- Companies
- Civil engineering
- London
- Ikoson Limited
Ikoson Limited
- Company number
- 09925635
- Incorporated
- 22 Dec 201510 years trading
- Registered office
- 158C Blackstock Road, London, N5 1HA
- Nature of business
- Construction of railways and underground railways; Other cleaning services; Other human health activities
Ikoson Limited is a 10-year-old private limited company registered in London, company number 09925635, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £460 (+181.1%) on the year before, to £714.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £2,690 against £1,704 owed within a year: 1.6 times cover.
- 2 employees 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 |
|---|---|---|---|---|---|
| 31 Dec 2025 | £714 | £773 | £2,690 | £1,704 | 2 |
| 31 Dec 2024 | £254 | £271 | £2,201 | £1,674 | 2 |
| 31 Dec 2023 | -£723 | £866 | £2,387 | £1,597 | 2 |
| 31 Dec 2022 | -£1,794 | £111 | £7,993 | £2,798 | 2 |
| 31 Dec 2021 | -£9,275 | £443 | £1,799 | £2,146 | 2 |
| 31 Dec 2020 | -£8,512 | £1,001 | £1,319 | £3,575 | 2 |
| 31 Dec 2019 | -£376 | £131 | £1,624 | £1,492 | 2 |
| 31 Dec 2018 | -£1,520 | £27 | £344 | £1,863 | |
| 31 Dec 2017 | £2,933 | £317 | £3,250 | ||
| 31 Dec 2016 | -£2,503 | £152 | £2,655 |
Where Ikoson Limited is registered
The registered office is in London (N5), in the Islington local authority area, London. Show N5 1HA on a map.
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- Hazel Ozrenk Studio LtdFinishing trades
- Impoluto LtdCleaning companies
- Intechart LtdBuilders
What happens if Ikoson 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 09925635
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 December 2015 (10 years ago)
- Registered office
- 158C Blackstock Road, London, N5 1HA
- Nature of business
- Construction of railways and underground railways (SIC 42120)
Other cleaning services (SIC 81299)
Other human health activities (SIC 86900) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 1 June 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.
- Illin Services Ltd2024
- Imperial Global Investments Ltd2025
- Imperial Power Limited2022
- Inception Mechanical & Electrical Solutions Limited2017
- Ind Fittings Limited2020
- Infinity Complete Services Ltd2021
- Infra Construction Ltd2022
- Infra8 Ltd2026
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Ikoson Limited's accounts due?
Ikoson Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Ikoson Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Ikoson Limited still trading?
Ikoson 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 Ikoson Limited do?
Ikoson Limited is registered under Construction of railways and underground railways (SIC 42120); Other cleaning services (SIC 81299); Other human health activities (SIC 86900).
How old is Ikoson Limited?
Ikoson Limited was incorporated on 22 December 2015, 10 years ago.
What is the penalty if Ikoson 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 Ikoson 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.