- Companies
- Electricians
- Instasonic Limited
Instasonic Limited
- Company number
- 11839971
- Incorporated
- 21 Feb 20197 years trading
- Registered office
- 20 Brook Court, Spring Place, Essex, IG11 7GH
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Other construction installation; Other specialised construction activities n.e.c.
Instasonic Limited is a 7-year-old private limited company registered in Essex, company number 11839971, one of the UK's electrical contractors. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £2,683 (+20.9%) on the year before, to £16K.
- Net assets rose in 4 of 5 year-on-year comparisons on record.
- Current assets of £49K against £18K owed within a year: 2.7 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £16K | £49K | £18K | 3 | |
| 28 Feb 2024 | £13K | £50K | £19K | 3 | |
| 28 Feb 2023 | £11K | £38K | £10K | 3 | |
| 28 Feb 2022 | £1,226 | £47K | £12K | 2 | |
| 28 Feb 2021 | £321 | £38K | £4,862 | 2 | |
| 28 Feb 2020 | £683 | £2,015 | £1,332 |
Where Instasonic Limited is registered
The registered office is in Essex (IG11), in the Barking and Dagenham local authority area, London. Show IG11 7GH on a map.
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What happens if Instasonic Limited 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 11839971
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 February 2019 (7 years ago)
- Registered office
- 20 Brook Court, Spring Place, Essex, IG11 7GH
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Other construction installation (SIC 43290)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 28 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 20 February 2026
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
Other active electrical contractors.
Frequently asked questions
When are Instasonic Limited's accounts due?
Instasonic Limited's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Instasonic Limited's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Instasonic Limited still trading?
Instasonic Limited 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 Instasonic Limited do?
Instasonic Limited is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Other construction installation (SIC 43290); Other specialised construction activities n.e.c. (SIC 43999).
How old is Instasonic Limited?
Instasonic Limited was incorporated on 21 February 2019, 7 years ago.
What is the penalty if Instasonic Limited 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 Instasonic Limited 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.