Senior Manager, Global Tax

activpayroll Ltd.; United Kingdom; Remote; GBP 110,000 - 140,000; Full time

Job summary

activpayroll Ltd. in the United Kingdom seeks a Senior Manager to lead mobility tax advisory for international clients.

You will deliver compliance and advisory services, manage complex mobility tax matters, and develop trusted client relationships while growing our Global Mobility team. You will review UK tax returns, coordinate with global partners, mentor junior advisers and contribute to proposals and RFP responses.

Qualifications

• Extensive experience in international mobility tax, including expatriate tax compliance and advisory work.
• Strong UK tax knowledge and experience preparing, reviewing, and signing UK tax returns.

Responsibilities

• Manage a portfolio of international clients delivering mobility tax compliance and advisory services.
• Act as a trusted contact for clients, offering practical guidance on UK income tax, payroll tax, and social security.
• Oversee UK tax return reviews and sign-offs, coordinating with global partners across jurisdictions.
• Review and sign off complex mobility tax matters with technical guidance.
• Build strong relationships with global partner networks to ensure seamless service delivery.

Skills

Mobility tax

UK tax knowledge

Client relationships

Attention to detail

Business development

Mentoring juniors

Job description

Senior Manager, Global Tax

Department: Global Mobility and Tax Advisory

Employment Type: Permanent

Location: United Kingdom

Reporting To: Head of Global Mobility

Description

The world of work is constantly changing, and Global Mobility is no longer simply about international assignments and secondments. Businesses increasingly operate across borders, bringing both opportunity and complexity.

Our Global Mobility team helps clients navigate that complexity, supporting international expansion, global remote working and mobility programmes. Working with our global partner network, we provide support across immigration, permanent establishment, income tax, social security, payroll tax and Global HR Services, complementing activpayroll’s global payroll offering.

As Senior Manager, you will play a key role in delivering and growing our mobility tax services. You’ll manage a portfolio of international clients, provide technical expertise, develop trusted client relationships and support the continued development of our team and services.

On a typical day...

• You will manage a portfolio of international clients, delivering mobility tax compliance and advisory services.
• You will act as a trusted point of contact for clients, providing practical advice on UK income tax, payroll tax and social security matters.
• You will oversee tax compliance activity, including UK tax returns, shadow payrolls and year-end reconciliations, working with our global partners to coordinate requirements in other jurisdictions.
• You will review and sign off UK tax returns and provide technical guidance on complex mobility tax matters.
• You will build strong relationships with our global partner network to ensure seamless service delivery across jurisdictions.
• You will support and develop junior team members, sharing technical knowledge and helping them grow as professional advisers.
• You will contribute to business development, including prospective client conversations, proposals and RFP responses.
• You will work with the Global Mobility leadership team to identify opportunities to improve and grow our services.

Does this sound like you?

• Extensive experience in international mobility tax, spanning expatriate tax compliance and advisory work.
• Strong UK tax knowledge, with experience preparing, reviewing and signing off UK tax returns and advising on income tax, payroll tax and social security.
• Excellent client relationship skills, with the confidence to make complex tax matters clear and practical.
• Excellent organisation and attention to detail, with the ability to manage multiple clients and deadlines.
• Commercial confidence, including discussing services with prospective clients and contributing to proposals and RFPs.
• A collaborative approach and the ability to build effective relationships with colleagues and partners around the world.
• A genuine interest in developing others and helping to grow our Global Mobility offering.