You don’t have to display your ABN on your website. There’s no law that forces it. The legal duty to show your Australian Business Number (ABN) applies to your invoices and receipts, not your web pages, so a missing ABN in your website footer won’t land you in trouble.
This is one of those niggly questions that’s easy to put off and easy to get wrong. You’ve registered the ABN, the website’s nearly live, and now you’re second-guessing whether it has to go somewhere public. The good news: the rule is simpler than it feels, and once you know where your ABN actually has to appear, you can stop worrying about the rest.
- You don’t legally have to display your ABN on your website. No law requires it. Your invoices and receipts are the documents that legally must carry it.
- Leave your ABN off an invoice and you can lose 47% of the payment. A business client may have to withhold 47% and send it to the ATO until you provide a valid ABN.
- Showing your ABN on your website is a trust signal, not a legal duty. The footer, About page, or terms and conditions are the usual spots.
- Your ABN is already public. Anyone can look up your name, status, GST registration, and location on ABN Lookup for free.
- Your ANZSIC industry code is not public. ABN Lookup hides it. Only you and eligible government agencies can see it.
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Do you legally have to display your ABN on your website?
No. There is no Australian law that says you must display your ABN on your website. You can run a perfectly compliant business website without the number appearing anywhere on it.
The confusion comes from a real rule that sits next door. If you’re trading, you are required to show your ABN on the tax invoices and receipts you issue. People mix the two up and assume the website carries the same duty. It doesn’t. The website is optional; the paperwork is not.
One quirk catches people out. To register a .com.au or .net.au domain, you must supply a valid ABN at sign-up. That’s a condition of getting the domain, set by the body that runs Australian domains. It is not a requirement to then publish the ABN on the site once it’s live. If you want the detail on that, see our guide on whether you need an ABN to set up a website.
Where you must display your ABN (and where it’s optional)
Here’s the practical split. Some places are non-negotiable. Others are smart, but your choice. Knowing which is which saves you from both fines and faff.
| Where | Required? | Why |
|---|---|---|
| Tax invoices and receipts | Yes | The payer needs your ABN to avoid withholding tax and to claim GST credits. |
| Quotes and estimates | Best practice | Lets clients verify you’re registered before they commit. |
| Your website (footer, About, contact) | Optional | A trust signal that shows you’re a registered business. |
| Terms and conditions, privacy policy | Usually appears anyway | These documents name your business entity, so the ABN often sits there by default. |
| Email signatures and social bios | Optional | Builds legitimacy, especially if you send quotes or contracts by email. |
If you do decide to display your ABN on your website, don’t overthink the placement. The footer is the cleanest option, because it shows on every page. Your About or contact page works too. You only need it in one obvious place. Repeating it on every page does nothing extra.
There’s a quiet reason to add it. When a customer is deciding whether to trust a business they’ve never heard of, a visible ABN tells them you’re real and registered. It costs you nothing and removes a small doubt. That’s why most established Australian businesses show it even though no rule says they have to.
What happens if you leave your ABN off an invoice?
This is where the stakes are real, and it has nothing to do with your website. If you issue an invoice without your ABN, the business paying you may be legally required to withhold 47% of the payment and send it to the ATO. This is called no-ABN withholding.
Put numbers on it. On a $1,000 invoice with no ABN quoted, your client withholds $470 and pays you $530. You can claim the withheld amount back when you lodge your tax return, but that’s months away. In the meantime, your cash flow takes the hit. The rule only bites on payments over $75 (excluding GST), and a handful of exceptions exist, but for ordinary business-to-business invoices the safe assumption is simple: no ABN, 47% gone.
Note the figure. Older articles still quote 46.5%. The rate has been 47% since 1 July 2017, because it tracks the top marginal tax rate plus the Medicare levy. If a guide is still citing 46.5%, it hasn’t been updated in years, which tells you something about the rest of it.
What information about your ABN is already public?
Plenty of business owners worry about putting their ABN on their website while not realising the number is already out in the open. Your ABN sits on a free public register called ABN Lookup. No login needed. Anyone can type in your ABN or business name and see your core details in seconds.
The information that’s public includes:
- Your ABN, and whether it’s active or cancelled, with the date of effect
- Your entity name and entity type (sole trader, company, trust, and so on)
- Your GST registration status and the date you registered
- Any registered business names
- Your main business location, shown as a state and postcode (not a full street address)
- Your ACN or ARBN, if you have one, and any charity or deductible gift recipient status
What stays private is just as useful to know. Your full street address, your email, your phone number, and the names of associates or directors are not shown on the public lookup. So displaying your ABN on your website doesn’t expose anything that isn’t already findable by anyone who searches the register.
Does ABN Lookup show your ANZSIC code?
No. Your ANZSIC code, the industry classification you picked when you registered, is not shown on ABN Lookup. It’s treated as non-public ABR data. The only people who can see it are you (after logging in to the Australian Business Register with your myGovID) and eligible government agencies that use it to confirm what industry you’re in.
This trips up a lot of people, because the ANZSIC code feels like it should be searchable alongside everything else. It isn’t. If you want to check or change your own code, you log in to the ABR, not ABN Lookup. And if you’re trying to find another business’s industry code, the public register won’t give it to you.
Why does this matter for your website question? Because it confirms the principle: the register decides what’s public, and it draws the line tighter than most owners assume. Your industry code, contact details, and address stay private. Your name, status, and GST registration are open. Showing your ABN on your site adds nothing to that public picture.
What we see in Lawpath consultations
The website question is rarely the one that costs people money. These are the patterns our advisors run into again and again, sitting right next to it.
The ABN and GST mix-up. A new business registers an ABN early, then assumes that’s the tax box ticked. It isn’t. An ABN doesn’t register you for GST. Once your turnover hits $75,000 in any rolling 12-month period, you have 21 days to register for GST separately. We regularly speak with founders who crossed that line months earlier without noticing, and now owe backdated GST. Your GST status is also public on ABN Lookup, so it’s visible to anyone checking.
Sole traders and the name on the register. Sole traders are often surprised that ABN Lookup shows their personal legal name, because a sole trader’s ABN is registered to them as an individual, not to a separate company. If you’d rather your own name wasn’t the public face of your business, the fix is to register a business name and trade under that instead.
Clients check you before they pay. Before a business pays an invoice, they can look you up on ABN Lookup. If your ABN shows as cancelled, or you’re charging GST but the register says you’re not GST-registered, that mismatch can freeze your payment while they query it. Keeping your details current isn’t admin for its own sake. It’s how you get paid on time.
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Frequently asked questions
Do I have to display my ABN on my website?
No. There’s no law requiring your ABN on your website. It’s best practice and a trust signal, but the legal display duty applies to your invoices and receipts, not your web pages.
Where should I display my ABN on my website?
The footer is the most common spot, because it appears on every page. Your About page, contact page, terms and conditions, or privacy policy work too. One clear placement is enough; you don’t need it everywhere.
Is my ABN private?
No. Your ABN and key details sit on ABN Lookup, a free public register. Anyone can search your ABN or business name and see your status, entity type, GST registration, and business location.
Does ABN Lookup show my ANZSIC code?
No. Your ANZSIC industry code is non-public. Only you (via a myGovID login to the ABR) and eligible government agencies can see it. The public ABN Lookup page doesn’t display it.
What happens if I don’t put my ABN on an invoice?
The business paying you may be required to withhold 47% of the payment and send it to the ATO. You can claim it back at tax time, but it hits your cash flow now. The rule applies to payments over $75 excluding GST.
Do I need an ABN to register a .com.au domain?
Yes. To register a .com.au or .net.au domain you must supply a valid ABN or ACN at sign-up. A plain .com domain has no such requirement and is open to anyone.
Does a sole trader’s name show on ABN Lookup?
Yes. A sole trader’s ABN is registered to the individual, so your legal name appears. Registering a business name lets you trade and appear under that name instead of your own.
Can I hide my details on ABN Lookup?
Generally no. The core details are public by law. You can apply to have certain information suppressed only in limited cases, such as where publishing it would put your personal safety at risk.
The bottom line
You’re not doing anything wrong by leaving your ABN off your homepage. Put it on your invoices, where the law actually wants it, add it to your website footer for good measure, and you’re sorted. This was never the big compliance risk it felt like at 11pm before launch.
The bigger wins are getting the ABN itself right and keeping your details current, so you get paid without hold-ups. If you haven’t got your number yet, register your ABN with Lawpath in minutes and tick the first job off the list. Want the full picture on the number first? Read our plain-English ABN explainer. And if your website still needs its legals, our website terms and conditions template and privacy policy template get you compliant without the lawyer’s bill.
