Key documents

These documents are for business and legal advisers and others interested in the new merger control regime who need detailed information.

This document supplements the merger reform transition information and provides answers to some of the questions we've been asked.

Our guidance on the transition to the new merger control regime is available in document format if you need to download and forward it on.

Subscribe to merger reform updates

A new mandatory merger control regime starts on 1 January 2026, with a voluntary period from 1 July 2025. 

Subscribe to get the latest news and updates on the new merger process and changes during the transition period.

  • Be alerted to key dates and new information.
  • Find out when we’re seeking feedback on guidance.
Subscribe to merger reform update emails

Merger enquiries

Contact the ACCC mergers team if you have an acquisition to discuss or have a question about the new regime.

For questions about a proposed acquisition, email mergers@accc.gov.au.

If you have a question about merger reform or the new merger control regime, email MergerReformInfo@accc.gov.au. We will attempt to respond directly to queries we receive where possible. We may also provide responses in the FAQ document in our Information for business and legal advisers on the merger control regime so the information is available more broadly.