ANZ's economists have laid out the structural tension facing New Zealand mortgage borrowers: short-term rates are cheaper, but longer terms offer certainty in an environment where the Reserve Bank is expected to raise the OCR three times before the end of the year.
New Zealand mortgage borrowers are facing a structural tension in the current rate environment that ANZ's economists have described in frank terms: short-term rates are cheaper, but choosing them means accepting the possibility of rolling onto a higher rate when the term expires.
The bank's economists laid out the quandary in their latest ANZ Property Focus report. Wholesale interest rates — which feed directly into the mortgage rates that banks set — are under pressure from multiple directions. Inflation fears are persisting, the US Federal Reserve is pricing a higher-for-longer path, and bond investors in major economies are demanding more yield to hold government debt that carries fiscal sustainability concerns.
What is driving wholesale rate expectations
The report notes that wholesale rates have continued to rise in anticipation of OCR hikes, as inflation remains above the RBNZ's target and global rate expectations shift upward. The US 30-year Treasury yield recently touched its highest level since 2007. Germany's and the UK's long-term rates are at multi-decade highs. These international moves feed into the pricing that New Zealand banks face when they raise funds in wholesale markets.
ANZ is forecasting three OCR hikes of 25 basis points each, starting in July. The RBNZ has kept the OCR on hold through 2025 and into early 2026, but the inflation data has not been consistent with a sustainable return to the 1-3 percent target band. The combination of persistent services inflation and a tight labour market has led markets and bank economists to price in a higher OCR path than was expected even a few months ago.
The "sweet spot" that comes with a caveat
Based on its own OCR and wholesale rate forecasts, ANZ says the one-to-two-year part of the mortgage curve is the "sweet spot" purely from a cost perspective. That means locking in for one or two years should, on average, be cheaper over that period than fixing for longer. But the bank is not presenting that as a clean recommendation.
The economists are clear that uncertainty is high. "Any forecasts should be taken with a grain of salt at this juncture," they note. The concern is that if inflation stays elevated and the RBNZ moves more aggressively than currently priced, the rates available at refixing could be materially higher than the current forecast path implies.
The practical implication for borrowers is a trade-off between cost and certainty. A shorter-term fix costs less now but transfers the risk of future rate increases to the borrower. A longer-term fix costs more now but removes the uncertainty about what the rate will be when the term expires.
What this means for the mortgage market
ANZ is New Zealand's biggest home lender with total exposure of more than $115 billion as of December last year, making its views a significant signal in the market. The bank is not telling borrowers what to do — it is describing the structural conditions that exist and the trade-off that follows from them.
The underlying story is that global rate pressures are not neutral for New Zealand. When bond markets in major economies sell off and long-term yields rise, the cost of the funding that New Zealand banks use also rises. That tends to put upward pressure on mortgage rates across all terms, not just the ones that the RBNZ directly controls. The gap between where fixed rates are now and where they might be in 12 or 24 months is the central uncertainty that every borrower with a refixing decision ahead of them needs to weigh.
This article is for general information only and is not personalised financial advice. Seek advice from a licensed financial adviser (registered on the FSPR) for guidance specific to your situation.