National tightens spending pledge ahead of Treasury PREFU
National has released an 11-page economic plan promising no new taxes, a return to surplus in 2028/29 and core Crown spending below 30 percent of GDP. RNZ The party released it on 28 September, the day before Treasury's pre-election update on the economy and the Government's books, known as PREFU.
The below-30-percent promise tightens National's earlier fiscal anchor, which was to bring spending down towards 30 percent. The anchor is a cap on day-to-day government spending measured against the size of the economy, like the Government's share of national income. Labour has set its medium-term cap at 33 percent of GDP. Neither party has set a firm date to reach its target.
Treasury will release PREFU on 29 September 2026. In the May Budget, Treasury forecast core Crown spending at 32.6 percent of GDP in both 2025/26 and 2026/27. That baseline sits more than two points above a below-30-percent ratio. No date is attached to reaching the lower level.
Treasury's Budget Economic and Fiscal Update 2026 forecast inflation of 5.4 percent by the September 2026 quarter and unemployment peaking at 5.8 percent. In its Fortnightly Economic Update on 18 September 2026, Treasury reported the economy grew 0.2 percent in the second quarter. In its 3 September update, it reported the Reserve Bank tightened monetary policy to move towards more neutral settings.
The plan also includes compulsory KiwiSaver, changes to paid parental leave, and lower weekly student loan repayments. National's newsroom dated its 'National's Economic Plan backs Kiwis to get ahead' item 28 Sep 2026 and lists Nicola Willis in connection with the announcement. National The party said the plan aims to ensure hardworking New Zealanders can keep more of what they earn.
The broader context here is the fiscal credibility test that PREFU imposes in an MMP election. Spending as a share of GDP works as shorthand for the size of the state and how much tightening is needed. A below-30-percent pledge points to a smaller day-to-day footprint than Labour's 33-percent cap, but without a path or a date the pace of change is open. The usual questions apply. Which baselines move, what counts as temporary rather than structural, and how sensitive the 2028/29 surplus path is to PREFU revisions on tax revenue, finance costs and the output gap — the gap between actual and potential output.
Looking at what this means for the campaign, the timing matters. Releasing the anchor before PREFU lets National lead debate on spending discipline and tax policy, while Treasury still gets the last word before voting. If PREFU changes the Budget track for growth, inflation or unemployment, both parties will need to show how their caps absorb the change. The KiwiSaver, parental leave and student loan policies widen that task. They are not only about who gets what. They carry fiscal, labour supply and household cashflow effects that close scrutiny around PREFU will test.
