R&D Tax - Assistant Manager

MAZARS UK; City Of London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A global professional services firm is seeking an R&D Tax - Assistant Manager to lead R&D tax relief claims and build client relationships. This role requires a minimum of 3 years of experience, strong technical knowledge in UK R&D legislation, and a relevant qualification. Offered hybrid working options, competitive salary, and a comprehensive benefits package.

Benefits

Competitive salary

Annual performance-based bonus

Hybrid working options

Comprehensive benefits package

Qualifications

• Minimum of 3 years relevant experience in a professional services environment.
• Strong level of technical knowledge in UK R&D legislation.
• Qualified or part-qualified in relevant tax or advisory experience.

Responsibilities

• Lead delivery of R&D tax relief and Patent Box claims.
• Prepare technical documentation to support R&D claims.
• Manage project timelines, budgets, risks, and resources.
• Serve as client contact on engagements and maintain relationships.

Skills

R&D tax relief preparation

Client relationship management

Technical tax knowledge

Project management

Education

ATT, ACA, ACCA, CTA or equivalent

Background in science, technology, engineering, or software

Job description

Overview

R&D Tax - Assistant Manager (5383)
At Forvis Mazars, we\'re always looking ahead, for our people, our clients and the wider world. Together, we grow, belong and impact. You\'ll be supported to learn, explore and develop from day one. We celebrate individuality, encourage bold thinking and believe success comes from working together. With us, you\'ll belong to your local team, gain global experience, and make a meaningful impact now and in the future.

What You\'ll Do

• Lead or co-lead delivery of R&D tax relief and Patent Box (depending on the level of experience) claims for Forvis Mazars clients, including develop claim methodologies, and preparing R&D tax relief claims for submission to the HMRC.
• Write detailed technical descriptions of client projects and prepare documentation to support R&D claims, based on UK DSIT guidelines. Analyze and interpret tax legislation and R&D incentives guidance as they apply to clients\' activities—identifying eligible activities/costs, quantifying claims, documenting methodologies, and liaising with clients\' technical and finance teams.
• Manage project timeline, budget, risk, and resource allocation for less complex assignments; ensure deliverables meet internal quality standards.
• Serve as day-to-day client contact for your portfolio of engagements, building and maintaining client relationships and responding to queries as they arise.

What You\'ll Bring

• A minimum of 3 years of relevant experience (or equivalent) in a professional services environment, particularly in relation to preparing UK R&D tax relief (and/or Patent Box) claims.
• A strong level of technical knowledge in relation to the UK R&D legislation.
• Qualified or part-qualified (e.g., ATT, ACA, ACCA, CTA or equivalent) or strong technical background in science, technology, engineering, or software, with relevant tax or advisory experience.

What We Offer

Forvis Mazars is a leading global professional services network delivering quality across audit, tax, advisory and consulting. We\'re united by a shared purpose and a strong sense of belonging, with a culture rooted in inclusion, responsibility, and collaboration. With us, you\'ll be empowered to shape your career, contribute your ideas, and make a difference from day one. We embrace individuality and encourage everyone to bring their whole selves to work. Whether you\'re looking to stretch your potential, build meaningful relationships or be part of a diverse, forward-thinking team, this is a place where you can thrive.

Salaries & Benefits

At Forvis Mazars, we pride ourselves on being a fair and competitive employer. We offer a competitive salary based on experience and benchmarking, an annual performance-based bonus, and regular salary reviews. You\'ll enjoy hybrid working options to support work-life balance, with clear career progression opportunities. Our comprehensive benefits package includes wellbeing support to take care of our people.

Location

• Various – This role can be based in our Birmingham Office, Leeds Office, Leicester Office, London Office, Manchester Office, Milton Keynes Office, Nottingham Office or from our Poole Office.

Documents

• FM - 5383 - R&D Tax - Assistant Manager JD.pdf (131.10 KB)

Ready to Grow, Belong, and Impact? Apply now and join us at Forvis Mazars!