- Companies
- Electricians
- London
- Testwise Ltd
Testwise Ltd
- Company number
- 17042544
- Incorporated
- 19 Feb 2026
- Registered office
- Flat 16, 1 Rick Roberts Way, London, E15 2FP
- Nature of business
- Electrical installation; Retail sale via mail order houses or via Internet; Technical testing and analysis
Testwise Ltd is a newly incorporated private limited company registered in London, company number 17042544, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 19 November 2027, and its first CT600 is due at HMRC on 18 February 2028.
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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Who runs and owns Testwise Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| N*** N*** | Director | Feb 2026 |
Person with significant control
Where Testwise Ltd is registered
The registered office is in London (E15), in the Newham local authority area, London. Show E15 2FP on a map.
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What happens if Testwise 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 19 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 20 Nov 2027 to 19 Dec 2027 | £150 |
| 1 to 3 months late | 20 Dec 2027 to 19 Feb 2028 | £375 |
| 3 to 6 months late | 20 Feb 2028 to 19 May 2028 | £750 |
| More than 6 months late | From 20 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2029 | 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
- 17042544
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 February 2026
- Registered office
- Flat 16, 1 Rick Roberts Way, London, E15 2FP
- Nature of business
- Electrical installation (SIC 43210)
Retail sale via mail order houses or via Internet (SIC 47910)
Technical testing and analysis (SIC 71200) - Year end
- 28 February (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in London
Other active electrical contractors registered in London.
- Tetra Building Contractors Ltd2018
- Tetra Electrical Ltd2023
- Tetra Engineering Contractors Ltd2019
- Tew Power Engineering Limited2025
- TH Electrics Ltd2026
- TH.Es Enterprises Ltd2013
- Thames Glow Limited2015
- Thames Spark Renewables Ltd2022
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Testwise Ltd's accounts due?
Testwise Ltd's next accounts are due at Companies House by 19 November 2027 (in 403 days), covering the period to 28 February 2027.
When is Testwise 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 18 February 2027, due by 18 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Testwise Ltd still trading?
Testwise 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 Testwise Ltd do?
Testwise Ltd is registered under Electrical installation (SIC 43210); Retail sale via mail order houses or via Internet (SIC 47910); Technical testing and analysis (SIC 71200).
How old is Testwise Ltd?
Testwise Ltd was incorporated on 19 February 2026, less than a year ago.
Who runs Testwise Ltd?
Testwise Ltd has 1 active director, the longest-serving appointed in Feb 2026. Their names and service addresses are on the Companies House register.
Who owns Testwise Ltd?
One person or company has significant control of Testwise Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Testwise 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 Testwise 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.