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Senior Corporate Tax Manager

Costain Group Open
Hybrid London Senior Tax

At a glance

Senior Tax role at Costain Group. London.

Pay not stated Tax salary

RoleTax
SenioritySenior
LocationLondon
WorkplaceHybrid
PostedOct 22, 2026
Role brief

financeroles summary, based on the employer's posting.

What you'll do

  • Deliver corporate tax accounting and compliance work for the year end and half year, supporting the Group Tax Manager
  • Prepare and file corporate tax returns, manage RDEC claims, and oversee group relief and corporate tax cash
  • Record tax in group and subsidiary accounts, and prepare quarterly tax-rate and payment forecasts
  • Map tax-return processes for SAO, answer HMRC questions, and attend meetings with HMRC
  • Improve tax controls through better data capture and reporting, while contributing to finance and tax transformation

What you bring

  • You hold an accounting qualification and have training in corporation tax
  • You have practical experience completing and filing corporate tax returns
  • You have worked on RDEC claims

Who this fits

This role suits a hands-on tax professional who can deliver project work and explain technical issues to colleagues without tax expertise. Construction-sector experience is preferred. You may need to travel to Costain sites around the UK.

From the employer

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.

  • 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

  • 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

Opportunity

Tax work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Tax

Find me work

By the team behind financeroles.

Find me work
Opportunity

Tax work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Find me work

By the team behind financeroles.