How much does Isothermal Technology Limited make?

Isothermal Technology Limited reported revenue of £7.3m and £1.1m profit in the year to 31 Mar 2025, according to its accounts filed at Companies House.

How many employees does Isothermal Technology Limited have?

Isothermal Technology Limited reported an average of 57 employees in the year to 31 Mar 2025.

Is Isothermal Technology Limited profitable?

Yes — Isothermal Technology Limited reported a profit of £1.1m in the year to 31 Mar 2025.

Company No. 01530620 · Incorporated 27 Nov 1980

Isothermal Technology Limited

Registered name: ISOTHERMAL TECHNOLOGY LIMITED

Isothermal Technology Limited made £7.3m revenue and £1.1m profit in the year to 31 Mar 2025.

Isothermal Technology Limited’s revenue grew 12% to £7.3m in the year to 31 Mar 2025, with £1.1m profit and 57 employees. The company is classified under “manufacture of other electrical equipment” and is based in Merseyside; we hold 4 years of its filed accounts.

Full P&L filedSection C · ManufacturingSIC 27900Manufacture of other electrical equipment

Status: Active
Location: Merseyside, North West
Age: 45 yrs · since 1980
Type: Private Limited Company

Latest accounts · year to 31 Mar 2025

Key figures

IndependentOperating leverageCash flow filed

Revenue

£7.3m

Growth ▲11.6%

Profit

£1.1m

Growth ▲66%

Profit margin

15.6%

Gross 51.2%

Employees

Change ▲5.6%

Profit / employee

£20k

Revenue/employee £129k

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 Mar 2022	31 Mar 2023	31 Mar 2024	31 Mar 2025
Disclosure	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£5.3m	£5.6m	£6.6m	£7.3m
Cost of sales	£3m	£3.1m	£3.6m	£3.6m
Gross profit	£2.3m	£2.5m	£2.9m	£3.8m
Operating profit	£591k	£464k	£885k	£1.5m
Profit before tax	£584k	£469k	£929k	£1.5m
Profit after tax	£814k	£421k	£687k	£1.1m
Profit (best available)	£814k	£421k	£687k	£1.1m
Staff costs	£2m	£2.3m	£2.4m	£2.6m
Employees (average)	54	54	54	57
Ratios
Profit margin	15.2%	7.5%	10.5%	15.6%
Gross margin	43.5%	44.2%	44.6%	51.2%
Revenue per employee	£99k	£104k	£122k	£129k
Profit per employee	£15.1k	£7.8k	£12.7k	£20k
Cash conversion	−113.7%	−58.9%	−104.9%	−57.5%
Growth (year on year)
Revenue growth	—	▲5.4%	▲16.4%	▲11.6%
Profit growth	—	▼48.3%	▲63.2%	▲66%
Headcount growth	—	0%	0%	▲5.6%
Balance sheet — indirect signals, not revenue
Cash at bank	£3.4m	£3.2m	£3.8m	£4.1m
Net assets	£7.8m	£7.9m	£8.3m	£9.1m
Fixed assets	£805k	£785k	£793k	£773k
Current assets	£7.7m	£7.8m	£8.2m	£9.5m
Debtors	£899k	£1m	£963k	£1.3m
Deferred income	£139k	£99.9k	£198k	—
Cash from operations	−£672k	−£273k	−£929k	−£849k
Source	Accounts · bulk data Dec 2023	Accounts · bulk data Dec 2023	FullAccounts · bulk data Dec 2024	FullAccounts · bulk data Dec 2025

Derived from the latest filing

How the business works

Profit margin: 15.6%; Profit ÷ revenue.
Gross margin: 51.2%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £129k; Revenue ÷ average employees.
Profit per employee: £20k; Profit ÷ average employees.
Cash conversion: −57.5%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 10.5%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: —; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 17.7%; 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: ▲10%; Now £9.1m
Cash at bank: ▲9%; Now £4.1m
Headcount: ▲6%; Now 57
Deferred income: —; Now —
Fixed assets: ▼3%; Now £773k

Corporate ownership

Group structure

Subsidiaries (1)

Metrosol LimitedFigures not disclosed

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

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Mar 2025 (profit £1.1m), from the Companies House accounts bulk data published Dec 2025. 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.