How much does Btu (Installation & Maintenance) Limited make?

Btu (Installation & Maintenance) Limited reported revenue of £23m and £1.1m profit in the year to 31 Oct 2025, according to its accounts filed at Companies House.

How many employees does Btu (Installation & Maintenance) Limited have?

Btu (Installation & Maintenance) Limited reported an average of 125 employees in the year to 31 Oct 2025.

Is Btu (Installation & Maintenance) Limited profitable?

Yes — Btu (Installation & Maintenance) Limited reported a profit of £1.1m in the year to 31 Oct 2025.

Company No. 01561231 · Incorporated 13 May 1981

Btu (Installation & Maintenance) Limited

Registered name: BTU (INSTALLATION & MAINTENANCE) LIMITED

Part of Btu Holdings Limited group

Btu (Installation & Maintenance) Limited made £23m revenue and £1.1m profit in the year to 31 Oct 2025. read from filing text

Btu (Installation & Maintenance) Limited’s revenue grew 8% to £23m in the year to 31 Oct 2025, with £1.1m profit and 125 employees. The company is classified under “electrical installation” and is based in Surrey; we hold 4 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 43210Electrical installation SIC 43220Plumbing, heat and air-conditioning installation SIC 81100Combined facilities support activities

Status: Active
Location: Surrey, South East
Age: 45 yrs · since 1981
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 immediate parent of the company is BTU Holdings Limited, a company registered in England and Wales.”

Latest accounts · year to 31 Oct 2025

Key figures

Operating leverageBoring industryCash flow filed

Revenue

£23m

Growth ▲7.9%

Profit

£1.1m

Growth ▲144.2%

Profit margin

4.7%

Gross 27.4%

Employees

125

Change ▲3.3%

Profit / employee

£8.7k

Revenue/employee £184k

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&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)	£18.9m	£22m	£21.3m	£23m
Cost of sales	£13.3m	£15.9m	£15.6m	£16.7m
Gross profit	£5.6m	£6.1m	£5.7m	£6.3m
Operating profit	£732k	£462k	£512k	£1.3m
Profit before tax	£738k	£527k	£634k	£1.4m
Profit after tax	£615k	£424k	£443k	£1.1m
Profit (best available)	£615k	£424k	£443k	£1.1m
Staff costs	£5.7m	£6.3m	£6.7m	£6.7m
Employees (average)	115	122	121	125
Ratios
Profit margin	3.3%	1.9%	2.1%	4.7%
Gross margin	29.4%	27.7%	26.6%	27.4%
Revenue per employee	£164k	£181k	£176k	£184k
Profit per employee	£5.3k	£3.5k	£3.7k	£8.7k
Cash conversion	−106.2%	−166.3%	−72.9%	60.7%
Growth (year on year)
Revenue growth	—	▲16.9%	▼3.3%	▲7.9%
Profit growth	—	▼31%	▲4.5%	▲144.2%
Headcount growth	—	▲6.1%	▼0.8%	▲3.3%
Balance sheet — indirect signals, not revenue
Cash at bank	£2.2m	£2.9m	£3.1m	£2.2m
Net assets	£6.4m	£6.8m	£7.2m	£8.3m
Current assets	£10.7m	£11.4m	£12m	£14.4m
Debtors	£2.8m	£3m	£3.7m	£2.9m
Deferred income	£930k	£1.1m	£1.3m	£1.6m
Cash from operations	−£777k	−£769k	−£373k	£762k
Source	FullAccounts · bulk data Apr 2024	FullAccounts · bulk data Apr 2024	FullAccounts · bulk data Mar 2025	FullAccounts · bulk data Jun 2026

Derived from the latest filing

How the business works

Profit margin: 4.7%; Profit ÷ revenue.
Gross margin: 27.4%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £184k; Revenue ÷ average employees.
Profit per employee: £8.7k; Profit ÷ average employees.
Cash conversion: 60.7%; 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: 6.9%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 12.4%; 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: ▲15%; Now £8.3m
Cash at bank: ▼28%; Now £2.2m
Headcount: ▲3%; Now 125
Deferred income: ▲24%; Now £1.6m
Fixed assets: —; Now —

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

Btu Holdings Limitedultimate parent75–100%
Btu (Installation & Maintenance) 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 £1.1m), from the Companies House accounts bulk data published Jun 2026. Spotted an error? Request a correction.

Updated from Companies House on 16 Oct 2026

Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.