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Senior Tax Manager

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Onsite

Senior Tax Manager

Costain Group PLC

Senior Tax Manager

Skills

Compliance

1 month ago

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Important information


Contract type:

Permanent

Location:

Maidenhead SL6, UK

Work mode:

Onsite

Published on:

16 September 2026

What they need


Supporting t he Group Tax Manager, you will deliver the Corporate tax year end and half year accounting and compliance obligations of and advisory support for the Costain Group. The role will involve dealing with all aspects of Corporate Taxes within the UK based Costain Group. The role will also be pivotal in helping ensure that tax compliance is embedded across our systems and processes.

Responsibilities

  • Prioritising CT actions & delivery, to realistic but challenging timeframes
  • Supporting transformation activity and the executive board agenda
  • Preparation of all Corporate Tax returns
  • Corporate tax cash management, Group relief and RDEC relief
  • Accounting for corporate tax in Group and subsidiary accounts (both half and full year for Group)
  • Manage RDEC process
  • Production of accurate quarterly forecasts of tax rates and tax payments on account
  • Managing adhoc queries
  • Process mapping CT returns in support of SAO
  • Responding to HMRC queries and attending HMRC meetings
  • Identifying opportunities to enhance processes & compliance by intelligent data capture and reporting
  • Inputting into finance and tax transformation activity including opportunities to improve through digitalization.
  • Supporting Initiatives such as entity rationalisation

Qualifications

  • Accounting qualification
  • Corporation tax trained
  • Practical experience of completing and filing corporate tax returns
  • Experience of RDEC claims
  • Excellent organization and communication skills
  • Experience in the construction sector is preferable
  • Good people skills with ability to engage on technical matters with non-technical staff
  • Must be willing to be hands on and capable of driving the delivery of project activity
  • Excellent organizer & communicator
  • May be required to travel to Costain sites across the UK

About Us Costain helps to improve people’s lives with integrated, leading edge, smart infrastructure solutions across the UK’s energy, water, transportation and defence markets. We help our clients improve their business performance by increasing capacity, improving customer service, safeguarding security, enhancing resilience, decarbonising and delivering increased efficiency. Our vision is to be the UK’s leading smart infrastructure solutions company. We will achieve this by focusing on blue chip clients whose major spending plans are underpinned by strategic national needs, regulatory commitments, legislation or essential performance requirements. We offer our clients leading edge solutions that are digitally optimised through the following five services which cover the whole lifecycle of their assets: future-shaping strategic consultancy; consultancy and advisory; digital technology solutions; asset optimisation and complex programme delivery. Our culture and values underpin everything we do.

Costain appreciate the time and effort taken when applying for one of our positions but, due to the high volume of responses, we are unable to provide individual feedback on candidates at application phase.

We do share individual feedback following an interview .

A Disability Confident employer will generally offer an interview to any applicant that disclose they have a disability and meets the minimum criteria for the job as defined by the employer.

It is important to note that in certain recruitment situations such as high-volume, seasonal and high-peak times, the employer may wish to limit the overall numbers of interviews offered to both disabled people and non-disabled people.

For more details please go to the Disability Confident website:

https://www.gov.uk/government/collections/disability-confident-campaign

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