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- Cookstown
- Proline Mechanical Ltd
Company profile · Plumbers and heating engineers
Proline Mechanical Ltd
Proline Mechanical Ltd is a 3-year-old private limited company registered in Cookstown, company number NI695819, one of 12 plumbing and heating companies in Cookstown. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 March 2025, as filed at Companies House.
Proline Mechanical 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 £6,101 (-88.7%) on the year before, to £781.
- Current assets of £67K against £75K owed within a year: 0.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £781 | £67K | £75K | 2 | |
| 31 Mar 2024 | £6,882 | £63K | £68K | 2 |
Where Proline Mechanical Ltd is registered
The registered office is in Cookstown (BT80), in the Mid Ulster local authority area, Northern Ireland. Show BT80 0HW on a map.
Other trade companies in BT80
- GMB Plant & Machine Repairs LtdMachinery repair and installation
- Il Contracts LimitedCivil engineering
- Neeson Environmental LtdGroundworks and demolition
- Molloys Tyres LimitedMotor traders
- Girvan Utility Services LtdCivil engineering
- C Rafferty Construction LtdCivil engineering
- Keldev LtdProperty developers
- MD Construction and Building LtdBuilders
What happens if Proline Mechanical 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- NI695819
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 March 2023 (3 years ago)
- Registered office
- 140 Battery Road, Cookstown, Co Tyrone, BT80 0HW
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 5 June 2026
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 Cookstown
Other active plumbing and heating companies registered in Cookstown.
- Quinair Heat Recovery NI Ltd2013
- Aaa Biomass Services Ltd2018
- Aed Boiler Installations Ltd2024
- Aed Boiler Services Ltd2020
- Booth Plumbing Limited2011
- CMG Energy Services Ltd2015
- John Lynn Plumbing & Heating Ltd2014
- McAleer & McGarrity Mechanical Ltd2022
All plumbing and heating companies in Cookstown · All trades in Cookstown · Plumbers and heating engineers across the UK
Frequently asked questions
When are Proline Mechanical Ltd's accounts due?
Proline Mechanical Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Proline Mechanical Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Proline Mechanical Ltd still trading?
Proline Mechanical 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 Proline Mechanical Ltd do?
Proline Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Proline Mechanical Ltd?
Proline Mechanical Ltd was incorporated on 29 March 2023, 3 years ago.
What is the penalty if Proline Mechanical 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 Proline Mechanical 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.