Choose a domain name that matches your business name, is easy to say over the phone and is spelled the only way people would guess. Keep it short, skip hyphens and numbers, and check trade marks and social handles before you buy. For an Australian business, start with the .com.au, register it in the business’s own name, and secure the matching .au too.
Key takeaways
- A .com.au must match or relate to your business name, trade mark or what you sell, under auDA’s rules.
- If you have to spell it out on the phone, it will cost you emails and enquiries.
- Keywords in a domain have “hardly any effect” on Google rankings, according to Google.
- A domain gives you an address, not legal rights to the name. Check the trade marks register first.
- Register it to the business, with an ABN that stays active, or renewal can be blocked.
Why does your domain name matter so much?
Your domain becomes your website address and every staff email address. It goes on vans, invoices, business cards and Google listings. Changing it later is possible, but it means redirects, new signage and months of old emails bouncing around. Our guide to changing your domain name without losing SEO shows how much work that is.
So it’s worth an hour of thought now. These 11 rules are the ones we see matter in practice. If you haven’t registered the business name yet, read how to register a business name and domain in the right order first.
The 11 rules
1. Match your business name
The simplest domain is your business name, exactly. Customers type what’s on your sign. For a .com.au it’s also the safest choice, because auDA’s rules say the name must match or abbreviate your business or company name, a trade mark, or a product or service you provide (auDA).
In August 2026, auDA’s Board also approved in principle removing the product and service option for new .com.au names (IT Brief). That change is still a proposal, but a name that matches your business won’t be affected either way.
2. Pass the phone test
Say the domain out loud to someone who hasn’t seen it, then ask them to type it. If they get it wrong, so will your customers. Watch for:
- words with two common spellings (colour/color, jewellery/jewelry)
- sound-alikes (for/four/4, right/write)
- names that need “that’s with a K” every time
Try it as an email address too: “[email protected]” is said dozens of times a week.
3. Keep it short
Shorter names are easier to remember, type and fit on a van. There’s no magic length, but if your business name is long, an obvious shortening often works better. “Smith and Daughters Plumbing” might become “smithplumbing” or “smithanddaughters”. Under auDA’s rules, an abbreviation or acronym of your business name still counts as a match for .com.au.
4. Avoid hyphens and numbers
Hyphens are allowed, but nobody says them naturally. “Gold-Coast-Pools” becomes “gold dash coast dash pools”, and many people will type the version without hyphens, which may belong to a competitor. Numbers have the same problem: is it “4” or “four”? If your business name includes one, register both versions and point one at the other.
5. Read it as one word
Words run together can spell something you didn’t intend. Write the domain in lower case with no spaces and read it fresh, or show it to a few people. An odd reading is easy to miss and impossible to unsee once a customer points it out. If there’s an awkward join, that’s a rare case where a hyphen, or a different name, is better.
6. Don’t box yourself in
A suburb or one product in the name can be great for a local tradie. It can also be a problem if you move, expand or add services. “Capalaba Pool Fencing” struggles to sell bathroom renovations in Ipswich. Ask where the business might be in five years, not just today.
7. Don’t chase keywords
Ten years ago, people bought names like “best-cheap-plumber-brisbane” to rank in Google. It no longer works. Google’s SEO starter guide says keywords in a domain name “have hardly any effect beyond appearing in breadcrumbs” (Google Search Central). A memorable brand name builds more value than a string of search terms.
8. Check trade marks and business names
A domain gives you an address, not legal rights to the name. Business.gov.au warns that a domain “doesn’t give you any IP protection for that name”, and you can’t use a name someone else has registered as a trade mark (business.gov.au). Before you buy, search:
- IP Australia’s free TM Checker, for registered trade marks
- the ASIC business names register, for existing businesses
- Google, for anyone already trading under the name in your industry
auDA makes the same point: registering a business name “does not grant you exclusive ownership or protection of that name”. Only a registered trade mark does that (auDA).
9. Check social handles at the same time
Customers expect to find you as the same name on Facebook, Instagram and LinkedIn. Check those handles before you commit. If the exact name is taken everywhere, a small, consistent change (adding “au” or your trade) is better than five different versions.
10. Start with .com.au, then protect the rest
Most Australian businesses use .com.au. It made up 74.9% of .au domains in May 2026, according to the auDA .au Product Guide 2026. The same guide reports auDA research that 8 in 10 Australian consumers are more likely to trust businesses with .au websites.
Once you have the .com.au, consider the matching .au direct name and, if you trade overseas, the .com. Point them all at one website. Our domain names for Australian businesses page compares the options, and our guides to buying the .au direct version and .com.au vs .com go into more detail.
11. Register it properly, and keep it
Register the domain in the business’s legal name, with its ABN or ACN, under an account the business controls. Not your web designer’s, and not a staff member’s personal email. Then keep the details current. Since 20 May 2026, a .au renewal can be blocked if the ABN or ACN behind it is no longer active (SmartCompany). Turn on auto-renew, and keep the contact email one you check.
What do good and bad domain names look like?
These examples are made up to show the rules, not real businesses:
| Domain | Verdict | Why |
|---|---|---|
| harbourelectrical.com.au | Good | Matches the business name, short, easy to say. Watch the “harbour” spelling. |
| best-cheap-electrician-sydney.com.au | Poor | Hyphens, keyword stuffing, may not match the business name |
| 4seasonslandscapes.com.au | Risky | “Four” or “4”? Register both and redirect one |
| kmjtradingservicesaustralia.com.au | Poor | Too long, hard to say, easy to mistype |
| noosabakehouse.com.au | Good | Short and local, as long as the business stays in Noosa |
What should you do once you’ve chosen?
- Register it straight away. Good names go quickly, and an available name today may not be there next month.
- Add the matching .au and any obvious variations you’d hate to see a competitor own.
- Set up business email on the new domain before you print anything.
- Choose where the website will live. Our Australian web hosting keeps your site and email close to your customers, with free SSL and free migration.
- Record the login and renewal date somewhere the business, not one person, can find it.
Frequently asked questions
Should my domain name be the same as my business name?
Ideally, yes. It’s what customers type, and for a .com.au auDA requires the name to match or relate to your business name, a trade mark, or what you sell. An obvious abbreviation of a long business name also counts.
Is it bad to have a hyphen in a domain name?
It’s allowed, but it’s awkward to say and easy to forget. Many people will type the version without the hyphen. Use one only when running the words together reads badly, and consider registering both versions.
Does a keyword in my domain help SEO?
Very little. Google says keywords in a domain name have hardly any effect beyond appearing in breadcrumbs. Content, reviews and a fast, useful website matter far more than the name.
Should I buy .com.au or .au?
Start with .com.au, which most Australian businesses use and customers expect. Then register the matching .au direct name if it’s available, so nobody else can take it, and point it at your main site.
Can someone take my domain if I have a trade mark?
A registered trade mark gives you grounds to challenge a domain that copies it, through auDA’s dispute process for .au names. It’s far easier to register the domain yourself first, alongside the trade mark.
Sources
- com.au and net.au rule changes, auDA
- SEO Starter Guide, Google Search Central
- Choose a business name, business.gov.au
- How trade marks, business names and domain names benefit and protect your brand, auDA, 3 July 2023
- .au Product Guide 2026, auDA
- The 90-day domain name rule, SmartCompany, 30 July 2026
- auDA faces backlash over com.au eligibility shake-up, IT Brief, 25 September 2026