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- Bidonix Ltd
Company profile · Civil engineering
Bidonix Ltd
Bidonix Ltd is a newly incorporated private limited company registered in Covent Garden, company number 17387352, one of 132 civil engineering contractors in Covent Garden. Its next accounts are due at Companies House on 7 May 2028, and its first CT600 is due at HMRC on 6 August 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Bidonix Ltd is registered
The registered office is in Covent Garden (WC2H), in the Camden local authority area, London. Show WC2H 9JQ on a map.
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Shared registered office
4,529 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Bidonix 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 7 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 8 May 2028 to 7 Jun 2028 | £150 |
| 1 to 3 months late | 8 Jun 2028 to 7 Aug 2028 | £375 |
| 3 to 6 months late | 8 Aug 2028 to 7 Nov 2028 | £750 |
| More than 6 months late | From 8 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2029 | 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
- 17387352
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 August 2026
- Registered office
- 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Management consultancy activities other than financial management (SIC 70229)
Engineering related scientific and technical consulting activities (SIC 71122) - Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 18 August 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 Covent Garden
Other active civil engineering contractors registered in Covent Garden.
- Broadwell Holdings UK Ltd2025
- C911 Ltd2026
- Coleman Electrical Engineering UK Limited2026
- Composite Design Studio Ltd2019
- Concrete Frames Limited2026
- Consult4Construction Ltd2026
- Corelift & Engineering Ltd2025
- Corinium Power Limited2022
All civil engineering contractors in Covent Garden · All trades in Covent Garden · Civil engineering across the UK
Frequently asked questions
When are Bidonix Ltd's accounts due?
Bidonix Ltd's next accounts are due at Companies House by 7 May 2028 (in 573 days), covering the period to 31 August 2027.
When is Bidonix Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 6 August 2027, due by 6 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Bidonix Ltd still trading?
Bidonix 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 Bidonix Ltd do?
Bidonix Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Management consultancy activities other than financial management (SIC 70229); Engineering related scientific and technical consulting activities (SIC 71122).
How old is Bidonix Ltd?
Bidonix Ltd was incorporated on 7 August 2026, less than a year ago.
What is the penalty if Bidonix 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 Bidonix 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.