Onyix Ltd
- Company number
- 13674453
- Incorporated
- 12 Oct 20215 years trading
- Registered office
- C/O Aacsl Accountants Ltd 1ST Floor North Westgate House, Harlow, Essex, CM20 1YS
- Nature of business
- Other specialised construction activities n.e.c.; Buying and selling of own real estate; Residential care activities for learning difficulties, mental health and substance abuse
Onyix Ltd is a 5-year-old private limited company registered in Harlow, company number 13674453, one of 116 specialist construction companies in Harlow. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £160 (+29%) on the year before, to £711.
- Net assets rose in 3 of 3 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 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £711 | £711 | 0 | ||
| 31 Oct 2024 | £551 | £551 | 0 | ||
| 31 Oct 2023 | £451 | £0 | £451 | 0 | |
| 31 Oct 2022 | £351 | £291 | £642 | 0 |
Where Onyix Ltd is registered
The registered office is in Harlow (CM20), in the Harlow local authority area, East of England. Show CM20 1YS on a map.
Other trade companies in CM20
- Alpha Security, Auto Care and Facilities Maintenance LtdMechanics and garages
- VLD Partners LtdProperty developers
- Ata Pro LtdBuilders
- TLK Cons LtdSpecialist contractors
- Cavity Drain Pumps ( CDP ) LtdInstallers
- United Auto Solutions LtdMechanics and garages
- Ace Consolidate LimitedFinishing trades
- Wersatis & Global Parts LtdMotor traders
What happens if Onyix 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 13674453
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 October 2021 (5 years ago)
- Registered office
- C/O Aacsl Accountants Ltd 1ST Floor North Westgate House, Harlow, Essex, CM20 1YS
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Buying and selling of own real estate (SIC 68100)
Residential care activities for learning difficulties, mental health and substance abuse (SIC 87200) - Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 11 October 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 Harlow
Other active specialist construction companies registered in Harlow.
- P&M (UK) Ltd2014
- Pinnacle Partition Systems Limited2008
- PR Construct Ltd2023
- Precision Refits Ltd2026
- PRM Trading Ltd2018
- Puttnam Building & Damp Proofing Specialists Ltd2024
- R L Harrison Construction Services Limited2018
- R.A.B Site Management Limited2012
All specialist construction companies in Harlow · All trades in Harlow · Specialist contractors across the UK
Frequently asked questions
When are Onyix Ltd's accounts due?
Onyix Ltd's next accounts are due at Companies House by 31 July 2027 (in 292 days), covering the period to 31 October 2026.
When is Onyix Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Onyix Ltd still trading?
Onyix 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 Onyix Ltd do?
Onyix Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Buying and selling of own real estate (SIC 68100); Residential care activities for learning difficulties, mental health and substance abuse (SIC 87200).
How old is Onyix Ltd?
Onyix Ltd was incorporated on 12 October 2021, 5 years ago.
What is the penalty if Onyix 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 Onyix 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.