- Companies
- Specialist contractors
- Brackley
- Sudoku Steel Ltd
Sudoku Steel Ltd
- Company number
- 13213786
- Incorporated
- 19 Feb 20215 years trading
- Registered office
- 11B Boundary Road, Buckingham Road Industrial Estate, Brackley, Northants, NN13 7ES
- Nature of business
- Other specialised construction activities n.e.c.
Sudoku Steel Ltd is a 5-year-old private limited company registered in Brackley, company number 13213786, one of 7 specialist construction companies in Brackley. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the 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 Sudoku Steel 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.
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 £9,747 (+4.8%) on the year before, to £214K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £227K against £19K owed within a year: more than 10 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 Mar 2025 | £214K | £63K | £227K | £19K | 1 |
| 31 Mar 2024 | £205K | £77K | £221K | £24K | 1 |
| 31 Mar 2023 | £197K | £13K | £223K | £34K | 1 |
| 31 Mar 2022 | £87K | £97K | £122K | £40K | 1 |
Where Sudoku Steel Ltd is registered
The registered office is in Brackley (NN13), in the West Northamptonshire local authority area, East Midlands. Show NN13 7ES on a map.
Other trade companies in NN13
- Mystical Cleaning LtdCleaning companies
- D T Customs (Oxon) LimitedMechanics and garages
- Vale & Valley Homes LtdProperty developers
- Mill House Construction Services LtdCivil engineering
- Ryan Price Automotive LtdMechanics and garages
- Tailored Timber LtdJoiners and carpenters
- Almeida Cleaning Services LtdCleaning companies
- Underground Water Services LimitedSpecialist contractors
Shared registered office
46 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 Sudoku Steel 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 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
- 13213786
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 February 2021 (5 years ago)
- Registered office
- 11B Boundary Road, Buckingham Road Industrial Estate, Brackley, Northants, NN13 7ES
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 18 February 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 Brackley
Other active specialist construction companies registered in Brackley.
- T & C Construction Services (Northampton) Limited2013
- TJM Stone Walling Ltd2019
- Underground Water Services Limited2026
- M. Page Building Services Limited2013
- Munnelly Construction Limited2013
- Simat Limited2003
All specialist construction companies in Brackley · All trades in Brackley · Specialist contractors across the UK
Frequently asked questions
When are Sudoku Steel Ltd's accounts due?
Sudoku Steel Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Sudoku Steel Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Sudoku Steel Ltd still trading?
Sudoku Steel 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 Sudoku Steel Ltd do?
Sudoku Steel Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Sudoku Steel Ltd?
Sudoku Steel Ltd was incorporated on 19 February 2021, 5 years ago.
What is the penalty if Sudoku Steel 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 Sudoku Steel 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.