Country guide · Australia
Get an ITIN as an Australian citizen
Last updated: August 2026
Bottom line
Get an ITIN as an Australian citizen is straightforward once the Australia paperwork is in order. As a Hague Convention member, Australia issues a single apostille that the US recognizes without further legalization. Treaty status (for ITIN holders): Active US treaty available, use Form W-8BEN to claim reduced withholding once the ITIN is assigned.
ATO treats US LLCs as foreign-resident companies for Australian tax; CFC rules can apply. Structure with an Australian-licensed cross-border CPA, not a US-only attorney. This is the country-specific guide for Australian citizens to get an itin, apostille, banking, and treaty notes that change by jurisdiction. For the canonical procedural sequence (the steps everyone follows regardless of citizenship), see the main ITIN application page.
An ITIN (Individual Taxpayer Identification Number) is the IRS-issued tax ID for non-US residents without an SSN. It unlocks US tax filings, US bank accounts at issuers that require a TIN, and, most importantly for digital nomads, a US credit file. The application is Form W-7 + a valid reason code + original ID documents. Wrong reason code is the #1 cause of rejection.
What Australian citizens need to apply for an ITIN
Apostille
DFAT Australian Passport Office
~1·2 weeks, ~USD 60. As a Hague Convention member, Australia issues a single apostille that the US recognizes without further legalization.
Banking flow
Australian residents open Mercury remotely. AUD outbound via Wise to Commonwealth Bank/ANZ is the standard flow; Up and Macquarie accept Mercury inflows.
Timezone
UTC+10 to UTC+11, 15·16 hours ahead of IRS Austin. IRS Austin is on UTC-6 / Asunción Migración on UTC-3.
Country-specific note
Common: Australian SaaS founders and creators with US customers who need an ITIN for Form 1040-NR + Mercury onboarding.
Treaty status (for ITIN holders): Active US treaty available, use Form W-8BEN to claim reduced withholding once the ITIN is assigned.
Questions Australian citizens ask about itin application
How long does the apostille take for Australian citizens? +
1·2 weeks through DFAT Australian Passport Office, at roughly USD 60. As a Hague Convention member, Australia issues a single apostille that the US recognizes without further legalization.
How do Australian-resident clients usually handle banking with their US LLC? +
Australian residents open Mercury remotely. AUD outbound via Wise to Commonwealth Bank/ANZ is the standard flow; Up and Macquarie accept Mercury inflows.
What is the most common reason Australian citizens apply for an ITIN? +
Common: Australian SaaS founders and creators with US customers who need an ITIN for Form 1040-NR + Mercury onboarding.
Apply for your ITIN, Australian citizen
See the full procedural sequence on the canonical ITIN application page, or jump straight to the apply form.
Apply for your ITINKeep going
The rest of the playbook
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Stay Compliant
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Banking
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