- Companies
- Electricians
- Loanhead
- Mainphase Electrical Ltd
Mainphase Electrical Ltd
- Company number
- SC758245
- Incorporated
- 9 Feb 20233 years trading
- Registered office
- Eh20 Business Centre Bilston Glen Industrial Estate, 6 Dryden Road, Loanhead, Midlothian, EH20 9LZ
- Nature of business
- Electrical installation
Mainphase Electrical Ltd is a 3-year-old private limited company registered in Loanhead, company number SC758245, one of 14 electrical contractors in Loanhead. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 up £51K (+71.4%) on the year before, to £122K.
- Current assets of £437K against £295K owed within a year: 1.5 times cover.
- 17 employees on average, up from 12 the year before.
- Balance sheets on record for 3 years, 2024 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £122K | £199K | £437K | £295K | 17 |
| 31 Mar 2025 | £71K | £190K | £327K | £244K | 12 |
| 31 Mar 2024 | £21K | £59K | £145K | £134K | 5 |
Where Mainphase Electrical Ltd is registered
The registered office is in Loanhead (EH20), in the Midlothian local authority area, Scotland. Show EH20 9LZ on a map.
Other trade companies in EH20
- Green Marine Service LtdSpecialist contractors
- The Garage Conversion Company Scotland LtdFinishing trades
- Edinburgh Roof Masters LtdRoofers
- VM Imagined LimitedJoiners and carpenters
- Glenriver Interiors LtdRepair services
- Autotech Edinburgh LimitedMechanics and garages
- G.D. Mills Plumbing & Heating LtdPlumbers and heating engineers
- Sherbrook Construction LtdBuilders
What happens if Mainphase Electrical 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- SC758245
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 February 2023 (3 years ago)
- Registered office
- Eh20 Business Centre Bilston Glen Industrial Estate, 6 Dryden Road, Loanhead, Midlothian, EH20 9LZ
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 8 February 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 Loanhead
Other active electrical contractors registered in Loanhead.
- Napier Contracts Limited2003
- Neil Milligan Electrical Ltd2014
- Powersource Electrical (Scot) Ltd2022
- Ross Johnston Electrical Services Limited2016
- Sinclair Scott Limited1986
- Sy Engineering Ltd2025
- Arr-Dee Electrical Ltd.2011
- Calec Ltd2022
All electrical contractors in Loanhead · All trades in Loanhead · Electricians across the UK
Frequently asked questions
When are Mainphase Electrical Ltd's accounts due?
Mainphase Electrical Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Mainphase Electrical Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Mainphase Electrical Ltd still trading?
Mainphase Electrical 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 Mainphase Electrical Ltd do?
Mainphase Electrical Ltd is registered under Electrical installation (SIC 43210).
How old is Mainphase Electrical Ltd?
Mainphase Electrical Ltd was incorporated on 9 February 2023, 3 years ago.
What is the penalty if Mainphase Electrical 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 Mainphase Electrical 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.