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- Marnon Ltd
Company profile · Electricians
Marnon Ltd
Marnon Ltd is a 7-year-old private limited company registered in Liverpool, company number 12138071, one of 489 electrical contractors in Liverpool. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 August 2025, as filed at Companies House.
Marnon Ltd over the years
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 £11K (-75.6%) on the year before, to £3,598.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- Current assets of £4,242 against £2,331 owed within a year: 1.8 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £3,598 | £2,459 | £4,242 | £2,331 | 1 |
| 31 Aug 2024 | £15K | £20K | £20K | £9,552 | 1 |
| 31 Aug 2023 | £7,028 | £725 | £988 | £1,189 | 1 |
| 31 Aug 2022 | £8,043 | £471 | £471 | £2,427 | 0 |
| 31 Aug 2021 | £13K | £6,706 | £6,589 | 0 | |
| 31 Aug 2020 | £1,952 | £1,699 | £3,438 | 0 |
Where Marnon Ltd is registered
The registered office is in Liverpool (L15), in the Liverpool local authority area, North West. Show L15 1HL on a map.
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What happens if Marnon 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 12138071
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 August 2019 (7 years ago)
- Registered office
- 10 Picton Grove, Liverpool, L15 1HL
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220) - Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 4 August 2026
- Previous names
- A&R Boiler Repair Merseyside Ltd (until 4 Dec 2019)
Marnon Limited (until 9 Sep 2019)
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 Liverpool
Other active electrical contractors registered in Liverpool.
- Marshall Electrical Installations Ltd2023
- Master Installs Ltd2024
- Mattas Electrical Limited2024
- Maz Electrical & Construction Ltd2011
- Mblelectrical Ltd2023
- MC Davies Electrical Ltd2018
- McDuff Electrics Ltd2015
- MCP Electrical Ltd2020
All electrical contractors in Liverpool · All trades in Liverpool · Electricians across the UK
Frequently asked questions
When are Marnon Ltd's accounts due?
Marnon Ltd's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is Marnon Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Marnon Ltd still trading?
Marnon 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 Marnon Ltd do?
Marnon Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Marnon Ltd?
Marnon Ltd was incorporated on 5 August 2019, 7 years ago.
What is the penalty if Marnon 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 Marnon 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.