- Companies
- Electricians
- Keystone Ats Limited
Keystone Ats Limited
- Company number
- 05517869
- Incorporated
- 25 Jul 200521 years trading
- Registered office
- 9 Woodlands Close, Bradley, Grange, Huddersfield, West Yorkshire, HD2 1QS
- Nature of business
- Electrical installation
Keystone Ats Limited is a 21-year-old private limited company registered in West Yorkshire, company number 05517869, one of the UK's electrical contractors. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £3,772 (+10.7%) on the year before, to -£32K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £1,049 against £898 owed within a year: 1.2 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 Aug 2025 | -£32K | £474 | £1,049 | £898 | 1 |
| 31 Aug 2024 | -£35K | £97 | £672 | £348 | 1 |
| 31 Aug 2023 | -£36K | £9,521 | £10K | £1,035 | 1 |
| 31 Aug 2022 | -£42K | £884 | £1,543 | £1,073 | 1 |
Where Keystone Ats Limited is registered
The registered office is in West Yorkshire (HD2), in the Kirklees local authority area, Yorkshire and The Humber. Show HD2 1QS on a map.
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What happens if Keystone Ats 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 31 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 05517869
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 July 2005 (21 years ago)
- Registered office
- 9 Woodlands Close, Bradley, Grange, Huddersfield, West Yorkshire, HD2 1QS
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 25 July 2026
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
Other active electrical contractors.
Frequently asked questions
When are Keystone Ats Limited's accounts due?
Keystone Ats Limited's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is Keystone Ats Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Keystone Ats Limited still trading?
Keystone Ats 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 Keystone Ats Limited do?
Keystone Ats Limited is registered under Electrical installation (SIC 43210).
How old is Keystone Ats Limited?
Keystone Ats Limited was incorporated on 25 July 2005, 21 years ago.
What is the penalty if Keystone Ats 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 Keystone Ats 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.