- Companies
- Plumbers and heating engineers
- Linwood
- Sub Ac Limited
Sub Ac Limited
- Company number
- SC487729
- Incorporated
- 29 Sep 201412 years trading
- Registered office
- C/O McCreath Accountancy Phoenix House, Ground Floor Left,, Phoenix Business Park, Linwood, Renfrewshire, PA1 2BH
- Nature of business
- Plumbing, heat and air-conditioning installation
Sub Ac Limited is a 12-year-old private limited company registered in Linwood, company number SC487729, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 2027.
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 up £1,807 (+3.2%) on the year before, to £59K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £70K against £29K owed within a year: 2.4 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £59K | £33K | £70K | £29K | 2 |
| 30 Sep 2024 | £57K | £5,924 | £62K | £32K | 2 |
| 30 Sep 2023 | £48K | £12K | £59K | £32K | 2 |
| 30 Sep 2022 | £27K | £24K | £50K | £23K | 1 |
| 30 Sep 2021 | £8,630 | £29K | £36K | £28K | 1 |
| 30 Sep 2020 | £20K | £16K | £38K | £25K | 1 |
| 30 Sep 2019 | £17K | £24K | £42K | £28K | 1 |
| 30 Sep 2018 | £27K | £10K | £53K | £27K | 1 |
| 30 Sep 2017 | £22K | £12K | £39K | £20K | 1 |
| 30 Sep 2016 | £6,028 | £15K |
Who runs and owns Sub Ac Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| C*** C*** | Director | Sep 2014 |
| J*** C*** | Director | Nov 2023 |
Person with significant control
Where Sub Ac Limited is registered
The registered office is in Linwood (PA1), in the Renfrewshire local authority area, Scotland. Show PA1 2BH on a map.
Other trade companies in PA1
- Imk Joinery LtdJoiners and carpenters
- Maid Up Home LtdCleaning companies
- Tinto Cleaning Services LimitedCleaning companies
- Paisley Electrician LtdElectricians
- Argyle Joinery LimitedJoiners and carpenters
- Wheelie Clean Bins & Driveways LtdCleaning companies
- Eidyn Projects LtdBuilders
- Fox Project Management Consultancy LtdProperty developers
Shared registered office
59 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Sub Ac Limited 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 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- SC487729
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 September 2014 (12 years ago)
- Registered office
- C/O McCreath Accountancy Phoenix House, Ground Floor Left,, Phoenix Business Park, Linwood, Renfrewshire, PA1 2BH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 10 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 Linwood
Other active plumbing and heating companies registered in Linwood.
All plumbing and heating companies in Linwood · All trades in Linwood · Plumbers and heating engineers across the UK
Frequently asked questions
When are Sub Ac Limited's accounts due?
Sub Ac Limited's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Sub Ac Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Sub Ac Limited still trading?
Sub Ac Limited 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 Sub Ac Limited do?
Sub Ac Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Sub Ac Limited?
Sub Ac Limited was incorporated on 29 September 2014, 12 years ago.
Who runs Sub Ac Limited?
Sub Ac Limited has 2 active directors, the longest-serving appointed in Sep 2014. Their names and service addresses are on the Companies House register.
Who owns Sub Ac Limited?
One person or company has significant control of Sub Ac Limited: an individual (owns 75% or more of the shares).
What is the penalty if Sub Ac 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 Sub Ac Limited 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.