- Company number
- 09888880
- Incorporated
- 25 Nov 201510 years trading
- Registered office
- 43 Ashtree Avenue, Mitcham, CR4 3DS
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
Proficient Installation Limited is a 10-year-old private limited company registered in Mitcham, company number 09888880, one of 205 building contractors in Mitcham. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 Proficient Installation 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 £1,240 (-67.1%) on the year before, to £609.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £72K against £49K owed within a year: 1.5 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £609 | £72K | £49K | 1 | |
| 30 Nov 2024 | £1,849 | £22K | £67K | £18K | 1 |
| 30 Nov 2023 | -£20K | £63K | £68K | 1 | |
| 30 Nov 2022 | £1,353 | £24K | £61K | £41K | 1 |
| 30 Nov 2021 | -£30K | £20K | £22K | £17K | 1 |
| 30 Nov 2020 | -£22K | £32K | £35K | £14K | 1 |
| 30 Nov 2019 | £10 | £4,859 | £36K | £24K | 1 |
| 30 Nov 2018 | £14K | £39K | £50K | £20K | |
| 30 Nov 2017 | £26K | £35K | £69K | £23K | |
| 30 Nov 2016 | £25K | £3,543 | £42K | £18K |
Where Proficient Installation Limited is registered
The registered office is in Mitcham (CR4), in the Merton local authority area, London. Show CR4 3DS on a map.
Other trade companies in CR4
- Mendevo LimitedFloor and wall tilers
- Az Auto Body Repair LtdMechanics and garages
- Welcome Maintenance LimitedPainters and decorators
- Fixmot LtdMechanics and garages
- MPB Property Care LtdFinishing trades
- Aoo Building Services LtdBuilders
- LDN Plumbing Heating and Cooling LimitedPlumbers and heating engineers
- Dgha Construction LtdBuilders
What happens if Proficient Installation 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 09888880
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 November 2015 (10 years ago)
- Registered office
- 43 Ashtree Avenue, Mitcham, CR4 3DS
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 24 November 2025
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Mitcham
Other active building contractors registered in Mitcham.
- Project Connex Ltd2023
- Propure Design Ltd2016
- Rana Kash Builders Ltd2021
- Razc Ltd2025
- RBB Builders Ltd2025
- RBB Building Ltd2015
- Remi Construction Ltd2021
- Renovation X Ltd2017
All building contractors in Mitcham · All trades in Mitcham · Builders across the UK
Frequently asked questions
When are Proficient Installation Limited's accounts due?
Proficient Installation Limited's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Proficient Installation Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Proficient Installation Limited still trading?
Proficient Installation 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 Proficient Installation Limited do?
Proficient Installation Limited is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is Proficient Installation Limited?
Proficient Installation Limited was incorporated on 25 November 2015, 10 years ago.
What is the penalty if Proficient Installation 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 Proficient Installation 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.