- Companies
- Machinery repair and installation
- K J Security Systems Ltd
Company profile · Machinery repair and installation
K J Security Systems Ltd
K J Security Systems Ltd is a 14-year-old private limited company registered in Kenton, company number 07950829, one of the UK's machinery repair and installation companies. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for K J Security Systems LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Financial snapshot, 2025
From the balance sheet at 28 February 2025, as filed at Companies House.
K J Security Systems 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 up £11K (+31.1%) on the year before, to £45K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £61K against £15K owed within a year: 4.1 times cover.
- 1 employee 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | £45K | £61K | £15K | 1 | |
| 29 Feb 2024 | £35K | £50K | £11K | 1 | |
| 28 Feb 2023 | £30K | £45K | £11K | 1 | |
| 28 Feb 2022 | £25K | £49K | £20K | 1 | |
| 28 Feb 2021 | £29K | £37K | £7,743 | 1 | |
| 29 Feb 2020 | £25K | £31K | £34K | £8,366 | 1 |
| 28 Feb 2019 | £22K | £27K | £5,157 | 1 | |
| 28 Feb 2018 | £30K | £40K | £10K | ||
| 28 Feb 2017 | £36K | £49K | £13K | ||
| 29 Feb 2016 | £21K | £44K | £22K |
Who runs and owns K J Security Systems Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| K*** M*** | Director | Feb 2012 |
Person with significant control
Where K J Security Systems Ltd is registered
The registered office is in Kenton (HA3), in the Harrow local authority area, London. Show HA3 8TA on a map.
Other trade companies in HA3
- M&M Team Solutions LimitedCleaning companies
- Asr234 LimitedCivil engineering
- Shine Bright With NV LtdMechanics and garages
- Direct Sparks LtdMachinery repair and installation
- Meral Decoration & Maintenance LtdPainters and decorators
- Add22 LtdCivil engineering
- Floyd Cleaners LimitedCleaning companies
- Amalia&Ioana LimitedBuilders
What happens if K J Security Systems 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 07950829
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 February 2012 (14 years ago)
- Registered office
- 86 Hartford Avenue, Kenton, HA3 8TA
- Nature of business
- Repair of other equipment (SIC 33190)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 15 February 2026
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies
Other active machinery repair and installation companies.
- Spirit Integrated Systems Ltd2012
- Boss Elevators Ltd2012
- Saini Gas & Electrical Ltd2012
- First Electrical Systems Limited2012
- SMCB Consultants Ltd2012
- Bournemouth Tyres Ltd2012
- Electricians West London Ltd2012
- Caterfix Kitchens Limited2012
Machinery repair and installation across the UK
Frequently asked questions
When are K J Security Systems Ltd's accounts due?
K J Security Systems Ltd's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is K J Security Systems Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is K J Security Systems Ltd still trading?
K J Security Systems 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 K J Security Systems Ltd do?
K J Security Systems Ltd is registered under Repair of other equipment (SIC 33190).
How old is K J Security Systems Ltd?
K J Security Systems Ltd was incorporated on 15 February 2012, 14 years ago.
Who runs K J Security Systems Ltd?
K J Security Systems Ltd has 1 active director, the longest-serving appointed in Feb 2012. Their names and service addresses are on the Companies House register.
Who owns K J Security Systems Ltd?
One person or company has significant control of K J Security Systems Ltd: an individual (owns 75% or more of the shares).
What is the penalty if K J Security Systems 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 K J Security Systems 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.