%
Headcount growth	—	▲18.4%	▲13.8%	▲16.7%
Balance sheet — indirect signals, not revenue
Cash at bank	£1.1m	£155k	£890k	£535k
Net assets	£2.9m	£3.9m	£4.9m	£4.9m
Fixed assets	£218k	£236k	£209k	£230k
Current assets	£6m	£7.8m	£10.8m	£18.7m
Debtors	£2m	£3.2m	£4.3m	£10.7m
Deferred income	£1.4m	£1.4m	£1.9m	£1.9m
Source	FullAccounts · bulk data Jul 2024	FullAccounts · bulk data Jul 2024	FullAccounts · bulk data Sep 2025	FullAccounts · bulk data Jul 2026

Derived from the latest filing

How the business works

Profit margin: −0.3%; Profit ÷ revenue.
Gross margin: 33.7%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £266k; Revenue ÷ average employees.
Profit per employee: −£901; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 1.1%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 9.1%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 52%; Money owed by customers. Low = customers pay quickly.

Indirect — not revenue

Balance-sheet signals

Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.

Net assets: ▼1%; Now £4.9m
Cash at bank: ▼40%; Now £535k
Headcount: ▲17%; Now 77
Deferred income: ▼2%; Now £1.9m
Fixed assets: ▲10%; Now £230k

Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Dec 2025 (profit −£69.4k), from the Companies House accounts bulk data published Jul 2026. Spotted an error? Request a correction.

Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.