- Companies
- Specialist contractors
- Erith
- Infallible Systems Limited
Infallible Systems Limited
- Company number
- 03335143
- Incorporated
- 18 Mar 199729 years trading
- Registered office
- Unit 26 Manford Industrial Estate, Manor Road, Erith, DA8 2AJ
- Nature of business
- Other specialised construction activities n.e.c.
Infallible Systems Limited is a 29-year-old private limited company registered in Erith, company number 03335143, one of 42 specialist construction companies in Erith. Its next accounts are due at Companies House on 29 June 2027, and the CT600 for the period to 29 September 2026 is due at HMRC on 29 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 down £188K (-72.9%) on the year before, to -£446K.
- Net assets rose in 2 of 7 year-on-year comparisons on record.
- Current assets of £429K against £745K owed within a year: 0.6 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | -£446K | £30K | £429K | £745K | 0 |
| 30 Sep 2024 | -£258K | £161K | £817K | £933K | 12 |
| 31 Mar 2023 | £725K | £18K | £1.8M | £995K | 12 |
| 31 Mar 2022 | £617K | £13K | £1.2M | £469K | 13 |
| 31 Mar 2021 | £325K | £195K | £712K | £263K | 15 |
| 31 Mar 2020 | £677K | £257K | £992K | £324K | 20 |
| 31 Mar 2019 | £704K | £331K | £1M | £338K | |
| 31 Mar 2018 | £753K | £297K | £980K | £246K |
Where Infallible Systems Limited is registered
The registered office is in Erith (DA8), in the Bexley local authority area, London. Show DA8 2AJ on a map.
Other trade companies in DA8
- Globaltrade321 LtdBuilders
- The Pheasant Garage (S.E.) LtdMechanics and garages
- Roman Square Group LtdBuilders
- Rigor Air Conditioning LtdPlumbers and heating engineers
- SPN Cleaning Service LtdCleaning companies
- Olivia’S Bathrooms and Kitchens LtdInstallers
- CBV Auto LtdMechanics and garages
- Abbewood LtdMotor traders
Also registered at this address
1 other company uses the same registered office as Infallible Systems Limited.
- Infallible Systems Group LimitedSpecialist contractors
What happens if Infallible Systems 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 29 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Jun 2027 to 29 Jul 2027 | £150 |
| 1 to 3 months late | 30 Jul 2027 to 29 Sep 2027 | £375 |
| 3 to 6 months late | 30 Sep 2027 to 29 Dec 2027 | £750 |
| More than 6 months late | From 30 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Sep 2027 | £200 |
| 3 months late | 29 Dec 2027 | another £200 |
| 6 months late | 29 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 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
- 03335143
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 March 1997 (29 years ago)
- Registered office
- Unit 26 Manford Industrial Estate, Manor Road, Erith, DA8 2AJ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 29 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 17 November 2025
- Charges (mortgages)
- 1 outstanding of 2 registered
- Previous names
- Infallible Asphalt Limited (until 31 Mar 2008)
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Erith
Other active specialist construction companies registered in Erith.
- J T Stonework & Restoration Limited2007
- Julian James & Sons Limited2014
- Kershaw Contracting Services Limited1972
- KM Chernev Ltd2014
- Lee Campbell Limited2009
- Lubek Properties Limited2007
- Meyer Construction Ltd2023
- Mojob Limited2015
All specialist construction companies in Erith · All trades in Erith · Specialist contractors across the UK
Frequently asked questions
When are Infallible Systems Limited's accounts due?
Infallible Systems Limited's next accounts are due at Companies House by 29 June 2027 (in 260 days), covering the period to 29 September 2026.
When is Infallible Systems Limited's CT600 due?
The CT600 for the period to 29 September 2026 is due at HMRC by 29 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 June 2027.
Is Infallible Systems Limited still trading?
Infallible Systems 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 Infallible Systems Limited do?
Infallible Systems Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Infallible Systems Limited?
Infallible Systems Limited was incorporated on 18 March 1997, 29 years ago.
What is the penalty if Infallible Systems 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 Infallible Systems 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.