- Companies
- Civil engineering
- Swansea
- Sparkz Electric Ltd
Sparkz Electric Ltd
- Company number
- 15415122
- Incorporated
- 16 Jan 20242 years trading
- Registered office
- 14 Rowan Close, Killay, Swansea, SA2 7DW
- Nature of business
- Construction of utility projects for electricity and telecommunications; Electrical installation
Sparkz Electric Ltd is a 2-year-old private limited company registered in Swansea, company number 15415122, one of 71 civil engineering contractors in Swansea. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where Sparkz Electric Ltd is registered
The registered office is in Swansea (SA2), in the Swansea local authority area, Wales. Show SA2 7DW on a map.
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What happens if Sparkz Electric 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 15415122
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 January 2024 (2 years ago)
- Registered office
- 14 Rowan Close, Killay, Swansea, SA2 7DW
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
Electrical installation (SIC 43210) - Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 15 January 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 Swansea
Other active civil engineering contractors registered in Swansea.
- Swansea Design & Build Construction Ltd2014
- Syncro Civils Ltd2019
- T&M Group Ltd2007
- Tanners Welding Services Limited2026
- Total Technology Design Partnership Limited2000
- Trident Infrastructure Projects Ltd2026
- WCJ Utilities Limited2019
- Western Cape Construction & Utilities Group Ltd2020
All civil engineering contractors in Swansea · All trades in Swansea · Civil engineering across the UK
Frequently asked questions
When are Sparkz Electric Ltd's accounts due?
Sparkz Electric Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Sparkz Electric Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Sparkz Electric Ltd still trading?
Sparkz Electric 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 Sparkz Electric Ltd do?
Sparkz Electric Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220); Electrical installation (SIC 43210).
How old is Sparkz Electric Ltd?
Sparkz Electric Ltd was incorporated on 16 January 2024, 2 years ago.
What is the penalty if Sparkz Electric 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 Sparkz Electric 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.