- Companies
- Electricians
- London
- Protec Energy Ltd
Protec Energy Ltd
- Company number
- 12675401
- Incorporated
- 16 Jun 20206 years trading
- Registered office
- Unit A433, 4-6 Greatorex Street, London, E1 5NF
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Buying and selling of own real estate; Other service activities n.e.c.
Protec Energy Ltd is a 6-year-old private limited company registered in London, company number 12675401, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £463 (-3.2%) on the year before, to £14K.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £10K against £14K owed within a year: 0.8 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £14K | £10K | £14K | 2 | |
| 30 Jun 2024 | £14K | £8,021 | £10K | £26K | 2 |
| 30 Jun 2023 | £25K | £21K | £21K | £29K | 2 |
| 30 Jun 2022 | £20K | £31K | £31K | £27K | 2 |
| 30 Jun 2021 | £10K | £10K | £14K | £3,299 | 2 |
Where Protec Energy Ltd is registered
The registered office is in London (E1), in the Tower Hamlets local authority area, London. Show E1 5NF on a map.
Other trade companies in E1
- Safa Builds LtdElectricians
- Ribh LtdElectricians
- Tyres on Call LtdMechanics and garages
- Hrautosources LtdMotor traders
- Choiceworks LimitedInstallers
- E.M Construction London LtdBuilders
- Qubic Maintenance LtdSpecialist contractors
- Moovin Transport LtdMechanics and garages
What happens if Protec Energy 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 12675401
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 June 2020 (6 years ago)
- Registered office
- Unit A433, 4-6 Greatorex Street, London, E1 5NF
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Buying and selling of own real estate (SIC 68100)
Other service activities n.e.c. (SIC 96090) - Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 15 June 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 London
Other active electrical contractors registered in London.
- Protec(UK) Ltd2025
- Protech Electrics Service Ltd2022
- Proton Contractor Ltd2018
- Proton Electrics Ltd2023
- Providence Maintenance Ltd2023
- Provision Energy Ltd2025
- Prowago Ltd2016
- PS Electrical Ltd2023
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Protec Energy Ltd's accounts due?
Protec Energy Ltd's next accounts are due at Companies House by 31 March 2027 (in 170 days), covering the period to 30 June 2026.
When is Protec Energy Ltd's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Protec Energy Ltd still trading?
Protec Energy 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 Protec Energy Ltd do?
Protec Energy Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Buying and selling of own real estate (SIC 68100); Other service activities n.e.c. (SIC 96090).
How old is Protec Energy Ltd?
Protec Energy Ltd was incorporated on 16 June 2020, 6 years ago.
What is the penalty if Protec Energy 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 Protec Energy 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.