- Companies
- Electricians
- Portsmouth
- JMS Southern Ltd
JMS Southern Ltd
- Company number
- 17404350
- Incorporated
- 17 Aug 2026
- Registered office
- 41-42 Trafalgar House, 223 Southampton Road, Portsmouth, Hampshire, PO6 4PY
- Nature of business
- Electrical installation
JMS Southern Ltd is a newly incorporated private limited company registered in Portsmouth, company number 17404350, one of 148 electrical contractors in Portsmouth. Its next accounts are due at Companies House on 17 May 2028, and its first CT600 is due at HMRC on 16 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.
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Where JMS Southern Ltd is registered
The registered office is in Portsmouth (PO6), in the Portsmouth local authority area, South East. Show PO6 4PY on a map.
Other trade companies in PO6
- Bellagio Partners LtdBuilders
- Cpenw LtdMachinery repair and installation
- Marla Brickwork & Construction LtdProperty developers
- Miracles in Metal LtdMechanics and garages
- FH Fire & Electrical LtdElectricians
- Thomcore LimitedSpecialist contractors
- The Motum Group LtdSpecialist contractors
- Everfield Play & Leisure LtdSpecialist contractors
Also registered at this address
2 other companies use the same registered office as JMS Southern Ltd.
- Gastech Heating South LtdPlumbers and heating engineers
- Volt Network LtdElectricians
What happens if JMS Southern 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 17 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 18 May 2028 to 17 Jun 2028 | £150 |
| 1 to 3 months late | 18 Jun 2028 to 17 Aug 2028 | £375 |
| 3 to 6 months late | 18 Aug 2028 to 17 Nov 2028 | £750 |
| More than 6 months late | From 18 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
- 17404350
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 August 2026
- Registered office
- 41-42 Trafalgar House, 223 Southampton Road, Portsmouth, Hampshire, PO6 4PY
- 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 Portsmouth
Other active electrical contractors registered in Portsmouth.
- JSD Electrical Limited2016
- K & W Electrical Services Limited2011
- L & C Williams Limited2010
- L R Blakers Electrical Limited2017
- L.E-Electrical (South) Ltd2017
- Lang Wilson Electrical Limited2023
- Lme Energy Ltd2024
- Luma Mechanical & Electrical Ltd2025
All electrical contractors in Portsmouth · All trades in Portsmouth · Electricians across the UK
Frequently asked questions
When are JMS Southern Ltd's accounts due?
JMS Southern Ltd's next accounts are due at Companies House by 17 May 2028 (in 582 days), covering the period to 31 August 2027.
When is JMS Southern 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 16 August 2027, due by 16 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 JMS Southern Ltd still trading?
JMS Southern 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 JMS Southern Ltd do?
JMS Southern Ltd is registered under Electrical installation (SIC 43210).
How old is JMS Southern Ltd?
JMS Southern Ltd was incorporated on 17 August 2026, less than a year ago.
What is the penalty if JMS Southern 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 JMS Southern 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.