Staying Compliant During Major ATO & Trust Changes from July 2026

Key compliance changes taking effect mid-2026

• PAYG withholding tax tables have been updated. All schedules and tax tables will apply from 1 July 2026, including revised rates and thresholds in withholding schedules (e.g. NAT 1004, 3539 etc.). (softwaredevelopers.ato.gov.au)
• Combined Global and Domestic Minimum Tax Return (CGDMTR) replaces legacy forms (Foreign Lodgement Notification, AIUTR, DMTR) for multinational enterprises and large groups. Lodgment deadlines—for those with 31-December fiscal year end—are by 30 June 2026. (bdo.com.au)
• Under the Modernisation of Tax Administration Systems (MTAS), from 1 July 2026 there will be mandatory Tax File Number (TFN) reporting for closely held trusts. Trust distribution statement data will be used to prefill individual beneficiaries’ returns; e-lodge software limitations on beneficiary numbers will lift for trusts in future tax times. (pwc.com.au)

What this means for taxpayers & entities

For trustees of closely held trusts

• Ensure your trust distribution statements are accurate and include correct beneficiary names, TFNs, and amounts because this information will be used for ATO pre-fill and compliance validation.
• Prepare for enhanced transparency. Errors in trust reporting may lead to delays or audit attention.

For large entities/multinationals

• Complete the CGDMTR submission—in a single form—combining what were previously three returns. Non-compliance or missing timelines may incur penalties.
• Review your fiscal year end and closing procedures to ensure data collection, especially for complex structures, to prepare all required disclosures.

For employers & payroll providers

• Implement the new PAYG withholding rates and schedules by 1 July 2026. Payroll systems must be updated; employee contracts with salary sacrifice etc must be adjusted.
• If you use e-lodge or tax software, ensure beneficiary numbers and trust reporting modules are ready when limitations are removed.

Penalties & risks

• Incorrect withholding amounts lead to payroll shortfalls and potential liabilities for the business.
• Trusts that misreport or fail to report current data risk audit scrutiny, correction of distribution mismatches, and compliance penalties.
• Multinational groups missing CGDMTR deadlines face significant compliance risk, reputational exposure, and possible interest or fines.

Action plan checklist

Takeaway: These compliance changes aren’t optional. Aligning processes, updating software and preparing documentation now ensures smoother tax lodgment, fewer surprises, and fewer penalties when new rules apply from July 2026.