The merger control regime

From 1 January 2026, the merger control regime is mandatory. Learn aboutwhy the ACCC assesses mergers and acquisitions and our role.

The ACCC is unable to provide legal advice about specific circumstances. We can provide general information and guidance.

Businesses proposing to acquire shares or assets that meet the thresholds must notify the ACCC.

Businesses may consider requesting a notification waiver, for suitable acquisitions. If granted, this removes the obligation to notify.

We encourage businesses to contact the ACCC to engage with us on a confidential basis before notifying an acquisition.

When an acquisition meets the threshold, businesses need to notify and pay the relevant fee.Businesses must wait for approval before proceeding.

The ACCC assesses whether the notified acquisition would be likely to substantially lessen competition.

Guidance and publications

Download key documents that provide further detail and guidance about the merger control regime. Access the relevant forms with guidance to help answer the questions required by the forms. 

See guidance on using the acquisitions portal to notify acquisitions, manage notified matters and more.

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