How much does GT Diagnostics (UK) Limited make?

GT Diagnostics (UK) Limited reported revenue of £712k and £42.3k profit in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does GT Diagnostics (UK) Limited have?

GT Diagnostics (UK) Limited reported an average of 3 employees in the year to 31 Dec 2025.

Is GT Diagnostics (UK) Limited profitable?

Yes — GT Diagnostics (UK) Limited reported a profit of £42.3k in the year to 31 Dec 2025.

Company No. 12860189 · Incorporated 7 Sep 2020

GT Diagnostics (UK) Limited

Registered name: GT DIAGNOSTICS (UK) LIMITED

GT Diagnostics (UK) Limited made £712k revenue and £42.2k profit in the year to 31 Dec 2025.

GT Diagnostics (UK) Limited’s revenue grew 13% to £712k in the year to 31 Dec 2025, with £42.3k profit and 3 employees. The company is classified under “other research and experimental development on natural sciences and engineering” and is based in London; we hold 3 years of its filed accounts.

Full P&L filedSection M · Professional, scientific and technical activitiesSIC 72190Other research and experimental development on natural sciences and engineering

Status: Active
Location: London, London
Age: 6 yrs · since 2020
Type: Private Limited Company

Latest accounts · year to 31 Dec 2025

Key figures

IndependentSmall teamOperating leverage

Revenue

£712k

Growth ▲13.1%

Profit

£42.3k

Growth ▲57.6%

Profit margin

5.9%

Gross 80%

Employees

Change 0%

Profit / employee

£14.1k

Revenue/employee £237k

Profitable streak

3yrs

Consecutive profitable years in our data

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

3 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Dec 2023	31 Dec 2024	31 Dec 2025
Disclosure	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£866k	£629k	£712k
Cost of sales	−£166k	−£142k	−£142k
Gross profit	£700k	£488k	£570k
Operating profit	£84.9k	£60.6k	£68.3k
Profit before tax	£84.9k	£60.6k	£68.3k
Profit after tax	£63.9k	£26.8k	£42.3k
Profit (best available)	£63.9k	£26.8k	£42.3k
Employees (average)	3	3	3
Ratios
Profit margin	7.4%	4.3%	5.9%
Gross margin	80.9%	77.5%	80%
Revenue per employee	£289k	£210k	£237k
Profit per employee	£21.3k	£8.9k	£14.1k
Growth (year on year)
Revenue growth	—	▼27.3%	▲13.1%
Profit growth	—	▼58.1%	▲57.6%
Headcount growth	—	0%	0%
Balance sheet — indirect signals, not revenue
Net assets	—	—	—
Source	Accounts · bulk data Aug 2025	Accounts · bulk data Aug 2025	Accounts · bulk data Sep 2026

Derived from the latest filing

How the business works

Profit margin: 5.9%; Profit ÷ revenue.
Gross margin: 80%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £237k; Revenue ÷ average employees.
Profit per employee: £14.1k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: —; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: —; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: —; 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: —; Now —
Cash at bank: —; Now —
Headcount: 0%; Now 3
Deferred income: —; Now —
Fixed assets: —; Now —

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Sources

Companies House profile Filing history & original accounts

Latest figures from accounts for the year to 31 Dec 2025 (profit £42.3k), from the Companies House accounts bulk data published Sep 2026. Spotted an error? Request a correction.

Updated from Companies House on 11 Oct 2026

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