How much does Selectamark Security Systems PLC make?

Selectamark Security Systems PLC reported revenue of £4.7m and £445k profit in the year to 31 Oct 2025, according to its accounts filed at Companies House.

How many employees does Selectamark Security Systems PLC have?

Selectamark Security Systems PLC reported an average of 20 employees in the year to 31 Oct 2025.

Is Selectamark Security Systems PLC profitable?

Yes — Selectamark Security Systems PLC reported a profit of £445k in the year to 31 Oct 2025.

Company No. 01024280 · Incorporated 16 Sep 1971

Selectamark Security Systems PLC

Registered name: SELECTAMARK SECURITY SYSTEMS PLC

Selectamark Security Systems PLC made £4.7m revenue and £445k profit in the year to 31 Oct 2025.

Selectamark Security Systems PLC’s revenue fell 4% to £4.7m in the year to 31 Oct 2025, with £445k profit and 20 employees. The company is classified under “security systems service activities” and is based in Locksbottom; we hold 4 years of its filed accounts.

Full P&L filedSection N · Administrative and support servicesSIC 80200Security systems service activities

Status: Active
Location: Locksbottom, London
Age: 55 yrs · since 1971
Type: Public Limited Company

Latest accounts · year to 31 Oct 2025

Key figures

IndependentCash flow filed

Revenue

£4.7m

Growth ▼3.6%

Profit

£445k

Growth ▼45.2%

Profit margin

9.5%

Gross 59.4%

Employees

Change 0%

Profit / employee

£22.3k

Revenue/employee £235k

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 Oct 2022	31 Oct 2023	31 Oct 2024	31 Oct 2025
Disclosure	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£3.6m	£4.4m	£4.9m	£4.7m
Cost of sales	£1.4m	£1.8m	£2.1m	£1.9m
Gross profit	£2.2m	£2.6m	£2.8m	£2.8m
Operating profit	£529k	£951k	£1.1m	£599k
Profit before tax	£526k	£967k	£1.1m	£631k
Profit after tax	£526k	£766k	£812k	£445k
Profit (best available)	£526k	£766k	£812k	£445k
Staff costs	£943k	£918k	£1m	£1.3m
Employees (average)	19	19	20	20
Ratios
Profit margin	14.4%	17.5%	16.7%	9.5%
Gross margin	60.4%	59.4%	57.7%	59.4%
Revenue per employee	£192k	£230k	£243k	£235k
Profit per employee	£27.7k	£40.3k	£40.6k	£22.3k
Cash conversion	−92.7%	−74%	−90.8%	−95.9%
Growth (year on year)
Revenue growth	—	▲19.9%	▲11.3%	▼3.6%
Profit growth	—	▲45.6%	▲6.1%	▼45.2%
Headcount growth	—	0%	▲5.3%	0%
Balance sheet — indirect signals, not revenue
Cash at bank	£1.3m	£2m	£2.7m	£3m
Net assets	£1.9m	£2.6m	£3.4m	£3.6m
Fixed assets	£747k	£715k	£696k	£673k
Current assets	£1.9m	£2.5m	£3.5m	£3.8m
Debtors	£185k	£150k	£209k	£253k
Deferred income	£9.6k	£4.8k	—	—
Cash from operations	−£490k	−£703k	−£957k	−£574k
Source	FullAccounts · bulk data Apr 2024	FullAccounts · bulk data Apr 2024	FullAccounts · bulk data Dec 2025	FullAccounts · bulk data Jul 2026

Derived from the latest filing

How the business works

Profit margin: 9.5%; Profit ÷ revenue.
Gross margin: 59.4%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £235k; Revenue ÷ average employees.
Profit per employee: £22.3k; Profit ÷ average employees.
Cash conversion: −95.9%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 14.3%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: —; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 5.4%; 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: ▲4%; Now £3.6m
Cash at bank: ▲11%; Now £3m
Headcount: 0%; Now 20
Deferred income: —; Now —
Fixed assets: ▼3%; Now £673k

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Oct 2025 (profit £445k), 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.