Tsi Turbo Service International Limited
Registered name: TSI TURBO SERVICE INTERNATIONAL LIMITED
Part of Turbo Service International Holdings Limited groupTsi Turbo Service International Limited made £19.7m revenue and £37k profit in the year to 31 Dec 2025.
Tsi Turbo Service International Limited’s revenue grew 4% to £19.7m in the year to 31 Dec 2025, with £37k profit and 52 employees. The company is classified under “manufacture of engines and turbines, except aircraft, vehicle and cycle engines” and is based in Southampton; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- Southampton, South East
- Age
- 14 yrs · since 2012
- 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.
Key figures
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| 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) | £16.7m | £17.9m | £19m | £19.7m |
| Cost of sales | £11m | £11.3m | £12m | £12.7m |
| Gross profit | £5.7m | £6.7m | £7m | £7m |
| Operating profit | £743k | £929k | £538k | £337k |
| Profit before tax | £639k | £758k | £376k | £169k |
| Profit after tax | £509k | £534k | £208k | £37k |
| Profit (best available) | £509k | £534k | £208k | £37k |
| Staff costs | £2.5m | £3.3m | £3.8m | £3.8m |
| Employees (average) | 36 | 44 | 51 | 52 |
| Ratios | ||||
| Profit margin | 3% | 3% | 1.1% | 0.2% |
| Gross margin | 34.4% | 37.2% | 37% | 35.4% |
| Revenue per employee | £464k | £408k | £373k | £379k |
| Profit per employee | £14.1k | £12.1k | £4.1k | £711 |
| Growth (year on year) | ||||
| Revenue growth | — | ▲7.5% | ▲6% | ▲3.7% |
| Profit growth | — | ▲5% | ▼61.1% | ▼82.2% |
| Headcount growth | — | ▲22.2% | ▲15.9% | ▲2% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £338k | £234k | £280k | £279k |
| Net assets | £442k | £176k | £27.1k | £64k |
| Fixed assets | £149k | £240k | £189k | £203k |
| Current assets | £6.3m | £6.3m | £5.6m | £6.5m |
| Debtors | £2.7m | £2.6m | £2.2m | £3.1m |
| Deferred income | £431k | £432k | £458k | £674k |
| Source | Accounts · bulk data Jul 2024 | Accounts · bulk data Jul 2024 | FullAccounts · bulk data Sep 2025 | FullAccounts · bulk data Sep 2026 |
How the business works
- Profit margin
- 0.2%
- Profit ÷ revenue.
- Gross margin
- 35.4%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £379k
- Revenue ÷ average employees.
- Profit per employee
- £711
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 1%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 3.4%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 15.5%
- 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
- ▲136%
- Now £64k
- Cash at bank
- ▼0%
- Now £279k
- Headcount
- ▲2%
- Now 52
- Deferred income
- ▲47%
- Now £674k
- Fixed assets
- ▲8%
- Now £203k
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
- Turbo Service International Holdings Limitedultimate parent75–100%
- Tsi Turbo Service International Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (1)
- Turbo Services International LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Similar profitable businesses
- Gilbert Gilkes & Gordon LimitedCumbria · Manufacture of engines and turbines, except aircraft, vehicle and cycle engines
- Revenue
- £25.1m
- Profit
- £930k
- Staff
- —
- John Hyde Engineering LimitedStoke on Trent · Manufacture of engines and turbines, except aircraft, vehicle and cycle engines
- Revenue
- £12.5m
- Profit
- £807k
- Staff
- 43
- Allam Power LimitedHull · Manufacture of engines and turbines, except aircraft, vehicle and cycle engines
- Revenue
- £42.2m
- Profit
- £1.1m
- Staff
- 40
Sources
Latest figures from FullAccounts for the year to 31 Dec 2025 (profit £37k), 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.