The warning shot came twice
When one credit rating agency flags concerns about your fiscal trajectory, it is a caution. When two do it in quick succession, it is a pattern that markets price in.
Fitch moved first on March 20, lowering New Zealand’s outlook to negative while maintaining the AA+ rating. Moody’s followed days later, affirming the AAA rating but shifting the outlook to negative, citing geopolitical uncertainty and persistent inflation pressures including fuel prices, housing costs and electricity.
A negative outlook is not a downgrade. It is a formal signal that a downgrade is under active consideration. New Zealand now sits one deterioration away from losing its top-tier ratings on both scales.
The agencies said the quiet part out loud
Fitch’s language was unusually pointed for a rating agency. It noted that “a substantial debt reduction is becoming more difficult to envisage, as fiscal consolidation has been delayed in the past few years”. It forecast general government debt rising to 56% of GDP by FY June 2027, compared to 36.1% forecast just five years earlier. A near-20-percentage-point blowout in half a decade.
Perhaps the most damaging observation was this: “This follows repeated delays in the target year since December 2022 under successive governments”. Not just this government. Not just the last one. Both. Labour and National alike have promised a return to surplus and then moved the goalposts. The agencies have now formally documented the habit.
Fitch also flagged the political calendar directly, noting that “significant fiscal consolidation measures are likely to occur only after the 2026 election”. Translation: nobody believes the current government will do what is needed before voters go back to the polls.
The numbers behind the scepticism
Treasury’s own Budget Economic and Fiscal Update 2025 makes the agencies’ case for them. The OBEGALx operating deficit is forecast at $10.2 billion in 2024/25 and $12.1 billion in 2025/26. The return to surplus, now pencilled in for 2028/29, would deliver a surplus of just $0.2 billion, down from $1.9 billion forecast at the Half Year Update. Net core Crown debt is expected to peak at 46.0% of GDP in 2027/28.
Core Crown tax revenue is $13.3 billion lower across the forecast period than projected at the Half Year Update, driven by slower nominal GDP growth and declining business profits. The December HYEFU showed the deficit for the year to June 2025 at $13.9 billion, $1.8 billion worse than forecast in May, and pushed the surplus target back a full year.
An oil shock the books haven’t absorbed
The fiscal picture was already deteriorating before the Iran conflict sent energy prices spiralling. The disruption triggered what the IEA described as “the largest supply disruption in the history of the global oil market”. New Zealand is acutely exposed: diesel prices have risen 140% since the war began, and the country sources 80% of its refined oil imports from South Korea and Singapore.
Finance Minister Nicola Willis acknowledged the problem, conceding that Treasury’s preliminary forecasts “will now need to be revised” following Middle East volatility. That razor-thin $0.2 billion surplus is at serious risk of disappearing entirely.
Businesses are already paying the price
Sovereign credit concerns do not stay in Treasury spreadsheets. The two-year swap rate, the benchmark banks use to price lending, jumped from 2.95% on February 27 to 3.67% following the Iran conflict. That 72-basis-point move flows directly into business borrowing costs, working capital facilities and term debt.
RBNZ Governor Anna Breman pushed back on market panic, holding the OCR at 2.25% and calling the market pricing unrealistic. But the swap rate move has already happened. Businesses refinancing debt or drawing down credit facilities are paying more regardless of what the OCR does.
A full sovereign downgrade from either agency would push costs higher still. Government borrowing costs cascade into infrastructure funding, bank funding margins, and ultimately every business loan in the country.
Willis’s defence has a credibility gap
Willis has framed the negative outlook as vindication of fiscal conservatism, citing $43 billion in savings across two Budgets and a $2.4 billion new spending cap. The argument is that borrowing more, as the opposition proposes, would make things worse.
She is not wrong that discipline matters. But the agencies are not impressed by the current trajectory either. Fitch acknowledged New Zealand’s strengths as an “advanced and wealthy economy” with “high governance standards”, then issued the negative outlook anyway. Core Crown expenses are forecast to fall from 32.9% of GDP in 2025/26 to 30.9% by 2028/29, a real reduction but one that is slow, back-loaded, and dependent on economic recovery that may not materialise.
The uncomfortable truth is structural. New Zealand governments of both stripes have consistently overestimated revenue, underestimated the persistence of spending, and pushed the surplus target out another year rather than making harder decisions. The rating agencies have now put that observation on the record. The question heading into 2026 is whether any government is willing to do what none has managed since 2022.
Sources
- Moody’s downgrades New Zealand’s financial outlook to negative – NZ Herald (2026-03-25)
- Treasury Report: Budget Economic and Fiscal Update 2025 – Final Fiscal Forecasts (2025-09)
- Government books bleaker as surplus gets further away, deficits grow – RNZ (2024-12)
- Oil Shock and Stagflation Risk: New Zealand’s Macroeconomic Exposure to the Iran War – Principal Economics (2026)
- Fitch warning on debt puts pressure on Nicola Willis, RBNZ Governor pushes back on market panic – NZ Herald (2026-03)
- New Zealand’s Interest Rates on Hold: Inflation vs Economic Recovery (2026)