ABN Verification for Tradies: What Customers Should Check

Published 2026-05-03 · 4 min read

How to verify an Australian tradie's ABN in 30 seconds — what an ABN proves, what it does not, warning signs, and the difference vs a trade licence.

Verifying an Australian tradie's ABN takes about 30 seconds and protects you from unlicensed operators, cash-only scams and tradies whose business has been deregistered. This guide explains what an ABN proves, how to check one, and what to do when something does not add up.

What an ABN actually proves

An Australian Business Number is an 11-digit identifier issued by the Australian Business Register. Holding a current ABN means:

The business has registered with the ATO.
It can legally issue tax invoices.
If turnover is above $75,000 a year it is registered for GST.
The entity name, structure (sole trader, company, partnership) and main business location are publicly searchable.

Holding an ABN does not prove the tradie is licensed, skilled, insured or experienced. It is the baseline check, not the only check.

How to check an ABN in 30 seconds

Go to abr.business.gov.au.
Enter the ABN (11 digits) or the business name.
Click search.
Read the result page.

Look for:

ABN status — must be 'Active'. 'Cancelled' means the business is no longer registered.
Entity name — must match the name on the tradie's quote.
GST registration — if the tradie is charging GST, they must be registered.
Main business location — should be in the same state as the work, or close.
ABN registration date — a brand-new ABN (less than 6 months) is not necessarily bad, but combine with other checks.

TaskerAsker performs this check automatically before any tradie can quote on jobs — verification badges are visible on every provider profile, so customers do not have to repeat the lookup.

What an ABN does not prove

An ABN does not tell you whether the tradie:

Holds a current trade licence (separate state register).
Has public liability insurance.
Has workers compensation for any employees.
Has done quality work for past customers (check reviews).
Has experience with your specific job type.

Use the ABN check as the first gate, then layer on the licence check, the insurance certificate request, and a few minutes of review reading.

Warning signs around ABNs

Tradie cannot or will not provide an ABN.
The ABN they provide comes back cancelled.
The entity name on the ABN does not match the name on their quote or invoice.
The ABN is registered to a different trade or industry (e.g. an ABN registered for 'general retail' on a plumbing job).
They charge GST but the ABN shows no GST registration.
The ABN was registered last week but they claim 20 years of experience.

Any one of these is a reason to pause and ask questions; two or more is usually a reason to walk away.

Licence vs ABN: the difference

	ABN	Trade licence
Issued by	Australian Business Register (federal)	State regulator (NSW Fair Trading, VBA, QBCC, etc.)
Cost to obtain	Free	Several hundred dollars per year, plus qualifications
Proves	Business is registered with the ATO	Tradie has met state-set training, exam and insurance standards
Required for	Issuing tax invoices, GST registration	Plumbing, electrical, gas, building work above thresholds

What to do after the check

If the ABN checks out:

Save a screenshot of the ABR result.
Move on to the licence check (for plumbing, electrical, gasfitting and building).
Request the public liability Certificate of Currency.
Get the quote in writing on letterhead with the ABN printed.

If something does not add up — ask the tradie to clarify. A legitimate tradie will explain a recent business name change or a switch from sole trader to Pty Ltd in seconds. An evasive answer is itself a warning sign.

Post your job free and verified, ABN-checked Australian tradies will send you competitive quotes — usually within a few hours.

Frequently asked questions

What is an ABN and why do tradies need one?

An Australian Business Number (ABN) is an 11-digit identifier issued by the Australian Business Register. Tradies need an ABN to issue tax invoices, register for GST (compulsory above $75,000 turnover), and contract with most platforms and businesses.

How do I check an ABN as a customer?

Search abr.business.gov.au — it's free and instant. Enter the ABN or the business name. The result shows entity name, ABN status, GST registration date and main business location.

Can a tradie work without an ABN?

Technically yes — they can take cash for small jobs as a hobbyist — but they cannot legally issue a tax invoice. For any work above a few hundred dollars, no ABN is a serious warning sign.

What does it mean if an ABN is 'cancelled'?

A cancelled ABN means the tradie's business is no longer registered. They cannot legally issue a tax invoice and the business may no longer be insured. Walk away.

Is having an ABN the same as having a trade licence?

No. ABN registration is administrative and free; it does not verify trade competence. A licence is issued by the state regulator after qualifications and exams. Plumbers, electricians, gasfitters and builders need both.

Do sole traders and companies have different ABN structures?

Yes. Sole traders register their personal name; companies register a Pty Ltd entity. Both have ABNs. The ABR result shows the entity type so you can confirm who you are actually contracting with.