- Companies
- Civil engineering
- Porth
- NJ Rail Ltd
NJ Rail Ltd
- Company number
- 15796261
- Incorporated
- 23 Jun 20242 years trading
- Registered office
- 3 Heath Terrace, Porth, CF39 0HS
- Nature of business
- Construction of railways and underground railways
NJ Rail Ltd is a 2-year-old private limited company registered in Porth, company number 15796261, one of 24 civil engineering contractors in Porth. 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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Financial snapshot, 2025
From the balance sheet at 30 June 2025, as filed at Companies House.
Where NJ Rail Ltd is registered
The registered office is in Porth (CF39), in the Rhondda Cynon Taf local authority area, Wales. Show CF39 0HS on a map.
Other trade companies in CF39
- Nvme Detailing LimitedMechanics and garages
- Choctar LimitedBuilders
- J Cantwell Surfacing & Contracting LtdCivil engineering
- Ok Rail LtdCivil engineering
- Porth Ceilings & Interiors LtdFinishing trades
- Wydex LtdBuilders
- Time Lec Services LtdElectricians
- Arb-Scape Tree Surgery & Landscaping LtdLandscapers and gardeners
What happens if NJ Rail 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
- 15796261
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 June 2024 (2 years ago)
- Registered office
- 3 Heath Terrace, Porth, CF39 0HS
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 22 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 Porth
Other active civil engineering contractors registered in Porth.
- Ojl Brickwork Rail Ltd2016
- Ok Rail Ltd2026
- PGS Plant & Surfacing Ltd2019
- Premier Groundworks Solutions Ltd2014
- Ruby Red Consulting Ltd2026
- S.L.N. Surfacing and Contracting Services Limited2011
- Unique Utilities Ltd2025
- Aj Commissioning Ltd2024
All civil engineering contractors in Porth · All trades in Porth · Civil engineering across the UK
Frequently asked questions
When are NJ Rail Ltd's accounts due?
NJ Rail 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 NJ Rail 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 NJ Rail Ltd still trading?
NJ Rail 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 NJ Rail Ltd do?
NJ Rail Ltd is registered under Construction of railways and underground railways (SIC 42120).
How old is NJ Rail Ltd?
NJ Rail Ltd was incorporated on 23 June 2024, 2 years ago.
What is the penalty if NJ Rail 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 NJ Rail 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.