- Companies
- Specialist contractors
- Portsmouth
- Thomcore Limited
Thomcore Limited
- Company number
- 17410086
- Incorporated
- 19 Aug 2026
- Registered office
- 25 Bell Road, Portsmouth, PO6 3NX
- Nature of business
- Other specialised construction activities n.e.c.; Other engineering activities
Thomcore Limited is a newly incorporated private limited company registered in Portsmouth, company number 17410086, one of 193 specialist construction companies in Portsmouth. Its next accounts are due at Companies House on 19 May 2028, and its first CT600 is due at HMRC on 18 August 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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Where Thomcore Limited is registered
The registered office is in Portsmouth (PO6), in the Portsmouth local authority area, South East. Show PO6 3NX on a map.
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What happens if Thomcore 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 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 20 May 2028 to 19 Jun 2028 | £150 |
| 1 to 3 months late | 20 Jun 2028 to 19 Aug 2028 | £375 |
| 3 to 6 months late | 20 Aug 2028 to 19 Nov 2028 | £750 |
| More than 6 months late | From 20 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17410086
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 August 2026
- Registered office
- 25 Bell Road, Portsmouth, PO6 3NX
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Other engineering activities (SIC 71129) - Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Portsmouth
Other active specialist construction companies registered in Portsmouth.
- Timberwise Construction Ltd2024
- TNT Brickwork Ltd2015
- Tony Parrack Fire Protection Ltd2026
- Topline Windows & Conservatories Southern Limited1999
- Triton Global Structures Ltd2025
- Up 4 Access Limited2009
- V3 Contract Services Limited2016
- Village Green Deal Limited2013
All specialist construction companies in Portsmouth · All trades in Portsmouth · Specialist contractors across the UK
Frequently asked questions
When are Thomcore Limited's accounts due?
Thomcore Limited's next accounts are due at Companies House by 19 May 2028 (in 584 days), covering the period to 31 August 2027.
When is Thomcore 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 August 2027, due by 18 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Thomcore Limited still trading?
Thomcore 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 Thomcore Limited do?
Thomcore Limited is registered under Other specialised construction activities n.e.c. (SIC 43999); Other engineering activities (SIC 71129).
How old is Thomcore Limited?
Thomcore Limited was incorporated on 19 August 2026, less than a year ago.
What is the penalty if Thomcore 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 Thomcore 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.