How much does Res Energy Services Limited make?

Res Energy Services Limited reported revenue of £34.8m and a loss of £2.1m in the year to 31 Oct 2025, according to its accounts filed at Companies House.

How many employees does Res Energy Services Limited have?

Res Energy Services Limited reported an average of 244 employees in the year to 31 Oct 2025.

Is Res Energy Services Limited profitable?

No — Res Energy Services Limited reported a loss of £2.1m in the year to 31 Oct 2025.

Company No. 10192806 · Incorporated 21 May 2016

Res Energy Services Limited

Registered name: RES ENERGY SERVICES LIMITED

Part of Renewable Energy Systems Holdings Limited group

Res Energy Services Limited made £34.8m revenue and a £2.1m loss in the year to 31 Oct 2025.

Res Energy Services Limited’s revenue was £34.8m in the year to 31 Oct 2025, with a loss of £2.1m and 244 employees. The company is classified under “repair of electrical equipment” and is based in Kings Langley; we hold 4 years of its filed accounts.

Full P&L filedSection C · ManufacturingSIC 33140Repair of electrical equipment SIC 33190Repair of other equipment

Status: Active
Location: Kings Langley, East of England
Age: 10 yrs · since 2016
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.

Latest accounts · year to 31 Oct 2025

Key figures

Capital-lightBoring industry

Revenue

£34.8m

Growth —

Profit

−£2.1m

Growth —

Profit margin

−6.1%

Gross 12.5%

Employees

244

Change —

Profit / employee

−£8.7k

Revenue/employee £143k

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	31 Dec 2022	31 Dec 2023	31 Dec 2024	31 Oct 2025
Disclosure	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£11m	£17.2m	£12.2m	£34.8m
Cost of sales	£4.2m	£9.5m	£4.1m	£30.4m
Gross profit	£6.7m	£7.7m	£8.2m	£4.4m
Operating profit	£692k	£563k	£162k	−£2m
Profit before tax	£692k	£563k	£100k	−£2m
Profit after tax	£560k	£429k	£75.5k	−£2.1m
Profit (best available)	£560k	£429k	£75.5k	−£2.1m
Staff costs	£4m	£4.6m	£5.4m	£13.1m
Employees (average)	101	105	117	244
Ratios
Profit margin	5.1%	2.5%	0.6%	−6.1%
Gross margin	61.3%	44.7%	66.8%	12.5%
Revenue per employee	£109k	£163k	£104k	£143k
Profit per employee	£5.5k	£4.1k	£645	−£8.7k
Cash conversion	7.9%	195.6%	175.3%	—
Growth (year on year)
Revenue growth	—	▲56.5%	▼28.8%	—
Profit growth	—	▼23.3%	▼82.4%	—
Headcount growth	—	▲4%	▲11.4%	—
Balance sheet — indirect signals, not revenue
Cash at bank	£196k	£796k	£175k	£3.3m
Net assets	£2.1m	£2m	£1.2m	£12.9m
Fixed assets	£52.1k	£34.1k	£19.3k	£2.4m
Current assets	£7.5m	£4.2m	£5.5m	£27.1m
Debtors	£2.1m	£1.8m	£2.4m	£10.8m
Deferred income	£3.6m	£255k	£125k	£3.8m
Cash from operations	£54.5k	£1.1m	£284k	—
Source	Accounts · bulk data Jun 2024	Accounts · bulk data Jun 2024	FullAccounts · bulk data Sep 2025	FullAccounts · bulk data Jul 2026

Derived from the latest filing

How the business works

Profit margin: −6.1%; Profit ÷ revenue.
Gross margin: 12.5%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £143k; Revenue ÷ average employees.
Profit per employee: −£8.7k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 7%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 10.8%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 31.1%; 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: —; Now £12.9m
Cash at bank: —; Now £3.3m
Headcount: —; Now 244
Deferred income: —; Now £3.8m
Fixed assets: —; Now £2.4m

Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.

Corporate ownership

Group structure

Ownership chain

Renewable Energy Systems Holdings Limitedultimate parent75–100%
Res Global Services Holdings Limited75–100%
Res Energy Services Limitedthis company

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

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

Same industry, similar size

Similar profitable businesses

Industry benchmarks →

Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Oct 2025 (profit −£2.1m), 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.