How much does Constant Security Services Limited make?

Constant Security Services Limited reported revenue of £24.9m and £421k profit in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does Constant Security Services Limited have?

Constant Security Services Limited reported an average of 881 employees in the year to 31 Dec 2025.

Is Constant Security Services Limited profitable?

Yes — Constant Security Services Limited reported a profit of £421k in the year to 31 Dec 2025.

Company No. 01933481 · Incorporated 25 Jul 1985

Constant Security Services Limited

Registered name: CONSTANT SECURITY SERVICES LIMITED

Constant Security Services Limited made £24.9m revenue and £421k profit in the year to 31 Dec 2025. read from filing text

Constant Security Services Limited’s revenue fell 20% to £24.9m in the year to 31 Dec 2025, with £421k profit and 881 employees. The company is classified under “private security activities” and is based in Mexborough; we hold 4 years of its filed accounts.

Full P&L filedSection N · Administrative and support servicesSIC 80100Private security activities

Status: Active
Location: Mexborough, Yorkshire and The Humber
Age: 41 yrs · since 1985
Type: Private Limited Company

Latest accounts · year to 31 Dec 2025

Key figures

IndependentCapital-lightBoring industryCash flow filed

Revenue

£24.9m

Growth ▼19.7%

Profit

£421k

Growth ▲0.8%

Profit margin

1.7%

Gross 15.4%

Employees

881

Change ▲8.8%

Profit / employee

£478

Revenue/employee £28.3k

Profitable streak

4yrs

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 Jul 2022	31 Jul 2023	31 Dec 2024	31 Dec 2025
Disclosure	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	£17.3m	£18.5m	£31.1m	£24.9m
Cost of sales	£14.2m	£15.3m	£26.2m	£21.1m
Gross profit	£3.1m	£3.2m	£4.8m	£3.8m
Operating profit	£402k	£351k	£550k	£541k
Profit before tax	£381k	£340k	£568k	£552k
Profit after tax	£309k	£273k	£417k	£421k
Profit (best available)	£309k	£273k	£417k	£421k
Staff costs	£14.8m	£16.2m	£27.4m	£21.9m
Employees (average)	819	808	810	881
Ratios
Profit margin	1.8%	1.5%	1.3%	1.7%
Gross margin	17.8%	17.3%	15.5%	15.4%
Revenue per employee	£21.1k	£22.9k	£38.3k	£28.3k
Profit per employee	£378	£338	£515	£478
Cash conversion	−32.3%	−123.4%	−134.4%	−160.2%
Growth (year on year)
Revenue growth	—	▲7.1%	—	▼19.7%
Profit growth	—	▼11.7%	—	▲0.8%
Headcount growth	—	▼1.3%	—	▲8.8%
Balance sheet — indirect signals, not revenue
Cash at bank	£1m	£1.1m	£1.5m	£1.9m
Net assets	£1.9m	£2m	£2.1m	£2.4m
Fixed assets	£103k	£62.6k	£18k	£132k
Current assets	£5m	£5.4m	£5.9m	£6.4m
Debtors	£3.7m	£3.9m	£4.1m	£4.3m
Deferred income	£662k	£730k	£784k	£781k
Cash from operations	−£130k	−£433k	−£739k	−£867k
Source	FullAccounts · bulk data Feb 2024	FullAccounts · bulk data Feb 2024	FullAccounts · bulk data Aug 2025	FullAccounts · bulk data Apr 2026

Derived from the latest filing

How the business works

Profit margin: 1.7%; Profit ÷ revenue.
Gross margin: 15.4%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £28.3k; Revenue ÷ average employees.
Profit per employee: £478; Profit ÷ average employees.
Cash conversion: −160.2%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 0.5%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 3.1%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 17.1%; 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: ▲10%; Now £2.4m
Cash at bank: ▲27%; Now £1.9m
Headcount: ▲9%; Now 881
Deferred income: ▼0%; Now £781k
Fixed assets: ▲635%; Now £132k

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 £421k), from the Companies House accounts bulk data published Apr 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.