Australian Business Number (ABN) Lookup Tool
Verify the registration status, company details, and GST enrollment of any supplier or client before issuing or paying tax invoices.
Search the ABN Registry
Enter an 11-digit ABN or business name to run a lookup. Designed for direct integration with the Australian Business Register (ABR).
What is an ABN?
An Australian Business Number (ABN) is a unique 11-digit number issued by the Australian Government. It acts as a public identifier for your business. Having an ABN is essential for claiming GST credits, ordering business supplies, registering a .com.au domain, and avoiding tax withholding on your payments.
ABN Tax Withholding Rules
If a supplier performs work for you and does not provide a valid ABN on their invoice, the ATO requires you to withhold 47% of their payment and send that amount directly to the ATO. Verifying your supplier's ABN before paying them helps avoid serious taxation penalties.
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