- Companies
- Electricians
- Southampton
- KSB Electrical South Ltd
KSB Electrical South Ltd
- Company number
- 16154105
- Incorporated
- 28 Dec 20241 year trading
- Registered office
- 125 Bellemoor Road, Southampton, SO15 7QW
- Nature of business
- Electrical installation
KSB Electrical South Ltd is a 1-year-old private limited company registered in Southampton, company number 16154105, one of 342 electrical contractors in Southampton. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for KSB Electrical South LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Financial snapshot, 2025
From the balance sheet at 31 December 2025, as filed at Companies House.
Where KSB Electrical South Ltd is registered
The registered office is in Southampton (SO15), in the Southampton local authority area, South East. Show SO15 7QW on a map.
Other trade companies in SO15
- Enginetek Marine LimitedMachinery repair and installation
- The DPF Guy LtdMechanics and garages
- Redbridge Accident Repair LtdMechanics and garages
- Mahakali Engineer Services LtdMachinery repair and installation
- Genuinecarpartsuk LtdMotor traders
- MK Cars & Parts LtdMotor traders
- SMS Building LimitedFinishing trades
- Sonridge Building Group LtdCivil engineering
Also registered at this address
1 other company uses the same registered office as KSB Electrical South Ltd.
- SSB Gas LimitedPlumbers and heating engineers
What happens if KSB Electrical South 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 16154105
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 December 2024 (1 year ago)
- Registered office
- 125 Bellemoor Road, Southampton, SO15 7QW
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 27 December 2025
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 Southampton
Other active electrical contractors registered in Southampton.
- KTG Installations Ltd2014
- Lambertlux Electrical Solutions Limited2022
- Laverick's Electrical Ltd2019
- Lee Hayward Ltd2007
- Lexa Group Limited2016
- Lightning Electrical Limited2025
- LJH Building Services Ltd2022
- Loc-8 Electrical Limited2020
All electrical contractors in Southampton · All trades in Southampton · Electricians across the UK
Frequently asked questions
When are KSB Electrical South Ltd's accounts due?
KSB Electrical South Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is KSB Electrical South Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is KSB Electrical South Ltd still trading?
KSB Electrical South 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 KSB Electrical South Ltd do?
KSB Electrical South Ltd is registered under Electrical installation (SIC 43210).
How old is KSB Electrical South Ltd?
KSB Electrical South Ltd was incorporated on 28 December 2024, 1 year ago.
What is the penalty if KSB Electrical South 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 KSB Electrical South 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.