Introduction

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Introduction

Methodology

Tax Controversy Leaders is a guide to the leading tax dispute resolution lawyers and advisers in the world. In addition to highlighting tax professionals, the guide also includes litigators and barristers who may not practise tax on a day-to-day basis.Inclusion in this guide is based on a minimum number of nominations received. Besides the required number of nominations, entrants must also possess evidence of outstanding success in the past year and consistently positive feedback from peers and clients. Firms and individuals cannot pay to be recommended in Tax Controversy Leaders.

With the increasing realisation that effective dispute resolution is as much about preventing a dispute as it is about managing and resolving one after it arises, the use of advance and real-time negotiations between taxpayers and tax authorities continues to rise. Facilitating these processes is therefore of the utmost importance. Getting the right advice, from the right people, is essential. When considering a transaction or other business activity which could be open to a tax challenge, it has never been more important to be proactive and ensure you have a strong team of advisers on hand to assist. This guide can help you make sure you are picking the right people.

Alternative dispute resolution (ADR) – in the form of pre-filing agreements, cooperative compliance, administrative appeals, mediation and arbitration – has continued to prosper as a mechanism that can bring benefits for tax authorities and taxpayers. But ADR regimes around the world differ markedly. Most are in their infancy, and best practices are still being established but, from a taxpayer perspective, ADR-related transparency obligations are the trade-off for developing a more cooperative relationship with the authorities.

Mutual agreement procedure statistics indicate a surge in tax audits and disputes, while instances of triangular cases are also on the rise, implying that national authorities are increasingly staking claim to the same income.

Authorities around the world were already becoming more aggressive before the global financial crisis, particularly in the area of anti-abuse rules, and figures such as the Australian Tax Commissioner winning 75% of cases in 2013 indicate the importance of enlisting the help of quality advisers to reach a satisfactory outcome. Many authorities have also invested in hiring senior private sector professionals, so taxpayers must be prepared to engage with increasingly knowledgeable and technically-skilled personnel.

But this hiring trend goes both ways. Many of the leaders in this guide have experience of working at various national tax authorities. An acute understanding of both sides' approach to controversy and litigation matters means taxpayers can establish a position of comfort and confidence, and with levels of authority aggression in certain jurisdictions reaching new heights, this can be an invaluable asset in your tax dispute defence arsenal.

The practitioners in this fourth edition of Tax Controversy Leaders have experience in all stages of tax controversy and can therefore cater for the full range of taxpayer's dispute resolution needs in each of the 51 jurisdictions covered.

Matthew Gilleard,

Corporate tax editor, International Tax Review

more across site & shared bottom lb ros

More from across our site

The firm’s eye-catching UK launch is a major statement of intent, but it will face stern opposition in its quest to be the top global tax player
The postponement came after industry representatives flagged implementation issues with the registration regime; in other news, firms made key tax partner additions
Despite the increased yield, the time taken to resolve enquiries was at a six-year high, new HMRC statistics have revealed
The High Court’s dismissal of barrister Setu Kamal’s legal challenge represents the first successful strike-out under a new law on SLAPPs
IP lawyers, who say they are encouraging clients to build up ‘tariff resilience’, should treat the risks posed by recent orders as a core consideration in cross-border licensing
As Coca-Cola awaits a crucial 11th Circuit Court of Appeals decision this year, its multibillion-dollar tax dispute could have profound implications for investors, cash flow, and corporate transparency
However, women in tax face greater career obstacles than their male counterparts, an exclusive ITR survey of more than 100 women tax leaders revealed
Under Jeff Soar’s leadership, WTS UK aims to scale to 100 partners within five years and challenge the big four
As the firm embarks on a major shakeup of its EMEA partnerships, some staff will be watching nervously
The buyout of Hucke and Associates continues Ryan’s streak of firm acquisitions; in other news, a UK appeal against VAT on private school fees was dismissed
Gift this article