The market moved first
In the space of four weeks, all five major New Zealand banks have raised fixed mortgage rates. ANZ pushed its one-year special to 4.69%. Westpac matched at 4.69%. BNZ landed at 4.59%. Kiwibank went to 4.65%. ASB is holding the most competitive 18-month rate at 4.75%, but the direction is uniform.
The OCR sits at 3.50%. The Reserve Bank hasn’t signalled a hike. This isn’t the central bank tightening monetary policy. This is the banking system repricing credit on its own terms, because wholesale funding costs have shifted and inflation data killed the last hope of further cuts any time soon.
Wholesale rates forced the hand
Every bank offered the same explanation. The two-year swap rate climbed from about 2.85% at the start of April to above 3%. Westpac’s manager of product, Sarah Hearn, said wholesale rates had increased significantly in recent weeks, directly lifting funding costs. ANZ managing director of personal banking, Grant Knuckey, confirmed wholesale rates had continued rising across all terms since March.
But Infometrics chief forecaster Gareth Kiernan offered a sharper read. He told RNZ that wholesale rates had not moved dramatically, and banks had probably been holding off hoping markets would fall, then moved when they didn’t. In other words, lenders were betting on cheaper money and lost the bet.
Then came the inflation data. Headline CPI held at 3.1% in the March quarter, with non-tradables inflation stuck at 3.5%, both above the RBNZ’s target midpoint. Whatever room existed for patience evaporated.
Kiwibank raised rates while its economists called rate hikes reckless
The sharpest illustration of the bind sits inside one institution. Kiwibank economists Jarrod Kerr and Alexandra Turcu warned that RBNZ-induced rate hikes could trigger another recession, arguing this is a supply-side shock, not a demand problem.
“Raising interest rates risks a repeat of past mistakes, potentially inducing a recession. It could be reckless,” they wrote.
Days later, Kiwibank raised rates across one- to five-year terms by 6 to 20 basis points. The bank’s economics team can argue all it wants. The treasury desk still has to fund the book.
Businesses were already cutting before this
The rate moves land on an economy that was already pulling back. NZIER’s March QSBO shows only a net 1% of firms expect better general economic conditions, down from 39% in December. That is one of the sharpest single-quarter confidence collapses on record.
The operational data is worse. A net 9% of firms cut staff over the quarter, with a further net 5% planning reductions. A net 12% intend to trim building investment and net 9% expect to cut plant and machinery spending. Meanwhile, pricing intentions jumped from net 25 in Q4 to net 43 in Q1, consistent with inflation running closer to 4.5-5% over the year ahead.
RBNZ credit conditions data shows SME business loan demand already negative at -1.5, with credit availability for small businesses at just 7.1, compared to 48.7 for household lending. The funding pipeline for SMEs was already thin. It just got thinner.
The repricing cliff nobody talks about
ANZ’s Knuckey noted that 82% of ANZ home loans are currently on a rate below 5%. That sounds like good news until you think about what happens when those fixed terms expire into a rising rate environment.
The average one-year special was 5.22% in March 2025, down from 7.19% a year earlier. The direction has now reversed. ANZ is forecasting three 25bp OCR hikes in July, September and October, taking the rate to 3.0%. Infometrics projects the OCR reaching 4.0% by mid-2027 and 4.5% by early 2028.
For business owners with property-secured lending, every basis point on the mortgage rate is a direct hit to operating costs. Firms that borrowed heavily during the 2020-2021 low-rate era assuming rates would normalise to 2-3% have already absorbed one brutal repricing cycle. A second one doesn’t just compound the pain, it changes the viability calculus for marginal businesses entirely.
What happens when the RBNZ catches up
The banks have already delivered what amounts to a de facto tightening. The question now is whether the Reserve Bank formalises it. If ANZ’s forecast of three hikes by October proves correct, retail rates will climb further and the businesses already shedding staff and slashing capex will face a funding environment that punishes investment at exactly the moment the economy needs it. Kiwibank’s economists may be right that hiking into a supply shock is reckless. But the market has already made the call for them.
Sources
- RNZ: Country’s biggest bank raises interest rates (2025-04-15)
- NZ Herald: Kiwibank latest to hike mortgage rates from today (2025-04-24)
- NZ Herald: BNZ, Kiwibank mortgage rate hikes – how new fixed home loan deals compare (2025-04-24)
- RNZ: Kiwibank joins other banks with home loan rate rises (2025-04-24)
- MPA: ANZ lifts key fixed mortgage rates (2025-04-15)
- MPA: NZ inflation stuck at 3.1% as oil shock builds (2025-04-22)
- MPA: Business confidence buckles as sticky inflation tests NZ borrowers (2025-04-23)
- RNZ: Kiwibank economists warn against ‘reckless’ rate hikes (2025-04-17)
- B2B News: OCR hikes to 4.5% would crush NZ businesses built on cheap debt (2025-04-22)