The Government committed $57.7 million over four years in Budget 2026 to upgrade the Integrated Data Infrastructure. This forms part of the wider fiscal package that projects an earlier return to OBEGALx surplus.
Treasury forecasts show the operating balance before gains and losses excluding significant items returning to surplus in 2028/29. Net core Crown debt is projected to peak at 46.1 percent of GDP in 2027/28.
The IDI aggregates de-identified administrative records from government agencies, NGOs and Stats NZ surveys. It enables longitudinal analysis of policy impacts across sectors.
Stats NZ warned in April 2025 that the platform relies on legacy technology and faces growing instability. The upgrade addresses rising demand and analytical complexity.
What the IDI does — and why it matters
The funding supports the Social Investment Agency's work. It aims to improve targeting of social services such as apprenticeships, health interventions and school attendance programmes.
"The IDI works like a connecting puzzle, piecing together data from Government agencies. It reveals the bigger picture of how policies affect New Zealanders over time — such as whether free apprenticeships help people move into better jobs, or whether health interventions improve school attendance for children." — Minister of Statistics Scott Simpson
Budget 2026 sets a net new operating spending allowance averaging $2.1 billion per year. This figure incorporates $3.8 billion in new initiatives offset by $1.7 billion in savings.
Total government spending in 2026/27 is expected to reach approximately $155 billion. The IDI modernisation sits within Vote Statistics and Vote Social Investment.
A platform with a proven track record
The platform has supported prior research including COVID-19 modelling and equity funding models in education. OECD reports have highlighted New Zealand's linked data approach for child and youth well-being analysis.
"The IDI shows us what is working, and what is not. It makes sure Government decisions are based on facts, not guesswork, and taxpayer dollars are directed where they can make the biggest difference for New Zealanders." — Minister Simpson
Implementation and delivery risks
Implementation will expand access and add analytical tools while maintaining de-identification safeguards. Delivery risks include integration challenges with existing agency systems.
The investment aligns with efforts to direct public funds toward programmes that demonstrate measurable results. It supports the goal of reducing reliance on less rigorous evidence in social policy decisions.
