- Companies
- Machinery repair and installation
- London
- JK Complex Solutions Ltd
JK Complex Solutions Ltd
- Company number
- 14476641
- Incorporated
- 10 Nov 20223 years trading
- Registered office
- 20-22 Wenlock Road, London, N1 7GU
- Nature of business
- Repair of electrical equipment; Plumbing, heat and air-conditioning installation; Other building completion and finishing; Roofing activities
JK Complex Solutions Ltd is a 3-year-old private limited company registered in London, company number 14476641, one of 1,743 machinery repair and installation companies in London. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £5,019 (+99.1%) on the year before, to £10K.
- Current assets of £7,179 against £17K owed within a year: 0.4 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £10K | £7,179 | £17K | 4 | |
| 30 Nov 2024 | £5,066 | £12K | 4 | ||
| 30 Nov 2023 | £6,299 | £2,552 | £8,851 | 4 |
Where JK Complex Solutions Ltd is registered
The registered office is in London (N1), in the Hackney local authority area, London. Show N1 7GU on a map.
Other trade companies in N1
- Tagwise LtdSpecialist contractors
- Sphere Aviation Solutions UK LtdMachinery repair and installation
- Get IT Done Builders LtdJoiners and carpenters
- Evolution Products LimitedMotor traders
- Fleetstone Trading LtdMotor traders
- Kenneth Brady LtdElectricians
- UK Import Export LtdBuilders
- Magic Door Services LimitedMachinery repair and installation
Shared registered office
804 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if JK Complex Solutions 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 14476641
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 November 2022 (3 years ago)
- Registered office
- 20-22 Wenlock Road, London, N1 7GU
- Nature of business
- Repair of electrical equipment (SIC 33140)
Plumbing, heat and air-conditioning installation (SIC 43220)
Other building completion and finishing (SIC 43390)
Roofing activities (SIC 43910) - Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 15 November 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 London
Other active machinery repair and installation companies registered in London.
- JL Fault Fixer Ltd2025
- JM Lift Services Limited2015
- JMP Medical Solutions Ltd2021
- JN Electrics (London) Ltd2014
- JNS Industrial Ltd2026
- Jo Business Ltd2020
- Job Fix Boats Ltd2026
- Jois Communication UK Ltd2021
All machinery repair and installation companies in London · All trades in London · Machinery repair and installation across the UK
Frequently asked questions
When are JK Complex Solutions Ltd's accounts due?
JK Complex Solutions Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is JK Complex Solutions Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is JK Complex Solutions Ltd still trading?
JK Complex Solutions 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 JK Complex Solutions Ltd do?
JK Complex Solutions Ltd is registered under Repair of electrical equipment (SIC 33140); Plumbing, heat and air-conditioning installation (SIC 43220); Other building completion and finishing (SIC 43390); Roofing activities (SIC 43910).
How old is JK Complex Solutions Ltd?
JK Complex Solutions Ltd was incorporated on 10 November 2022, 3 years ago.
What is the penalty if JK Complex Solutions 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 JK Complex Solutions 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.