Corporate Tax Assistant Manager

Sumer Group Holdings Limited; Greater London; Hybrid; GBP 60,000 - GBP 80,000; Full time

Job summary

A leading UK chartered accountancy practice is seeking a Corporate Tax Assistant Manager in London. The role involves managing a portfolio of corporate tax clients, delivering high-quality compliance work, and supporting tax advisory projects. Ideal candidates will be ACA or CTA qualified, with strong communication skills and a proactive attitude towards corporate tax. This position also offers mentorship opportunities for junior team members, along with a supportive working environment that values fairness and diversity.

Benefits

Group Life Cover

25 days holiday

Hybrid working policy

Permanent Health Insurance

Contributory Private Health Scheme

Discounted Gym Membership

Pension Scheme

Qualifications

• Motivated tax professional with a genuine interest in corporate tax.
• Strong written and verbal communication skills.
• Excellent organizational and time management ability.
• Proactive and self-motivated approach.

Responsibilities

• Handle a portfolio of corporate tax clients.
• Deliver high-quality compliance work.
• Manage HMRC enquiries and review tax computations.
• Support tax advisory work as it arises.

Skills

Corporate tax knowledge

Strong communication skills

Organizational skills

Proactive approach

IT skills

Education

ACA or CTA qualified

Tools

Microsoft Word

Excel

Outlook

Alphatax

Job description

Corporate Tax Assistant Manager

Department: Corporate Tax

Employment Type: Permanent

Location: London

Description

We Shine Together – Who We Are

HW Fisher is a leading UK chartered accountancy practice and a proud member of the Sumer Group, the UK’s fastest-growing network supporting SMEs. Sumer brings together over 2,500 specialists across the UK, united by a shared ambition: to be the most trusted provider of professional services to SMEs, while preserving the personalised, partner-led approach that defines high-quality advisory firms.

Our Corporate Tax team plays a pivotal role across the practice, working closely with colleagues in audit, accounts and advisory to deliver practical, commercially focused tax solutions.

The team advises a broad and varied client base, with a strong focus on owner-managed businesses, alongside larger corporates and complex transactions. From day-to-day corporation tax compliance to EIS, share schemes and transaction support, the work is technically interesting, wide-ranging and rarely routine.

We Make It Count – How We Work

Our teams are collaborative, technically strong and commercially minded. We believe great tax advice goes beyond compliance — it’s about understanding the wider business context and delivering practical, value-driven solutions.

We invest in our people through hands‑on experience, close Partner access and continuous professional development. Progression is based on merit, capability and curiosity, with clear opportunities to build both technical depth and advisory exposure as your career develops. Whether you’re newly qualified or already building post‑qualification experience, you’ll be supported to grow with us.

The Role – Making an Impact

We are seeking a qualified Corporate Tax professional to join our growing team. This is a hands‑on role offering responsibility for your own client portfolio, exposure to interesting advisory work and the opportunity to play an active role in developing junior team members.

Key Responsibilities

• Taking responsibility for a portfolio of corporate tax clients and proactively delivering high‑quality compliance work
• Reviewing corporation tax computations and returns and managing HMRC enquiries
• Reviewing deferred tax calculations, tax reconciliations and tax disclosures for inclusion in statutory accounts
• Maintaining quarterly payments schedules and issuing client reminders
• Responding to client and internal queries relating to tax computations and legislationSupporting tax advisory work as it arises, including:
• Preparation of EMI option documentation
• EIS advance assurance applications
• Assisting with tax due diligence projects
• Supporting the training, development and day‑to‑day supervision of junior team members

Skills, Knowledge & Expertise

You’ll be a motivated and detail‑oriented tax professional with a genuine interest in corporate tax and a desire to continue developing your expertise.

• Ideally ACA or CTA qualified, with experience in corporate tax
• Strong written and verbal communication skills
• Excellent organisational and time management ability
• A proactive, self‑motivated approach and enthusiasm for tax
• Strong IT skills, particularly in Microsoft Word, Excel and Outlook
• The ability to read, interpret and apply relevant tax legislation
• Comfortable working both independently and as part of a collaborative team
• Experience using Alphatax would be advantageous.

Job Benefits

• Group Life Cover
• 25 days holiday on commencement
• Buying and Selling Holiday Scheme
• Hybrid working policy – at least 2 days in the office a week, with a core hours system in place
• PHI (Permanent Health Insurance)
• Contributory Private Health Scheme
• Non‑Contributory Health Cash Plan
• Season Ticket Loan (after qualifying period)
• Discounted Gym Membership
• Discounted Tastecard
• Perkbox Membership
• Pension Scheme
• Cycle voucher scheme

Belong @ Sumer

At Sumer, we know everyone’s journey is different. That’s why we’re committed to fairness, removing barriers, and giving people the support they need to do their best work. If you need any support during the hiring process, just let us know.

Our values represent what matters most to us and guide how we work every day:

• We Shine Together
• We Do the Right Thing
• We Make It Count

We know diverse teams make us stronger. That’s why we’re creating an inclusive workplace where everyone belongs and differences are valued and celebrated.