- Companies
- Machinery repair and installation
- London
- Rockarch Limited
Rockarch Limited
- Company number
- 16095837
- Incorporated
- 22 Nov 20241 year trading
- Registered office
- 79 Hereford Road, London, W2 5BB
- Nature of business
- Repair of electronic and optical equipment
Rockarch Limited is a 1-year-old private limited company registered in London, company number 16095837, one of 1,743 machinery repair and installation companies in London. Companies House shows its accounts as overdue: they were due on 22 August 2026.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Rockarch Limited is registered
The registered office is in London (W2), in the Westminster local authority area, London. Show W2 5BB on a map.
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What happens if Rockarch Limited files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 23 Aug 2026 to 22 Sep 2026 | £150 |
| 1 to 3 months late | 23 Sep 2026 to 22 Nov 2026 | £375 |
| 3 to 6 months late | 23 Nov 2026 to 22 Feb 2027 | £750 |
| More than 6 months late | From 23 Feb 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2026 | £200 |
| 3 months late | 28 Feb 2027 | another £200 |
| 6 months late | 30 May 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 2027 | 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
- 16095837
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 November 2024 (1 year ago)
- Registered office
- 79 Hereford Road, London, W2 5BB
- Nature of business
- Repair of electronic and optical equipment (SIC 33130)
- Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 31 October 2025
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 London
Other active machinery repair and installation companies registered in London.
- Roe Visual UK Ltd2022
- Rohati Ltd2024
- Rolacs Maritime Limited2021
- Roman Bikes Limited2024
- Romans Repairs Ltd2022
- Romiair Ltd2026
- Ronigo Renewables Solutions Ltd2025
- Ronson Catering Equipment Services Limited2009
All machinery repair and installation companies in London · All trades in London · Machinery repair and installation across the UK
Frequently asked questions
When are Rockarch Limited's accounts due?
Rockarch Limited's accounts were due at Companies House on 22 August 2026 and the register shows them as overdue.
When is Rockarch Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 21 November 2025, due by 21 November 2026, and one for the period to 30 November 2025, due by 30 November 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is Rockarch Limited still trading?
Rockarch Limited is listed as active on the Companies House register (checked 12 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 Rockarch Limited do?
Rockarch Limited is registered under Repair of electronic and optical equipment (SIC 33130).
How old is Rockarch Limited?
Rockarch Limited was incorporated on 22 November 2024, 1 year ago.
What is the penalty if Rockarch 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 Rockarch Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.