- Companies
- Motor traders
- London
- Blackbox Auto Ltd
Blackbox Auto Ltd
- Company number
- 16880325
- Incorporated
- 28 Nov 2025
- Registered office
- 128 City Road, London, EC1V 2NX
- Nature of business
- Sale of used cars and light motor vehicles; Freight transport by road; Other service activities incidental to land transportation, n.e.c.; Other transportation support activities
Blackbox Auto Ltd is a newly incorporated private limited company registered in London, company number 16880325, one of 4,670 motor trade companies in London. Its next accounts are due at Companies House on 28 August 2027, and its first CT600 is due at HMRC on 27 November 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Blackbox Auto Ltd is registered
The registered office is in London (EC1V), in the Islington local authority area, London. Show EC1V 2NX on a map.
Other trade companies in EC1V
- Cardiff Electrical Solutions LtdElectricians
- Edemis Construction LtdBuilders
- Zaylan LtdProperty developers
- Pronto Roofing and Construction LtdRoofers
- Instal Systems LtdPlumbers and heating engineers
- J&R Partners LtdBuilders
- The Tile Craft LtdFinishing trades
- Cathal Od Solutions LtdSpecialist contractors
Shared registered office
2,436 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 Blackbox Auto 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 28 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 29 Aug 2027 to 28 Sep 2027 | £150 |
| 1 to 3 months late | 29 Sep 2027 to 28 Nov 2027 | £375 |
| 3 to 6 months late | 29 Nov 2027 to 28 Feb 2028 | £750 |
| More than 6 months late | From 29 Feb 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
- 16880325
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 November 2025
- Registered office
- 128 City Road, London, EC1V 2NX
- Nature of business
- Sale of used cars and light motor vehicles (SIC 45112)
Freight transport by road (SIC 49410)
Other service activities incidental to land transportation, n.e.c. (SIC 52219)
Other transportation support activities (SIC 52290) - Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for motor trade companies
Motor trade companies hold vehicle stock, and how that stock is valued at the year end moves the profit directly. Some use the VAT margin scheme.
Similar companies in London
Other active motor trade companies registered in London.
- Blackheath Developments Ltd2020
- Blacklane Hire Limited2026
- Blackrim Ltd2026
- Blackstone Motors Ltd2017
- Blackwell & Finch Ltd2024
- Blackwood Motor Company Ltd2026
- Blakewood Automotive Ltd2026
- Blossom Motors Ltd2026
All motor trade companies in London · All trades in London · Motor traders across the UK
Frequently asked questions
When are Blackbox Auto Ltd's accounts due?
Blackbox Auto Ltd's next accounts are due at Companies House by 28 August 2027 (in 320 days), covering the period to 30 November 2026.
When is Blackbox Auto Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 27 November 2026, due by 27 November 2027, and one for the period to 30 November 2026, due by 30 November 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Blackbox Auto Ltd still trading?
Blackbox Auto 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 Blackbox Auto Ltd do?
Blackbox Auto Ltd is registered under Sale of used cars and light motor vehicles (SIC 45112); Freight transport by road (SIC 49410); Other service activities incidental to land transportation, n.e.c. (SIC 52219); Other transportation support activities (SIC 52290).
How old is Blackbox Auto Ltd?
Blackbox Auto Ltd was incorporated on 28 November 2025, less than a year ago.
What is the penalty if Blackbox Auto 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 Blackbox Auto 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.