Everything you actually need to know — what .au domains do for your rankings, how they affect AI search visibility, what they cost, and when they're genuinely worth registering.
The direct .au extension is Australia's top-level country-code domain, launched by auDA (au Domain Administration) in March 2022. Before 2022, Australian businesses had to use .com.au, .net.au, or other second-level formats. The direct .au extension is shorter, cleaner, and — critically for local service businesses — allows exact-match keyword domains that were never available in .com.au form.
The domain petershamplumbing.au could not exist as petershamplumbing.com.au because that would require a registered business named "Petersham Plumbing." The direct .au extension has more flexibility, allowing keyword-match domains that carry SEO and AI search value independent of the business entity behind them.
auDA's eligibility rules require one of the following:
| Factor | .au (direct) | .com.au | .com |
|---|---|---|---|
| Google local SEO signal | ✓ Strong | ✓ Strong | △ Weaker for AU |
| AI search geographic signal | ✓ Strong | ✓ Strong | ✗ Weak |
| AU consumer trust | ✓ High & growing | ✓ Highest | △ Lower |
| Exact-match keyword availability | ✓ More available | ✗ Most taken | ✗ Highly saturated |
| Domain cost per year | ~$20–25 | ~$15–20 | ~$15–20 |
| Requires ABN/ACN | △ Yes | △ Yes | ✓ No |
| Brand recognition (AU users) | △ Growing | ✓ Established | ✗ Generic feel |
| Lead gen asset value | ✓ High | ✓ High | △ Medium |
AI search platforms — ChatGPT, Perplexity, Google AI Overviews, Gemini, Copilot — determine which businesses to recommend using a combination of signals. Domain TLD is one of them, but it's not the most important. Here's what the 2026 research actually shows:
Based on BrightEdge, SOCi, and Ahrefs 2025–2026 research. Relative importance estimates.
Many businesses register a .au domain and then build a thin, generic website expecting rankings. A .au domain without proper schema markup, genuine local content, Google Business Profile optimisation, and consistent directory citations will not appear in AI search results — regardless of how perfect the domain name is. The domain is the foundation. The content and structure are the building.
The domain itself signals the service and location: petershamplumbing.au, electriciancamperdown.au, plumberepping.au. Google and AI platforms read this as an immediate relevance signal.
JSON-LD structured data tells AI systems exactly who you are: your name, address, phone number, service area, hours, and what you do. Without this, AI platforms may hallucinate your details or skip you entirely. BrightEdge data shows a 44% increase in AI citations for sites with structured data.
Every page with questions and answers should be marked up with FAQPage schema. This directly feeds AI answer boxes — Google AI Overviews and ChatGPT pull FAQ answers directly into their responses. If your FAQ answers "how much does a blocked drain cost in [suburb]?", that exact answer can appear in ChatGPT results.
Not a paragraph with the suburb name inserted. Real local knowledge: the housing era, the typical plumbing issues, the council requirements, the street names. AI platforms cross-reference content with other signals. Generic content gets ignored.
Your Name, Address, and Phone must be identical across Google Business Profile, Yellow Pages, TrueLocal, hipages, ServiceSeeking, and all other directories. Inconsistent NAP is the leading cause of local businesses being excluded from AI recommendations (SOCi 2026).
Pages updated within 60 days receive 28% more AI citations (BrightEdge). Adding monthly blog posts, updating pricing, or refreshing service pages keeps the site's recency signals active.
Free availability check + competitive analysis + honest assessment of whether it's worth building.