R&D Assistant Tax Manager - Big 4

Taxation; Greater London; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading national Tax R&D team in London is seeking an R&D Assistant Tax Manager. This role offers the chance to manage relationships with clients while preparing HMRC-compliant reports and documentation. The ideal candidate should have experience with UK R&D tax claims and be able to manage multiple priorities in a fast-paced environment. Strong analytical skills and proficiency with Excel are essential. The position provides opportunities for career development within a Big 4 global network.

Qualifications

• Hands-on experience preparing and reviewing UK R&D tax claims.
• Confidence in managing multiple priorities in a fast-paced environment.
• Analytical skills necessary for accurate claim calculations.

Responsibilities

• Manage client relationships and day-to-day queries.
• Prepare HMRC-compliant R&D reports and documentation.
• Contribute to business development and cross-network opportunities.

Skills

Experience preparing and reviewing UK R&D tax claims

Strong organisational skills

Excellent communication skills

Proficiency with Excel

Job description

R&D Assistant Tax Manager London | Big 4 | Global Network

We are seeking a AM level (possible a Tax Senior with some R&D exp) to join a leading national Tax R&D team in London within a Big 4 firm. This is an exciting opportunity to work across a diverse client portfolio, from innovative SMEs to large corporates covering a wide spectrum of clients, delivering high-quality R&D tax advice and claims support while collaborating with colleagues across a global network.

In this role, you will take ownership of key aspects of client relationships, managing deadlines, meetings, and day-to-day queries, while preparing HMRC-compliant R&D reports and technical documentation. You will review claim calculations, ensure accurate application of UK tax legislation, and contribute to business development and cross-network opportunities. This role offers real exposure to complex R&D claims and the chance to strengthen both technical expertise and client-facing skills.

The ideal candidate will have hands‑on experience preparing and reviewing UK R&D tax claims, including SME and RDEC, and be confident managing multiple priorities in a fast-paced environment. Strong organisational and stakeholder management skills are essential, alongside excellent communication, a collaborative mindset, and the ability to work effectively with colleagues and clients alike. Analytical skills and proficiency with Excel are highly desirable.

This is a role for someone looking to develop their career in R&D tax, gain exposure to a global network, and make a tangible impact on clients' innovation strategies. NB - you must have up to date UK R&D tax (costing) experience Call Kevin on 07968 202512 or email [e-mail]

As an employer, we are committed to ensuring the representation of people from all backgrounds regardless of their gender identity or expression, sexual orientation, race, religion, ethnicity, age, neurodiversity, disability status, or any other aspect which makes them unique. We welcome applicants from all backgrounds to apply and would encourage you to let us know if there are steps, we can take to ensure that your recruitment process enables you to present yourself in a way that makes you comfortable.