- Companies
- Mechanics and garages
- Porthmadog
- Gta Diagnostix Limited
Gta Diagnostix Limited
- Company number
- 10742510
- Incorporated
- 26 Apr 20179 years trading
- Registered office
- Madog Motor Museum, Snowdon Street, Porthmadog, LL49 9DF
- Nature of business
- Maintenance and repair of motor vehicles
Gta Diagnostix Limited is a 9-year-old private limited company registered in Porthmadog, company number 10742510, one of 7 vehicle repair garages in Porthmadog. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £14K (+15.6%) on the year before, to £106K.
- Net assets rose in 6 of 8 year-on-year comparisons on record.
- Current assets of £118K against £44K owed within a year: 2.7 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 9 years, 2018 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £106K | £118K | £44K | 3 | |
| 31 Mar 2025 | £91K | £120K | £49K | 3 | |
| 31 Mar 2024 | £70K | £94K | £48K | 3 | |
| 31 Mar 2023 | £76K | £115K | £56K | 3 | |
| 31 Mar 2022 | £66K | £122K | £72K | 3 | |
| 31 Mar 2021 | £53K | £101K | £63K | 6 | |
| 31 Mar 2020 | £29K | £43K | £69K | 5 | |
| 31 Mar 2019 | -£100 | -£100 | 1 | ||
| 30 Apr 2018 | -£100 | -£100 |
Where Gta Diagnostix Limited is registered
The registered office is in Porthmadog (LL49), in the Gwynedd local authority area, Wales. Show LL49 9DF on a map.
Other trade companies in LL49
- D.Thomas Electrical CyfElectricians
- N Commercial LtdMotor traders
- Bricsan CyfProperty developers
- White Diamond Windows LtdGlaziers
- Porthmadog No1 Hand Car Wash LtdCleaning companies
- Dragon Drone Surveys & Inspections LimitedGroundworks and demolition
- Cu Power LtdMachinery repair and installation
- Carwyn Ap Plymio A Gwresogi CyfPlumbers and heating engineers
What happens if Gta Diagnostix 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 10742510
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 April 2017 (9 years ago)
- Registered office
- Madog Motor Museum, Snowdon Street, Porthmadog, LL49 9DF
- Nature of business
- Maintenance and repair of motor vehicles (SIC 45200)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 12 April 2026
Filing notes for vehicle repair garages
Garages hold parts stock and often own diagnostic equipment and ramps, which qualify for capital allowances.
Similar companies in Porthmadog
Other active vehicle repair garages registered in Porthmadog.
- J M Hughes A'i Feibion Cyf2014
- Mike's Garage (Llandygai) Ltd2014
- Moduron H G Jones Motors Limited2011
- S & B Roberts Ltd2014
- Tegfan Garage Ltd2014
- A E Motors Ltd2013
All vehicle repair garages in Porthmadog · All trades in Porthmadog · Mechanics and garages across the UK
Frequently asked questions
When are Gta Diagnostix Limited's accounts due?
Gta Diagnostix Limited's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Gta Diagnostix Limited's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Gta Diagnostix Limited still trading?
Gta Diagnostix 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 Gta Diagnostix Limited do?
Gta Diagnostix Limited is registered under Maintenance and repair of motor vehicles (SIC 45200).
How old is Gta Diagnostix Limited?
Gta Diagnostix Limited was incorporated on 26 April 2017, 9 years ago.
What is the penalty if Gta Diagnostix 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 Gta Diagnostix 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.