Ilsi Ltd
- Company number
- NI666449
- Incorporated
- 11 Dec 20196 years trading
- Registered office
- 13 Carn End, Holywood, Down, BT18 9PX
- Nature of business
- Repair of electrical equipment; Electrical installation
Ilsi Ltd is a 6-year-old private limited company registered in Holywood, company number NI666449, one of the UK's machinery repair and installation companies. 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 down £37K (-36.9%) on the year before, to £64K.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £56K against £42K owed within a year: 1.3 times cover.
- 5 employees on average, up from 3 the year before.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £64K | £56K | £42K | 5 | |
| 20 Jan 2025 | £101K | £91K | £65K | 3 | |
| 20 Jan 2024 | £27K | £85K | £70K | 5 | |
| 20 Jan 2023 | £21K | £75K | £62K | 4 | |
| 31 Dec 2021 | £27K | £19K | £46K | 4 | |
| 31 Dec 2020 | £20K | £7,256 | £48K | £7,751 | 3 |
Where Ilsi Ltd is registered
The registered office is in Holywood (BT18), in the Ards and North Down local authority area, Northern Ireland. Show BT18 9PX on a map.
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What happens if Ilsi 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 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
- NI666449
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 December 2019 (6 years ago)
- Registered office
- 13 Carn End, Holywood, Down, BT18 9PX
- Nature of business
- Repair of electrical equipment (SIC 33140)
Electrical installation (SIC 43210) - Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 7 December 2025
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in Holywood
Other active machinery repair and installation companies registered in Holywood.
All machinery repair and installation companies in Holywood · All trades in Holywood · Machinery repair and installation across the UK
Frequently asked questions
When are Ilsi Ltd's accounts due?
Ilsi Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Ilsi Ltd'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 Ilsi Ltd still trading?
Ilsi 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 Ilsi Ltd do?
Ilsi Ltd is registered under Repair of electrical equipment (SIC 33140); Electrical installation (SIC 43210).
How old is Ilsi Ltd?
Ilsi Ltd was incorporated on 11 December 2019, 6 years ago.
What is the penalty if Ilsi 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 Ilsi 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.