The ACCC’s decision to block IAG’s proposed acquisition of RAC Insurance has sharpened the distinction between the strategic case for greater scale and the competition evidence needed to support a transaction.
The regulator announced on 23 September that IAG must not put the acquisition into effect, following a Phase 2 assessment of Western Australian motor vehicle and home and contents insurance markets.
RAC continues to support the proposed partnership and says IAG intends to pursue a public benefit application. That process is separate from an approval to complete the acquisition.
Western Australian concentration drives the decision
The ACCC concluded that the transaction would be likely to substantially lessen competition in the state’s motor and home insurance markets.
It estimated that the proposed combination would give IAG approximately 55–65 per cent of motor vehicle insurance and 50–60 per cent of home and contents insurance in Western Australia. Those estimates describe the combined position if the deal proceeded, rather than IAG’s current standalone shares.
The assessment illustrates how a state market can determine the outcome of a nationally significant transaction. The competitive choices available to customers in that market carry more weight than the number of brands operating across Australia.
RAC’s scale argument faces a different counterfactual
RAC explains its support for the partnership through regulatory complexity, capital requirements, geographic risk concentration and the ability to invest in technology and systems.
The organisation argues that a national insurer can spread risk and build capabilities that are harder for a single-state business to replicate independently.
The ACCC’s summary of reasons reached a different conclusion about RAC Insurance’s position without the acquisition. While recognising prospective expense pressures, it assessed that RAC Insurance would continue to compete effectively.
For corporate boards, that difference is commercially significant. Demonstrating the advantages of a combined business does not by itself establish that the separate businesses would cease to provide effective competition.
A transaction case needs evidence about both the benefits of the deal and the market likely to exist if it does not proceed.
Repair-market concerns receive a separate assessment
The ACCC also considered whether the transaction could affect competing insurers’ access to repair services and competition for smash repair services in particular Western Australian regions.
It did not find sufficient evidence to reach the relevant substantial lessening of competition conclusion on those identified issues.
That distinction limits what can be inferred from the headline decision. The reasons for opposing an acquisition do not automatically establish every concern raised about its wider supply chain.
For businesses following the transaction, the published findings provide a more precise account of the competitive issues than the outcome alone.
A further process remains possible
The regulator’s framework allows parties to seek a public benefit assessment after an acquisition is not approved. RAC’s update says IAG intends to pursue that route, but the reviewed material does not establish that the proposal has been cleared through it.
The next milestone will be any further application and the decision it produces.
Beyond insurance, the case reinforces the importance of local market analysis in consolidation strategies. Capability, costs and investment remain part of the commercial case, but need to be assessed alongside the competition a transaction would remove.
Related reporting: BWA Newsdesk: ACCC blocks IAG’s proposed acquisition
Sources: ACCC opposition announcement, 23 September 2026; ACCC summary of reasons for 22 September determination; RAC company position and proposed public benefit route.
Image: Nguyen Minh / Unsplash. Illustrative stock image.
