NTA Inflation Bulletin

The inflation bulletin intends to provide insights to Sponsoring Agencies, and Consultants working on behalf of the Sponsoring Agencies, to inform their estimation of costs for projects where the NTA is the Approving Authority.

The bulletin will be updated annually, or earlier if the macroeconomic conditions continue to be unstable.

The latest version of the bulletin was published in February 2024, replacing the May 2023 bulletin and October 2023 supplementary note.  It should be used to provide guidance to Sponsoring Agencies on the treatment of future inflation from February 2024 onwards.

The bulletin and related material can be accessed within the Cost Management Guidelines (updated 2024) here.