Coso Ltd
- Company number
- 16148017
- Incorporated
- 21 Dec 20241 year trading
- Registered office
- 24 Marston Road, New Milton, BH25 5DT
- Nature of business
- Construction of other civil engineering projects n.e.c.
Coso Ltd is a 1-year-old private limited company registered in New Milton, company number 16148017, one of 6 civil engineering contractors in New Milton. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 December 2025, as filed at Companies House.
Where Coso Ltd is registered
The registered office is in New Milton (BH25), in the New Forest local authority area, South East. Show BH25 5DT on a map.
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What happens if Coso 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 16148017
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 December 2024 (1 year ago)
- Registered office
- 24 Marston Road, New Milton, BH25 5DT
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 20 December 2025
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 New Milton
Other active civil engineering contractors registered in New Milton.
- Eirecore Ltd2025
- Scape Construct Limited2015
- Space & Solutions Limited2008
- A Beament Limited2010
- Built by Lumi Limited2023
All civil engineering contractors in New Milton · All trades in New Milton · Civil engineering across the UK
Frequently asked questions
When are Coso Ltd's accounts due?
Coso Ltd's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is Coso Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Coso Ltd still trading?
Coso 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 Coso Ltd do?
Coso Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Coso Ltd?
Coso Ltd was incorporated on 21 December 2024, 1 year ago.
What is the penalty if Coso 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 Coso 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.