- Companies
- Civil engineering
- Warminster
- Smartsignalling Limited
Smartsignalling Limited
- Company number
- 16942849
- Incorporated
- 5 Jan 2026
- Registered office
- 16 Westfields, Zeals, Warminster, BA12 6PW
- Nature of business
- Construction of railways and underground railways
Smartsignalling Limited is a newly incorporated private limited company registered in Warminster, company number 16942849, one of the UK's civil engineering contractors. Its next accounts are due at Companies House on 5 October 2027, and its first CT600 is due at HMRC on 4 January 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 Smartsignalling Limited is registered
The registered office is in Warminster (BA12), in the Wiltshire local authority area, South West. Show BA12 6PW on a map.
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What happens if Smartsignalling Limited 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 5 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 6 Oct 2027 to 5 Nov 2027 | £150 |
| 1 to 3 months late | 6 Nov 2027 to 5 Jan 2028 | £375 |
| 3 to 6 months late | 6 Jan 2028 to 5 Apr 2028 | £750 |
| More than 6 months late | From 6 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 16942849
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 January 2026
- Registered office
- 16 Westfields, Zeals, Warminster, BA12 6PW
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 31 January (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 Warminster
Other active civil engineering contractors registered in Warminster.
All civil engineering contractors in Warminster · All trades in Warminster · Civil engineering across the UK
Frequently asked questions
When are Smartsignalling Limited's accounts due?
Smartsignalling Limited's next accounts are due at Companies House by 5 October 2027 (in 358 days), covering the period to 31 January 2027.
When is Smartsignalling Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 4 January 2027, due by 4 January 2028, and one for the period to 31 January 2027, due by 31 January 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Smartsignalling Limited still trading?
Smartsignalling Limited 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 Smartsignalling Limited do?
Smartsignalling Limited is registered under Construction of railways and underground railways (SIC 42120).
How old is Smartsignalling Limited?
Smartsignalling Limited was incorporated on 5 January 2026, less than a year ago.
What is the penalty if Smartsignalling Limited 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 Smartsignalling Limited 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.