What You Need to Know About Business Names and ABNs

If you're a bit fuzzy on the difference between an ABN and a business name, you're not alone — almost everyone going out on their own for the first time gets these two mixed up. Here's the plain-English version.

What's an ABN?

ABN stands for Australian Business Number. Think of it like your business's ID number — an 11-digit number the government uses to know your business exists and to keep track of tax stuff.

You need one to legally invoice people as a business. Without an ABN, anyone paying you more than $75 is technically supposed to withhold 47% of the payment for tax — which no client wants to deal with, so in practice, no ABN usually means no job.

Getting an ABN is free and you apply for it yourself online through the Australian Business Register (abr.gov.au). Most people get one the same day.

What's a business name?

This is the part that trips people up. A business name is not the same thing as an ABN — it's a separate, extra step, and you only need it in certain cases.

Here's the simple rule: if you trade under your own personal name — like "John Doe" — you don't need to register a business name. Your ABN already covers that.

But if you trade under any other name — like "Bloggs Carpentry" instead of "John Doe" — that name has to be officially registered with a different government body called ASIC (the Australian Securities and Investments Commission). This costs a small fee (it changes over time, so check ASIC's site — asic.gov.au — for the current price) and normally covers you for 1 or 3 years at a time.

Why does this rule exist? Because in Australia, anyone can look up who's actually behind a business name before they hire them. Registering it is what makes that lookup work — it links "Bloggs Carpentry" back to the real person (you) who's legally responsible for the work.

The steps, in order

You're encouraged to apply for your own ABN — it's free and fairly straightforward, so there's no need to pay an agent to do it for you. The early days of a business are a time to protect your cash.

You're encouraged to register your own business name directly with ASIC — it's the lowest-cost way to do it, and fairly straightforward, so there's no need to pay an agent to do it for you. The early days of a business are a time to protect your cash.

Why it actually matters

It's the law. Trading under an unregistered business name (when you're required to register it) can get you fined.

Clients check. More people than you'd expect look a business up before they hire it. A registered name (or your own name, correctly used) looks legitimate — because it is.

Banks and insurers ask for it. Opening a business bank account or getting a business insurance policy under a trading name usually requires proof it's registered.

It's genuinely easy to change your mind early. Loads of new sole traders start out unsure what to call themselves, then settle on a name a few weeks or months in. That's completely normal — just update your ABN/business name records and your BuildSpot site to match once you've decided.

This page is a general, plain-English guide, not legal or tax advice. Rules and fees can change — always check abr.gov.au and asic.gov.au for the current details, or ask an accountant if you're not sure which situation applies to you.