- Companies
- Specialist contractors
- Erith
- Infallible Systems Group Limited
Infallible Systems Group Limited
- Company number
- 12487267
- Incorporated
- 27 Feb 20206 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 Group Limited is a 6-year-old private limited company registered in Erith, company number 12487267, one of 42 specialist construction companies in Erith. 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 unchanged on the year before, at -£125K.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 6 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | -£125K | £126K | 0 | ||
| 30 Sep 2024 | -£125K | £126K | 0 | ||
| 31 Mar 2024 | -£125K | £126K | 0 | ||
| 31 Mar 2023 | £600K | £126K | 0 | ||
| 31 Mar 2022 | £492K | £126K | 1 | ||
| 31 Mar 2021 | £347K | £126K | 1 |
Where Infallible Systems Group Limited is registered
The registered office is in Erith (DA8), in the Bexley local authority area, London. Show DA8 2AJ on a map.
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Also registered at this address
1 other company uses the same registered office as Infallible Systems Group Limited.
- Infallible Systems LimitedSpecialist contractors
What happens if Infallible Systems Group 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
- 12487267
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 February 2020 (6 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
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 17 November 2025
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.
- Infallible Systems Limited1997
- 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
All specialist construction companies in Erith · All trades in Erith · Specialist contractors across the UK
Frequently asked questions
When are Infallible Systems Group Limited's accounts due?
Infallible Systems Group 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 Infallible Systems Group 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 Infallible Systems Group Limited still trading?
Infallible Systems Group 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 Group Limited do?
Infallible Systems Group Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Infallible Systems Group Limited?
Infallible Systems Group Limited was incorporated on 27 February 2020, 6 years ago.
What is the penalty if Infallible Systems Group 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 Group 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.