Tax Manager - Finance

A Bit About Us

At Gamma, we’re more than just a leader in Unified Communications as a Service (UCaaS) – we’re a dynamic, forward‑thinking team revolutionizing the way businesses connect and communicate. We provide voice, data, and mobile solutions to businesses across the UK, Germany, Spain, and the Benelux region, and are expanding rapidly to bring digital automation and Gamma‑powered services to Enterprise, Public Sector and SMEs.

Our team thrives on collaboration, innovation, and diversity, and we celebrate inclusivity and fresh ideas.

We are seeking a highly capable and commercially minded Tax Manager to join a FTSE 250 Tax Group, reporting to the Group Head of Tax. This role will take ownership of UK corporate tax compliance, review VAT returns, manage group tax reporting, support the wider tax strategy, and partner with finance and operational teams. It will also assist with the implementation of country‑by‑country, transfer pricing documentation, and Pillar 2 returns.

• Own UK corporate tax compliance, ensuring accurate and timely filings with advisor oversight
• Manage quarterly tax payments and support forecasting for budgeting cycles
• Support tax reporting (half‑year and year‑end) under IFRS, maintaining robust controls and documentation
• Review VAT returns and provide clear guidance to the business
• Advise stakeholders on a broad range of UK tax matters, including projects and restructures
• Lead the R&D tax credit process, partnering with advisors and internal teams
• Manage and optimise the Group’s Patent Box position
• Support tax governance in line with SAO and CCO requirements
• Identify and mitigate tax risks across the UK business
• Build strong HMRC relationships and support a low‑risk rating outcome
• Drive continuous improvement in tax processes and controls
• Support implementation of Country‑by‑Country Reporting and Pillar 2

• CTA/ATT/ACCA/ACA qualification
• Strong UK corporate tax compliance and reporting experience
• Experience with R&D Tax Credits and Patent Box preferred
• Good working knowledge of UK VAT preferred
• Experience managing external advisors and working in a large or complex organisation
• Previous experience as a Tax Accountant in a UK business with an international presence
• Experience with D365 or One Stream preferred

• 25 days of annual leave plus an extra day off for your birthday, and a volunteer day to support a charity that matters to you
• Enhanced maternity and paternity pay and childcare vouchers
• Pension plan with 4.59% Gamma contribution plus your own contributions
• Group income protection and life assurance (four times your salary)
• Tax‑efficient share save and share incentive plans
• Private medical insurance through Vitality, extending to your immediate family
• Electric Vehicle scheme through Octopus and a Cycle to Work scheme

• No visa sponsorship or relocation support for this role
• Hybrid from our Newbury office three times a week
• If you feel you could be a good fit for Gamma but do not meet all the requirements, we still encourage you to apply – you could be the person we are looking for

Gamma is an equal‑opportunity employer. We care about inclusion and believe in having diverse teams where everyone can be their true authentic selves. We value each person and encourage under‑represented backgrounds to apply. We do not discriminate based on any protected characteristics including race, colour, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, marital status, disability, or age.

We are a family‑friendly employer with a culture based on trust, autonomy and flexibility to help you create a work‑life balance and enjoy working here at Gamma.