- Companies
- Civil engineering
- S B M Rail Limited
S B M Rail Limited
- Company number
- 09342183
- Incorporated
- 5 Dec 201411 years trading
- Registered office
- C/O Ascot Drummond, Devonshire House, Manor Way, Borehamwood, Hertfordshire, WD6 1QQ
- Nature of business
- Construction of railways and underground railways
S B M Rail Limited is a 11-year-old private limited company registered in Hertfordshire, company number 09342183, one of the UK's civil engineering contractors. Companies House shows its accounts as overdue: they were due on 30 September 2026.
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 £209 (+116.1%) on the year before, to £389.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £21K against £34K owed within a year: 0.6 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2024 | £389 | £21K | £34K | 2 | |
| 31 Dec 2023 | £180 | £29K | £34K | 2 | |
| 31 Dec 2022 | £151 | £23K | £22K | 2 | |
| 31 Dec 2021 | £171 | £49K | £27K | 2 | |
| 31 Dec 2020 | £86 | £46K | £26K | 2 | |
| 31 Dec 2019 | £2,819 | £24K | £22K | 2 | |
| 31 Dec 2018 | £405 | £20K | £20K | ||
| 31 Dec 2017 | £20K | £39K | £19K | ||
| 31 Dec 2016 | £9,491 | £27K | £19K | ||
| 31 Dec 2015 | £7,795 | £26K | £26K | £19K |
Where S B M Rail Limited is registered
The registered office is in Hertfordshire (WD6), in the Hertsmere local authority area, East of England. Show WD6 1QQ on a map.
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Also registered at this address
1 other company uses the same registered office as S B M Rail Limited.
- Propzsspace LtdBuilders
What happens if S B M Rail Limited files late
If the accounts reach Companies House today, the late filing penalty is £150 (£300 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2026 to 31 Oct 2026 | £150 |
| 1 to 3 months late | 1 Nov 2026 to 31 Dec 2026 | £375 |
| 3 to 6 months late | 1 Jan 2027 to 31 Mar 2027 | £750 |
| More than 6 months late | From 1 Apr 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2027 | £200 |
| 3 months late | 31 Mar 2027 | another £200 |
| 6 months late | 30 Jun 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 2027 | 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
- 09342183
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 December 2014 (11 years ago)
- Registered office
- C/O Ascot Drummond, Devonshire House, Manor Way, Borehamwood, Hertfordshire, WD6 1QQ
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2024
- Last confirmation statement
- 6 December 2025
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies
Other active civil engineering contractors.
Frequently asked questions
When are S B M Rail Limited's accounts due?
S B M Rail Limited's accounts were due at Companies House on 30 September 2026 and the register shows them as overdue.
When is S B M Rail Limited's CT600 due?
The CT600 for the period to 31 December 2025 is due at HMRC by 31 December 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2026.
Is S B M Rail Limited still trading?
S B M Rail Limited is listed as active on the Companies House register (checked 13 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 S B M Rail Limited do?
S B M Rail Limited is registered under Construction of railways and underground railways (SIC 42120).
How old is S B M Rail Limited?
S B M Rail Limited was incorporated on 5 December 2014, 11 years ago.
What is the penalty if S B M Rail 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 S B M Rail Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.