- Companies
- Electricians
- Invincible Security Ltd.
Invincible Security Ltd.
- Company number
- SC221100
- Incorporated
- 10 Jul 200125 years trading
- Registered office
- Invincible House, Harbour Place, Ardrossan, Ayrshire, KA22 8BU
- Nature of business
- Electrical installation
Invincible Security Ltd. is a 25-year-old private limited company registered in Ardrossan, company number SC221100, one of the UK's electrical contractors. Its next accounts are due at Companies House on 29 February 2028, and the CT600 for the period to 31 May 2027 is due at HMRC on 31 May 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 up £13K (+160.7%) on the year before, to £22K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £196K against £86K owed within a year: 2.3 times cover.
- 12 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2026 | £22K | £196K | £86K | 12 | |
| 31 May 2025 | £8,364 | £113K | £66K | 12 | |
| 31 May 2024 | £2,545 | £134K | £90K | 10 | |
| 31 May 2023 | £2,315 | £139K | £87K | 10 | |
| 31 May 2022 | £844 | £72K | £26K | 10 | |
| 30 Nov 2020 | £11K | £72K | £83K | 0 | |
| 30 Nov 2019 | £100 | £17K | £17K | 10 | |
| 30 Nov 2018 | £324K | £468K | £116K | ||
| 30 Nov 2017 | £326K | £2,290 | £270K | £118K | |
| 30 Nov 2016 | £284K | £481 | £209K | £111K |
Public contracts won
Invincible Security Ltd. has 6 public sector contract awards on record; the ones with their own published value total £1.2M, from 2023 to 2026. Source: Contracts Finder and Find a Tender award notices. For 3 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- East Lothian Council2 awards
- Southside Housing Association Ltd1 award
- Falkirk Council1 award
- Oak Tree Housing Association Ltd1 award
- Scotland Excel1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| East Lothian Council | Portable Appliance Testing | £237K | 7 Sep 2026 |
| Southside Housing Association Ltd | Fire Safety Systems Servicing and Reactive Maintenance Contract | £157K | 20 Nov 2025 |
| Falkirk Council | Maintenance of Controlled Door Entry Systems | Ceiling, not shown | 26 Jun 2024 |
| East Lothian Council | Term Maintenance Contract for Electrical Works - Emergency Lighting Inspection and Test | £855K | 5 Feb 2024 |
| Oak Tree Housing Association Ltd | Oak Tree Housing Association Out of Hours Reactive Repairs Contractor Framework | Ceiling, not shown | 18 Sep 2023 |
| Scotland Excel | Property Maintenance and Refurbishment | Ceiling, not shown | 16 Jun 2023 |
Where Invincible Security Ltd. is registered
The registered office is in Ardrossan (KA22), in the North Ayrshire local authority area, Scotland. Show KA22 8BU on a map.
Other trade companies in KA22
- Exhicon Events Media Solution LimitedProperty developers
- Irvineteck LtdMachinery repair and installation
- Sprint Plumbing LtdPlumbers and heating engineers
- Griffin's Professional Services (Scotland) LimitedBuilders
- Bute Service Centre (Scotland) LtdMechanics and garages
- Almasri Hand Car Wash LtdCleaning companies
- McDade Plant LimitedCivil engineering
- Jeg Gal LtdInstallers
What happens if Invincible Security 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 29 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2028 to 31 Mar 2028 | £150 |
| 1 to 3 months late | 1 Apr 2028 to 31 May 2028 | £375 |
| 3 to 6 months late | 1 Jun 2028 to 31 Aug 2028 | £750 |
| More than 6 months late | From 1 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- SC221100
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 July 2001 (25 years ago)
- Registered office
- Invincible House, Harbour Place, Ardrossan, Ayrshire, KA22 8BU
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2026
- Last confirmation statement
- 1 July 2026
- Charges (mortgages)
- 2 outstanding of 2 registered
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies
Other active electrical contractors.
Frequently asked questions
When are Invincible Security Ltd.'s accounts due?
Invincible Security Ltd.'s next accounts are due at Companies House by 29 February 2028 (in 505 days), covering the period to 31 May 2027.
When is Invincible Security Ltd.'s CT600 due?
The CT600 for the period to 31 May 2027 is due at HMRC by 31 May 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2028.
Is Invincible Security Ltd. still trading?
Invincible Security 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 Invincible Security Ltd. do?
Invincible Security Ltd. is registered under Electrical installation (SIC 43210).
How old is Invincible Security Ltd.?
Invincible Security Ltd. was incorporated on 10 July 2001, 25 years ago.
Has Invincible Security Ltd. won public sector contracts?
Yes. Invincible Security Ltd. has 6 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £1.2M), most recently from East Lothian Council.
What is the penalty if Invincible Security 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 Invincible Security 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.