How much does Therma-Mech Ltd make?

Therma-Mech Ltd reported revenue of £24.3m and £3.4m profit in the year to 30 Jun 2025, according to its accounts filed at Companies House.

How many employees does Therma-Mech Ltd have?

Therma-Mech Ltd reported an average of 35 employees in the year to 30 Jun 2025.

Is Therma-Mech Ltd profitable?

Yes — Therma-Mech Ltd reported a profit of £3.4m in the year to 30 Jun 2025.

Company No. 08558628 · Incorporated 6 Jun 2013

Therma-Mech Ltd

Registered name: THERMA-MECH LTD

Part of Therma-Mech Developments Limited group

Therma-Mech Ltd made £24.3m revenue and £3.4m profit in the year to 30 Jun 2025.

Therma-Mech Ltd’s revenue grew 23% to £24.3m in the year to 30 Jun 2025, with £3.4m profit and 35 employees. The company is classified under “plumbing, heat and air-conditioning installation” and is based in Bristol; we hold 4 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 43220Plumbing, heat and air-conditioning installation

Status: Active
Location: Bristol, South West
Age: 13 yrs · since 2013
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: “Therma-Mech Developments Limited”

Latest accounts · year to 30 Jun 2025

Key figures

Capital-lightBoring industry

Revenue

£24.3m

Growth ▲22.6%

Profit

£3.4m

Growth ▲10.8%

Profit margin

14.1%

Gross 28.5%

Employees

Change ▲45.8%

Profit / employee

£98.2k

Revenue/employee £695k

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	30 Jun 2022	30 Jun 2023	30 Jun 2024	30 Jun 2025
Disclosure	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£15.2m	£16.6m	£19.9m	£24.3m
Cost of sales	£10.8m	£11.6m	£13.6m	£17.4m
Gross profit	£4.4m	£5m	£6.3m	£6.9m
Operating profit	£3.1m	£3.4m	£4.1m	£4.5m
Profit before tax	£3.1m	£3.4m	£4.1m	£4.5m
Profit after tax	£2.5m	£2.7m	£3.1m	£3.4m
Profit (best available)	£2.5m	£2.7m	£3.1m	£3.4m
Staff costs	£877k	£1.3m	£2.2m	£2.6m
Employees (average)	11	17	24	35
Ratios
Profit margin	16.6%	16.3%	15.6%	14.1%
Gross margin	29.1%	29.9%	31.7%	28.5%
Revenue per employee	£1.4m	£975k	£827k	£695k
Profit per employee	£229k	£159k	£129k	£98.2k
Growth (year on year)
Revenue growth	—	▲9.3%	▲19.8%	▲22.6%
Profit growth	—	▲7.4%	▲14.6%	▲10.8%
Headcount growth	—	▲54.5%	▲41.2%	▲45.8%
Balance sheet — indirect signals, not revenue
Cash at bank	£3.7m	£5.1m	£1.7m	£2.6m
Net assets	£4.6m	£6.1m	£2.8m	£4.5m
Fixed assets	£135k	£370k	£772k	£564k
Current assets	£9.1m	£8.8m	£7m	£10m
Debtors	£5.3m	£3.1m	£4.8m	£6.7m
Deferred income	£820k	£138k	£1.2m	£1.2m
Source	Accounts · bulk data May 2024	Accounts · bulk data May 2024	FullAccounts · bulk data Mar 2025	FullAccounts · bulk data Feb 2026

Derived from the latest filing

How the business works

Profit margin: 14.1%; Profit ÷ revenue.
Gross margin: 28.5%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £695k; Revenue ÷ average employees.
Profit per employee: £98.2k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 2.3%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 5%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 27.5%; 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: ▲59%; Now £4.5m
Cash at bank: ▲55%; Now £2.6m
Headcount: ▲46%; Now 35
Deferred income: ▼2%; Now £1.2m
Fixed assets: ▼27%; Now £564k

Corporate ownership

Group structure

Ownership chain

Therma-Mech Developments Limitedultimate parent75–100%
Therma-Mech Ltdthis 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 30 Jun 2025 (profit £3.4m), from the Companies House accounts bulk data published Feb 2026. Spotted an error? Request a correction.

Updated from Companies House on 15 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.