.com or .com.au? What Australian small businesses need to know before buying a domain
Starting a business means a hundred small decisions before you've made a single sale. Your domain name is one of the first — and one people rush through, because it feels administrative rather than strategic.
It isn't. Get it wrong and you're either paying a premium to buy your own name back later, or watching a competitor sit on the version you actually wanted.
Here's what actually matters — eligibility, cost, SEO, and the one move most businesses skip that costs almost nothing.
Who are you actually selling to?
This is the real question, before extension, before price, before anything else.
.com.au suits a business built on local trust — tradies, cafes, clinics, anything where "we're local" is part of the pitch. It reads as Australian at a glance.
.com suits a business selling online, nationally, or with any ambition beyond Australia. It's the extension people type without thinking, and it doesn't box you into a border you might outgrow.
Most small businesses aren't purely one or the other. Which is why, further down, the real answer usually isn't "pick one."
The eligibility trap with .com.au
A .com.au isn't just a name you buy — it's a licence tied to your business, administered by auDA (.au Domain Administration). You need an ABN, ACN, or registered trade mark, and the domain must have what auDA calls a "close and substantial connection" to your business name, trade mark, or activity.
That check doesn't end at signup. It's ongoing, and auDA has been tightening enforcement rather than loosening it:
From 20 May 2026, registrars are required to verify your business details are active before every renewal. If your ABN has lapsed, your company's been deregistered, or your business structure has changed without updating the domain record, renewal can be blocked.
If you operate through a trust, the domain must be registered to the trustee — not the trust itself, since a trust isn't a legal entity that can hold a domain licence.
Any change to your business details — name, structure, ABN status — needs to be updated on the domain record within 14 days of you becoming aware of it.
None of this means avoid .com.au. It means treat it as a live compliance item, not a one-time purchase. Whoever's named as the registrant needs to stay the correct, active legal entity for as long as you hold the domain.
There's also a newer, third option worth knowing about: direct .au domains (yourbrand.au, no "com" needed). Introduced in 2022, they carry the same Australian-presence requirement as .com.au but with more flexible naming rules. Worth a look if your ideal .com.au is already taken.
What it actually costs
Pricing is genuinely similar between the two, so don't let cost be the deciding factor:
.com.au: roughly $20–25/year at renewal across the major Australian registrars (VentraIP, GoDaddy AU, Crazy Domains). First-year promo pricing is often much lower — treat the renewal price as the real price.
.com: typically in the same $15–35/year range once you're past any first-year promo, depending on registrar.
If a quote looks dramatically cheaper than that, check what happens at renewal before you commit.
Does the extension actually help your SEO?
Short answer: not directly, but it's not irrelevant either.
Google has stated plainly that it doesn't rank .com above .com.au, or vice versa — a top-level domain isn't a ranking factor on its own. What a ccTLD (country-code domain, like .com.au) does provide is a geographic relevance signal: it tells Google, at a glance, that your site is intended for an Australian audience. For a genuinely local business, that's a small, useful nudge alongside your actual content, location pages, and Google Business Profile.
Where .com pulls ahead is reach and backlink habit — people and publishers link to .com addresses by default, simply out of familiarity, and that can compound into stronger domain authority over time if you're building content for a wider audience.
The practical takeaway: don't choose your extension hoping it'll move your rankings. Choose it for your audience, then let content, structure, and genuine local signals do the actual SEO work.
The case for owning both
This is the part worth slowing down on: buy both extensions, and point the one you're not using at your primary site with a permanent (301) redirect.
Why it's worth the extra $20-ish a year:
You stop losing customers to a guess. Someone hears about you, types the wrong extension, and lands on your site anyway — instead of a dead page, a squatter, or a competitor.
You protect your name from both directions. Hold only the .com and nothing stops someone registering yourbrand.com.au to confuse your customers or hold it for ransom. The risk runs the other way too.
It future-proofs a pivot. Local businesses go national. National businesses lean into local trust in a specific market. Owning both from day one means you're not negotiating to buy your name back later.
Done properly, it doesn't cost you SEO. A correctly configured 301 redirect consolidates ranking signals onto your primary domain instead of splitting them across two competing sites — you get the protection without the duplicate-content downside. This only works if the secondary domain redirects to your main site; if you try to run two live, separate sites with similar content, that's when it starts working against you.
The practical move
Register your primary domain first — whichever matches how you actually sell.
Grab the other extension (and consider the matching .au direct name if it's free) as a safeguard, even if you never build a second site on it.
Set up a 301 redirect from the domains you're not using to your primary site.
Make sure the ABN/entity details on any .com.au or .au registration match your current business structure — and keep them updated if anything changes.
The domain isn't the brand. But it's the front door — and it's a lot cheaper to build two doors now than to buy one back from someone else later.
Setting up a new site and not sure which domain strategy fits your business? Oh Boy Agency can walk you through it as part of a wider brand and web build.
