You do not *need* a .com.au domain to rank in Google Australia, however, Google uses country code top-level domains (ccTLDs) like .com.au as a strong ranking signal for geo-targeting as of December 2025. A .com domain *can* rank, but requires more deliberate signals to confirm relevance to Australian users.

Google’s ranking systems, including those used in December 2025, rely on multiple factors to determine a webpage’s relevance to a user’s location. These include the ccTLD, but also IP address, language targeting (using the hreflang tag), business address information in Google Business Profile, and the content itself. Currently, Google’s systems analyse user search queries and location data to prioritise results. In 2026, Google is rolling out further refinements to its ‘Helpful Content’ system, which will place increased emphasis on demonstrating first-hand expertise and local relevance. While .com domains are globally indexed, Google’s algorithms will continue to favour ccTLDs when a clear geographic intent is detected. The availability of .com.au domains is managed by auDA (the .au Domain Administration) and registration typically costs around AUD $20-30 per year.

Ultimately, Google determines ranking based on a holistic assessment of signals, with the domain extension being one component influencing geographic relevance.