Westpac expects the Reserve Bank of New Zealand (RBNZ) to raise the Official Cash Rate (OCR) by 25 basis points to 2.75% at its Monetary Policy Statement on 2 September, describing the move as a straightforward decision likely to be reached by consensus within the Monetary Policy Committee. The announcement is due at 0200 GMT / 2200 US Eastern time. The September MPS is one of the RBNZ's four scheduled statements each year that pair a rate decision with updated economic projections, making it a key focal point for both rates and currency markets.

Forecast track seen largely unchanged

Chief economist Kelly Eckhold said the RBNZ's projections are likely to continue implying a 3% OCR by year end, matching the May MPS, with the rate track beyond 2026 also expected to stay close to the May profile, which had the OCR peaking at around 3.3%. The projected peak matters well beyond New Zealand: the OCR path feeds directly into fixed mortgage rates for households and funding costs for businesses, shaping how quickly the central bank's tightening transmits into the wider economy.

The key point of interest for the release will be how the RBNZ signals the likelihood of a further hike in October. Westpac expects the central bank to be equivocal, favouring a data dependent approach, given the OCR will be close to the 3% neutral rate level the RBNZ frequently references — the rate at which policy is considered neither stimulating nor restraining the economy — and given the substantial volume of data due for release across September and October.

Roughly symmetric risks around the base case

Westpac's central call is for a consensus 25bp hike with little new signal, which should limit the scope for a sharp market reaction unless the RBNZ's language on October diverges from the data dependent framing Westpac expects.

The bank sees only modest, roughly symmetric risks around that base case:

• Hawkish scenario (10–15% probability): The RBNZ signals firm resolve to keep hiking in October and beyond, potentially through a higher or upgraded neutral rate assumption or explicit guidance that an October increase is more likely than not. Under that scenario, markets could conclude the OCR reaches 3.25% by year end via back-to-back hikes in both October and December.
• Dovish scenario (10–15% probability): The RBNZ suggests it can take time to assess the inflation outlook after 50 basis points of hikes, potentially raising doubts about a December move and suggesting a pause through December.

Market focus on forecasts rather than the hike itself

For the New Zealand dollar, the more market-moving elements are likely to be the forecast track rather than the hike itself, since the OCR path is already priced consistently with a 3% year-end level. Westpac also flags that the NZD trade-weighted index (TWI) — the RBNZ's preferred currency measure, which weights the kiwi against the currencies of New Zealand's main trading partners — is already running above the RBNZ's own May assumption, a modest tightening in financial conditions the central bank may reference.

Eckhold: further hikes likely required through 2027

Eckhold's own assessment is that the strategy of returning the OCR to around 3% by year end is clear and uncontroversial, though it remains unclear whether further increases will be needed at every remaining 2026 meeting given the fragile state of the recovery and the still embryonic improvement in the labour market.

Nonetheless, he remains sceptical that inflationary supply shocks will dissipate quickly or sustainably, and expects that core inflation running too high will likely require further rate increases through 2027 once the economy is sustainably operating above trend and the labour market recovers — making a data dependent approach the appropriate stance for now. That view positions Westpac somewhat more hawkish than the passive, purely data dependent read the RBNZ itself is expected to communicate.

Backdrop largely consistent with RBNZ's May forecasts

Since the May MPS, activity data have come in broadly close to the RBNZ's forecasts:

• GDP and labour market data have matched expectations, with the labour market staying soft and unemployment at 5.6%, slightly above the RBNZ's 5.4% forecast.
• Headline inflation eased to 4.1% for the year to June, against a 4.2% forecast, though it remains above the RBNZ's 1–3% target band, which underpins the case for keeping policy tight.
• Inflation expectations across households, businesses and professional forecasters have declined back toward levels seen before the recent oil price spike.

Domestic financial conditions have tightened somewhat since May, with one- and two-year fixed mortgage rates up around 35 basis points, and the NZD TWI running above the level assumed in the RBNZ's May projections — both factors that may feed into the central bank's updated assessment of financial conditions at the September meeting.

Earlier coverage

• Preview – Path of least resistance: ASB expects consensus RBNZ hike this week
• Reserve Bank of New Zealand Shadow Board split, most back 25bp rate hike this week
• Preview: Inflation and growth strength point to further RBNZ tightening, BNZ says
• 90% of economists expect RBNZ hike on September 2, poll shows