531 Ltd
- Company number
- 05991795
- Incorporated
- 8 Nov 200619 years trading
- Registered office
- 5 Monks Way, Southampton, SO18 2LR
- Nature of business
- Window cleaning services
531 Ltd is a 19-year-old private limited company registered in Southampton, company number 05991795, one of 274 cleaning companies in Southampton. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £2,454 (+29.3%) on the year before, to £11K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £13K against £3,583 owed within a year: 3.6 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £11K | £13K | £13K | £3,583 | 2 |
| 30 Nov 2024 | £8,366 | £12K | £12K | £9,571 | 2 |
| 30 Nov 2023 | £5,766 | £11K | £12K | 2 | |
| 30 Nov 2022 | £4,787 | £14K | £17K | 2 | |
| 30 Nov 2021 | £6,105 | £13K | £17K | 2 | |
| 30 Nov 2020 | £3,829 | £7,753 | £7,753 | £16K | 2 |
| 30 Nov 2019 | £66 | £3,485 | £4,323 | £18K | |
| 30 Nov 2018 | £391 | £1,190 | £1,060 | £2,238 | |
| 30 Nov 2017 | £641 | £1,505 | £2,065 | £3,494 | |
| 30 Nov 2016 | £3,581 | £2,586 | £3,611 | £3,313 |
Where 531 Ltd is registered
The registered office is in Southampton (SO18), in the Southampton local authority area, South East. Show SO18 2LR on a map.
Other trade companies in SO18
- Nationwide Steelfixing LtdBuilders
- Terraline LimitedSpecialist contractors
- Omni Group Holdings LtdSpecialist contractors
- Zammit Property Developments LtdProperty developers
- Shotton Marine LtdMachinery repair and installation
- Amiri Mobile Mechanic LtdMechanics and garages
- Roofing Building & Maintenance LtdSpecialist contractors
- The Tidy Life LtdCleaning companies
What happens if 531 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 05991795
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 November 2006 (19 years ago)
- Registered office
- 5 Monks Way, Southampton, SO18 2LR
- Nature of business
- Window cleaning services (SIC 81221)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 8 November 2025
Filing notes for cleaning companies
Cleaning companies are often staff-heavy, so wages, pension contributions and the employment allowance all show up in the accounts.
Similar companies in Southampton
Other active cleaning companies registered in Southampton.
- A Plus Clean Ltd2018
- A Plus Support Services Ltd2024
- A T Professional Facilities Services Ltd2023
- Ace Bin Cleaning Ltd2024
- Acol Cleaning & Hygiene Limited1994
- Acol Group Limited2019
- Adam Hand Car Valeting Ltd2024
- Advanced Clean Ltd2012
All cleaning companies in Southampton · All trades in Southampton · Cleaning companies across the UK
Frequently asked questions
When are 531 Ltd's accounts due?
531 Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is 531 Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is 531 Ltd still trading?
531 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 531 Ltd do?
531 Ltd is registered under Window cleaning services (SIC 81221).
How old is 531 Ltd?
531 Ltd was incorporated on 8 November 2006, 19 years ago.
What is the penalty if 531 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 531 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.