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- Dayline Engineering Construction Ltd
Company profile · Civil engineering
Dayline Engineering Construction Ltd
Dayline Engineering Construction Ltd is a 1-year-old private limited company registered in Treharris, company number 16125722, one of 5 civil engineering contractors in Treharris. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 31 March 2026, as filed at Companies House.
Where Dayline Engineering Construction Ltd is registered
The registered office is in Treharris (CF46), in the Merthyr Tydfil local authority area, Wales. Show CF46 5EU on a map.
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What happens if Dayline Engineering Construction 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 16125722
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 December 2024 (1 year ago)
- Registered office
- 3 Perrott Place, Treharris, CF46 5EU
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 8 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 Treharris
Other active civil engineering contractors registered in Treharris.
- Railey Utilities Limited2012
- S.M.T. Surveying & Civil Engineering Services Ltd2017
- Stadeyn Civils & Groundworks Ltd2026
- Bright Future Renewable Ltd2025
All civil engineering contractors in Treharris · All trades in Treharris · Civil engineering across the UK
Frequently asked questions
When are Dayline Engineering Construction Ltd's accounts due?
Dayline Engineering Construction Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Dayline Engineering Construction Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Dayline Engineering Construction Ltd still trading?
Dayline Engineering Construction 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 Dayline Engineering Construction Ltd do?
Dayline Engineering Construction Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Dayline Engineering Construction Ltd?
Dayline Engineering Construction Ltd was incorporated on 9 December 2024, 1 year ago.
What is the penalty if Dayline Engineering Construction 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 Dayline Engineering Construction 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.