- Companies
- Machinery repair and installation
- Bishop's Stortford
- Sine-Wave Services Limited
Sine-Wave Services Limited
- Company number
- 05824272
- Incorporated
- 22 May 200620 years trading
- Registered office
- C/O Redbox Accountancy Limited, New Mead Barn, Wickham Hall Hadham Road, Bishop's Stortford, Herts, CM23 1JG
- Nature of business
- Repair of electrical equipment; Electrical installation; Other professional, scientific and technical activities n.e.c.
Sine-Wave Services Limited is a 20-year-old private limited company registered in Bishop's Stortford, company number 05824272, one of 24 machinery repair and installation companies in Bishop's Stortford. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 2027.
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 £477K (+16.9%) on the year before, to £3.3M.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £2.6M against £195K owed within a year: more than 10 times cover.
- 3 employees on average, up from 2 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Aug 2025 | £3.3M | £2.3M | £2.6M | £195K | 3 |
| 31 Aug 2024 | £2.8M | £2M | £2.2M | £369K | 2 |
| 31 Aug 2023 | £2.9M | £2.1M | £2.4M | £299K | 2 |
| 31 Aug 2022 | £2.6M | £1.8M | £2M | £317K | 2 |
| 31 Aug 2021 | £2.2M | £1.4M | £1.6M | £368K | 2 |
| 31 Aug 2020 | £2.1M | £1.5M | £1.8M | £296K | 2 |
| 31 Aug 2019 | £1.8M | £1.1M | £1.5M | £299K | 2 |
| 31 Aug 2018 | £1.5M | £778K | £1.2M | £307K | 2 |
| 31 Aug 2017 | £1.4M | £699K | £1M | £316K | 2 |
| 31 Aug 2016 | £1.2M | £572K | £834K | £345K |
Where Sine-Wave Services Limited is registered
The registered office is in Bishop's Stortford (CM23), in the East Hertfordshire local authority area, East of England. Show CM23 1JG on a map.
Other trade companies in CM23
- Virtual Bee Property Development LtdProperty developers
- Cerberus (Compliance & Maintain) LimitedInstallers
- Cerberus (Electrical & Renewables) LimitedInstallers
- Bishop's Stortford Tyres Hub LimitedMechanics and garages
- Da Power LtdElectricians
- Henry Daniel Building Co LtdBuilders
- Wolfe Services LimitedMachinery repair and installation
- Bells Exterior Services LimitedCleaning companies
What happens if Sine-Wave Services 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 05824272
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 May 2006 (20 years ago)
- Registered office
- C/O Redbox Accountancy Limited, New Mead Barn, Wickham Hall Hadham Road, Bishop's Stortford, Herts, CM23 1JG
- Nature of business
- Repair of electrical equipment (SIC 33140)
Electrical installation (SIC 43210)
Other professional, scientific and technical activities n.e.c. (SIC 74909) - Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 9 May 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 Bishop's Stortford
Other active machinery repair and installation companies registered in Bishop's Stortford.
- Southern Helicopters Limited1994
- Stansted Aerospace Limited2004
- Anglia Plant and Equipment Services Ltd2018
- Appliance Breakdown Service Limited1996
- B2&B1 Management Ltd2025
- BMSD Ltd2015
- BTS Maintenance Ltd2020
- CC Engineering Ltd2025
All machinery repair and installation companies in Bishop's Stortford · All trades in Bishop's Stortford · Machinery repair and installation across the UK
Frequently asked questions
When are Sine-Wave Services Limited's accounts due?
Sine-Wave Services Limited's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Sine-Wave Services Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Sine-Wave Services Limited still trading?
Sine-Wave Services 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 Sine-Wave Services Limited do?
Sine-Wave Services Limited is registered under Repair of electrical equipment (SIC 33140); Electrical installation (SIC 43210); Other professional, scientific and technical activities n.e.c. (SIC 74909).
How old is Sine-Wave Services Limited?
Sine-Wave Services Limited was incorporated on 22 May 2006, 20 years ago.
What is the penalty if Sine-Wave Services 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 Sine-Wave Services 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.