- Companies
- Electricians
- Swansea
- RTB Electrical Services Limited
RTB Electrical Services Limited
- Company number
- 10824696
- Incorporated
- 19 Jun 20179 years trading
- Registered office
- 37 Gendros Avenue West, Gendros, Swansea, SA5 8BX
- Nature of business
- Electrical installation
RTB Electrical Services Limited is a 9-year-old private limited company registered in Swansea, company number 10824696, one of 148 electrical contractors in Swansea. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £20K (+388.4%) on the year before, to £14K.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £12K against £5,748 owed within a year: 2.2 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 6 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £14K | £12K | £5,748 | 1 | |
| 30 Jun 2024 | -£5,024 | £30 | £5,663 | 1 | |
| 30 Jun 2023 | -£4,824 | £1 | £1 | £5,634 | 1 |
| 30 Jun 2022 | £4,324 | £2,670 | £8,303 | 1 | |
| 30 Jun 2021 | £3,087 | £6,016 | £4,116 | 1 | |
| 30 Jun 2018 | £69 | £7,264 | £6,670 | 1 |
Where RTB Electrical Services Limited is registered
The registered office is in Swansea (SA5), in the Swansea local authority area, Wales. Show SA5 8BX on a map.
Other trade companies in SA5
- Lee.T73 Rail LtdCivil engineering
- LJ Cleaning Swansea LimitedCleaning companies
- Same Day Roof Repairs Swansea LtdRoofers
- Warlow&Co LimitedProperty developers
- RNJ Vehicle Repairs LtdMechanics and garages
- Erj's Recovery and Transportation LtdMotor traders
- Brandrick Group LimitedElectricians
- Chris Chambers Holdings LimitedElectricians
What happens if RTB Electrical Services 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 10824696
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 June 2017 (9 years ago)
- Registered office
- 37 Gendros Avenue West, Gendros, Swansea, SA5 8BX
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 16 June 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 in Swansea
Other active electrical contractors registered in Swansea.
- Sah Electrical (South Wales) Limited2018
- Sean Ltd2010
- SJC Electrical Contractors Ltd2023
- SKR Electrical Solutions Ltd2022
- Sky Blue Solar Ltd2023
- Solair Solutions Ltd2022
- Solarcentric Renewables Limited2020
- Sowden Agri Limited2024
All electrical contractors in Swansea · All trades in Swansea · Electricians across the UK
Frequently asked questions
When are RTB Electrical Services Limited's accounts due?
RTB Electrical Services Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is RTB Electrical Services Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is RTB Electrical Services Limited still trading?
RTB Electrical Services 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 RTB Electrical Services Limited do?
RTB Electrical Services Limited is registered under Electrical installation (SIC 43210).
How old is RTB Electrical Services Limited?
RTB Electrical Services Limited was incorporated on 19 June 2017, 9 years ago.
What is the penalty if RTB Electrical Services 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 RTB Electrical Services 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.