How much does Isotank Depot Services Limited make?

Isotank Depot Services Limited reported revenue of £14.1m and £1.4m profit in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does Isotank Depot Services Limited have?

Isotank Depot Services Limited reported an average of 117 employees in the year to 31 Dec 2025.

Is Isotank Depot Services Limited profitable?

Yes — Isotank Depot Services Limited reported a profit of £1.4m in the year to 31 Dec 2025.

Company No. 04786989 · Incorporated 4 Jun 2003

Isotank Depot Services Limited

Registered name: ISOTANK DEPOT SERVICES LIMITED

Part of Boasso America Corporation group

Isotank Depot Services Limited made £14.1m revenue and £1.4m profit in the year to 31 Dec 2025.

Isotank Depot Services Limited’s revenue fell 8% to £14.1m in the year to 31 Dec 2025, with £1.4m profit and 117 employees. The company is classified under “other cleaning services” and is based in Redcar; we hold 4 years of its filed accounts.

Full P&L filedSection N · Administrative and support servicesSIC 81299Other cleaning services

Status: Active
Location: Redcar, North East
Age: 23 yrs · since 2003
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 Dec 2025

Key figures

Boring industry

Revenue

£14.1m

Growth ▼8.4%

Profit

£1.4m

Growth ▼26.9%

Profit margin

9.9%

Gross 46.4%

Employees

117

Change ▼2.5%

Profit / employee

£11.9k

Revenue/employee £121k

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 Dec 2022	31 Dec 2023	31 Dec 2024	31 Dec 2025
Disclosure	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£12.7m	£14.8m	£15.4m	£14.1m
Cost of sales	£6.9m	£8.1m	£8m	£7.6m
Gross profit	£5.8m	£6.8m	£7.4m	£6.6m
Operating profit	£1.1m	£1m	£1.9m	—
Profit before tax	£1.1m	£1m	£1.9m	£1.2m
Profit after tax	£880k	£767k	£1.9m	£1.4m
Profit (best available)	£880k	£767k	£1.9m	£1.4m
Staff costs	£3.7m	£4m	£4.4m	£4.8m
Employees (average)	116	114	120	117
Ratios
Profit margin	6.9%	5.2%	12.4%	9.9%
Gross margin	45.8%	45.6%	47.8%	46.4%
Revenue per employee	£110k	£130k	£128k	£121k
Profit per employee	£7.6k	£6.7k	£15.9k	£11.9k
Growth (year on year)
Revenue growth	—	▲16.4%	▲4.1%	▼8.4%
Profit growth	—	▼12.9%	▲149.3%	▼26.9%
Headcount growth	—	▼1.7%	▲5.3%	▼2.5%
Balance sheet — indirect signals, not revenue
Cash at bank	£1m	£649k	£674k	£142k
Net assets	£6.8m	£6.8m	£7.4m	£8m
Fixed assets	£1.4m	£4.5m	£4.9m	£4.4m
Current assets	£7.9m	£5.1m	£5.5m	£5.9m
Debtors	£2.3m	£3.1m	£3m	£3m
Deferred income	£764k	£828k	£720k	£919k
Source	FullAccounts · bulk data Sep 2024	FullAccounts · bulk data Sep 2024	FullAccounts · bulk data Sep 2025	FullAccounts · bulk data Sep 2026

Derived from the latest filing

How the business works

Profit margin: 9.9%; Profit ÷ revenue.
Gross margin: 46.4%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £121k; Revenue ÷ average employees.
Profit per employee: £11.9k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 31.3%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 6.5%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 21.5%; 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: ▲7%; Now £8m
Cash at bank: ▼79%; Now £142k
Headcount: ▼3%; Now 117
Deferred income: ▲28%; Now £919k
Fixed assets: ▼10%; Now £4.4m

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

Boasso America Corporation (registered outside the UK register)ultimate parent75–100%
Depot Connect International Limited75–100%
Depot Connect International UK Limited75–100%
Isotank Services Limited75–100%
Isotank Depot Services Limitedthis company

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

Sister companies (6)

Isotank Transport Services LimitedRev. £11.3m · Profit −£515k
Atlantic Tank Clean Barry LimitedFigures not disclosed
Isotank (2006) LimitedFigures not disclosed
Isotank (2010) LimitedFigures not disclosed
PM Rees & Sons 2000 LimitedFigures not disclosed
Tanktainer Thurroclean (Middlesbrough) 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 Dec 2025 (profit £1.4m), from the Companies House accounts bulk data published Sep 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.