How long will it take for my ABN to appear on the ABR website?

It will take the ATO 24-28 hours following registration to update on the ABR website, including the ABN lookup.

You have the option to select an ABN start date in your application. If you choose a future date, your ABN details will not appear on the ABR website until this date. However, you may receive an email prior to this date, stating that your ABN has been registered. It will not be active until the date specific in the application.

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Updated — Mar 15, 2019