RBNZ Monetary Policy & OCR

The Reserve Bank of New Zealand (Te Pūtea Matua) was the first central bank in the world to adopt formal inflation targeting (in 1989). Its primary tool is the Official Cash Rate (OCR).

The Mandate

Following the change in government in late 2023, the RBNZ's mandate reverted to a single focus: keeping inflation between 1% and 3% over the medium term. The previous "dual mandate" which included supporting maximum sustainable employment was legislatively removed to prioritize price stability.

The Transmission Mechanism

Unlike the United States where 30-year fixed mortgages insulate existing homeowners from rate hikes, New Zealand's monetary policy transmission is exceptionally fast and brutal.

• Over 80% of New Zealand mortgages are on fixed terms of 3 years or less.
• A vast majority roll over every 1 to 2 years.
• Therefore, when the RBNZ hikes the OCR, the resulting increase in retail mortgage rates drains disposable income from the household sector within 12-24 months, rapidly crushing consumer spending.

Milestone	OCR Level	Impact Context
Pre-COVID (2019)	1.00%	Accommodative baseline.
Pandemic Emergency (2020)	0.25%	Spurred a ~40% housing boom via cheap credit and LSAP (QE).
Peak Inflation Fight (2023-2024)	5.50%	Aggressive tightening cycle to crush non-tradable inflation.