How much does Alertsystems Limited make?

Alertsystems Limited reported revenue of £11.7m and a loss of £211k in the year to 30 Apr 2025, according to its accounts filed at Companies House.

How many employees does Alertsystems Limited have?

Alertsystems Limited reported an average of 137 employees in the year to 30 Apr 2025.

Is Alertsystems Limited profitable?

No — Alertsystems Limited reported a loss of £211k in the year to 30 Apr 2025.

Company No. 03127248 · Incorporated 17 Nov 1995

Alertsystems Limited

Registered name: ALERTSYSTEMS LIMITED

Part of Alertsystems Group Limited group

Alertsystems Limited made £11.7m revenue and a £211k loss in the year to 30 Apr 2025.

Alertsystems Limited’s revenue fell 12% to £11.7m in the year to 30 Apr 2025, with a loss of £211k and 137 employees. The company is classified under “security systems service activities” and is based in Trowbridge; we hold 4 years of its filed accounts.

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

Status: Active
Location: Trowbridge, South West
Age: 30 yrs · since 1995
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: “AlertSystems Group Limited”

Latest accounts · year to 30 Apr 2025

Key figures

Capital-light

Revenue

£11.7m

Growth ▼11.8%

Profit

−£211k

Growth ▼151.9%

Profit margin

−1.8%

Gross 30.4%

Employees

137

Change ▲1.5%

Profit / employee

−£1.5k

Revenue/employee £85.5k

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	30 Apr 2022	30 Apr 2023	30 Apr 2024	30 Apr 2025
Disclosure	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£11.4m	£13.1m	£13.3m	£11.7m
Cost of sales	£7.3m	£8.6m	£8.8m	£8.1m
Gross profit	£4.1m	£4.5m	£4.4m	£3.6m
Profit before tax	£1m	£1.1m	£516k	−£285k
Profit after tax	£844k	£847k	£407k	−£211k
Profit (best available)	£844k	£847k	£407k	−£211k
Staff costs	£4.7m	£5.1m	£5.7m	£5.9m
Employees (average)	128	128	135	137
Ratios
Profit margin	7.4%	6.5%	3.1%	−1.8%
Gross margin	35.8%	34.1%	33.3%	30.4%
Revenue per employee	£88.7k	£102k	£98.3k	£85.5k
Profit per employee	£6.6k	£6.6k	£3k	−£1.5k
Growth (year on year)
Revenue growth	—	▲15.5%	▲1.2%	▼11.8%
Profit growth	—	▲0.3%	▼51.9%	▼151.9%
Headcount growth	—	0%	▲5.5%	▲1.5%
Balance sheet — indirect signals, not revenue
Cash at bank	£2.6m	£2.5m	£1.5m	£533k
Net assets	£2.6m	£2.7m	£2.2m	£1.3m
Fixed assets	£188k	£282k	£357k	£229k
Current assets	£6.5m	£6m	£5.5m	£4m
Debtors	£2.3m	£1.7m	£2.4m	£1.9m
Deferred income	£2.2m	£1.8m	£1.6m	£1.6m
Source	Accounts · bulk data Jan 2024	Accounts · bulk data Jan 2024	FullAccounts · bulk data Jan 2025	FullAccounts · bulk data Jan 2026

Derived from the latest filing

How the business works

Profit margin: −1.8%; Profit ÷ revenue.
Gross margin: 30.4%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £85.5k; Revenue ÷ average employees.
Profit per employee: −£1.5k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 2%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 14.1%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 16.3%; 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: ▼41%; Now £1.3m
Cash at bank: ▼63%; Now £533k
Headcount: ▲1%; Now 137
Deferred income: ▲1%; Now £1.6m
Fixed assets: ▼36%; Now £229k

Corporate ownership

Group structure

Ownership chain

Alertsystems Group Limitedultimate parent75–100%
Alertsystems Limitedthis company

Bands show the share of ownership each company holds in the one below it.

Sister companies (2)

Alert Data LimitedFigures not disclosed
Alert Monitoring LimitedFigures not disclosed

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

Same industry, similar size

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Industry benchmarks →

Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 30 Apr 2025 (profit −£211k), from the Companies House accounts bulk data published Jan 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.