- Companies
- Machinery repair and installation
- Swansea
- Electro-Harmonix UK Limited
Electro-Harmonix UK Limited
- Company number
- 07578737
- Incorporated
- 25 Mar 201115 years trading
- Registered office
- 13 Cwmdonkin Terrace, Swansea, SA2 0RQ
- Nature of business
- Repair of electronic and optical equipment; Repair of consumer electronics
Electro-Harmonix UK Limited is a 15-year-old private limited company registered in Swansea, company number 07578737, one of 98 machinery repair and installation companies in Swansea. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 Electro-Harmonix UK 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 £288K (-37.6%) on the year before, to £479K.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £579K against £100K owed within a year: 5.8 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £479K | £46K | £579K | £100K | 3 |
| 31 Dec 2024 | £767K | £436K | £999K | £232K | 3 |
| 31 Dec 2023 | £851K | £149K | £866K | £15K | 3 |
| 31 Dec 2022 | £888K | £400K | £957K | £69K | 3 |
| 31 Dec 2021 | £869K | £517K | £1M | £153K | 3 |
| 31 Dec 2020 | £566K | £386K | £751K | £184K | 3 |
| 31 Dec 2019 | £362K | £212K | £565K | £204K | 3 |
| 31 Dec 2018 | £240K | £122K | £522K | £281K | 3 |
| 31 Dec 2017 | -£5,612 | £93K | £285K | £291K | 3 |
| 31 Dec 2015 | -£111K | £4,108 | £81K | £192K |
Where Electro-Harmonix UK Limited is registered
The registered office is in Swansea (SA2), in the Swansea local authority area, Wales. Show SA2 0RQ on a map.
Other trade companies in SA2
- Living Landscapes Commercial LtdLandscapers and gardeners
- DC Plumbing & Construction LtdBuilders
- Ginger Property Services LimitedProperty developers
- Smart Space Living LtdJoiners and carpenters
- Paul Vernon HV Sap LimitedCivil engineering
- L.H Hiab & Recovery LimitedMechanics and garages
- Lewis Tarmac LtdCivil engineering
- Tolzini Cleaning Services LtdCleaning companies
What happens if Electro-Harmonix UK 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 07578737
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 March 2011 (15 years ago)
- Registered office
- 13 Cwmdonkin Terrace, Swansea, SA2 0RQ
- Nature of business
- Repair of electronic and optical equipment (SIC 33130)
Repair of consumer electronics (SIC 95210) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 25 March 2026
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in Swansea
Other active machinery repair and installation companies registered in Swansea.
- Electrotech Vending Ltd2012
- Elevating Excellence Limited2004
- Enterprise Direct (Swansea) Limited2018
- Enviroteq Limited2011
- Equipment Services & Engineering Limited2003
- Fak Engineering Ltd2026
- Felindre Innovations Repairs Servicing & Tackle Ltd2016
- Fire Check UK Ltd2026
All machinery repair and installation companies in Swansea · All trades in Swansea · Machinery repair and installation across the UK
Frequently asked questions
When are Electro-Harmonix UK Limited's accounts due?
Electro-Harmonix UK Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Electro-Harmonix UK Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Electro-Harmonix UK Limited still trading?
Electro-Harmonix UK 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 Electro-Harmonix UK Limited do?
Electro-Harmonix UK Limited is registered under Repair of electronic and optical equipment (SIC 33130); Repair of consumer electronics (SIC 95210).
How old is Electro-Harmonix UK Limited?
Electro-Harmonix UK Limited was incorporated on 25 March 2011, 15 years ago.
What is the penalty if Electro-Harmonix UK 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 Electro-Harmonix UK 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.