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- D.Thomas Electrical Cyf
Company profile · Electricians
D.Thomas Electrical Cyf
D.Thomas Electrical Cyf is a newly incorporated private limited company registered in Porthmadog, company number 17385843, one of 8 electrical contractors in Porthmadog. Its next accounts are due at Companies House on 6 May 2028, and its first CT600 is due at HMRC on 5 August 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.
Is this your company?
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Where D.Thomas Electrical Cyf is registered
The registered office is in Porthmadog (LL49), in the Gwynedd local authority area, Wales. Show LL49 9AP on a map.
Other trade companies in LL49
- N Commercial LtdMotor traders
- Bricsan CyfProperty developers
- White Diamond Windows LtdGlaziers
- Porthmadog No1 Hand Car Wash LtdCleaning companies
- Dragon Drone Surveys & Inspections LimitedGroundworks and demolition
- Cu Power LtdMachinery repair and installation
- Carwyn Ap Plymio A Gwresogi CyfPlumbers and heating engineers
- Llyn Access Scaffolding LtdScaffolders
Also registered at this address
13 other companies use the same registered office as D.Thomas Electrical Cyf.
- B & S Siting LimitedInstallers
- Bricsan CyfProperty developers
- Carwyn Ap Plymio A Gwresogi CyfPlumbers and heating engineers
- E H A'i Fab Ynni Adnewyddadol & Trydanol CyfElectricians
- E.Jones Williams and Son LimitedProperty developers
- Elis Llywelyn Williams CyfPlumbers and heating engineers
- Ffenestri Dwyfor Windows CyfGlaziers
- G Jones Contracts LimitedSpecialist contractors
- N Commercial LtdMotor traders
- North West Wales Electrical LtdElectricians
- R J Jones Plumbing & Heating LtdPlumbers and heating engineers
- TK Resin Driveways LtdSpecialist contractors
- White Diamond Windows LtdGlaziers
What happens if D.Thomas Electrical Cyf 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 6 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 7 May 2028 to 6 Jun 2028 | £150 |
| 1 to 3 months late | 7 Jun 2028 to 6 Aug 2028 | £375 |
| 3 to 6 months late | 7 Aug 2028 to 6 Nov 2028 | £750 |
| More than 6 months late | From 7 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17385843
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 August 2026
- Registered office
- ST. Davids Building, Lombard Street, Porthmadog, LL49 9AP
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Porthmadog
Other active electrical contractors registered in Porthmadog.
- E H A'i Fab Ynni Adnewyddadol & Trydanol Cyf2024
- Gareth Griffiths (Trydanwr) Cyf2003
- North West Wales Electrical Ltd2022
- O R Electrical Limited2017
- Tony Rowlands Electrical Ltd2019
- A. J Brown Electrical Contracting Ltd2013
- Cambrian Electrical (Gwynedd) Ltd2019
All electrical contractors in Porthmadog · All trades in Porthmadog · Electricians across the UK
Frequently asked questions
When are D.Thomas Electrical Cyf's accounts due?
D.Thomas Electrical Cyf's next accounts are due at Companies House by 6 May 2028 (in 572 days), covering the period to 31 August 2027.
When is D.Thomas Electrical Cyf's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 5 August 2027, due by 5 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is D.Thomas Electrical Cyf still trading?
D.Thomas Electrical Cyf 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 D.Thomas Electrical Cyf do?
D.Thomas Electrical Cyf is registered under Electrical installation (SIC 43210).
How old is D.Thomas Electrical Cyf?
D.Thomas Electrical Cyf was incorporated on 6 August 2026, less than a year ago.
What is the penalty if D.Thomas Electrical Cyf 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 D.Thomas Electrical Cyf 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.