- Companies
- Plumbers and heating engineers
- Doncaster
- Martec Cooling Ltd
Martec Cooling Ltd
- Company number
- 17291133
- Incorporated
- 20 Jun 2026
- Registered office
- 42 Moss Road, Askern, Doncaster, DN6 0DD
- Nature of business
- Plumbing, heat and air-conditioning installation
Martec Cooling Ltd is a newly incorporated private limited company registered in Doncaster, company number 17291133, one of 150 plumbing and heating companies in Doncaster. Its next accounts are due at Companies House on 20 March 2028, and its first CT600 is due at HMRC on 19 June 2028.
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.
Is this your company?
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Where Martec Cooling Ltd is registered
The registered office is in Doncaster (DN6), in the Doncaster local authority area, Yorkshire and The Humber. Show DN6 0DD on a map.
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What happens if Martec Cooling 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 20 March 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 Mar 2028 to 20 Apr 2028 | £150 |
| 1 to 3 months late | 21 Apr 2028 to 20 Jun 2028 | £375 |
| 3 to 6 months late | 21 Jun 2028 to 20 Sep 2028 | £750 |
| More than 6 months late | From 21 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2028 | £200 |
| 3 months late | 30 Sep 2028 | another £200 |
| 6 months late | 30 Dec 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 17291133
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 June 2026
- Registered office
- 42 Moss Road, Askern, Doncaster, DN6 0DD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- No accounts filed yet
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 Doncaster
Other active plumbing and heating companies registered in Doncaster.
- Masons Plumbing & Heating Contractors Ltd2019
- MBS Plumbing and Heating Limited2013
- MCR Mobility Solutions Limited2025
- MG Group Ltd2025
- Miw Plumbing and Heating Ltd2020
- MJL Plumbgas Limited2024
- My Heating Solutions Ltd2024
- Neil Day Plumbing and Heating Limited2013
All plumbing and heating companies in Doncaster · All trades in Doncaster · Plumbers and heating engineers across the UK
Frequently asked questions
When are Martec Cooling Ltd's accounts due?
Martec Cooling Ltd's next accounts are due at Companies House by 20 March 2028 (in 524 days), covering the period to 30 June 2027.
When is Martec Cooling Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 19 June 2027, due by 19 June 2028, and one for the period to 30 June 2027, due by 30 June 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Martec Cooling Ltd still trading?
Martec Cooling 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 Martec Cooling Ltd do?
Martec Cooling Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Martec Cooling Ltd?
Martec Cooling Ltd was incorporated on 20 June 2026, less than a year ago.
What is the penalty if Martec Cooling 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 Martec Cooling 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.