- Companies
- Civil engineering
- Sheerness
- Cplex Engineering UK Ltd
Cplex Engineering UK Ltd
- Company number
- 14955146
- Incorporated
- 22 Jun 20233 years trading
- Registered office
- 17 Plover Road, Minster on Sea, Sheerness, ME12 3GA
- Nature of business
- Construction of bridges and tunnels; Other engineering activities
Cplex Engineering UK Ltd is a 3-year-old private limited company registered in Sheerness, company number 14955146, one of 20 civil engineering contractors in Sheerness. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets unchanged on the year before, at £2,111.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £2,111 | £2,011 | £0 | 0 | |
| 30 Jun 2024 | £2,111 | £2,011 | 0 |
Where Cplex Engineering UK Ltd is registered
The registered office is in Sheerness (ME12), in the Swale local authority area, South East. Show ME12 3GA on a map.
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What happens if Cplex Engineering UK Ltd files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 14955146
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 June 2023 (3 years ago)
- Registered office
- 17 Plover Road, Minster on Sea, Sheerness, ME12 3GA
- Nature of business
- Construction of bridges and tunnels (SIC 42130)
Other engineering activities (SIC 71129) - Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 21 June 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Sheerness
Other active civil engineering contractors registered in Sheerness.
- Esenya Limited2018
- G.S. Utility Services Ltd2026
- Hunt Design Limited2005
- M91 Civils Ltd2023
- Masterbuild Plastics Limited1988
- Ots Consultancy Ltd2007
- P.D.K. Engineering Limited1999
- Pro Paving & Groundworks Ltd2021
All civil engineering contractors in Sheerness · All trades in Sheerness · Civil engineering across the UK
Frequently asked questions
When are Cplex Engineering UK Ltd's accounts due?
Cplex Engineering UK Ltd's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Cplex Engineering UK Ltd's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Cplex Engineering UK Ltd still trading?
Cplex Engineering UK Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Cplex Engineering UK Ltd do?
Cplex Engineering UK Ltd is registered under Construction of bridges and tunnels (SIC 42130); Other engineering activities (SIC 71129).
How old is Cplex Engineering UK Ltd?
Cplex Engineering UK Ltd was incorporated on 22 June 2023, 3 years ago.
What is the penalty if Cplex Engineering UK Ltd files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Cplex Engineering UK Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.