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Tax Assistant Manager -IoM

About Grant Thornton Isle of Man

Grant Thornton Isle of Man is part of the global Grant Thornton network, one of the world’s leading organisations of independent assurance, tax, and advisory firms. We provide tailored audit, advisory, and tax services to dynamic organisations in the Isle of Man and internationally.

Our firm has deep roots in the local market and a strong reputation for delivering high-quality, partner-led service. We are proud to serve a wide range of clients across key sectors including financial services, insurance, funds, fintech, and more. With a collaborative, agile approach and a growing team of forward-thinking professionals, Grant Thornton Isle of Man is committed to helping our clients unlock their potential for growth

We are looking to expand our team with a Tax Assistant Manager. This is a key role within our Tax practice, offering the opportunity to work closely with senior leadership, contribute to strategic client relationships, and help shape the future of our Tax Offering on the Isle of Man.

Main responsibilities:

+ Lead and manage a diverse tax compliance portfolio, including Isle of Man corporate tax returns, personal tax returns, payroll, and VAT, ensuring accuracy and efficiency.

+ Review and enhance compliance processes, while mentoring and guiding junior team members to help them grow and succeed.

+ Be a technical expert, providing clear guidance and serving as a trusted resource for IOM and UK tax issues for junior colleagues and clients.

+ Collaborate effectively across the team, building strong relationships and earning trust from colleagues at all levels.

+ Support senior leadership on consultancy projects, with a focus on Economic Substance, restructuring strategies, and personal tax planning for individuals relocating to the Isle of Man or managing inheritance tax.

+ Produce high-quality documentation and deliverables for senior colleagues, ensuring accuracy, clarity, and compliance with professional standards.

+ Develop strong client relationships, gaining a deep understanding of their businesses and delivering tailored solutions that exceed expectations.

+ Manage billing and work-in-progress efficiently, ensuring timely invoicing and meeting recoverability targets.

+ Deliver creative, proactive solutions to complex tax challenges, adding real value to clients and the firm.

+ Maintain rigorous adherence to risk management processes, safeguarding compliance and quality standards.

+ Show commitment to personal development, actively engaging in appraisals and learning from feedback to continually improve.

+ Contribute to business growth, by understanding the firm’s full range of services and participating development initiatives.

Skills and attributes:

+ ATT/ACA/ACCA or CTA qualified;

+ minimum 3/4 years’ post qualification experience of working in a tax department of a larger firm;

+ strong technical knowledge of both IOM and UK tax and proven ability to identify opportunities for clients;

+ self-motivated and capable of working independently while collaborating effectively within a team;

+ skilled in building trusted client relationships and managing compliance processes

+ demonstrate leadership and people development skills to support junior staff growth;

+ managerial skills with the ability to manage compliance process and compliance staff;

+ excellent interpersonal and communication skills, with a focus on client service;

+ collaborative team player who thrives in supporting colleagues and achieving shared goals;

+ Adaptable and resilient, able to manage multiple priorities in a fast-paced environment and embrace change with a positive, solutions-focused approach; and

+ ambitious and committed to building a long-term career in practice.

About Us

We are Grant Thornton

Grant Thornton Ireland is rapidly approaching 3,000 people, in 9 offices across Ireland, Isle of Man, Gibraltar and Bermuda. With a presence in over 149 countries around the world and a global network of 73,000 people, we bring our clients the local knowledge, national expertise and global presence to help them succeed – wherever they’re located.

At GT, we work as trusted advisors, bringing local knowledge and national expertise, with a global presence, to help businesses succeed – wherever they are located. We make business more personal by investing in building relationships and empowering our clients to make the right decisions for their organisation now and for the future. Whether that is working with the public sector to build thriving communities, with regulators and financial institutions to build trust, or with a diverse range of businesses to help them achieve their goals, Grant Thornton Ireland work hard to support clients to act on the issues that matter.

At GT Ireland we don’t just predict your future, we build it.

A Career at GT

Looking for a more fulfilling role in professional services? One where fresh thinking, collaboration and diversity are valued? At Grant Thornton we do things differently.

What does this mean for you?

A career in a more inclusive working environment, a more collaborative work culture, a more supported, flexible working role, more possibilities to grow and more opportunities to help shape the future for your clients. We respect and value your experience. And we want you to bring your authentic self to work and be at your best. It is how it should be.

Grow with us

At Grant Thornton, we care about our people and work hard to make you feel valued. If you are looking to deepen and develop your skills, knowledge, and experience throughout your career, then that is what you will get, and more.

Our Benefits

Please follow this link (https://www.grantthornton.ie/careers/benefits/#faq\_5953339\_3) for information on our generous benefits package.

About the Team

Equity, diversity and inclusion

At Grant Thornton, we provide equitable opportunities for all our colleagues. We are a responsible, sustainable business where equity, diversity and inclusion (ED&I) is at the forefront of our workplace culture agenda, and today, we continue to build and develop on our existing ED&I structure and strategy to meet our workplace culture needs. People are at the heart of our business and teams built with varied individuals present diverse viewpoints, which need to be heard and valued.

We are all at our best when we are able to be ourselves and we view integrity and authenticity as integral values to bring to our day-to-day work-life at the firm. We are excited to see the personality and perspectives you will bring to our team because we know we will all benefit from them. Diversity of thought, background and experience enables better decision-making, improves the quality of our delivery, and helps us to meet the needs of our clients. Our firm is built on people and their ideas, so we want to hear all the new perspectives and fresh thinking you have to offer. You form the bedrock of our firm’s best-practice principles and we will champion you as leaders from day one.

Reward and benefits

Our reward and benefits are designed to create an environment where our people can flourish. We are committed to building a culture where our people have access to the necessary benefits to help promote a healthy lifestyle and thrive.

Recognition

We want to create a culture of recognition and celebrating success, by saying thank you to people who surpass our expectations and recognising the right values and behaviours. Our Shout Out recognition scheme is our way of highlighting and promoting achievements. Whether you simply want to say thank you, celebrate a special occasion or give an award for doing something exceptional, you can do all of this and more through the scheme.