- Companies
- Civil engineering
- Peterborough
- MJJ Welding Limited
MJJ Welding Limited
- Company number
- 13609921
- Incorporated
- 8 Sep 20215 years trading
- Registered office
- 52 Thackers Way, Deeping ST James, Peterborough, PE6 8HP
- Nature of business
- Construction of railways and underground railways
MJJ Welding Limited is a 5-year-old private limited company registered in Peterborough, company number 13609921, one of 83 civil engineering contractors in Peterborough. 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 £1,895 (+30.9%) on the year before, to £8,037.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £17K against £9,369 owed within a year: 1.9 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £8,037 | £17K | £9,369 | 1 | |
| 31 Aug 2024 | £6,142 | £19K | £13K | 1 | |
| 31 Aug 2023 | £4,192 | £22K | £18K | 1 | |
| 31 Aug 2022 | £2,172 | £11K | £9,102 | 1 |
Where MJJ Welding Limited is registered
The registered office is in Peterborough (PE6), in the South Kesteven local authority area, East Midlands. Show PE6 8HP on a map.
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What happens if MJJ Welding 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
- 13609921
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 September 2021 (5 years ago)
- Registered office
- 52 Thackers Way, Deeping ST James, Peterborough, PE6 8HP
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 7 September 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Peterborough
Other active civil engineering contractors registered in Peterborough.
- MK Civils Solutions Ltd2026
- Nadeem Construction Ltd2004
- Nastec Engineering Ltd2026
- Nexus Construction 1 Ltd2025
- P. J. Slater Scaffolding Services Limited2002
- Pacsat Ltd2025
- Petre Szasz Engineering Ltd2019
- Pitsikas Contractors Ltd2026
All civil engineering contractors in Peterborough · All trades in Peterborough · Civil engineering across the UK
Frequently asked questions
When are MJJ Welding Limited's accounts due?
MJJ Welding Limited's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is MJJ Welding 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 MJJ Welding Limited still trading?
MJJ Welding 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 MJJ Welding Limited do?
MJJ Welding Limited is registered under Construction of railways and underground railways (SIC 42120).
How old is MJJ Welding Limited?
MJJ Welding Limited was incorporated on 8 September 2021, 5 years ago.
What is the penalty if MJJ Welding 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 MJJ Welding 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.