- Companies
- Electricians
- Southampton
- Advantec Limited
Company profile · Electricians
Advantec Limited
Advantec Limited is a 20-year-old private limited company registered in Southampton, company number 05733764, one of 342 electrical contractors in Southampton. Its next accounts are due at Companies House on 28 December 2026, and the CT600 for the period to 28 March 2026 is due at HMRC on 28 March 2027.
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 Advantec LimitedOr 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.
Financial snapshot, 2025
From the balance sheet at 28 March 2025, as filed at Companies House.
Advantec Limited over the years
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 £844 (-38.5%) on the year before, to £1,346.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £10K against £8,801 owed within a year: 1.2 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Mar 2025 | £1,346 | £1,479 | £10K | £8,801 | 0 |
| 28 Mar 2024 | £2,190 | £2,889 | £12K | £9,367 | 2 |
| 28 Mar 2023 | £2,614 | £7,172 | £16K | £14K | 2 |
| 28 Mar 2022 | £9,048 | £12K | £22K | £19K | 2 |
| 28 Sep 2020 | £33K | £65K | £112K | £69K | 2 |
| 29 Sep 2019 | £55K | £53K | £113K | £81K | 2 |
| 29 Sep 2018 | £77K | £62K | £131K | £73K | 2 |
| 29 Sep 2017 | £64K | £51K | £123K | £80K | |
| 29 Sep 2016 | £63K | £56K | £151K | £92K | |
| 29 Sep 2015 | £36K | £37K | £107K | £74K |
Where Advantec Limited is registered
The registered office is in Southampton (SO14), in the Southampton local authority area, South East. Show SO14 3TJ on a map.
Other trade companies in SO14
- Cat Garage LtdMechanics and garages
- Sonix LtdBuilders
- Vanie & Dick LtdBuilders
- 33 Motors LtdMotor traders
- Pure Light Cleaning LtdCleaning companies
- Cccjr Trading LimitedMotor traders
- Otess LtdFloor and wall tilers
- Bevertex LimitedElectricians
Shared registered office
83 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Advantec 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 28 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 29 Dec 2026 to 28 Jan 2027 | £150 |
| 1 to 3 months late | 29 Jan 2027 to 28 Mar 2027 | £375 |
| 3 to 6 months late | 29 Mar 2027 to 28 Jun 2027 | £750 |
| More than 6 months late | From 29 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Mar 2027 | £200 |
| 3 months late | 28 Jun 2027 | another £200 |
| 6 months late | 28 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Mar 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
- 05733764
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 March 2006 (20 years ago)
- Registered office
- Tagus House, 9 Ocean Way, Southampton, Hampshire, SO14 3TJ
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 28 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 March 2025
- Last confirmation statement
- 1 March 2026
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Southampton
Other active electrical contractors registered in Southampton.
- Aerotherm Solutions Limited2025
- Aij Electrics Limited2014
- Alight Aspects Ltd2010
- All Bright Electrical Limited2004
- Aln Electrical Services Ltd2016
- Alr Electrical Services Ltd2015
- Alt Designer Ltd2025
- Am Young Electrical Limited2023
All electrical contractors in Southampton · All trades in Southampton · Electricians across the UK
Frequently asked questions
When are Advantec Limited's accounts due?
Advantec Limited's next accounts are due at Companies House by 28 December 2026 (in 77 days), covering the period to 28 March 2026.
When is Advantec Limited's CT600 due?
The CT600 for the period to 28 March 2026 is due at HMRC by 28 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 29 December 2026.
Is Advantec Limited still trading?
Advantec 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 Advantec Limited do?
Advantec Limited is registered under Electrical installation (SIC 43210).
How old is Advantec Limited?
Advantec Limited was incorporated on 7 March 2006, 20 years ago.
What is the penalty if Advantec 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 Advantec 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.