US Tax, Accounting, HR and Payroll

HQ Chicago, Illinois, 10 Offices Worldwide
Tax Advisory and Compliance, Accounting, Bookkeeping, HR, & Payroll
All Sectors
Across US

Areas of Expertise

IMS provides advisory and compliance services to European businesses expanding into the US, with a focus on income tax, sales tax, transfer pricing, accounting, HR, and payroll related matters. IMS can offer the right-sized advice on landing and expanding in the US. With strong links to UK and the EU, they understand the needs of scale-ups and can directly assist in mitigating risk and maximising opportunities in the US.

Working with GTM Global

IMS have been GTM’s US accounting partner of choice since 2018. They have helped over 600 UK and EU scale-ups grow their presence in the United States through establishing greenfield operations or by acquisition. They serve their clients from their US offices in Chicago, Detroit, New York, Tucson and Richmond, and their Europe offices in London, Bordeaux and Brussels.

Principal Services

Tax Planning

Cross-border Tax Planning, Federal & State Tax Advisory, and Transfer Pricing

Tax Compliance

Federal, State, & Local Income Tax and Sales Tax Filings

Outsourcing Services

Accounting, Bookkeeping, HR & Payroll Solutions

Management Consulting

Start-up Compliance, Strategic Operations, Business Planning & Financial Budgeting

Transaction Services

Audits, Due Diligence, Mergers & Acquisitions

Key Advisors

Antoine Guillaud


Is an ‘Expert Comptable’ with more than 25 years of experience assisting foreign companies to establish themselves in the US market.

Sonia Kanjee

Senior Manager, UK Practice

Is a CPA with ten years of experience in US taxation, specializing in cross border transactions for European corporations with US inbound investments and operations.

Hugues Retif

Director of Operations

Has assisted UK/EU companies in setting up their businesses in the United States for more than 15 years.

Ben Troch

Senior Manager

Has over five years of experience working with international clients, especially in the field of income taxation and international mobility.

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Upcoming Events

Useful Resources


A Better European Paper Trail…

Hear from co-founder Will Boex as he talks to GTM Global's Mark Stimpfig about their incredible journey from an idea to a successful international business.

Like to Access the GTM Ecosystem?

Does your company supply products or services that add tangible value to tech/digital scale-ups in international expansion mode? Contact us to find out how you can become a collaborator, partner or sponsor within the GTM Ecosystem.