- Companies
- Cleaning companies
- Zi Technical Services Ltd.
Zi Technical Services Ltd.
- Company number
- 03534973
- Incorporated
- 25 Mar 199828 years trading
- Registered office
- 34 Cumberland Road, London, SE25 4RE
- Nature of business
- Specialised cleaning services
Zi Technical Services Ltd. is a 28-year-old private limited company, company number 03534973, one of the UK's cleaning companies. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £14K (+2.7%) on the year before, to £525K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £220K against £91K owed within a year: 2.4 times cover.
- 40 employees on average, up from 35 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 May 2025 | £525K | £152K | £220K | £91K | 40 |
| 31 May 2024 | £511K | £141K | £187K | £82K | 35 |
| 31 May 2023 | £479K | £117K | £157K | £74K | 51 |
| 31 May 2022 | £448K | £90K | £139K | £70K | 51 |
| 31 May 2021 | £427K | £123K | £172K | £113K | 51 |
| 31 May 2020 | £395K | £84K | £154K | £105K | 52 |
| 31 May 2019 | £361K | £78K | £135K | £99K | 55 |
| 31 May 2018 | £327K | £60K | £106K | £85K | |
| 31 May 2017 | £335K | £92K | £134K | £83K | |
| 31 May 2016 | £381K | £127K | £176K | £76K |
Where Zi Technical Services Ltd. is registered
The registered office is in the SE25 postcode district, in the Croydon local authority area, London. Show SE25 4RE on a map.
Other trade companies in SE25
- Luna Plumbing LtdPlumbers and heating engineers
- Mendivra LtdJoiners and carpenters
- Squeaky Mastery Services LtdCleaning companies
- MM(P)M LtdProperty developers
- Meysam Electrical LtdElectricians
- Madej Property Maintenance LtdFinishing trades
- Leonardo Bespoke Joinery LtdJoiners and carpenters
- GCS Electrical Services LimitedElectricians
What happens if Zi Technical Services 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 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
- 03534973
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 March 1998 (28 years ago)
- Registered office
- 34 Cumberland Road, London, SE25 4RE
- Nature of business
- Specialised cleaning services (SIC 81222)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 25 January 2026
- Charges (mortgages)
- 3 outstanding of 3 registered
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
Other active cleaning companies.
Frequently asked questions
When are Zi Technical Services Ltd.'s accounts due?
Zi Technical Services Ltd.'s next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is Zi Technical Services Ltd.'s CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Zi Technical Services Ltd. still trading?
Zi Technical Services 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 Zi Technical Services Ltd. do?
Zi Technical Services Ltd. is registered under Specialised cleaning services (SIC 81222).
How old is Zi Technical Services Ltd.?
Zi Technical Services Ltd. was incorporated on 25 March 1998, 28 years ago.
What is the penalty if Zi Technical Services 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 Zi Technical Services 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.