- Companies
- Civil engineering
- London
- Infratech Synergies Ltd
Infratech Synergies Ltd
- Company number
- 15044567
- Incorporated
- 2 Aug 20233 years trading
- Registered office
- 108 Sterling Gardens, London, SE14 6DZ
- Nature of business
- Construction of other civil engineering projects n.e.c.; Engineering related scientific and technical consulting activities; Other engineering activities; Other professional, scientific and technical activities n.e.c.
Infratech Synergies Ltd is a 3-year-old private limited company registered in London, company number 15044567, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 up £8,002 (+502.6%) on the year before, to £9,594.
- Current assets of £22K against £13K owed within a year: 1.7 times cover.
- 2 employees on average, up from 0 the year before.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £9,594 | £264 | £22K | £13K | 2 |
| 31 Aug 2024 | £1,592 | £4,988 | £26K | £24K | 0 |
Where Infratech Synergies Ltd is registered
The registered office is in London (SE14), in the Lewisham local authority area, London. Show SE14 6DZ on a map.
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What happens if Infratech Synergies 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 31 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 15044567
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 August 2023 (3 years ago)
- Registered office
- 108 Sterling Gardens, London, SE14 6DZ
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Engineering related scientific and technical consulting activities (SIC 71122)
Other engineering activities (SIC 71129)
Other professional, scientific and technical activities n.e.c. (SIC 74909) - Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 1 August 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- Infrateck Civil Solutions Ltd2025
- Ingeenium Engineering Limited2019
- Innovative Utilities (UK) Limited2010
- Installation Operations Ltd2024
- Intay Engineering, Contracting and Trading (Igbr) Ltd2015
- Intec Energy Solutions Limited2024
- Integrated Solutions Consultancy Limited2017
- Integren Enfield Ltd2025
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Infratech Synergies Ltd's accounts due?
Infratech Synergies Ltd's next accounts are due at Companies House by 31 May 2027 (in 229 days), covering the period to 31 August 2026.
When is Infratech Synergies Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Infratech Synergies Ltd still trading?
Infratech Synergies 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 Infratech Synergies Ltd do?
Infratech Synergies Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Engineering related scientific and technical consulting activities (SIC 71122); Other engineering activities (SIC 71129); Other professional, scientific and technical activities n.e.c. (SIC 74909).
How old is Infratech Synergies Ltd?
Infratech Synergies Ltd was incorporated on 2 August 2023, 3 years ago.
What is the penalty if Infratech Synergies 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 Infratech Synergies 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.