The coalition government built its economic brand on "fixing the books" and fiscal discipline — yet it has cut income taxes and handed landlords a multi-billion-dollar tax break while the Crown accounts are still in deficit. That tension, between a restraint message and choices critics call "borrowing for tax cuts," is the heart of this issue.

This page explains a politically charged, contested topic. Figures are from Treasury and Budget documents; the framing reflects competing claims, which are attributed to the people who make them.

What's happening:

• New Zealand's books are still in the red. Budget 2026 forecasts an OBEGALx deficit of $11.4 billion in 2026/27, narrowing to a first surplus of $2.6 billion in 2028/29 — which would be the first surplus in a decade.
• The government's preferred measure, OBEGALx, excludes ACC. On the traditional OBEGAL measure, the books only reach surplus in the final forecast year — a distinction critics say flatters the result.
• Net core Crown debt is forecast to peak at 46.1% of GDP in 2027/28 before easing to about 44.4% by the end of the forecast period.
• Meanwhile the government delivered a $14.7 billion personal income tax package (Budget 2024, over five years to 2027/28), lifting most thresholds by about 11.5%, and restored full mortgage-interest deductibility for landlords at a four-year cost of $2.9 billion — $800 million more than National's pre-election costing of $2.1 billion.
• To help the numbers add up, Budget 2026 added new revenue, including a bank/prudential levy worth $209 million over four years and tighter spending allowances.

Where the parties stand:

• Finance Minister Nicola Willis (National) frames the path as discipline paying off, saying New Zealand is "digging its way out of the post-Covid hole" within an "affordable and responsible" envelope. National argues tax relief returns money to workers and that restoring deductibility removes a distortion. See National's income tax relief for workers.
• Labour's finance spokesperson Barbara Edmonds calls it "a budget of broken promises", arguing Willis borrowed billions while cutting taxes — she contrasts "$2.9 billion for landlords" with little for low-income workers, and says future generations will pay.
• NZ First campaigned on inflation-indexed tax relief and a stronger IRD; it backs the coalition's restraint framing while pushing its own revenue ideas.
• This issue sits at the centre of the wider cost-of-living debate: supporters say tax relief eases household budgets, while opponents say borrowing-funded cuts add to debt servicing.

Independent voices are mixed. Infometrics chief executive Brad Olsen called it a "little b Budget" and judged Treasury's optimism not necessarily misplaced, noting only a roughly 50–60% chance the surplus lands. BNZ's Stephen Toplis warned the outlook could be "too rosy," and S&P Global Ratings was reported as underwhelmed, with several economists wanting surplus driven by concrete cuts or tax rises rather than forecast revisions.

What to watch:

• Whether the 2028/29 surplus actually materialises, or slips again as it has in past updates — Treasury itself puts the odds near a coin-flip.
• Whether credit-rating agencies hold New Zealand's rating steady given the debt peak and reliance on forecast upgrades.
• The 2026 election: tax, deductibility and "who borrowed for what" are shaping up as central campaign arguments between National/NZ First and Labour/Greens.
• Second-order effects on the housing market and rents from restored deductibility, and on services from tighter operating allowances.