- Companies
- Electricians
- Hertford
- Insup Limited
Insup Limited
- Company number
- 16328220
- Incorporated
- 19 Mar 20251 year trading
- Registered office
- Belfry House, Bell Lane, Hertford, Hertfordshire, SG14 1BP
- Nature of business
- Electrical installation
Insup Limited is a 1-year-old private limited company registered in Hertford, company number 16328220, one of 54 electrical contractors in Hertford. Its next accounts are due at Companies House on 19 December 2026, and its first CT600 is due at HMRC on 18 March 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.
Is this your company?
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Where Insup Limited is registered
The registered office is in Hertford (SG14), in the East Hertfordshire local authority area, East of England. Show SG14 1BP on a map.
Other trade companies in SG14
- Bespoke Performance Training LimitedMotor traders
- Ak Collectibles LimitedMotor traders
- Hoe Lane LimitedProperty developers
- Meads Plumbing & Heating LimitedPlumbers and heating engineers
- SRP Plumbing Services LtdPlumbers and heating engineers
- Worster and Son LimitedFinishing trades
- Recovery and Garage Services LimitedMechanics and garages
- The Village Home & Garden Company LtdFinishing trades
Shared registered office
158 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 Insup 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 19 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 20 Dec 2026 to 19 Jan 2027 | £150 |
| 1 to 3 months late | 20 Jan 2027 to 19 Mar 2027 | £375 |
| 3 to 6 months late | 20 Mar 2027 to 19 Jun 2027 | £750 |
| More than 6 months late | From 20 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 16328220
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 March 2025 (1 year ago)
- Registered office
- Belfry House, Bell Lane, Hertford, Hertfordshire, SG14 1BP
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 18 March 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 Hertford
Other active electrical contractors registered in Hertford.
- Int Electrical Ltd2023
- Integrityapplianceinstallation Ltd2023
- Intor Design Limited2006
- J H Electrical Installations Limited2019
- J&S Electrical Installations Ltd2025
- JKN Electrical Limited2020
- Jones Electrical Contractors Ltd2015
- JW Electrical Solutions Limited2010
All electrical contractors in Hertford · All trades in Hertford · Electricians across the UK
Frequently asked questions
When are Insup Limited's accounts due?
Insup Limited's next accounts are due at Companies House by 19 December 2026 (in 67 days), covering the period to 31 March 2026.
When is Insup Limited'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 March 2026, due by 18 March 2027, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Insup Limited still trading?
Insup 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 Insup Limited do?
Insup Limited is registered under Electrical installation (SIC 43210).
How old is Insup Limited?
Insup Limited was incorporated on 19 March 2025, 1 year ago.
What is the penalty if Insup 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 Insup 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.