- Companies
- Electricians
- Plymouth
- Quantum Electrical SW Ltd
Quantum Electrical SW Ltd
- Company number
- 15337922
- Incorporated
- 9 Dec 20232 years trading
- Registered office
- 33 Mary Seacole Road, Plymouth, PL1 3JY
- Nature of business
- Electrical installation
Quantum Electrical SW Ltd is a 2-year-old private limited company registered in Plymouth, company number 15337922, one of 124 electrical contractors in Plymouth. 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.
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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 £34K (-63%) on the year before, to £20K.
- Current assets of £26K against £7,446 owed within a year: 3.6 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £20K | £24K | £26K | £7,446 | 0 |
| 31 Dec 2024 | £53K | £87K | £116K | £64K | 0 |
Where Quantum Electrical SW Ltd is registered
The registered office is in Plymouth (PL1), in the Plymouth local authority area, South West. Show PL1 3JY on a map.
Other trade companies in PL1
- Clearway Drives & Patios LtdLandscapers and gardeners
- Techshopplymouth LtdRepair services
- Plymouth Garage LtdMechanics and garages
- Westmore Construction (South West) LtdProperty developers
- SW MOT LtdMechanics and garages
- SW Garage LtdMechanics and garages
- Mitchell Electrical (SW) LtdElectricians
- Mallu S Wheels UK LtdMotor traders
Shared registered office
48 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Quantum Electrical SW 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
- 15337922
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 December 2023 (2 years ago)
- Registered office
- 33 Mary Seacole Road, Plymouth, PL1 3JY
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 8 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 Plymouth
Other active electrical contractors registered in Plymouth.
- R T J Martin Limited1996
- R.D. Jukes & Co. Limited1974
- Redwire Technical Ltd2026
- RJB Solutions (South West) Limited2007
- Rowe Electrical Engineers Limited2009
- RT Electrical Engineers Ltd2026
- Rtes Electrical Ltd2026
- S P Harvey Electrical Limited2000
All electrical contractors in Plymouth · All trades in Plymouth · Electricians across the UK
Frequently asked questions
When are Quantum Electrical SW Ltd's accounts due?
Quantum Electrical SW Ltd's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is Quantum Electrical SW 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 Quantum Electrical SW Ltd still trading?
Quantum Electrical SW 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 Quantum Electrical SW Ltd do?
Quantum Electrical SW Ltd is registered under Electrical installation (SIC 43210).
How old is Quantum Electrical SW Ltd?
Quantum Electrical SW Ltd was incorporated on 9 December 2023, 2 years ago.
What is the penalty if Quantum Electrical SW 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 Quantum Electrical SW 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.