- Companies
- Electricians
- Slough
- Smartech Security Limited
Smartech Security Limited
- Company number
- 10271797
- Incorporated
- 11 Jul 201610 years trading
- Registered office
- 4A the Broadway, Farnham Common, Slough, SL2 3PQ
- Nature of business
- Electrical installation; Other construction installation; Security systems service activities
Smartech Security Limited is a 10-year-old private limited company registered in Slough, company number 10271797, one of 101 electrical contractors in Slough. 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.
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 Smartech Security LimitedOr 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 down £16K (-3.4%) on the year before, to £447K.
- Net assets rose in 6 of 8 year-on-year comparisons on record.
- Current assets of £116K against £100K owed within a year: 1.2 times cover.
- 8 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £447K | £75K | £116K | £100K | 8 |
| 31 Jul 2024 | £462K | £198K | £233K | £76K | 8 |
| 31 Jul 2023 | £351K | £106K | £187K | £54K | 7 |
| 31 Jul 2022 | £250K | £159K | £29K | 5 | |
| 31 Jul 2021 | £129K | £144K | £14K | 5 | |
| 31 Jul 2020 | £102K | £60K | £8,434 | 4 | |
| 31 Jul 2019 | £114K | £107K | £8,393 | 4 | |
| 31 Jul 2018 | £84K | £46K | £71K | £6,191 | |
| 31 Jul 2017 | £30K | £14K | £17K | £2,149 |
Where Smartech Security Limited is registered
The registered office is in Slough (SL2), in the Buckinghamshire local authority area, South East. Show SL2 3PQ on a map.
Other trade companies in SL2
- Selmani&Aj Developments LimitedBuilders
- SMKD LimitedMotor traders
- Sloughcleanings LtdCleaning companies
- Neal LtdBuilders
- J Nomah LtdBuilders
- Eton Motor Group LtdMotor traders
- All Perfect Services LtdBuilders
- Datchet Car Body Shop LtdMechanics and garages
What happens if Smartech Security 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
- 10271797
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 July 2016 (10 years ago)
- Registered office
- 4A the Broadway, Farnham Common, Slough, SL2 3PQ
- Nature of business
- Electrical installation (SIC 43210)
Other construction installation (SIC 43290)
Security systems service activities (SIC 80200) - Year end
- 31 July (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 31 July 2025
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Slough
Other active electrical contractors registered in Slough.
- Snelling Electrical Ltd2008
- Solener Ltd2013
- South Green Energy Ltd2022
- Ssjelectricalservices Ltd2022
- Sta Smart Homes Limited2021
- Symtech Services Limited2024
- Total Cover Limited1997
- Tri Management Limited2000
All electrical contractors in Slough · All trades in Slough · Electricians across the UK
Frequently asked questions
When are Smartech Security Limited's accounts due?
Smartech Security 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 Smartech Security 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 Smartech Security Limited still trading?
Smartech Security Limited is listed as active on the Companies House register (checked 13 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 Smartech Security Limited do?
Smartech Security Limited is registered under Electrical installation (SIC 43210); Other construction installation (SIC 43290); Security systems service activities (SIC 80200).
How old is Smartech Security Limited?
Smartech Security Limited was incorporated on 11 July 2016, 10 years ago.
What is the penalty if Smartech Security 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 Smartech Security Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.