Corporate Tax Manager / Senior Tax Leadership Opportunity

Join Affinia — A Top 35 UK Accounting Firm

Affinia is a leading UK Top 35 accounting firm, delivering expert support across accounting, audit, tax, compliance, strategic advisory, payroll, cloud accounting, mergers & acquisitions, and financial planning.

With a heritage spanning more than 300 years of combined experience, we bring together over 500 professionals across 15 offices

At Affinia, we combine technical excellence with commercial thinking. We invest in innovation, develop deep sector expertise, and build long-term relationships that help our clients achieve their short-, medium-, and long-term goals.

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Why Affinia?

We are more than an accountancy firm — we are a collaborative, forward-looking business committed to excellence, growth, and meaningful client relationships.

What sets us apart

• Top 35 UK accounting firm

• 500+ professionals across 15 offices

• Expertise across seven principal practice groups

• Strong reputation for technical quality and commercial advice

• Ongoing investment in technology, training, and people development

• A culture built on authentic connection, collaboration, and growth

Our key service areas

• Accountancy & Advisory

• Tax and Planning

• Audit Services

• Corporate Finance

• Digital Solutions

• Payroll

• Financial Planning

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The Opportunity

This is an exciting opportunity to join Affinia’s growing and ambitious tax department in a senior role with real influence.

You will play a key part in leading corporate tax compliance delivery while also contributing to higher-value advisory work, strategic planning, client development, and team leadership.

We are looking for an experienced corporate tax professional who is confident managing complex compliance workflows, building trusted client relationships, identifying planning opportunities, and supporting the wider strategic success of the Tax Service Line.

This role offers the chance to work with a varied portfolio of businesses, from owner-managed companies to larger corporate groups, while helping shape the future direction of the team.

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Purpose of the Role

As part of Affinia’s dynamic tax team, you will be responsible for delivering outstanding corporate tax services while helping drive operational excellence, profitable growth, and strong client outcomes.

This role combines:

• Leadership

• Strategic financial oversight

• Client relationship management

• Tax compliance expertise

• Advisory project involvement

• Business development

You will also support senior Tax Service Line leaders in delivering a successful and commercially strong service offering across the wider business.

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Key Responsibilities

Portfolio & Compliance Management

• Manage a substantial portfolio of corporate clients, from owner-managed businesses to large groups

• Oversee the full corporate tax compliance cycle across the team

• Lead annual filing processes and ensure submissions are accurate, timely, and compliant

• Review complex compliance work to a consistently high standard

• Advise clients directly on their tax positions and compliance obligations

• Ensure submissions to HMRC are completed efficiently and accurately

Advisory & Tax Planning

• Identify tax planning opportunities through compliance and advisory interactions

• Progress tax planning opportunities independently with clients

• Support the delivery of ad hoc advisory assignments

• Assist with project scoping, fee proposals, and the preparation of bespoke tax planning reports

• Contribute to high-value client work across a diverse range of tax matters

Leadership & Team Development

• Line manage and mentor junior members of the tax team

• Provide clear, constructive feedback to support development

• Assist with internal technical tax training

• Lead by example, promoting integrity, accountability, and quality in all areas of work

• Support the wider tax leadership team in delivering strategic objectives

Collaboration & Process Improvement

• Work collaboratively with colleagues across all office locations

• Help improve compliance workflows and internal processes

• Support the firm’s continued use of modern tax technology for efficient, high-quality service delivery

• Promote the Tax Service Line across the wider group

• Assist colleagues in other offices with tax matters as needed

• Work closely with other service lines to provide a joined-up, client-focused approach

Client Relationships & Business Development

• Build and maintain strong relationships with clients and professional contacts

• Lead meetings with complex clients and act as a trusted advisor

• Spot opportunities for growth within existing client relationships

• Support pitches and onboarding for new business opportunities

• Work with senior colleagues to maximise fee revenue and add measurable value

• Help drive profitable growth across the tax portfolio

Financial & Commercial Management

• Monitor and manage key KPIs across your portfolio and team, including:

• WIP

• Billing

• Debtors

• Help ensure the Tax Service Line operates efficiently and profitably

• Bring a commercial mindset to decision-making and client service delivery

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What We’re Looking For

We are seeking a technically strong and commercially aware tax professional with the confidence to lead, advise, and develop others.

Professional Skills & Experience

• CTA qualification preferred

• Strong corporate tax technical knowledge

• Solid advisory experience

• Proven ability to manage a varied tax portfolio

• Strong experience of corporate tax compliance processes and workflow

• Demonstrated ability to identify and develop tax planning opportunities

• Ability to work autonomously while also leading and supporting others

• Excellent organisational and prioritisation skills

• Confidence reviewing others’ work and improving quality through feedback

• Strong relationship-building skills with clients, colleagues, and external stakeholders

• A genuine desire to continue developing your skills and expertise

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Working at Affinia

We operate a flexible and hybrid working model, giving our people the opportunity to split their time between the office, home, and client sites where required.

We understand that people perform at their best when supported both professionally and personally, which is why we invest in learning, wellbeing, and flexible ways of working.

Learning & Development

You will have access to industry-leading training resources to support both technical and soft skills development, including:

• Croner-i

• Tolley’s

• Mercia

• LinkedIn Learning

We also work with apprenticeship providers to offer a combination of paid work and professional qualifications where appropriate.

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Benefits

Alongside a supportive and inclusive culture, Affinia offers a comprehensive benefits package designed to support your wellbeing, professional development, and work-life balance.

Core benefits include

• 25 days’ holiday (FTE) plus Bank Holidays (Sept–Aug)

• Option to purchase up to 3 additional days’ annual leave per year

• Auto-enrolment Pension Scheme with True Potential

• Death in Service cover

• Full study support, including tuition fees and paid study days

• Professional membership support

• Paycare cash-back scheme for:

• Dental

• Optical

• Professional therapies

• Agile/Hybrid Working Policy

• Dress for your Diary Policy

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Our Culture

At Affinia, our culture is shaped by ambition, integrity, and a commitment to making a positive impact in the communities we serve.

We are passionate about helping our people succeed, develop, and thrive. As our business continues to grow, we are committed to creating opportunities for our colleagues to grow with us.

We believe in building an environment where people feel valued, supported, and empowered to contribute their best.

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Flexibility & Inclusion

Affinia is a flexible business that has embraced hybrid working, enabling colleagues to enjoy a balance of home and office-based working.

We welcome applications from candidates seeking flexible or agile working arrangements and are happy to discuss preferred working patterns during the application process.

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Equal Opportunities

Affinia is proud to be an Equal Opportunity Employer.

We do not tolerate discrimination on the basis of age, disability, sex, race, religion or belief, gender reassignment, marriage or civil partnership, pregnancy or maternity, or sexual orientation.

We are committed to creating an inclusive workplace that promotes equality of opportunity for all. We welcome applications from a diverse range of candidates and make hiring decisions based solely on merit, skills, potential, and experience.

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Please Note

This job profile is intended as an overview of the role and is not an exhaustive list of duties. From time to time, you may be asked by your line manager to take on additional responsibilities in line with business needs.

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Ready to Take the Next Step?

If you are an experienced corporate tax professional looking for a role that offers leadership responsibility, advisory variety, client exposure, and the opportunity to influence a growing Tax Service Line, Affinia would love to hear from you.