Carbline Limited
Registered name: CARBLINE LIMITED
Part of Carbline Holdings Limited groupCarbline Limited made £41.7k revenue and a £4.1m loss in the year to 30 Apr 2025.
Carbline Limited’s revenue fell 82% to £41.7k in the year to 30 Apr 2025, with a loss of £4.1m and 3 employees. The company is classified under “activities of other holding companies” and is based in London; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- London, London
- Age
- 5 yrs · since 2021
- Type
- Private Limited Company
Pass-through vehicle. This looks like a holding, staffing or umbrella company. Its revenue and profit may largely pass through to or from other entities, so the figures may not reflect a standalone operating business. It is excluded from our opportunity lists.
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.
Key figures
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| Year to | 30 Apr 2022 | 30 Apr 2023 | 30 Apr 2024 | 30 Apr 2025 |
|---|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L | Full P&L |
| Profit & loss | ||||
| Revenue (turnover) | £41.7k | £41.7k | £226k | £41.7k |
| Gross profit | £41.7k | £41.7k | £226k | £41.7k |
| Operating profit | −£76.2k | £37.4k | £211k | £37.1k |
| Profit before tax | −£1.3m | −£1.9m | −£3.1m | −£4.1m |
| Profit after tax | −£1.3m | −£1.9m | −£3.1m | −£4.1m |
| Profit (best available) | −£1.3m | −£1.9m | −£3.1m | −£4.1m |
| Employees (average) | 3 | 3 | 3 | 3 |
| Ratios | ||||
| Profit margin | −3032% | −4547% | −1386% | −9762% |
| Gross margin | 100% | 100% | 100% | 100% |
| Revenue per employee | £13.9k | £13.9k | £75.3k | £13.9k |
| Profit per employee | −£421k | −£632k | −£1m | −£1.4m |
| Growth (year on year) | ||||
| Revenue growth | — | — | ▲442.1% | ▼81.5% |
| Headcount growth | — | — | 0% | 0% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £38.4k | £3k | £11.2k | £3.7k |
| Net assets | −£1.1m | −£3m | −£6.1m | −£10.2m |
| Fixed assets | £30.2m | £30.5m | £44.3m | £44.6m |
| Current assets | £38.5k | £3.1k | £11.2k | £3.7k |
| Debtors | £101 | £101 | £1 | £1 |
| Deferred income | £160k | £207k | £344k | £340k |
| Source | Accounts · bulk data Dec 2023 | Accounts · bulk data Dec 2023 | FullAccounts · bulk data Jul 2025 | FullAccounts · bulk data Jan 2026 |
How the business works
- Profit margin
- −9762%
- Profit ÷ revenue.
- Gross margin
- 100%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £13.9k
- Revenue ÷ average employees.
- Profit per employee
- −£1.4m
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 107143%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 815.9%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 0%
- Money owed by customers. Low = customers pay quickly.
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
- —
- Now −£10.2m
- Cash at bank
- ▼67%
- Now £3.7k
- Headcount
- 0%
- Now 3
- Deferred income
- ▼1%
- Now £340k
- Fixed assets
- ▲1%
- Now £44.6m
Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.
Group structure
Ownership chain
- Carbline Holdings Limitedultimate parent75–100%
- Carbline Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Subsidiaries (1)
- Clearway (Next Wave) Holdings LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Sources
Latest figures from FullAccounts for the year to 30 Apr 2025 (profit −£4.1m), from the Companies House accounts bulk data published Jan 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.