The Australian Competition and Consumer Commission has determined that Insurance Australia Group Limited cannot proceed with its proposed acquisition of RAC Insurance, blocking a consolidation that would have reshaped Western Australia’s insurance market. Following a Phase 2 assessment, the ACCC concluded the combination would substantially lessen competition in motor vehicle insurance and home and contents insurance.
IAG, one of Australia’s two largest personal insurers, proposed acquiring RAC Insurance from the Royal Automobile Club of Western Australia in March 2026. RAC Insurance operates under the RAC WA brand and is the market leader in both motor vehicle and home contents insurance in Western Australia. The combined entity would have operated multiple insurance brands including NRMA alongside RAC. Post-acquisition, IAG would have controlled approximately 55 to 65 percent of the motor vehicle insurance market and 50 to 60 percent of the home and contents insurance market in Western Australia, representing a substantial increase in its concentration in these categories.
The ACCC’s opposition centered on market concentration and competitive dynamics in Western Australia. The regulator determined that combining two effective and substantial competitors would leave insufficient competitive constraint from alternative insurers. ACCC Chair Gina Cass-Gottlieb noted the acquisition would eliminate head-to-head competition between two major players and create market concentration where remaining competitors could not adequately limit IAG’s power. The ACCC conducted extensive inquiries with the parties, other insurers, and industry associations. This decision follows the ACCC’s previous opposition in December 2025 under the informal merger regime, with IAG renotifying under the formal regime that commenced January 1, 2026.
The decision carries significant implications for IAG’s strategy. A major growth initiative in a key market has been eliminated, requiring the company to reconsider capital allocation and competitive positioning in Western Australia. The outcome signals the regulator’s approach to consolidation in concentrated insurance markets, with potential implications for future M&A activity in financial services. Shareholders should assess how IAG will respond and whether the blocked acquisition affects management’s broader growth agenda.
The path forward is not entirely closed. IAG may lodge a public benefit application with the ACCC, arguing that consumer or public benefits from the acquisition outweigh its competitive costs. The ACCC would have 50 business days to assess such an application. Success would be unusual, as public benefit arguments face a high evidential burden. Investors should monitor whether IAG pursues this option, as the outcome could affect strategic priorities and capital allocation for the company. The announcement has been classified as price sensitive and flagged as material by the ASX.
View the full ASX announcement (PDF)
About Insurance Australia Group Limited (ASX: IAG)
Insurance Australia Group Limited is the largest general insurance company operating in Australia and New Zealand. The company provides a range of personal and commercial insurance products, primarily motor vehicle and home insurance, selling insurance under many brands including NRMA, CGU, SGIO, and SGIC in Australia and NZI, State, AMI, and Lumley in New Zealand. Headquartered in Sydney, IAG underwrite over 14 billion dollars of premium per annum.
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