Is the rate-cutting cycle turning a page? Banks move before the Reserve Bank: the important signals in Westpac’s rate rises

As six-month fixed mortgage rates fall, why are banks quietly raising their three-year and five-year fixed rates?

Yesterday, Westpac announced its latest mortgage rate changes: its six-month fixed rate fell by 0.2 percentage points, while medium- and long-term fixed rates from 18 months to five years rose across the board. This combination of ‘short rates down, long rates up’ was modest in scale, but attracted considerable attention in financial markets.

In interest rate markets, the term structure often reveals more than any single rate. A bank’s willingness to lock in funding costs over a longer period often reflects its assessment of future inflation, monetary policy and risks. Many market participants see Westpac’s move as a clear signal that the medium- to long-term interest rate environment is being repriced.

 

Inflation back above 3%: a small number, but a sensitive change in direction

 

The timing of Westpac’s rate adjustment was no coincidence.

Just a week earlier, Stats NZ released figures showing that the consumer price index (CPI) rose 0.6% quarter on quarter in the December quarter of 2025. This pushed annual inflation back up to 3.1%, once again above the upper limit of the Reserve Bank of New Zealand’s 1% to 3% target range.

Stats NZ senior manager Nicola Growden said the price increases were ‘very broad-based’, with prices rising for more than four-fifths of CPI items over the past year. She noted that electricity, council rates and rents remained the main drivers of annual inflation, while international airfares, fuel and telecommunications services contributed significantly to the quarterly increase.

Looking at its composition, inflation has not spiralled out of control across the board. Several measures of underlying inflation remain around 2.5%. For markets, however, the greater concern is not whether inflation is ‘too high’, but whether its downward trend is slowing or even stalling.

Responding to the figures, Finance Minister Nicola Willis described the rebound as a ‘blip’. She stressed that the Reserve Bank of New Zealand distinguishes temporary factors from structural trends when setting monetary policy and would not rush to change the interest rate path on the strength of a single quarter’s data. Her remarks did not entirely dispel market concerns.

 

The Reserve Bank of New Zealand: no rush to brake, but a foot off the accelerator

 

On the policy front, the Reserve Bank of New Zealand is currently holding the Official Cash Rate (OCR) unchanged. Its official statements emphasise that more time is needed to assess whether inflation will continue falling. This ‘wait-and-see’ stance can easily be misread as a continuation of easing.

Several economists point out, however, that this does not mean the direction of policy is unchanged.

In her latest research, ANZ chief economist Sharon Zollner noted that recent inflation and economic activity figures had been ‘running hot’, prompting ANZ to bring forward its forecast for the first rate rise from early 2027 to December 2026. She believes the Reserve Bank of New Zealand may not act immediately, but its policy focus is shifting from ‘stimulating the economy’ to ‘preventing renewed overheating’.

Brad Olsen, chief executive of economic consultancy Infometrics, offered a more flexible assessment. He said Infometrics’ baseline scenario still had rate rises beginning in November this year. But if inflation and growth figures continue to exceed expectations over the coming months, the Reserve Bank of New Zealand could face pressure to discuss acting earlier as soon as May.

By contrast, Kiwibank economists still believe a rate rise this year is unnecessary. The disagreement itself reflects a reality: the Reserve Bank of New Zealand’s forward guidance is becoming less clearly one-directional.

 

Banks and markets are already moving ahead

 

Banks and markets have moved first, before the Reserve Bank has changed course.

Explaining the changes, Westpac New Zealand’s head of product, sustainability and marketing, Sarah Hearn, said plainly that the key driver of higher medium- and long-term mortgage rates was the continuing rise in wholesale funding costs. She noted that two-year wholesale rates had risen by more than 0.5 percentage points since November last year. Although the bank had absorbed some of those costs, it could not fully absorb them over longer terms.

Financial markets reacted just as quickly. Following the inflation release, New Zealand shares came under broad pressure, with property and utilities stocks particularly weak. Government bond yields rose at the same time, with the 10-year yield reaching around 4.6%. Through the interest rate transmission process, these changes directly increased banks’ medium- and long-term funding costs.

Several market analysts noted that markets were not pricing in an ‘already settled path of rate rises’, but hedging in advance against a risk that had yet to materialise but had become markedly more likely.

 

Property: changing expectations have been quickly absorbed

 

The property market has quickly absorbed this shift in expectations.

In its latest housing report, ANZ noted that national house prices in New Zealand had been broadly flat for three consecutive years, with stock levels remaining high and properties taking longer to sell. In light of changing interest rate expectations and political uncertainty, ANZ cut its forecast for house price growth in 2026 from 5% to 2%.

Zollner and her team believe that, as interest rates shift from a ‘tailwind’ for housing to a ‘crosswind or even a slight headwind’, the conditions for a strong rebound in house prices are not yet in place. In the period ahead, market performance will depend more on regional economic fundamentals, the composition of housing supply and buyers’ capacity to manage their cash flow.

Regionally, Auckland and Wellington remain weak, while parts of the South Island are holding up relatively well, supported by employment and population trends. This divergence is gradually becoming a feature of the new cycle.

 

Practical implications for households and borrowers

 

With interest rate expectations highly uncertain, households and borrowers are shifting their strategic priorities.

Several mortgage advisers say the choice between fixed and floating rates is no longer about betting on a single direction, but about managing uncertainty. By splitting their mortgage across fixed terms and keeping a portion floating or using an offset account, households can secure some certainty while retaining flexibility to respond to future changes.

As markets once again discuss the possibility of rate rises, a more practical question is emerging: if interest rates remain relatively high for longer than previously expected, will household cash flow still be secure? At this stage, cash flow resilience is once again becoming more important than expectations of house price growth.

 

Commentary and reflection

 

As markets move ahead, should we also reassess our expectations?

Westpac’s increase in medium- and long-term mortgage rates is less a pessimistic call on the economic outlook than a reminder to markets that interest rate cycles never move in a straight line in one direction.

With inflation back above 3%, economic activity gradually recovering and the Reserve Bank of New Zealand’s policy stance shifting from ‘strong stimulus’ towards ‘a more cautious balance’, banks, bond markets and sharemarkets have already reacted. These changes do not mean rate rises are a certainty, but they clearly show that the consensus that ‘rates can only go lower’ is breaking down.

For households, homebuyers and investors, the real risk may not be whether rates rise at a particular point, but overconfidence about the direction of the cycle and placing too much weight on a single outcome. As uncertainty returns to centre stage, cash flow management, diversification and flexibility in decision-making often matter more than precise forecasts.

Over the coming months, whether inflation continues to cool, whether the economic recovery exceeds expectations, and how the Reserve Bank of New Zealand balances observation with action will all have a crucial influence on the interest rate path. Westpac’s move to adjust longer-term rates first may be the first signal in this round of repricing.

 

How do you view these rate changes? Do you think this is simply a short-term adjustment, or is the interest rate cycle undergoing a deeper shift? Share your views and assessments to keep the discussion going.