Key rates & policy

What the OCR is and who decides it

An explainer on the Official Cash Rate: what the RBNZ number measures, who at the Reserve Bank of New Zealand sets it, and why the decision meetings matter.

Central banks move economies by moving one number, and in New Zealand that number is the Official Cash Rate. This note explains what the OCR actually is, who sets it, and why a decision made at one of its scheduled meetings shows up in the daily series Younivi republishes from the Reserve Bank of New Zealand.

The OCR is not the rate a household pays and not a bond yield. It is the interest rate the Reserve Bank of New Zealand (RBNZ) pays, and charges, on overnight settlement balances held by banks. Because every bank must settle its end-of-day positions using those balances, the rate on them anchors the shortest rate in the whole financial system. Move the anchor and everything priced off it — deposit rates, floating lending rates, market rates for months and years ahead — tends to move with it.

What the series measures

The series behind the Cash Rate desk is the Reserve Bank's official record of OCR decisions. Younivi's copy identifiers the source as the RBNZ Wholesale interest rates (B2) publication, series INM.DP1.N, and it records decision points: each dated the day the new rate took effect and given as the level set at that decision. The history Younivi republishes contains 78 such decision points. The first entry is 17 March 1999, when the OCR — then a brand-new instrument — was set at 4.50%.

Because the series stores decisions rather than a daily average, it never shows a rate that was "in between" decisions. It is a step function: a level holds until the next change date, then takes a new value. That is why a table of 78 rows can describe a history covering more than a quarter of a century, and why the value "today" on the desk is simply the level set at the most recent decision date.

Who decides it

The decision-maker is the Reserve Bank's Monetary Policy Committee, supported by staff analysis. Under current New Zealand legislation the Committee sets monetary policy to achieve the economic objectives set for the Bank, and the Bank operates under an agreement with the Minister of Finance that specifies how price stability and employment objectives are interpreted. The practical meaning for a reader of the data is that OCR changes are announced in advance: the Bank publishes a decision calendar and the economy-wide statement that accompanies each decision.

Decisions are not made continuously. They happen at scheduled policy meetings, at intervals the Bank fixes in advance and publishes alongside its calendar of Monetary Policy Statements and summaries. The scheduling matters when reading the series. A gap of several months between two rows does not mean the Bank was idle; it means no decision date fell in that period, and the previous level simply persisted.

The years since 2020 illustrate how differently the same instrument can be used. The series records the all-time low of the history: 0.25%, set on 17 March 2020 as the pandemic shock arrived. It then records a long rising phase, followed by cuts starting in August 2024. The last ten changes in the published series read as follows:

One point of housekeeping: the most recent dated observation in the series Younivi republishes is 25 August 2026, at the level set in July — the file records the level as it stands on each date, and the latest republished observation is the current 2.50%. Until the next decision date arrives, that value is both the latest and the current rate.

Why a policy rate guides so much else

The OCR works through the market for short-term funds. Banks that run short of settlement cash borrow from banks with surplus cash at rates clustered around the OCR; the RBNZ can also lend and absorb cash at rates just above and below the OCR, which keeps market rates in line. Once a market rate for "overnight" is pinned, rates for three months, a year, two years onward are set by expectations: traders price the sequence of overnight rates they expect between now and the term's end.

That is why an OCR decision changes, at one stroke, values that never appear in the series itself — floating lending rates, savings rates, swap rates, and other bank offers priced off the policy anchor all move with it, at one stroke. It is also why markets sometimes move on a meeting even when the OCR is unchanged: the statement changes expectations about future decisions, and term rates reprice immediately.

What the series does not tell you

A decision-level series has three honest limits. First, it records decisions only, so it is silent on any fluctuations in between — market rates can drift away from the OCR between meetings. Second, it is a New Zealand instrument; comparisons with overseas policy rates (a Federal Reserve target range, Bank of England Bank Rate) compare what each central bank publishes, and those are not defined identically. Third, it contains no forecasts. The RBNZ's own projections of where the OCR might head live in its Monetary Policy Statements, not in the decision history.

Where this fits in the wider picture

Central bank policy rates are usually technical, but in 2020 and 2021 the near-zero levels set by many central banks, New Zealand's included, became a broad public story. Zero was not merely a low number; it was the visible edge of the instrument, the point at which conventional cuts have almost no room left. It changed the conversation around saving, borrowing and asset prices because the rate that anchors so much else had reached a boundary familiar elsewhere but new to the public argument.

A return to positive-but-low rates is not the same world as the high-rate 2000s. A low positive rate still rewards saving modestly and still penalises borrowing, but far less sharply, so the same policy direction can coexist with very different household behaviour. What matters for a saver or borrower is not the label "low" or "high" but the level relative to inflation and to their own obligations.

This is why one number can guide so much. The OCR anchors overnight funding, and every term rate is built from expectations of it. Saving and borrowing decisions therefore follow not just today's decision but the path the market reads from it, which is why the single number and the words around it carry so much weight.

How to read this on Younivi

The NZ OCR page on the Cash Rate desk shows the latest decision, a chart of the full history, and the source citation naming series INM.DP1.N. The same desk publishes the US Fed funds target and UK Bank Rate, so the three policy rates can be read side by side on each desk's own terms. Companion notes in this series walk through where the OCR has been over its full history and how it connects to mortgage and deposit pricing.