How much does Isoler Ltd. make?

Isoler Ltd. reported revenue of £10.6m and £1.4m profit in the year to 31 Mar 2025, according to its accounts filed at Companies House.

How many employees does Isoler Ltd. have?

Isoler Ltd. reported an average of 78 employees in the year to 31 Mar 2025.

Is Isoler Ltd. profitable?

Yes — Isoler Ltd. reported a profit of £1.4m in the year to 31 Mar 2025.

Company No. 02766783 · Incorporated 23 Nov 1992

Isoler Ltd.

Registered name: ISOLER LTD.

Part of Northern Bear PLC group

Isoler Ltd. made £10.6m revenue and £1.4m profit in the year to 31 Mar 2025. read from filing text

Isoler Ltd.’s revenue grew 40% to £10.6m in the year to 31 Mar 2025, with £1.4m profit and 78 employees. The company is classified under “other specialised construction activities” and is based in Durham; we hold 2 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 43999Other specialised construction activities n.e.c.

Status: Active
Location: Durham, North East
Age: 33 yrs · since 1992
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 Mar 2025

Key figures

Capital-lightOperating leverageDoing more with lessBoring industry

Revenue

£10.6m

Growth ▲40.2%

Profit

£1.4m

Growth ▲53%

Profit margin

12.9%

Gross 43.5%

Employees

Change ▼1.3%

Profit / employee

£17.5k

Revenue/employee £136k

Profitable streak

2yrs

Consecutive profitable years in our data

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

2 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Mar 2024	31 Mar 2025
Disclosure	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	£7.6m	£10.6m
Cost of sales	£4.4m	£6m
Gross profit	£3.2m	£4.6m
Operating profit	£935k	£1.6m
Profit before tax	£933k	£1.6m
Profit after tax	£894k	£1.4m
Profit (best available)	£894k	£1.4m
Staff costs	£3.9m	£4.5m
Employees (average)	79	78
Ratios
Profit margin	11.8%	12.9%
Gross margin	42.4%	43.5%
Revenue per employee	£95.6k	£136k
Profit per employee	£11.3k	£17.5k
Growth (year on year)
Revenue growth	—	▲40.2%
Profit growth	—	▲53%
Headcount growth	—	▼1.3%
Balance sheet — indirect signals, not revenue
Cash at bank	£452k	£1.2m
Net assets	£3.7m	£5.1m
Fixed assets	£95.5k	£239k
Current assets	£4.6m	£6.9m
Debtors	£1.3m	£2.1m
Deferred income	£333k	£712k
Source	FullAccounts · bulk data Dec 2025	FullAccounts · bulk data Dec 2025

Derived from the latest filing

How the business works

Profit margin: 12.9%; Profit ÷ revenue.
Gross margin: 43.5%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £136k; Revenue ÷ average employees.
Profit per employee: £17.5k; 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: 6.7%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 19.8%; 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: ▲37%; Now £5.1m
Cash at bank: ▲157%; Now £1.2m
Headcount: ▼1%; Now 78
Deferred income: ▲114%; Now £712k
Fixed assets: ▲150%; Now £239k

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

Northern Bear PLCultimate parent75–100%
Northern Bear Construction Limited75–100%
Isoler Ltd.this company

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

Sister companies (5)

MGM LtdRev. £15.2m · Profit £743k
Arcas Building Solutions LimitedRev. £8.5m · Profit £161k
J Lister Electrical LimitedRev. £5.4m · Profit £162k
H. Peel & Sons LimitedRev. £1.9m · Profit −£905k
Northern Bear (Safety) LimitedRev. £376k · Profit −£34.5k

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 £1.4m), 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.