- Companies
- Cleaning companies
- Cardiff
- FM1 Security Limited
FM1 Security Limited
- Company number
- 15746586
- Incorporated
- 28 May 20242 years trading
- Registered office
- PO Box 4385, 15746586 - Companies House Default Address, Cardiff, CF14 8LH
- Nature of business
- General cleaning of buildings
FM1 Security Limited is a 2-year-old private limited company registered in Cardiff, company number 15746586, one of 213 cleaning companies in Cardiff. Companies House shows its accounts as overdue: they were due on 28 February 2026.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
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Where FM1 Security Limited is registered
The registered office is in Cardiff (CF14), in the Caerphilly local authority area, Wales. Show CF14 8LH on a map.
Other trade companies in CF14
- Velren Group LtdProperty developers
- Premierroofcare LtdRoofers
- JLG Groundworks LtdCleaning companies
- Tidyvibz LtdCleaning companies
- Ayyappa MTD LtdBuilders
- KM Phoenix Pond, Garden & General Maintenance LtdLandscapers and gardeners
- Eco Green Property Service LtdFinishing trades
- S and J Accident Repairs LtdPainters and decorators
What happens if FM1 Security Limited files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2026 to 31 Mar 2026 | £150 |
| 1 to 3 months late | 1 Apr 2026 to 31 May 2026 | £375 |
| 3 to 6 months late | 1 Jun 2026 to 31 Aug 2026 | £750 |
| More than 6 months late | From 1 Sep 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2026 | £200 |
| 3 months late | 31 Aug 2026 | another £200 |
| 6 months late | 30 Nov 2026 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 2027 | 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
- 15746586
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 May 2024 (2 years ago)
- Registered office
- PO Box 4385, 15746586 - Companies House Default Address, Cardiff, CF14 8LH
- Nature of business
- General cleaning of buildings (SIC 81210)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 27 May 2025
- Previous names
- Se Security Maintenance and Services Ltd (until 18 Feb 2026)
Se Maintenance and Services Ltd (until 10 Jul 2025)
Filing notes for cleaning companies
Cleaning companies are often staff-heavy, so wages, pension contributions and the employment allowance all show up in the accounts.
Similar companies in Cardiff
Other active cleaning companies registered in Cardiff.
- G9 Detailing Ltd2026
- Genesis Commercial & Industrial Cleaning Ltd2015
- Gibson Cleaning Services Limited2006
- GJ Property Cleaning Ltd2026
- Gleam & Sheen Auto Care Ltd2025
- Gogleam Ltd2026
- Green Machine Cardiff Limited2024
- Gutter Cleaning Cardiff Ltd2022
All cleaning companies in Cardiff · All trades in Cardiff · Cleaning companies across the UK
Frequently asked questions
When are FM1 Security Limited's accounts due?
FM1 Security Limited's accounts were due at Companies House on 28 February 2026 and the register shows them as overdue.
When is FM1 Security Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 27 May 2025, due by 27 May 2026, and one for the period to 31 May 2025, due by 31 May 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is FM1 Security Limited still trading?
FM1 Security Limited is listed as active on the Companies House register (checked 12 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 FM1 Security Limited do?
FM1 Security Limited is registered under General cleaning of buildings (SIC 81210).
How old is FM1 Security Limited?
FM1 Security Limited was incorporated on 28 May 2024, 2 years ago.
What is the penalty if FM1 Security 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 FM1 Security Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.