- Companies
- Electricians
- Merthyr Tydfil
- GS Williams Ltd
GS Williams Ltd
- Company number
- 16645998
- Incorporated
- 12 Aug 20251 year trading
- Registered office
- 141 Heolgerrig, Merthyr Tydfil, CF48 1RE
- Nature of business
- Electrical installation
GS Williams Ltd is a 1-year-old private limited company registered in Merthyr Tydfil, company number 16645998, one of 37 electrical contractors in Merthyr Tydfil. Its next accounts are due at Companies House on 12 May 2027, and its first CT600 is due at HMRC on 11 August 2027.
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 GS Williams Ltd is registered
The registered office is in Merthyr Tydfil (CF48), in the Merthyr Tydfil local authority area, Wales. Show CF48 1RE on a map.
Other trade companies in CF48
- Valley Roofing Building & Carpentry LimitedRoofers
- Ajl Rail/Civil Engineering LtdCivil engineering
- M&K Valeting LtdCleaning companies
- Mdgroundworks LtdGroundworks and demolition
- Craig Lloyd Groundworks LtdCivil engineering
- Noarc Electrical LtdElectricians
- Elt Brickwork LimitedBuilders
- JBH Decorating LimitedPainters and decorators
Also registered at this address
1 other company uses the same registered office as GS Williams Ltd.
What happens if GS Williams 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 12 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 13 May 2027 to 12 Jun 2027 | £150 |
| 1 to 3 months late | 13 Jun 2027 to 12 Aug 2027 | £375 |
| 3 to 6 months late | 13 Aug 2027 to 12 Nov 2027 | £750 |
| More than 6 months late | From 13 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 16645998
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 August 2025 (1 year ago)
- Registered office
- 141 Heolgerrig, Merthyr Tydfil, CF48 1RE
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 11 August 2026
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 Merthyr Tydfil
Other active electrical contractors registered in Merthyr Tydfil.
- Hze Solutions Ltd2026
- Ir Energy Holdings Limited2024
- K.S.Regan Electrical Limited2017
- Kaagrace Limited2014
- LB Systems Electrical Ltd2025
- Lightning Solutions (Wales) Limited2013
- M.R.S Electrical Services Ltd2023
- Mate Electrical and Renewables Ltd2022
All electrical contractors in Merthyr Tydfil · All trades in Merthyr Tydfil · Electricians across the UK
Frequently asked questions
When are GS Williams Ltd's accounts due?
GS Williams Ltd's next accounts are due at Companies House by 12 May 2027 (in 212 days), covering the period to 31 August 2026.
When is GS Williams Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 11 August 2026, due by 11 August 2027, and one for the period to 31 August 2026, due by 31 August 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is GS Williams Ltd still trading?
GS Williams 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 GS Williams Ltd do?
GS Williams Ltd is registered under Electrical installation (SIC 43210).
How old is GS Williams Ltd?
GS Williams Ltd was incorporated on 12 August 2025, 1 year ago.
What is the penalty if GS Williams 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 GS Williams 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.