- Companies
- Specialist contractors
- Colchester
- Si Consultancy Services Ltd
Si Consultancy Services Ltd
- Company number
- 11858900
- Incorporated
- 4 Mar 20197 years trading
- Registered office
- 8 Corporal Close, Colchester, CO2 7GT
- Nature of business
- Other specialised construction activities n.e.c.; specialised design activities; Other professional, scientific and technical activities n.e.c.
Si Consultancy Services Ltd is a 7-year-old private limited company registered in Colchester, company number 11858900, one of 184 specialist construction companies in Colchester. 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.
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 Si Consultancy Services LtdOr 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 up £8,129 (+115.1%) on the year before, to £1,068.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £3,905 against £3,704 owed within a year: 1.1 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 7 years, 2020 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £1,068 | £3,905 | £3,704 | 1 | |
| 31 Mar 2025 | -£7,061 | £4 | £14K | £21K | 1 |
| 31 Mar 2024 | £180 | £1,827 | £22K | £15K | 0 |
| 31 Mar 2023 | £475 | £1,729 | £20K | £5,614 | 2 |
| 31 Mar 2022 | £656 | £24K | £5,270 | 2 | |
| 31 Mar 2021 | £553 | £32K | £10K | 1 | |
| 31 Mar 2020 | £402 | £8,129 | £8,071 | 1 |
Where Si Consultancy Services Ltd is registered
The registered office is in Colchester (CO2), in the Colchester local authority area, East of England. Show CO2 7GT on a map.
Other trade companies in CO2
- Bravoryx Construct LtdSpecialist contractors
- VSG Projects Group LtdBuilders
- SBVC Auto Centre LtdMechanics and garages
- Matangi Auto Parts LtdMotor traders
- Able Renewables UK LtdInstallers
- GVV Ltd LtdBuilders
- CW Interior Transformations LtdFinishing trades
- Dynamic HV LtdCivil engineering
What happens if Si Consultancy Services 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
- 11858900
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 March 2019 (7 years ago)
- Registered office
- 8 Corporal Close, Colchester, CO2 7GT
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
specialised design activities (SIC 74100)
Other professional, scientific and technical activities n.e.c. (SIC 74909) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 30 July 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Colchester
Other active specialist construction companies registered in Colchester.
- Sibbons (Alresford) Limited1964
- Site Training Inspection & Compliance Service Limited2015
- SJP Projects & Design Ltd2026
- SLTC Maintenance Limited2024
- Softview Conservatories Windows & Doors Limited1996
- Spro Solutions Ltd2025
- STC Contracts Limited2012
- Steven James Building Supplies Limited2017
All specialist construction companies in Colchester · All trades in Colchester · Specialist contractors across the UK
Frequently asked questions
When are Si Consultancy Services Ltd's accounts due?
Si Consultancy Services Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Si Consultancy Services 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 Si Consultancy Services Ltd still trading?
Si Consultancy Services 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 Si Consultancy Services Ltd do?
Si Consultancy Services Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); specialised design activities (SIC 74100); Other professional, scientific and technical activities n.e.c. (SIC 74909).
How old is Si Consultancy Services Ltd?
Si Consultancy Services Ltd was incorporated on 4 March 2019, 7 years ago.
What is the penalty if Si Consultancy Services 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 Si Consultancy Services 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.