Current merger processes
There are currently 2 ways business can seek the ACCC’s view on a proposed acquisition between now and 30 June 2025. Read our transition guidance, which explains changes to merger processes in 2025.
Businesses can use the informal process to seek our view on whether a proposed acquisition is likely to substantially lessen competition.
Merger authorisation is a formal process. With authorisation, businesses can go ahead with their merger without the risk of legal action to stop the proposal due to competition concerns.
Merger control in Australia is changing
It's not compulsory under the current system for businesses to notify the ACCC of their merger or acquisition.
A new mandatory merger control regime starts on 1 January 2026. Businesses contemplating acquisitions which meet certain thresholds will be required to notify the ACCC and wait for approval before their proposed acquisition can proceed.
A voluntary period and other changes will come into effect from 1 July 2025.
Stay informed about these changes. Subscribe to merger reform updates or view a list of new or updated key merger information.
A new mandatory merger control regime comes into effect from 1 January 2026. The new regime is designed to strengthen Australia’s merger control and provide more certainty and transparency.
The draft merger assessment guidelines are now open for feedback by 17 April 2025. Later in March, we will release the draft merger process guidelines for consultation.
See frequently asked questions about the merger control regime and other detailed information for legal and business advisers
Read our transition guidance if you have a proposed acquisition in 2025, or your merger has been reviewed but not yet put into effect.