How much does H B Tunnelling Limited make?

H B Tunnelling Limited reported revenue of £37.7m and £6m profit in the year to 31 Mar 2025, according to its accounts filed at Companies House.

How many employees does H B Tunnelling Limited have?

H B Tunnelling Limited reported an average of 23 employees in the year to 31 Mar 2025.

Is H B Tunnelling Limited profitable?

Yes — H B Tunnelling Limited reported a profit of £6m in the year to 31 Mar 2025.

Company No. 06985679 · Incorporated 8 Aug 2009

H B Tunnelling Limited

Registered name: H B TUNNELLING LIMITED

Part of HPB Group Limited group

H B Tunnelling Limited made £37.7m revenue and £6m profit in the year to 31 Mar 2025.

H B Tunnelling Limited’s revenue grew 36% to £37.7m in the year to 31 Mar 2025, with £6m profit and 23 employees. The company is classified under “other specialised construction activities” and is based in Doncaster; we hold 4 years of its filed accounts.

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

Status: Active
Location: Doncaster, Yorkshire and The Humber
Age: 17 yrs · since 2009
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: “HPB Group Limited”

Latest accounts · year to 31 Mar 2025

Key figures

Capital-lightOperating leverageBoring industry

Revenue

£37.7m

Growth ▲36%

Profit

£6m

Growth ▲71.6%

Profit margin

16%

Gross 23.6%

Employees

Change ▲15%

Profit / employee

£262k

Revenue/employee £1.6m

Profitable streak

3yrs

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	No P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	—	£35.4m	£27.7m	£37.7m
Cost of sales	—	£29.6m	£22.5m	£28.8m
Gross profit	—	£5.8m	£5.2m	£8.9m
Operating profit	—	—	£3.9m	£7.2m
Profit before tax	—	£4.5m	£4m	£7.3m
Profit after tax	—	£3.9m	£3.5m	£6m
Profit (best available)	—	£3.9m	£3.5m	£6m
Staff costs	—	£1.1m	£1m	£1.5m
Employees (average)	13	18	20	23
Ratios
Profit margin	—	11.1%	12.7%	16%
Gross margin	—	16.3%	18.8%	23.6%
Revenue per employee	—	£2m	£1.4m	£1.6m
Profit per employee	—	£217k	£176k	£262k
Growth (year on year)
Revenue growth	—	—	▼21.7%	▲36%
Profit growth	—	—	▼10.2%	▲71.6%
Headcount growth	—	▲38.5%	▲11.1%	▲15%
Balance sheet — indirect signals, not revenue
Cash at bank	£1.8m	£3.6m	£5.3m	£6.2m
Net assets	£3.7m	£6m	£6.5m	£8.6m
Fixed assets	£768k	£1.8m	£2.6m	£3m
Current assets	£6.1m	£11.6m	£12m	£16.6m
Debtors	£831k	£5.7m	£5.5m	£9m
Deferred income	—	—	—	£46.9k
Source	Accounts · bulk data Dec 2023	Accounts · bulk data Dec 2023	FullAccounts · bulk data Dec 2024	FullAccounts · bulk data Oct 2025

Derived from the latest filing

How the business works

Profit margin: 16%; Profit ÷ revenue.
Gross margin: 23.6%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £1.6m; Revenue ÷ average employees.
Profit per employee: £262k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 7.8%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 0.1%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 23.9%; 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: ▲31%; Now £8.6m
Cash at bank: ▲18%; Now £6.2m
Headcount: ▲15%; Now 23
Deferred income: —; Now £46.9k
Fixed assets: ▲16%; Now £3m

Corporate ownership

Group structure

Ownership chain

HPB Group Limitedultimate parent75–100%
H B Tunnelling 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 Mar 2025 (profit £6m), from the Companies House accounts bulk data published Oct 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.