- Companies
- Electricians
- Thornton Heath
- Astronic Limited
Astronic Limited
- Company number
- 03826799
- Incorporated
- 17 Aug 199927 years trading
- Registered office
- 50 Florida Road, Thornton Heath, Surrey, CR7 8EW
- Nature of business
- Electrical installation
Astronic Limited is a 27-year-old private limited company registered in Thornton Heath, company number 03826799, one of 33 electrical contractors in Thornton Heath. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £4,408 (+3.9%) on the year before, to -£108K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £5,962 against £113K owed within a year: 0.1 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | -£108K | £5,962 | £113K | 1 | |
| 31 Aug 2024 | -£112K | £250 | £113K | 1 | |
| 31 Aug 2023 | -£105K | £787 | £106K | 1 | |
| 31 Aug 2022 | -£124K | £1,651 | £125K | 1 | |
| 31 Aug 2021 | -£135K | £18K | £153K | 1 | |
| 31 Aug 2020 | -£196K | £14K | £210K | 1 | |
| 31 Aug 2019 | -£217K | £0 | £217K | 1 | |
| 31 Aug 2018 | -£207K | £232 | £207K | 1 | |
| 31 Aug 2017 | -£200K | £200K | |||
| 31 Aug 2016 | -£188K | £188K |
Where Astronic Limited is registered
The registered office is in Thornton Heath (CR7), in the Croydon local authority area, London. Show CR7 8EW on a map.
Other trade companies in CR7
- Ib Air Conditioning LimitedPlumbers and heating engineers
- Gold Carpet Cleaning Services LtdCleaning companies
- Azad Auto LtdMechanics and garages
- Tota Steel LtdFinishing trades
- Survey Stream Property Services LtdFacilities management
- Saunders Mechanics LtdMechanics and garages
- SR Gas London LimitedPlumbers and heating engineers
- Prestige Auto Repair & Body Works LtdMechanics and garages
What happens if Astronic 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 31 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 03826799
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 August 1999 (27 years ago)
- Registered office
- 50 Florida Road, Thornton Heath, Surrey, CR7 8EW
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 17 August 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 in Thornton Heath
Other active electrical contractors registered in Thornton Heath.
- Bromley Borough Electrical Ltd2026
- Cha3 Electric Limited2026
- Chamon Electrical & Building Contractors Limited2011
- Ea Electrical Services Limited2024
- Eap and Co Limited2024
- Edward Madden Electrics Ltd2023
- Expert Electrics Ltd2024
- Fix IT Electrical Services Ltd2017
All electrical contractors in Thornton Heath · All trades in Thornton Heath · Electricians across the UK
Frequently asked questions
When are Astronic Limited's accounts due?
Astronic Limited's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is Astronic Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Astronic Limited still trading?
Astronic 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 Astronic Limited do?
Astronic Limited is registered under Electrical installation (SIC 43210).
How old is Astronic Limited?
Astronic Limited was incorporated on 17 August 1999, 27 years ago.
What is the penalty if Astronic 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 Astronic 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.