The PwC tax scandal was a scandal involving PwC's abuse of the Australian Government's secrets to enrich itself and its corporate clients.
PwC, and other Big Four accounting firms, give advice to governments on writing tax law, and also corporations seeking to avoid those laws. This conflict of interest came to a head in 2015, when PwC leaked secret Australian Government tax plans to corporations, including Google, and used their privileged access to help corporations avoid a law they themselves helped write. The scandal has major implications for governments and consulting businesses in Australia, particularly PwC itself.
Following the scandal's public disclosure in 2022, PwC attempted to depict the scandal as a single individual acting alone, but later revelations indicated that the corruption was widespread, and included PwC Australia's CEO. Further revelations came to light that have implicated other organisations in the Australian public service and consulting industry, and which became the focus of a broader discussion about government outsourcing.
A Senate Committee concluded that PwC had engaged in a deliberate strategy over many years to cover up the breach of confidentiality.
Context The scandal occurred in the context of increasing privatisation in Australia, which began to accelerate in the 1990s. In 2015, the size of the public service was capped to 167,596 employees, which saw the public sector become increasingly reliant on outsourced labour, particularly from consulting firms.
From 2013 to 2023, state and federal government contracts for the Big Four accounting firms increased by 400%, and 1,270% by the federal government alone. By 2023, total federal and state spending on consultants totaled $20.8 billion per year, with $5 billion spent by the federal government alone. The federal government was PwC Australia's biggest client, with over $500 million in yearly contracts by 2023.
The general trend has been described as privatisation by stealth, especially for firms with a clear vested interest, like Deloitte, EY, KPMG, PwC influencing tax law.
Leadership Luke Sayers served as CEO of PwC Australia between April 2012 and May 2020, the breaches by Peter Collins took place during this period of time. Tom Seymour succeed Sayers in May 2020 until his departure as a result of the PwC Tax Scandal.
Treasury development of OECD tax law In 2012, the OECD and G20 started a project on tax base erosion and profit shifting, to try to reduce tax avoidance by closing loopholes in tax laws for multinational corporations. The Australian Treasury was tasked with carrying out the Australian implementation of the project.
In 2013, the Treasury engaged PwC partner Peter Collins to provide advice on the development of the new laws. Collins, a Melbourne resident, was the head of PwC Australia's international tax group.
This work culminated in the Multi-national Anti-Avoidance Law (MAAL), which was passed in 2015, coming into effect at the start of 2016.
Breach of confidentiality From when Peter Collins began his work at Treasury in 2013, he signed three separate confidentiality agreements to protect the secrecy of the work.
However, Collins violated these agreements, sharing confidential Treasury information with at least 53 partners at the firm, including in the tax advisory arm. This confidential information allowed PwC tax advisors to develop strategies to counter the new tax avoidance law, before the law was published in 2015.
PwC claimed that confidential information was not shared with clients, except one, later revealed to be Google.PwC, answers to written questions on notice from Senator Barbara Pocock, 5 May 2023 (received 2 June 2023), page 2
Available at https://www.aph.gov.au/Parliamentary_Business/Committees/Senate/Finance_and_Public_Administration/Consultingservices/Additional_Documents However, PwC used the confidential information to advise at least 14 companies in how to avoid the law, earning at least $2.5 million for the firm. Among the companies which attempted to apply PwC's advice to avoid the new tax laws were Uber and Facebook.
ATO response When the tax avoidance law came into effect in 2016, the Australian Taxation Office (ATO) noticed companies reacting to the new law unexpectedly quickly, restructuring their operations to avoid the new scheme. The ATO issued notices to 3 companies to amend their structures, which prevented the new scheme from being implemented.Mr Hirschhorn (ATO), 30 May 2023, Senate Economics Legislation Committee (Budget Estimates 2023-24), Official Committee Hansard, page 98. Available at
https://parlinfo.aph.gov.au/parlInfo/search/display/display.w3p;query=Id%3A%22committees%2Festimate%2F26986%2F0000%22 It was estimated this prevented $180 million from being lost annually.
The ATO wanted to investigate the situation to determine how the scheme could have been developed so quickly, especially given that some of the corporations were clients of PwC. The ATO inquired about its suspicions with PwC on multiple occasions, sending at least 46 formal notices to provide information, and raising their concerns directly with then chief executive Luke Sayers. Sayers later said he did not recall the requests.
However, PwC refused to send the ATO documents by using over fifteen thousand claims of legal professional privilege, claims which the Federal Court of Australia later determined were invalid. The ATO later told PwC in 2022 that it would apply a penalty against the firm for any false privilege claims, however, the penalties were settled confidentially in 2023. The penalties had initially been for $1.4 million, but the ATO halved that fine and blocked any further action, which was attributed to the ATO having mixed up some of the documents.
The ATO made continued attempts to learn more about the situation, without success. In 2018, secrecy laws prevented the ATO from sharing their information with the Treasury, meaning the two organisations could not combine their knowledge. The ATO also reported their suspicions to the Australian Federal Police (AFP), but the AFP refused to investigate without detailed information, which the ATO did not have the powers to gather.
Change of CEO On 5 March 2020, Tom Seymour was elected as CEO of PwC Australia, replacing Luke Sayers. This was despite internal warnings to PwC's board of directors that Seymour was a risky pick, given his history in the company's tax practice.
Tax Practitioners Board investigation
Since the AFP investigation could not proceed, the ATO referred their suspicions to the Tax Practitioners Board, a government body responsible for regulating the tax advisory industry. The Tax Practitioners Board (TPB) regulates tax practitioners to protect and assure consumers that tax practitioners meet appropriate standards of professional and ethical conduct.
The matter was referred on 2 July 2020, and the TPB commenced an investigation in early 2021.ATO answers dated 4 August 2023 to spoken questions on notice from Senator O’Neill on 30 May 2023 (question number BET044) at the Senate Economics Legislation Committee (Treasury Portfolio).
Available at: https://www.aph.gov.au/api/qon/downloadestimatesquestions/EstimatesQuestion-CommitteeId3-EstimatesRoundId21-PortfolioId17-QuestionNumber44
Michael O'Neill led the investigation into the PwC scandal, as CEO of the TPB. Michael O’Neill and Peter Collins were both members of the same tax advisory group run out of Treasury to advise the federal government on international tax avoidance strategies, and which was the subject of the TPB review. At the time of the scandal in 2015, O’Neill had been an assistant commissioner at the ATO.
Michael O'Neill was moved in November 2025 to another regulator in a more junior role in a shift that was expected to disrupt multiple inquiries into PwC. Michael O'Neill was found on 9 December 2025 to have given incorrect evidence to the NSW Supreme Court in December 2024 which was "highly unsatisfactory and damaging to Mr O’Neill's reliability and credibility as a witness" but the Court found in unnecessary to decide if Mr O'Neill knowingly gave untrue evidence.
Public revelation In December 2022, the Tax Practitioners Board announced that it had suspended Collins' tax licence for two years, due to unspecified breaches of integrity standards. The TPB also required PwC to provide training on managing conflicts of interest, and provide compliance reports to the TPB, for 2 years.
After an article was published in the Australian Financial Review, the TPB issued a press release explaining its findings. The article prompted a response from treasurer Jim Chalmers decrying the alleged conduct as "an appalling breach of trust."
The two Australian Financial Review journalists who broke the story — Neil Chenoweth and Edmund Tadros — were named Journalists of the Year at the Kennedy Awards. Collins would later be banned from providing financial services for eight years by the Australian Securities & Investments Commission (ASIC).
The CEO of PwC Australia, Tom Seymour, stated that he was deeply disappointed and the firm had taken action to protect against this happening again. Later comments from Seymour indicated that the incident 10 years ago was an isolated one, and the partner responsible was no longer with the firm. However, it was later reported that around 20-30 PwC partners and staff may have been involved.
Senate inquiry In March, a Senate Committee Inquiry commenced, focusing on the management of government consultants in general. In May, 144 emails uncovered by the inquiry were published by Australian Labor Party Senator Deborah O'Neill.
Contrary to CEO Tom Seymour's previous statements, the emails revealed that the scheme was known to at least 53 PwC partners. At least 14 global companies were advised on the new tax framework, and 3 of those companies attempted to restructure in order to avoid their tax obligations.
They also revealed that Tom Seymour himself had been included in emails relating to the scheme. Seymour stepped down as CEO, but remained employed at the firm. Kristin Stubbins took over as acting CEO.
AFP investigation On 24 May 2023, the Secretary to the Treasury, Steven Kennedy, referred the PwC matter to the Australian Federal Police (AFP) for a possible criminal investigation. The AFP began its investigation, focusing on Peter Collins in particular.
However, the AFP's impartiality was questioned after a Senate hearing the following day, where it was revealed that the AFP had nine active contracts with PwC for internal auditing. Furthermore, a former NSW police commissioner Mick Fuller was now a PwC partner - and was friends with AFP commissioner Reece Kershaw. David Shoebridge, in the Senate on 21 June 2023 targeted PwC over documents that show how it won a contract with the AFP. Both Fuller and Kershaw met on the 28 July 2022 about the crafting of a contract for PwC to review the Australian Federal Police operations in the ACT. Senator Shoebridge raised serious concerns over the issue of a perceived, or apparent, conflict of interest on the part of the AFP's commissioner.
SMS messages obtained by Shoebridge revealed about a dozen friendly messages between Fuller and Kershaw in 2023. Kershaw responded that the relationship was strictly professional and thus did not need to be disclosed. It was also revealed that the chief operating officer of the AFP, Charlotte Tressler, had worked for PwC for 13 years, and had been a decision-maker for a $794,000 contract for PwC to review its ACT policing arm. At this point the AFP paused all PwC contracts, while the review was taking place.
In October 2024, the AFP raided PwC's head office in Sydney after a joint parliamentary committee found its international arm was withholding critical information about the scandal.
PwC response