How much does Core Technology Systems (U.K.) Limited make?

Core Technology Systems (U.K.) Limited reported revenue of £13.8m and £1m profit in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does Core Technology Systems (U.K.) Limited have?

Core Technology Systems (U.K.) Limited reported an average of 85 employees in the year to 31 Dec 2025.

Is Core Technology Systems (U.K.) Limited profitable?

Yes — Core Technology Systems (U.K.) Limited reported a profit of £1m in the year to 31 Dec 2025.

Company No. 02502866 · Incorporated 17 May 1990

Core Technology Systems (U.K.) Limited

Registered name: CORE TECHNOLOGY SYSTEMS (U.K.) LIMITED

Core Technology Systems (U.K.) Limited made £13.8m revenue and £1m profit in the year to 31 Dec 2025.

Core Technology Systems (U.K.) Limited’s revenue was £13.8m in the year to 31 Dec 2025, with £1m profit and 85 employees. The company is classified under “business and domestic software development” and is based in London; we hold 4 years of its filed accounts.

Full P&L filedSection J · Information and communicationSIC 62012Business and domestic software development SIC 62020Information technology consultancy activities SIC 62090Other information technology service activities

Status: Active
Location: London, London
Age: 36 yrs · since 1990
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 company is controlled by Conor Callanan.”

Latest accounts · year to 31 Dec 2025

Key figures

Revenue

£13.8m

Growth —

Profit

£1m

Growth —

Profit margin

7.4%

Gross 36.1%

Employees

Change ▲7.6%

Profit / employee

£11.9k

Revenue/employee £162k

Profitable streak

1yr

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	No P&L	Profit only	Profit only	Full P&L
Profit & loss
Revenue (turnover)	—	—	—	£13.8m
Cost of sales	—	—	—	−£8.8m
Gross profit	—	—	—	£5m
Operating profit	—	—	—	£1.2m
Profit before tax	—	—	—	£1m
Profit after tax	—	−£674k	−£65.9k	£1m
Profit (best available)	—	−£674k	−£65.9k	£1m
Employees (average)	52	54	79	85
Ratios
Profit margin	—	—	—	7.4%
Gross margin	—	—	—	36.1%
Revenue per employee	—	—	—	£162k
Profit per employee	—	−£12.5k	−£834	£11.9k
Growth (year on year)
Headcount growth	—	▲3.9%	▲46.3%	▲7.6%
Balance sheet — indirect signals, not revenue
Cash at bank	£521k	£193k	£426k	—
Net assets	£1.1m	£432k	£716k	—
Fixed assets	£2.8m	£2m	£3.1m	—
Current assets	£2.5m	£2.6m	£2.2m	—
Debtors	£2m	£1.5m	£1.6m	—
Source	AbridgedAccounts · bulk data Sep 2024	AbridgedAccounts · bulk data Sep 2024	FullAccounts · bulk data Sep 2025	Accounts · bulk data Sep 2026

Derived from the latest filing

How the business works

Profit margin: 7.4%; Profit ÷ revenue.
Gross margin: 36.1%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £162k; Revenue ÷ average employees.
Profit per employee: £11.9k; 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: ▲8%; Now 85
Deferred income: —; Now —
Fixed assets: —; Now —

Corporate ownership

Group structure

Subsidiaries (2)

Company Net LimitedFigures not disclosed
Velocity IT LtdFigures not disclosed

From the Persons with Significant Control register (corporate controllers only).

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Sources

Companies House profile Filing history & original accounts

Latest figures from accounts for the year to 31 Dec 2025 (profit £1m), from the Companies House accounts bulk data published Sep 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.