- Companies
- Electricians
- London
- Tester Ltd
Tester Ltd
- Company number
- 17327922
- Incorporated
- 8 Jul 2026
- Registered office
- 33 Salisbury Hall Gardens, London, E4 8SA
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Business and domestic software development; Technical testing and analysis
Tester Ltd is a newly incorporated private limited company registered in London, company number 17327922, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 8 April 2028, and its first CT600 is due at HMRC on 7 July 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.
Is this your company?
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Where Tester Ltd is registered
The registered office is in London (E4), in the Waltham Forest local authority area, London. Show E4 8SA on a map.
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What happens if Tester 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 8 April 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 9 Apr 2028 to 8 May 2028 | £150 |
| 1 to 3 months late | 9 May 2028 to 8 Jul 2028 | £375 |
| 3 to 6 months late | 9 Jul 2028 to 8 Oct 2028 | £750 |
| More than 6 months late | From 9 Oct 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2028 | £200 |
| 3 months late | 31 Oct 2028 | another £200 |
| 6 months late | 31 Jan 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 17327922
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 July 2026
- Registered office
- 33 Salisbury Hall Gardens, London, E4 8SA
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Business and domestic software development (SIC 62012)
Technical testing and analysis (SIC 71200) - Year end
- 31 July (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.
- Testing Compliance Services Ltd2019
- Testwise Ltd2026
- Tetra Building Contractors Ltd2018
- Tetra Electrical Ltd2023
- Tetra Engineering Contractors Ltd2019
- Tew Power Engineering Limited2025
- TH Electrics Ltd2026
- TH.Es Enterprises Ltd2013
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Tester Ltd's accounts due?
Tester Ltd's next accounts are due at Companies House by 8 April 2028 (in 544 days), covering the period to 31 July 2027.
When is Tester 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 7 July 2027, due by 7 July 2028, and one for the period to 31 July 2027, due by 31 July 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Tester Ltd still trading?
Tester 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 Tester Ltd do?
Tester Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Business and domestic software development (SIC 62012); Technical testing and analysis (SIC 71200).
How old is Tester Ltd?
Tester Ltd was incorporated on 8 July 2026, less than a year ago.
What is the penalty if Tester 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 Tester 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.