The New Zealand Treasury issued the Digital, Equipment and Change Assurance Framework workbook for Investment Decision Assurance Review Point 2 on 30 October 2026. The release sets the operational rules for testing major data, digital, specialist equipment and organisational change proposals before Ministers approve funding.
The workbook guides independent Review Teams assessing Programme Business Cases or Indicative Business Cases under the new Investment Decision Assurance system. It takes effect alongside the full IDA Policy from 1 November 2026.
IDA replaces the Treasury Gateway framework that operated since 2008 and the Infrastructure Commission's Priorities Programme. The change follows April 2026 Cabinet decisions to strengthen investor-focused assurance and improve information for Ministers on high-risk investments.
The framework applies where the Treasury Risk Profile Assessment rates an investment as high risk. Reviews become mandatory for those projects. Medium- and low-risk proposals may opt in.
Key figures under scrutiny
- Budget 2026 committed $5.7 billion in net new capital spending.
- Health New Zealand's 10-year Health Digital Investment Plan totals an estimated $7.4 billion.
- $1.8 billion already approved for programmes including radiology modernisation at $602 million.
- All-of-Government digital procurement has delivered nearly $907 million in cumulative savings since 2017, according to a Public Service Commission briefing to the incoming Minister for Digitising Government.
Health New Zealand's plan provides a clear test case. Multiple business cases within the $7.4 billion programme will now face Point 2 scrutiny on options analysis and justification before progressing to Detailed Business Cases.
The Treasury Assurance Unit leads reviews for data, digital, equipment and change investments. The Infrastructure Commission handles infrastructure under a parallel framework. The Government Digital Delivery Agency supplies specialist input on digital proposals.
From Gateway to IDA
Gateway reviews previously covered projects worth tens of billions, including Inland Revenue's Business Transformation. An Auditor-General analysis of Gateway reviews found recurring problems with planning, options analysis and benefits definition.
Reviews must conclude at least six weeks before key Cabinet decisions.
The new model shifts emphasis to investor needs. It requires early risk identification and delivers concise Fitness Assessments to Ministers.
Process lead time stands at 9-12 weeks. Fees remain at the Gateway level during transition. In-flight Gateway reviews continue until completion by late 2026.
Over the medium term the framework is expected to reduce project failure rates and cost overruns in digital and organisational change programmes. Stronger upfront scrutiny supports the government's target of earlier return to surplus while managing pressures in health, defence and infrastructure.
Chief executives must annually attest compliance with investment management rules under Cabinet Office Circular CO (23) 9. The regime sits inside the Treasury Investment Management System alongside Better Business Cases guidance and Long-Term Investment Plans.
Early implementation will be monitored through a 2027 policy review. The changes aim to deliver better value for taxpayers by ensuring proposals demonstrate robust justification before billions are committed.
