How to get an ABN for your trade business

Do tradies need an ABN?

Yes, if you're running a business — quoting jobs, invoicing customers, working for yourself. An ABN, an Australian Business Number, is the 11 digit number that identifies your business to the government and to your customers, and it goes on every quote and invoice. Without one, business customers may have to withhold 47% of your payment. It is for people carrying on an enterprise, which a tradie doing paid jobs clearly is, and it's free, so there's no reason not to. It's separate from your Tax File Number, which you keep as an individual.

How to apply (free, step by step)

1. Go to the Australian Business Register at abr.gov.au and start an ABN application (it's also offered through the government's Business Registration Service, where you can grab an ABN and register a business name at the same time).
2. Have your Tax File Number handy, plus your personal details and when your business activity starts.
3. Answer the questions about your business — as a tradie you'll typically apply as a sole trader.
4. Submit. If everything verifies, your ABN is issued on the spot. If it's referred for a manual review, the ABR aims to decide within 20 business days, and it can take up to 28 days where details can't be verified (ABR, read 22 September 2026).

It is free. If a website wants to charge you a fee to get your ABN, you're on the wrong site, a third party one, go direct to abr.gov.au.

The questions that trip people up

The form is short, but four fields catch tradies out. What they actually mean:

• "Business structure" — a solo tradie is a sole trader. Only pick company, partnership or trust if you've deliberately set one up; each brings its own tax and paperwork, and most tradies don't need one to start.
• "Date you need your ABN from" — the day you start, or will start, trading. You can post-date it up to six months ahead if you're not working yet. Don't backdate it to before you actually began — the ABR can question that.
• "Main business activity" — the ABR maps your words to a standard code, so be plain and specific: "electrical services", "carpentry", "plumbing". It's how your trade is classified, not a place for marketing.
• "Are you carrying on an enterprise?" — you're entitled to an ABN only if you're genuinely running a business: quoting, invoicing, taking real jobs. A hobby or a one-off private sale doesn't qualify, and saying otherwise is the fastest way to get referred for review.

Answer those plainly and it usually issues on the spot. Vague or unverifiable answers are what send it to the manual queue.

ABN vs GST vs business name — they're different things

• ABN — identifies your business. Free. You need it to invoice properly.
• GST registration — separate. Only required once your turnover hits $75k (see do I need to register for GST?). You can have an ABN without being GST-registered.
• Business name — if you trade under a name that isn't your own (e.g. "Dave's Electrical"), you register that separately (a small annual fee). Trading under your own personal name doesn't need a registered business name.

Already got an ABN? Check what the register says about it

Worth doing once a year, and worth doing before you put it on an invoice you have not sent in a while. The register is public, and this searches it live — it will show you the entity name on record, whether the ABN is active, whether it is registered for GST, and any business names attached to it.

Two things to look at. A cancelled ABN — which happens if the ATO decides you are no longer carrying on an enterprise — is still a number you can type onto an invoice, and a customer who checks will find it inactive. And the GST line is the one people get wrong in both directions: charging GST while the register does not show you as registered, or forgetting to charge it after you registered.

If the details are not what you expected, update them through the Australian Business Register — that is where the record lives, and it is free.

Put your ABN on every job

Once you've got it, your ABN should appear on every quote and invoice. Yamate stores it once and adds it to everything automatically — or use the free invoice generator for a one-off, which can pull your details straight off the register the same way this page does.

What has to be on the invoice besides the ABN is a short, specific list — see tax invoice requirements.

Want the job before it is advertised? Homeowners post their problems in Who Do I Call? Australia, our free Facebook group. Answer one well and you are the tradie they ring. Join, help out, and put your business in front of the people asking.
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Related

Do I need to register for GST? · How much tax to put aside

Official source for building and construction tradies: Building and construction tradies – tax essentials (ATO).

General information for Australian sole traders, not tax or legal advice. Check current requirements at abr.gov.au and business.gov.au. Last updated September 2026.