- Companies
- Machinery repair and installation
- Plymouth
- Octagon Marine Limited
Octagon Marine Limited
- Company number
- 13482789
- Incorporated
- 29 Jun 20215 years trading
- Registered office
- Unit 1 Ocean Building, Queen Anne's Battery, Plymouth, Devon, PL4 0LP
- Nature of business
- Installation of industrial machinery and equipment
Octagon Marine Limited is a 5-year-old private limited company registered in Plymouth, company number 13482789, one of 98 machinery repair and installation companies 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 up £4,574 (+38%) on the year before, to -£7,452.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £33K against £79K owed within a year: 0.4 times cover.
- 3 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 |
|---|---|---|---|---|---|
| 31 Dec 2025 | -£7,452 | £6,949 | £33K | £79K | 3 |
| 31 Dec 2024 | -£12K | £33K | £94K | 3 | |
| 31 Dec 2023 | £13K | £34K | £97K | 3 | |
| 31 Dec 2022 | £3,061 | £25K | £91K | 3 | |
| 31 Dec 2021 | £100 | £50K | £46K | 0 |
Where Octagon Marine Limited is registered
The registered office is in Plymouth (PL4), in the Plymouth local authority area, South West. Show PL4 0LP on a map.
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What happens if Octagon Marine Limited 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
- 13482789
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 June 2021 (5 years ago)
- Registered office
- Unit 1 Ocean Building, Queen Anne's Battery, Plymouth, Devon, PL4 0LP
- Nature of business
- Installation of industrial machinery and equipment (SIC 33200)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 2 June 2026
- Previous names
- Offshore Yacht Solutions Limited (until 14 Dec 2021)
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in Plymouth
Other active machinery repair and installation companies registered in Plymouth.
- Offshore Yacht Solutions Limited2020
- Pete's Gas Limited2019
- Pipe Seal Ltd.2021
- Plymouth Aerial Solutions Ltd2011
- Plymouth Boatyard and Marina Ltd.2007
- Plymouth Sparky Limited2019
- Porsham Close Belliver MOT Centre Ltd2013
- PR Nautica Limited2006
All machinery repair and installation companies in Plymouth · All trades in Plymouth · Machinery repair and installation across the UK
Frequently asked questions
When are Octagon Marine Limited's accounts due?
Octagon Marine Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Octagon Marine Limited'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 Octagon Marine Limited still trading?
Octagon Marine Limited 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 Octagon Marine Limited do?
Octagon Marine Limited is registered under Installation of industrial machinery and equipment (SIC 33200).
How old is Octagon Marine Limited?
Octagon Marine Limited was incorporated on 29 June 2021, 5 years ago.
What is the penalty if Octagon Marine Limited 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 Octagon Marine Limited 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.