- Companies
- Specialist contractors
- Sunderland
- Idw Neptune Ltd
Idw Neptune Ltd
- Company number
- 16423937
- Incorporated
- 1 May 20251 year trading
- Registered office
- 2A Birtley Avenue, Sunderland, SR5 4LR
- Nature of business
- Other specialised construction activities n.e.c.
Idw Neptune Ltd is a 1-year-old private limited company registered in Sunderland, company number 16423937, one of 81 specialist construction companies in Sunderland. Its next accounts are due at Companies House on 1 February 2027, and its first CT600 is due at HMRC on 30 April 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?
File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Idw Neptune LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Where Idw Neptune Ltd is registered
The registered office is in Sunderland (SR5), in the Sunderland local authority area, North East. Show SR5 4LR on a map.
Other trade companies in SR5
- All Clean Northeast UK LtdCleaning companies
- DM Property Services (Ne) LimitedSpecialist contractors
- Ems Car and Van Services LimitedMechanics and garages
- Ayo Merchants UK LimitedMotor traders
- Devlin Electrical Services LtdElectricians
- BG Building & Facilities LtdPlumbers and heating engineers
- Imo Car Wash Washington LtdCleaning companies
- Al Blades LtdMachinery repair and installation
What happens if Idw Neptune 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 1 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 2 Feb 2027 to 1 Mar 2027 | £150 |
| 1 to 3 months late | 2 Mar 2027 to 1 May 2027 | £375 |
| 3 to 6 months late | 2 May 2027 to 1 Aug 2027 | £750 |
| More than 6 months late | From 2 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 16423937
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 May 2025 (1 year ago)
- Registered office
- 2A Birtley Avenue, Sunderland, SR5 4LR
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 30 April 2026
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 Sunderland
Other active specialist construction companies registered in Sunderland.
- J & F Precision (Sunderland) Limited2011
- J & J Timber Limited2017
- J C Reed Ltd2026
- J Farquhar Wind Ltd2026
- Jack Ford Electrical Limited2017
- JDS Energy Consultancy Ltd2023
- JH Power Ltd2026
- JMJ Building Services Limited2009
All specialist construction companies in Sunderland · All trades in Sunderland · Specialist contractors across the UK
Frequently asked questions
When are Idw Neptune Ltd's accounts due?
Idw Neptune Ltd's next accounts are due at Companies House by 1 February 2027 (in 111 days), covering the period to 31 May 2026.
When is Idw Neptune 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 30 April 2026, due by 30 April 2027, and one for the period to 31 May 2026, due by 31 May 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Idw Neptune Ltd still trading?
Idw Neptune 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 Idw Neptune Ltd do?
Idw Neptune Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Idw Neptune Ltd?
Idw Neptune Ltd was incorporated on 1 May 2025, 1 year ago.
What is the penalty if Idw Neptune 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 Idw Neptune 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.