- Companies
- Property developers
- Maidenhead
- Information Security Systems Limited
Information Security Systems Limited
- Company number
- 04823920
- Incorporated
- 7 Jul 200323 years trading
- Registered office
- 11 Castle Hill, Maidenhead, Berkshire, SL6 4AA
- Nature of business
- Development of building projects; Other telecommunications activities; Buying and selling of own real estate
Information Security Systems Limited is a 23-year-old private limited company registered in Maidenhead, company number 04823920, one of 117 property development companies in Maidenhead. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £4,924 (+40.4%) on the year before, to £17K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £20K against £4,183 owed within a year: 4.8 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 Jul 2025 | £17K | £20K | £20K | £4,183 | 0 |
| 31 Jul 2024 | £12K | £19K | £20K | £9,161 | 2 |
| 31 Jul 2023 | £231K | £231K | £240K | £11K | 2 |
| 31 Jul 2022 | £348K | £208K | £232K | £22K | 2 |
| 31 Jul 2021 | £361K | £86K | £90K | £36K | 2 |
| 31 Jul 2020 | £330K | £19K | £34K | £7,435 | 2 |
| 31 Jul 2019 | £357K | £74K | £99K | £45K | 2 |
| 31 Jul 2018 | £420K | £74K | £131K | £14K | 3 |
| 31 Jul 2017 | £394K | £18K | £179K | £98K | 2 |
| 31 Jul 2016 | £462K | £159K | £303K | £157K |
Public contracts won
Information Security Systems Limited has one public sector contract award on record; the ones with their own published value total £31K (2017). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Crown Commercial Service | DCLG Brent Telephony Support | £31K | 31 Mar 2017 |
Where Information Security Systems Limited is registered
The registered office is in Maidenhead (SL6), in the Windsor and Maidenhead local authority area, South East. Show SL6 4AA on a map.
Other trade companies in SL6
- B&M Cleaning Solutions LtdCleaning companies
- CC Garden Builds LtdBuilders
- Austin Groundwork Surfaces LimitedGroundworks and demolition
- Woodnest Interiors LtdJoiners and carpenters
- Carizmatic Company LimitedMotor traders
- Sakura Electrical LtdElectricians
- Elite Autos & Tyres LtdMotor traders
- Bigfrith End LtdSpecialist contractors
Shared registered office
51 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 Information Security Systems 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 04823920
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 July 2003 (23 years ago)
- Registered office
- 11 Castle Hill, Maidenhead, Berkshire, SL6 4AA
- Nature of business
- Development of building projects (SIC 41100)
Other telecommunications activities (SIC 61900)
Buying and selling of own real estate (SIC 68100) - Year end
- 31 July (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 4 September 2026
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Maidenhead
Other active property development companies registered in Maidenhead.
- J Powell Property Holdings Ltd2025
- Lakelands Construction Limited2011
- Landstock Construction Ltd2004
- Logos Scientific Engineering Ltd2021
- Mindbrick Ltd2021
- Mitchla Management Limited2022
- MJ Property Developments Limited2011
- MKS Brickwork Ltd2025
All property development companies in Maidenhead · All trades in Maidenhead · Property developers across the UK
Frequently asked questions
When are Information Security Systems Limited's accounts due?
Information Security Systems Limited's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Information Security Systems Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Information Security Systems Limited still trading?
Information Security Systems 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 Information Security Systems Limited do?
Information Security Systems Limited is registered under Development of building projects (SIC 41100); Other telecommunications activities (SIC 61900); Buying and selling of own real estate (SIC 68100).
How old is Information Security Systems Limited?
Information Security Systems Limited was incorporated on 7 July 2003, 23 years ago.
Has Information Security Systems Limited won public sector contracts?
Yes. Information Security Systems Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £31K), most recently from Crown Commercial Service.
What is the penalty if Information Security Systems 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 Information Security Systems 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.