Manager - US/UK Cross Border Tax - London

About EY Tax

EY Tax is a market leader, renowned for delivering sustainable growth and empowering our people to shape their own careers. Our diverse, collaborative team advises on high-profile transactions, combining technical expertise, innovation and a genuine focus on continuous development. Join us to work on challenging, multi-country projects in a supportive, dynamic environment where your impact truly matters.

The Opportunity

This is an exciting opportunity for a UK Tax Manager to join EY’s market-leading US/UK Cross-Border Tax team. You’ll manage a diverse and complex portfolio of clients, ensuring outstanding client service across compliance and advisory engagements. You’ll also play a key leadership role — reviewing returns, managing staff, supporting their development, and upholding EY’s commitment to quality and integrity.

This role offers the opportunity to work with international clients, build deep relationships, and expand your technical expertise within a dynamic, high-performing team.

Our US/UK Cross-Border Tax team works with a broad range of family offices, ultra-high-net-worth individuals, private equity clients, and professional partnerships.

We act as trusted advisers, delivering comprehensive tax advisory services that include:

• Tax-efficient value extraction and creation
• Reorganisations and transactions
• International tax advisory
• Ongoing maintenance of client tax structures

Our services span compliance, residence and domicile issues, wealth optimisation, and estate and succession planning. With a diverse UK and non-UK domiciled client base, we frequently provide cross-border tax support through EY’s international network.

Key Responsibilties

• Manage a portfolio of clients with complex UK tax affairs, ensuring exceptional service and timely delivery.
• Plan and delegate work effectively, overseeing the end-to-end compliance process.
• Lead billing processes, ensuring deadlines and financial targets are met.
• Work with the Credit Control team to support timely payment of invoices.
• Review complex returns with accuracy and rigour, signing off completed work as agreed with senior management.
• Identify cross-disciplinary UK or US tax issues (including estate, gift, IHT, or corporate tax) and coordinate with relevant specialists.
• Coach and mentor junior team members, supporting their professional growth and performance.
• Oversee the technical, personal, and administrative development of assigned staff, escalating personnel matters as needed.
• Maintain EY’s high standards of risk management, quality, and client service.
• Act as a role model for EY’s values, maintaining confidentiality and professionalism in all interactions.
• Collaborate flexibly across teams, providing support to colleagues to ensure smooth and efficient operations.

Skills and Attributes for Success

We’re looking for an experienced and motivated professional who demonstrates:

• ACA / CTA / Tax Inspectors qualification (with full technical training), Law qualification, or equivalent tax specialist qualification
• At least five years’ experience in professional practice
• Strong technical knowledge of UK tax compliance and advisory work.
• Proven ability to deliver high-quality client service in person, by phone, and via email.
• Experience managing billing, reviewing and signing out returns, and overseeing junior staff.
• Excellent communication skills, both written and verbal.
• Strong organisational skills and the ability to work effectively under pressure.
• Great attention to detail and a high level of accuracy.
• Proven people management skills and the ability to build trusted relationships with colleagues and clients alike.
• Confidence to influence, persuade, and manage challenging client situations with professionalism and tact.
• The ability to work both independently and collaboratively as part of a team.
• Proficiency with relevant IT systems and tax software.

What we Offer

At EY, we’ll help you develop future-focused skills and gain world-class experiences. You’ll be empowered in a flexible environment and supported by a diverse, inclusive culture of globally connected teams that fuel your extraordinary talents.

• Global Exposure: Work with international clients and teams across EY’s global network.
• Career Progression: Develop new skills, take on leadership roles, and grow your career.
• Support & Coaching: Learn from industry experts and be mentored by senior leaders.
• Flexible Working: We support hybrid working and work-life balance. Minimum two days in the office.
• Total Rewards Package: Competitive salary, benefits, and exclusive EY perks.
• Inclusive Culture: Work in an environment that celebrates diversity and authenticity.