- Companies
- Plumbers and heating engineers
- Wick
- A & J Mackay Plumbing & Heating Ltd
A & J Mackay Plumbing & Heating Ltd
- Company number
- SC336614
- Incorporated
- 23 Jan 200818 years trading
- Registered office
- Langmay House Bridgend, Watten, Wick, Caithness, KW1 5UH
- Nature of business
- Plumbing, heat and air-conditioning installation
A & J Mackay Plumbing & Heating Ltd is a 18-year-old private limited company registered in Wick, company number SC336614, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 2028.
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 down £3,231 (-27.5%) on the year before, to £8,515.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £20K against £34K owed within a year: 0.6 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | £8,515 | £20K | £34K | 1 | |
| 31 Jan 2025 | £12K | £19K | £33K | 1 | |
| 31 Jan 2024 | £472 | £15K | £24K | 1 | |
| 31 Jan 2023 | -£1,788 | £23K | £31K | 1 | |
| 31 Jan 2022 | -£8,289 | £30K | £46K | 1 | |
| 31 Jan 2021 | -£16K | £21K | £45K | 1 | |
| 31 Jan 2020 | -£14K | £26K | £48K | 2 | |
| 31 Jan 2019 | -£8,294 | £24K | £40K | ||
| 31 Jan 2018 | £1,466 | £24K | £31K | ||
| 31 Jan 2017 | -£848 | £18K | £29K |
Where A & J Mackay Plumbing & Heating Ltd is registered
The registered office is in Wick (KW1), in the Highland local authority area, Scotland. Show KW1 5UH on a map.
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What happens if A & J Mackay Plumbing & Heating 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 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- SC336614
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 January 2008 (18 years ago)
- Registered office
- Langmay House Bridgend, Watten, Wick, Caithness, KW1 5UH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 26 September 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 Wick
Other active plumbing and heating companies registered in Wick.
All plumbing and heating companies in Wick · All trades in Wick · Plumbers and heating engineers across the UK
Frequently asked questions
When are A & J Mackay Plumbing & Heating Ltd's accounts due?
A & J Mackay Plumbing & Heating Ltd's next accounts are due at Companies House by 31 October 2027 (in 383 days), covering the period to 31 January 2027.
When is A & J Mackay Plumbing & Heating Ltd's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is A & J Mackay Plumbing & Heating Ltd still trading?
A & J Mackay Plumbing & Heating Ltd is listed as active on the Companies House register (checked 13 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 A & J Mackay Plumbing & Heating Ltd do?
A & J Mackay Plumbing & Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is A & J Mackay Plumbing & Heating Ltd?
A & J Mackay Plumbing & Heating Ltd was incorporated on 23 January 2008, 18 years ago.
What is the penalty if A & J Mackay Plumbing & Heating 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 A & J Mackay Plumbing & Heating Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.