---
title: "Australia Weighs Breaking Up the Big Four Accounting Firms"
description: "Australia's government is consulting on tough reforms to the Big Four accounting firms — Deloitte, PwC, EY and KPMG — up to and including forcing them to split their auditing arms from their consulting businesses. A run of scandals has revived a long-running question: can a firm honestly audit a company it also sells lucrative advice to?"
category: "Companies"
category_url: https://boursel.com/category/companies
author: "Olivia Chen"
published: 2026-07-01T03:43:40.000Z
updated: 2026-07-01T03:43:40.000Z
canonical: https://boursel.com/article/australia-weighs-breaking-up-the-big-four-accounting-firms
tags: ["big-four", "audit", "accounting", "regulation", "companies"]
---
# Australia Weighs Breaking Up the Big Four Accounting Firms

Australia's government is consulting on tough reforms to the Big Four accounting firms — Deloitte, PwC, EY and KPMG — up to and including forcing them to split their auditing arms from their consulting businesses. A run of scandals has revived a long-running question: can a firm honestly audit a company it also sells lucrative advice to?

Australia is contemplating one of the most aggressive shake-ups of the accounting industry anywhere — potentially **breaking apart** the firms that check corporate Australia's books.

## What's being considered

The government, through Assistant Treasurer **Daniel Mulino**, is **consulting on reforms** to the **Big Four** — Deloitte, PwC, EY and KPMG — after a string of scandals, [the Canberra Times reported](https://www.canberratimes.com.au/story/9302523/daniel-mulino-government-proposes-major-audit-firm-break-up/). The options reportedly on the table range from **barring firms from selling both audit and consulting** services to the same client, all the way to a **full structural separation** into independent companies. Other ideas include **shrinking** the maximum size of these partnerships and moving them under the national corporate regulator, **ASIC**. (Specific proposals are as reported; treat details as provisional pending the consultation.)

That would go **further** than most peers. In the **UK**, regulators pushed the Big Four toward "**operational separation**" — ring-fencing audit from consulting **inside** the firm — but stopped short of a full break-up, [the Financial Reporting Council noted](https://www.frc.org.uk/news-and-events/news/2024/10/big-four-audit-firms-conclude-transition-period-of-operational-separation/). Australia is weighing a genuine **divorce.**

## The scandals behind it

The push follows a **loss of trust.** The defining episode was the **PwC tax-leak scandal**: a partner used **confidential government tax-policy information** to help win business, an affair that engulfed the firm and Australian politics. More recent allegations have hit **KPMG** over the handling of confidential information, and **Deloitte** drew criticism after a government report it produced was found to contain **AI-generated errors.** Together, they've made "**Big Four reform**" a live political issue.

## Why audit and consulting sit uneasily together

Here's the core problem. The Big Four do two very different things: they **audit** companies — independently checking that financial statements are accurate, a **public-interest** job that depends on skepticism — and they sell **consulting** to those same companies, which is far more **lucrative.** Critics argue that mix creates a **conflict of interest**: an auditor may be reluctant to challenge a client too hard if it risks losing millions in advisory fees. Since **audit** is a relatively small share of revenue and **consulting** a large one, the incentives can pull the wrong way. Regulators from the US to Europe have wrestled with this for years.

## The firms' case

The Big Four defend their **integrated** model. They argue that combining disciplines brings **deeper expertise**, that forcing a split would **raise costs** and could **lower quality**, and that **governance changes** already made have strengthened audit independence without the need for a break-up. A structural separation, they warn, would be **costly and disruptive** for clients and the profession.

## Why it matters

For **corporate accountability**, the stakes are fundamental: an audit is only worth anything if the auditor is **genuinely independent**, and every accounting scandal — from Enron onward — has turned on that question. For the **Big Four**, a forced break-up in Australia would **reshape a global, highly profitable business** and could **embolden** regulators elsewhere to follow. And for **investors and the public**, who rely on audited accounts to trust what companies say about themselves, it's a test of whether the system that **polices** corporate honesty needs restructuring. Boursel takes no side; the takeaway is that Australia is asking, more bluntly than most, whether the firms that **audit** the economy should also be allowed to **sell it advice** — and is willing to consider **splitting them up** to settle it.

## Sources

- [Government proposes major audit-firm reform](https://www.canberratimes.com.au/story/9302523/daniel-mulino-government-proposes-major-audit-firm-break-up/)
- [Big Four audit firms conclude operational-separation transition](https://www.frc.org.uk/news-and-events/news/2024/10/big-four-audit-firms-conclude-transition-period-of-operational-separation/)