Treasury Launches Consolidated Assurance Process
The Treasury published the Investment Decision Assurance Policy on 13 October 2026. It replaces separate Gateway and Infrastructure Priorities Programme processes. The change responds to Cabinet decisions in April 2026 on the Investment Management System.
Agencies will face a single set of six-point reviews for high-risk investments. Points 1 to 3 occur before Cabinet decisions. Points 4 to 6 follow approval. Targeted Investment Reviews address specific concerns.
Fiscal Discipline Focus
The policy prioritises value for money and fiscal implications. It reduces duplication that previously cost agencies time and money. Earlier Go/No go decisions at Point 1 will limit spending on misaligned projects.
Treasury estimates past Gateway reviews covered projects worth $45 billion. The new system aims to improve outcomes on similar high-risk capital investments.
Role Transfer to Te Waihanga
From 1 November 2026 Te Waihanga coordinates infrastructure assurance. Treasury retains responsibility for digital, equipment and organisational change investments. The split leverages Te Waihanga's infrastructure expertise.
Key Historical Metrics
Gateway reviews ran from 2008. Over 180 reviews were completed by 2016 across more than 80 projects. Each review cost agencies $75,000. Annual system cost reached about $2 million for 25 to 30 reviews.
The Infrastructure Priorities Programme received nearly 150 proposals and endorsed 47 before pausing for the new framework.
Compliance and Review
Compliance focuses on whether findings reach Ministers and inform decisions. The policy applies to departments and specified Crown entities under Cabinet Office circular CO (23) 9.
The document schedules a review in 2027. That review will check audience clarity, assurance independence and Cabinet alignment.
Broader IMS Reforms
The IDA sits inside wider Investment Management System changes. It supports the National Infrastructure Plan goals on strategic alignment and deliverability. Agencies must prepare business cases with stronger assurance inputs.
High-risk investments identified through Risk Profile Assessment trigger mandatory reviews. The Treasury will issue two-page Fitness Assessments for major cases covering value for money and agency performance.
The changes maintain agency accountabilities while providing Ministers clearer information. Supporting workbooks and reviewer guidance will roll out progressively.
