Senior Corporate Tax Manager

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:Accounting qualificationCorporation tax trainedPractical experience of completing and filing corporate tax returnsExperience of RDEC claimsExcellent organization and communication skillsExperience in the construction sector is preferableGood people skills with ability to engage on technical matters with non-technical staffMust be willing to be hands on and capable of driving the delivery of project activityExcellent organizer & communicatorMay be required to travel to Costain sites across the UKPrioritising CT actions & delivery, to realistic but challenging timeframesSupporting transformation activity and the executive board agenda Preparation of all Corporate Tax returnsCorporate tax cash management, Group relief and RDEC reliefAccounting for corporate tax in Group and subsidiary accounts (both half and full year for
Group)Manage RDEC processProduction of accurate quarterly forecasts of tax rates and tax payments on accountManaging adhoc queriesProcess mapping CT returns in support of SAOResponding to HMRC queries and attending HMRC meetings Identifying opportunities to enhance processes & compliance by intelligent data capture and reportingInputting into finance and tax transformation activity including opportunities to improve through digitalization.Supporting Initiatives such as entity rationalisationFull timePosting Date: 2026-09-16

Supporting the 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.#LI-ES1Costain 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