Tetra Tech Consulting Limited
Registered name: TETRA TECH CONSULTING LIMITED
Part of Tetra Tech, Inc. groupTetra Tech Consulting Limited made £112m revenue and £8.5m profit in the year to 28 Sep 2025.
Tetra Tech Consulting Limited’s revenue grew 7% to £112m in the year to 28 Sep 2025, with £8.5m profit and 830 employees. The company is classified under “other engineering activities” and is based in Abingdon; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- Abingdon
- Age
- 46 yrs · since 1979
- Type
- Private Limited Company
Key figures
Financial history
| Year to | 29 Sep 2023 | 28 Sep 2024 | 29 Sep 2024 | 28 Sep 2025 |
|---|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L | Full P&L |
| Profit & loss | ||||
| Revenue (turnover) | £85.2m | £105m | £105m | £112m |
| Cost of sales | −£50.5m | −£50.6m | −£50.6m | −£53.3m |
| Gross profit | £34.7m | £54.3m | £54.3m | £58.9m |
| Operating profit | £2.6m | £909k | £909k | £10.8m |
| Profit before tax | £3.6m | £1.5m | £1.5m | £10.8m |
| Profit after tax | £3.2m | −£623k | −£623k | £8.5m |
| Profit (best available) | £3.2m | −£623k | −£623k | £8.5m |
| Employees (average) | 971 | 949 | 949 | 830 |
| Ratios | ||||
| Profit margin | 3.8% | −0.6% | −0.6% | 7.6% |
| Gross margin | 40.7% | 51.7% | 51.7% | 52.5% |
| Revenue per employee | £87.8k | £111k | £111k | £135k |
| Profit per employee | £3.3k | −£656 | −£656 | £10.3k |
| Growth (year on year) | ||||
| Revenue growth | — | — | — | ▲6.9% |
| Headcount growth | — | — | — | ▼12.5% |
| Balance sheet — indirect signals, not revenue | ||||
| Net assets | — | — | — | — |
| Source | Accounts · bulk data May 2025 | Accounts · bulk data Apr 2026 | Accounts · bulk data May 2025 | Accounts · bulk data Apr 2026 |
How the business works
- Profit margin
- 7.6%
- Profit ÷ revenue.
- Gross margin
- 52.5%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £135k
- Revenue ÷ average employees.
- Profit per employee
- £10.3k
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- —
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- —
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- —
- 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 —
- Cash at bank
- —
- Now —
- Headcount
- ▼13%
- Now 830
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Tetra Tech, Inc. (registered outside the UK register)ultimate parent75–100%
- Tetra Tech UK Holdings Limited75–100%
- R P S Group Limited75–100%
- Tetra Tech Consulting Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Subsidiaries (2)
- RPS Ireland LimitedFigures not disclosed
- Tetra Tech Occupational Health LimitedFigures not disclosed
Sister companies (4)
- Tetra Tech RPS Energy Consultants LimitedRev. £13.8m · Profit £289k
- Ecl Group LimitedFigures not disclosed
- Tetra Tech Environmental Management LimitedFigures not disclosed
- Tetra Tech RPS Energy LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Sources
Latest figures from accounts for the year to 28 Sep 2025 (profit £8.5m), from the Companies House accounts bulk data published Apr 2026. Spotted an error? Request a correction.
Updated from Companies House on 23 Oct 2026
Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.