- Companies
- Plumbers and heating engineers
- Worthing
- Relentless Mechanical Services Ltd
Relentless Mechanical Services Ltd
- Company number
- 16116567
- Incorporated
- 3 Dec 20241 year trading
- Registered office
- 27 Princess Avenue, Worthing, BN13 1BA
- Nature of business
- Plumbing, heat and air-conditioning installation
Relentless Mechanical Services Ltd is a 1-year-old private limited company registered in Worthing, company number 16116567, one of 94 plumbing and heating companies in Worthing. 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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Financial snapshot, 2025
From the balance sheet at 31 December 2025, as filed at Companies House.
Where Relentless Mechanical Services Ltd is registered
The registered office is in Worthing (BN13), in the Worthing local authority area, South East. Show BN13 1BA on a map.
Other trade companies in BN13
- Loftworks Sussex LtdBuilders
- Sylvia Build LtdBuilders
- Kem Fencing LtdInstallers
- Akn Property Developments LtdProperty developers
- Shift Air-Conditioning and Refrigeration LtdPlumbers and heating engineers
- McKinderscaffolding LimitedScaffolders
- Dags Scaffolding LtdScaffolders
- Honest Harry's LtdMotor traders
What happens if Relentless Mechanical Services 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
- 16116567
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 December 2024 (1 year ago)
- Registered office
- 27 Princess Avenue, Worthing, BN13 1BA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 2 December 2025
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Worthing
Other active plumbing and heating companies registered in Worthing.
- Revolution Heating Limited2024
- Richard Bedson Plumbing & Heating Ltd2016
- Richard Harding Plumbing and Heating Limited2001
- S I A Plumbing and Heating Services Limited2002
- S Phillips Plumbing and Heating Ltd2017
- Serene Bathrooms Ltd2019
- Sheff Plumbing & Heating Limited2014
- Shift Air-Conditioning and Refrigeration Ltd2026
All plumbing and heating companies in Worthing · All trades in Worthing · Plumbers and heating engineers across the UK
Frequently asked questions
When are Relentless Mechanical Services Ltd's accounts due?
Relentless Mechanical Services 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 Relentless Mechanical Services 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 Relentless Mechanical Services Ltd still trading?
Relentless Mechanical Services 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 Relentless Mechanical Services Ltd do?
Relentless Mechanical Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Relentless Mechanical Services Ltd?
Relentless Mechanical Services Ltd was incorporated on 3 December 2024, 1 year ago.
What is the penalty if Relentless Mechanical Services 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 Relentless Mechanical Services 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.