S1MMM0UK Ltd
- Company number
- 08992115
- Incorporated
- 11 Apr 201412 years trading
- Registered office
- 20 Ashfield Grove, Stainforth, Doncaster, DN7 5EG
- Nature of business
- Repair and maintenance of other transport equipment n.e.c.
S1MMM0UK Ltd is a 12-year-old private limited company registered in Doncaster, company number 08992115, one of 137 machinery repair and installation companies in Doncaster. 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 down £24K (-31.9%) on the year before, to £50K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £51K against £3,801 owed within a year: more than 10 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £50K | £51K | £3,801 | 2 | |
| 31 Mar 2025 | £74K | £83K | £12K | 1 | |
| 31 Mar 2024 | £61K | £69K | £11K | 2 | |
| 31 Mar 2023 | £46K | £51K | 1 | ||
| 31 Mar 2022 | £82K | £99K | £19K | 1 | |
| 31 Mar 2021 | £54K | £68K | £16K | 1 | |
| 31 Mar 2020 | £135K | £148K | £14K | 1 | |
| 31 May 2019 | £121K | £131K | £10K | 1 | |
| 31 May 2018 | £92K | £95K | £4,817 | 1 | |
| 31 May 2017 | £82K | £86K | £5,120 |
Where S1MMM0UK Ltd is registered
The registered office is in Doncaster (DN7), in the Doncaster local authority area, Yorkshire and The Humber. Show DN7 5EG on a map.
Other trade companies in DN7
- H29 Construction LtdBuilders
- South Yorkshire Material Testing LimitedSpecialist contractors
- Ckinfrastructure LtdBuilders
- Ada Installations LimitedElectricians
- JKT Commercial Services LimitedMechanics and garages
- Used Cars Club LtdMotor traders
- Elite Van Group LtdMotor traders
- BJN Mobile Mechanic LtdMechanics and garages
What happens if S1MMM0UK 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 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
- 08992115
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 April 2014 (12 years ago)
- Registered office
- 20 Ashfield Grove, Stainforth, Doncaster, DN7 5EG
- Nature of business
- Repair and maintenance of other transport equipment n.e.c. (SIC 33170)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 2 July 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 Doncaster
Other active machinery repair and installation companies registered in Doncaster.
- Safe Circuit Solutions Ltd2023
- Scarr L.E.V Services Limited2015
- Scratch Music and Install Limited2001
- Servehigh Maintenance Services Limited2000
- Sharvillefabrication Ltd2025
- Shelbourne Engineering Limited2015
- SNB Installations Limited2012
- Sonko Electricals Ltd2024
All machinery repair and installation companies in Doncaster · All trades in Doncaster · Machinery repair and installation across the UK
Frequently asked questions
When are S1MMM0UK Ltd's accounts due?
S1MMM0UK Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is S1MMM0UK Ltd'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 S1MMM0UK Ltd still trading?
S1MMM0UK 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 S1MMM0UK Ltd do?
S1MMM0UK Ltd is registered under Repair and maintenance of other transport equipment n.e.c. (SIC 33170).
How old is S1MMM0UK Ltd?
S1MMM0UK Ltd was incorporated on 11 April 2014, 12 years ago.
What is the penalty if S1MMM0UK 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 S1MMM0UK 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.