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Available services for Australia's largest taxpayers

As significant contributors to the tax system, Australia's largest taxpayers expect and receive premium service.

Last updated 14 May 2023

Find the service channels available to help large business taxpayers comply with tax and superannuation obligations.

Self-help channels

Online services for business

Most business reporting and transactions can be done through our Online services for business. They are the most secure and efficient way to manage business reporting and transactions.

Lodgment of tax returns

Our preferred options for lodging tax returns are:

  • through SBR-enabled software, for secure online lodgment directly from financial, accounting or payroll software, often integrated with business software that's tailored to specific industries
  • through your tax agent
  • by mail.

Large business support phone service

You can contact our large business support phone service for access to officers experienced in large business income tax and GST account enquiries, including:

  • debt and lodgment obligations, including deferral requests
  • pay as you go (PAYG) withholding for large withholders.

To speak to an officer, call us on 1300 728 060 between 8:00 am and 5:00 pm (AEST or AEDT) Monday to Friday.

General business support services

You can contact us by phone on 13 28 66 between 8:00 am to 6:00 pm (AEST or AEDT) Monday to Friday for general business enquiries such as:

  • account balances
  • business registrations
  • business tax return preparation
  • business activity statements
  • Single Touch Payroll
  • excise and fuel schemes or grants.

International callers can phone us on +61 2 6216 1111 between 8:00 am and 5:00 pm (AEST or AEDT) Monday to Friday.

See Contact us for more information.

Services for top 100 taxpayers

In addition to the self-service channels, we also offer specialist relationship managers to top 100 taxpayers.

Senior relationship managers are offered as a contact point for top 100 taxpayers. These officers manage, facilitate and coordinate engagements (including escalations) for top 100 taxpayers across the ATO.

Top 100 taxpayers also have access to:

  • a key client manager (KCM) for help with tax law related matters
  • a key account manager (KAM) for help with account and transactional issues where online services are not available.

Services for large business taxpayers (other than top 100 taxpayers)

Top 1000 taxpayers can access our Large Service Team who are dedicated to assisting large businesses with turnover above $250 million.

When online services are not available, you can use this service to assist, escalate or resolve your administrative and transactional queries.

You can contact us by email

Tax agents

Tax agents have access to a range of dedicated service channels. Most business reporting and transactions by tax agents can be done online using:

The Large Service Team will refer queries from tax agents to these dedicated service channels available for tax agents, including:

Read about the arrangements we offer to provide you with certainty on high-risk arrangements before you lodge.