- Companies
- Motor traders
- Birmingham
- Mainstream Autos Limited
Mainstream Autos Limited
- Company number
- 13880608
- Incorporated
- 30 Jan 20224 years trading
- Registered office
- C/O Mainstream Accountancy Services, 527 Moseley Road, Birmingham, B12 9BU
- Nature of business
- Sale of used cars and light motor vehicles; Renting and leasing of cars and light motor vehicles
Mainstream Autos Limited is a 4-year-old private limited company registered in Birmingham, company number 13880608, one of 1,296 motor trade companies in Birmingham. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £284K (+522.7%) on the year before, to £338K.
- Current assets of £17K against £59K owed within a year: 0.3 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £338K | £17K | £59K | 0 | |
| 31 Jan 2024 | £54K | £3,473 | £37K | 0 | |
| 31 Jan 2023 | £8,372 | £14K | £4,854 | 0 |
Where Mainstream Autos Limited is registered
The registered office is in Birmingham (B12), in the Birmingham local authority area, West Midlands. Show B12 9BU on a map.
Other trade companies in B12
- Proton Tech Electrical LtdElectricians
- Leopold Auto LimitedMechanics and garages
- Apex Cleaners LtdCleaning companies
- Altitude Build Group LimitedGlaziers
- Glazed Direct LtdGlaziers
- Calderstead Facilities Management LtdFacilities management
- Repair Garage LimitedMechanics and garages
- Commercial Cleaning Services LtdCleaning companies
What happens if Mainstream Autos 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 13880608
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 January 2022 (4 years ago)
- Registered office
- C/O Mainstream Accountancy Services, 527 Moseley Road, Birmingham, B12 9BU
- Nature of business
- Sale of used cars and light motor vehicles (SIC 45112)
Renting and leasing of cars and light motor vehicles (SIC 77110) - Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 26 February 2026
Filing notes for motor trade companies
Motor trade companies hold vehicle stock, and how that stock is valued at the year end moves the profit directly. Some use the VAT margin scheme.
Similar companies in Birmingham
Other active motor trade companies registered in Birmingham.
- Mainstream Parts Limited2023
- Majestik Motors Limited2024
- Mak Customz UK Ltd2025
- Mak Spares Limited2021
- Margab Ltd2016
- Marjan Tyres Ltd2025
- Maroof Autos Ltd2026
- Maroufi Motors Limited2026
All motor trade companies in Birmingham · All trades in Birmingham · Motor traders across the UK
Frequently asked questions
When are Mainstream Autos Limited's accounts due?
Mainstream Autos Limited's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is Mainstream Autos Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Mainstream Autos Limited still trading?
Mainstream Autos 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 Mainstream Autos Limited do?
Mainstream Autos Limited is registered under Sale of used cars and light motor vehicles (SIC 45112); Renting and leasing of cars and light motor vehicles (SIC 77110).
How old is Mainstream Autos Limited?
Mainstream Autos Limited was incorporated on 30 January 2022, 4 years ago.
What is the penalty if Mainstream Autos 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 Mainstream Autos 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.