Cbmso Ltd
- Company number
- SC890657
- Incorporated
- 22 May 2026
- Registered office
- 48 Castlehill Avenue, Port Glasgow, Inverclyde, PA14 6NY
- Nature of business
- Construction of water projects
Cbmso Ltd is a newly incorporated private limited company registered in Port Glasgow, company number SC890657, one of the UK's civil engineering contractors. Its next accounts are due at Companies House on 22 February 2028, and its first CT600 is due at HMRC on 21 May 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.
Is this your company?
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Where Cbmso Ltd is registered
The registered office is in Port Glasgow (PA14), in the Inverclyde local authority area, Scotland. Show PA14 6NY on a map.
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What happens if Cbmso 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 22 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 23 Feb 2028 to 22 Mar 2028 | £150 |
| 1 to 3 months late | 23 Mar 2028 to 22 May 2028 | £375 |
| 3 to 6 months late | 23 May 2028 to 22 Aug 2028 | £750 |
| More than 6 months late | From 23 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- SC890657
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 May 2026
- Registered office
- 48 Castlehill Avenue, Port Glasgow, Inverclyde, PA14 6NY
- Nature of business
- Construction of water projects (SIC 42910)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
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 Port Glasgow
Other active civil engineering contractors registered in Port Glasgow.
All civil engineering contractors in Port Glasgow · All trades in Port Glasgow · Civil engineering across the UK
Frequently asked questions
When are Cbmso Ltd's accounts due?
Cbmso Ltd's next accounts are due at Companies House by 22 February 2028 (in 498 days), covering the period to 31 May 2027.
When is Cbmso 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 21 May 2027, due by 21 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Cbmso Ltd still trading?
Cbmso 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 Cbmso Ltd do?
Cbmso Ltd is registered under Construction of water projects (SIC 42910).
How old is Cbmso Ltd?
Cbmso Ltd was incorporated on 22 May 2026, less than a year ago.
What is the penalty if Cbmso 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 Cbmso 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.