Costain Group PLC company overview
Costain Group PLC is a public limited company registered with company number 01393773. It was incorporated on 12 Oct 1978 and its current status is active.
The registered office is at Seventh Floor, 70 St Mary Axe, London, EC3A 8BE. The company has 8 active officers. It was previously called Trushelfco (No. 192) Limited.
Costain Group PLC upcoming deadlines
Year end accounts
Due 30 Jun 2027
Confirmation statement
Due 6 Mar 2027
Corporation tax payment
Due 1 Oct 2027
Dates are the ones Companies House holds for this company. Late accounts trigger automatic Companies House penalties starting at £150, and HMRC charges interest on late corporation tax.
Costain Group PLC at a glance
48 years
Trading age
17,564 days since incorporation
8
Active officers
Alexander, Helen, Anthony, Fiona
849
Filings on record
Latest: 4 Nov 2026
100/100
Filing health score
Accounts and statement up to date
Directors of Costain Group PLC
Former officers
58 more officers are on the register. See all on Companies House
Nature of business (SIC codes)
42110
Construction of roads and motorways
70100
Activities of head offices
71129
Other engineering activities
Allowable expenses for Costain Group PLC
Based on Costain Group PLC's SIC codes (42110, 70100, 71129), these are typical tax-deductible expenses for a professional & creative services company. Claiming them lowers the profit you pay corporation tax on.
Design tools & equipment
Creative software, cameras, drawing tablets and props.
Professional memberships
HMRC-approved professional body subscriptions.
Business travel
Trains, flights, hotels and subsistence for client work.
Working from home
A share of household bills or the £6-a-week flat rate.
Vehicle & mileage
45p a mile for the first 10,000 business miles in a personal car.
Staff & director salaries
Wages, employer NI and pension contributions paid through PAYE.
Accountancy & legal fees
Bookkeeping, year-end accounts, tax advice and company secretarial costs.
Business insurance
Public liability, professional indemnity and employer's liability cover.
Phone & internet
Business mobile contracts, broadband and a share of home internet.
General guidance only — every expense must be wholly and exclusively for business. Ask an accountant
Tax guide for businesses like Costain Group PLC
How much tax does a professional & creative services company pay?
UK companies pay corporation tax at 19% on profits up to £50,000, rising to 25% above £250,000, with marginal relief in between. Claiming every allowable expense reduces taxable profit.
Does a company like Costain Group PLC need to register for VAT?
VAT registration is compulsory once taxable turnover passes £90,000 in any rolling 12 months. Many businesses register voluntarily to reclaim VAT on costs.
How much does an accountant cost for a limited company in London?
Fixed-fee accountants typically charge £60–£200 a month for a small limited company, covering year-end accounts, corporation tax and the confirmation statement.
Can directors of Costain Group PLC pay themselves in dividends?
Most small company directors take a low salary plus dividends. Dividends are paid from profits after corporation tax, with an annual £500 dividend allowance.
Filing history
4 Nov 2026 · SH06
Cancellation of shares on 30 Sep 2026
4 Nov 2026 · SH03
Return of purchase of own shares
29 Oct 2026 · SH06
Cancellation of shares on 23 Sep 2026
29 Oct 2026 · SH03
Return of purchase of own shares
27 Oct 2026 · SH01
Allotment of shares on 23 Oct 2026
15 Oct 2026 · SH06
Cancellation of shares on 15 Sep 2026
15 Oct 2026 · SH03
Return of purchase of own shares
9 Oct 2026 · SH06
Cancellation of shares on 8 Sep 2026
9 Oct 2026 · SH03
Return of purchase of own shares
2 Oct 2026 · SH06
Cancellation of shares on 2 Sep 2026
2 Oct 2026 · SH03
Return of purchase of own shares
23 Sep 2026 · SH03
Return of purchase of own shares
21 Sep 2026 · SH06
Cancellation of shares on 25 Aug 2026
21 Sep 2026 · SH06
Cancellation of shares on 18 Aug 2026
21 Sep 2026 · SH06
Cancellation of shares on 11 Aug 2026
21 Sep 2026 · SH03
Return of purchase of own shares
21 Sep 2026 · SH03
Return of purchase of own shares
17 Sep 2026 · SH06
Cancellation of shares on 4 Aug 2026
17 Sep 2026 · SH03
Return of purchase of own shares
7 Sep 2026 · SH03
Return of purchase of own shares
Showing the latest 20 of 849 filings. See the full history on Companies House
Accounting services for Costain Group PLC
From tax to payroll, find accountants who look after every part of Costain Group PLC’s finances.
Year-end accounts
Statutory accounts prepared and filed with Companies House on time, every year.
Corporation tax
CT600 returns filed with HMRC and tax planned so you only pay what you owe.
Payroll
Pay your team on time every month, with RTI submissions and pensions handled.
VAT & bookkeeping
Keep your books tidy and your VAT returns MTD-ready all year round.
Confirmation statement
Your annual confirmation statement checked and filed before the deadline.
Management accounts
Monthly or quarterly reports so you can see how the business is really doing.
More about Costain Group PLC
About Costain Group PLC
Costain Group PLC is a UK public limited company based in London, registered at Companies House as company number 01393773 since 12 Oct 1978. Its listed activities include construction of roads and motorways, activities of head offices, other engineering activities. This page brings together its public record — directors, registered office, nature of business and filing history — in one easy place.
Costain Group PLC filings and compliance
Every UK limited company must file annual accounts, a confirmation statement and a corporation tax return each year. Costain Group PLC has 849 filings on record. Keeping on top of these deadlines avoids automatic penalties from Companies House and HMRC, which start at £150 for late accounts.
Looking for an accountant in London?
Businesses like Costain Group PLC often use a local accountant for year-end accounts, corporation tax, VAT and payroll. Compare fixed-fee, regulated accountants near London and get free quotes in minutes.
This page shows public information from Companies House. Director of Costain Group PLC?
Costain Group PLC – frequently asked questions
What is the company number of Costain Group PLC?
Costain Group PLC is registered at Companies House under company number 01393773.
When was Costain Group PLC incorporated?
Costain Group PLC was incorporated on 12 Oct 1978 as a public limited company.
Who are the directors of Costain Group PLC?
Current officers are Alexander John Vaughan (director), Helen Margaret Willis (director), Anthony James Quinlan (director), Fiona Margaret Barkham (director), Nicole Ann Geoghegan (secretary), Kate Harriet Alexandra, Baroness Rock (director) and 2 more.
What does Costain Group PLC do?
The company's registered nature of business (SIC) is 42110 – Construction of roads and motorways; 70100 – Activities of head offices; 71129 – Other engineering activities.
Where is Costain Group PLC registered?
The registered office address is Seventh Floor, 70 St Mary Axe, London, EC3A 8BE.
Is Costain Group PLC still trading?
According to its latest Companies House record the company status is active. Its most recent filing was cancellation of shares on 30 Sep 2026 on 4 Nov 2026.