- Companies
- Plumbers and heating engineers
- Leeds
- Bi Calculator Ltd
Bi Calculator Ltd
- Company number
- 09171226
- Incorporated
- 12 Aug 201412 years trading
- Registered office
- 30 Greenthorpe Hill, 30 Greenthorpe Hill, Leeds, LS13 4LU
- Nature of business
- Plumbing, heat and air-conditioning installation
Bi Calculator Ltd is a 12-year-old private limited company registered in Leeds, company number 09171226, one of 357 plumbing and heating companies in Leeds. Its next accounts are due at Companies House on 31 May 2028, and the CT600 for the period to 31 August 2027 is due at HMRC on 31 August 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 down £4,453 (-5.7%) on the year before, to £73K.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2015 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2026 | £73K | £68K | £0 | 1 | |
| 31 Aug 2025 | £78K | £78K | £122 | 1 | |
| 31 Aug 2024 | £55K | £56K | £1,298 | 1 | |
| 31 Aug 2023 | £30K | £35K | £4,622 | 1 | |
| 31 Aug 2022 | £34K | £35K | £864 | 1 | |
| 31 Aug 2021 | £30K | £35K | £5,766 | 1 | |
| 31 Aug 2020 | £0 | £0 | £0 | 1 | |
| 31 Aug 2017 | £100 | £100 | |||
| 31 Aug 2016 | £100 | £100 | |||
| 31 Aug 2015 | £100 | £100 |
Where Bi Calculator Ltd is registered
The registered office is in Leeds (LS13), in the Leeds local authority area, Yorkshire and The Humber. Show LS13 4LU on a map.
Other trade companies in LS13
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- High-Level Roofing & Building Services LtdRoofers
- Leeds & Bradford Lanscapes. LtdLandscapers and gardeners
- H2O Exterior Cleaning Solutions LtdCleaning companies
- Lyrical Cleansing LtdCleaning companies
- Calverleyleeds Car Sell LtdMotor traders
- White Rose Property Maintenance & Compliance LtdSpecialist contractors
- Ojg Joinery & Landscaping LtdJoiners and carpenters
What happens if Bi Calculator Ltd 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 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2028 to 30 Jun 2028 | £150 |
| 1 to 3 months late | 1 Jul 2028 to 31 Aug 2028 | £375 |
| 3 to 6 months late | 1 Sep 2028 to 30 Nov 2028 | £750 |
| More than 6 months late | From 1 Dec 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 09171226
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 August 2014 (12 years ago)
- Registered office
- 30 Greenthorpe Hill, 30 Greenthorpe Hill, Leeds, LS13 4LU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2026
- Last confirmation statement
- 13 July 2026
- Previous names
- Bi Accounting Ltd (until 25 Sep 2014)
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Leeds
Other active plumbing and heating companies registered in Leeds.
- Biogreen Solutions Ltd2011
- Blay's Plumbing & Heating Ltd2012
- Blaymires Plumbing & Heating Limited2018
- Bliss Bathrooms Limited2025
- Blue Wire Facilities Management Limited2025
- Boiler & Heating Supplies Limited1994
- Boiler Flow Ltd2026
- Boilerswaps Ltd2026
All plumbing and heating companies in Leeds · All trades in Leeds · Plumbers and heating engineers across the UK
Frequently asked questions
When are Bi Calculator Ltd's accounts due?
Bi Calculator Ltd's next accounts are due at Companies House by 31 May 2028 (in 596 days), covering the period to 31 August 2027.
When is Bi Calculator Ltd's CT600 due?
The CT600 for the period to 31 August 2027 is due at HMRC by 31 August 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2028.
Is Bi Calculator Ltd still trading?
Bi Calculator Ltd 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 Bi Calculator Ltd do?
Bi Calculator Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Bi Calculator Ltd?
Bi Calculator Ltd was incorporated on 12 August 2014, 12 years ago.
What is the penalty if Bi Calculator Ltd 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 Bi Calculator Ltd 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.