What is it?
Inflation is the rate at which prices rise across the economy over time. When inflation is running at 3 percent, it means that on average things cost 3 percent more than they did a year ago. When it runs at 7 percent — as it did in New Zealand in 2022 — your money is losing purchasing power fast.
Inflation is not just a number on a government report. It is the reason your groceries cost more than they did last year, why your rent has gone up, why building a house costs more than it did five years ago, and why your wages feel like they are falling behind even when they are technically rising.
Understanding inflation explains why the Reserve Bank raises interest rates, why governments talk about the cost of living, and why what is happening in the Middle East right now affects the price of your weekly shop.
What causes inflation?
Inflation does not have a single cause. It is usually the result of several forces working at the same time.
Demand-pull inflation When people and businesses are spending freely — borrowing is cheap, employment is high, confidence is strong — demand for goods and services rises. If supply cannot keep up, prices rise. This is demand-pull inflation. New Zealand experienced this after Covid-19, when government stimulus, low interest rates, and pent-up consumer demand pushed spending well above what the economy could comfortably supply.
Cost-push inflation When the cost of producing things rises — fuel, materials, labour, shipping — businesses pass those costs on through higher prices. This is cost-push inflation. The 2026 Middle East conflict is a classic cost-push event. Oil prices surged, which raised the cost of fuel, transport, freight, and manufacturing across the entire economy. Those costs flow through to the price of almost everything.
Imported inflation New Zealand imports a large proportion of what it consumes. When global prices rise — oil, food commodities, manufactured goods — or when the New Zealand dollar weakens against the currencies we buy in, the cost of those imports rises and feeds directly into domestic prices. New Zealand is particularly exposed to this because of its size and geographic isolation.
Expectations Inflation can become self-reinforcing. When workers and businesses expect prices to keep rising, workers demand higher wages and businesses raise prices to protect margins. Those wage and price rises then cause the very inflation that was expected. Keeping inflation expectations anchored close to the target is one of the main reasons the Reserve Bank takes the inflation target seriously.
How is inflation measured?
New Zealand's official measure of inflation is the Consumers Price Index — the CPI. Statistics New Zealand tracks the prices of around 100,000 goods and services across the economy, grouped into categories including food, housing, transport, health, and clothing. The CPI measures how much that basket of goods and services changes in price from one quarter to the next and from one year to the next.
The Reserve Bank targets annual CPI inflation of between 1 and 3 percent, with a focus on keeping it near the 2 percent midpoint. Below 1 percent risks deflation — falling prices — which sounds good but discourages spending and investment in damaging ways. Above 3 percent means prices are rising faster than most wages, eroding living standards.
Annual inflation in New Zealand was 3.1 percent in the December 2025 quarter — already slightly above the top of the target band — before the 2026 fuel crisis pushed it higher. The Reserve Bank now forecasts inflation rising to around 4.2 percent by the June 2026 quarter, driven primarily by fuel prices flowing through into transport, food, and other costs across the economy.
Why do some prices rise faster than others?
Not all inflation is the same and not all prices move together.
Economists distinguish between tradable and non-tradable inflation.
Tradable inflation covers goods and services that are imported or compete with international products — fuel, electronics, clothing, cars. These prices are heavily influenced by global markets and the exchange rate.
Non-tradable inflation covers goods and services that do not face foreign competition — rent, rates, local services, construction. These prices are driven by domestic supply and demand conditions and tend to be stickier and slower to come back down.
In recent years New Zealand's non-tradable inflation — particularly housing costs, electricity, and council rates — has been the persistent driver of above-target CPI. Electricity prices rose 12.2 percent in the year to December 2025, the highest increase since 1989. Council rates rose 8.8 percent. These are structural pressures that fuel prices are now sitting on top of.
How does inflation affect everyday New Zealanders?
The impact of inflation is not evenly shared. It hurts some people far more than others.
Those on fixed incomes — superannuitants, people on benefits, workers whose wages are not keeping pace — see their purchasing power eroded directly. Every dollar buys less.
Renters feel inflation particularly sharply when housing costs are rising. Unlike mortgage holders who have fixed-rate loans locked in, renters face rising costs immediately as landlords adjust rents to cover their own rising costs.
Mortgage holders on floating or short-term fixed rates feel the knock-on effects of the Reserve Bank's response to inflation — higher interest rates mean higher mortgage payments.
Businesses feel inflation through higher operating costs — fuel, wages, materials, freight. Some can pass those costs on to customers. Others absorb them through lower margins or reduce investment and hiring as a result.
What does the government and Reserve Bank do about it?
The Reserve Bank of New Zealand's primary tool for managing inflation is the Official Cash Rate — the OCR. When inflation rises above target the Reserve Bank raises the OCR, which flows through to higher lending rates across the economy. Higher mortgage rates and business borrowing costs reduce spending and investment, which cools demand and brings prices back down.
Between 2021 and 2023 the Reserve Bank raised the OCR from 0.25 percent to 5.5 percent — the fastest and largest rate-hiking cycle in the bank's history — to bring inflation back from a peak of 7.3 percent in mid-2022. It worked. By September 2024 inflation had fallen to 2.2 percent and the Reserve Bank began cutting rates.
The 2026 fuel crisis has changed the picture again. The Reserve Bank held the OCR at 2.25 percent in April 2026, pausing its easing cycle as it assessed the inflationary impact of the Middle East conflict. The bank warned it stands ready to raise rates decisively if core inflation and wage growth begin to accelerate beyond the near-term fuel shock.
The government's direct tools for managing inflation are more limited. It can reduce spending to cool demand. It can adjust taxes that affect prices. In 2026 it has focused on targeted household support rather than cutting fuel taxes — on the basis that reducing prices during a supply shortage encourages consumption at exactly the wrong time.
What about the current situation in 2026?
New Zealand entered 2026 with inflation already at 3.1 percent — slightly outside the Reserve Bank's target band. The Middle East conflict then drove fuel prices sharply higher, and those fuel costs are now flowing through into transport, food, airfares, freight, and a wide range of business operating costs.
The Reserve Bank forecasts inflation peaking at around 4.2 percent in the June 2026 quarter. How high it actually goes and how long it stays elevated depends almost entirely on how long the Middle East conflict continues and how quickly global oil supply stabilises.
This is a cost-push inflation event on top of an economy that had not fully resolved its domestic non-tradable inflation problem. The two pressures are compounding each other.
Q&A — Common questions and misconceptions
"Inflation means everything gets more expensive." Not quite. Inflation means the average price level is rising — but individual prices move differently. Some things get more expensive faster. Some stay flat. Some even fall. The CPI is a weighted average across hundreds of items, which means your personal experience of inflation depends heavily on how you spend your money.
"The government is profiting from inflation." In a narrow sense the government collects more GST when prices rise — because GST is 15 percent of a higher price. But inflation also increases the government's own costs — public sector wages, welfare payments indexed to inflation, infrastructure costs. High inflation is generally bad for government finances as well as for households.
"Wage rises cause inflation." They can contribute to it — particularly if wages rise faster than productivity, meaning businesses produce the same amount but pay more for the labour that produces it. But wages are also a response to inflation, not just a cause. The relationship is complicated and the Reserve Bank watches wage growth carefully as one signal of whether inflation is becoming entrenched.
"Lower interest rates will fix the cost of living." Lower interest rates reduce mortgage costs and business borrowing costs, which helps some people. But if inflation is still running high, lower rates can make it worse — they encourage more spending and borrowing which adds to demand. The Reserve Bank has to balance the cost to borrowers of high rates against the broader damage of persistent inflation.
"New Zealand's inflation is just a local problem." New Zealand's inflation is a mix of domestic and global factors. The domestic factors — housing costs, council rates, electricity — are local. But fuel, imported goods, global shipping costs, and commodity prices are driven by international forces that New Zealand cannot control. Right now the dominant driver of near-term inflation is a global oil shock caused by a conflict on the other side of the world.
Appears in
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Sources
Statistics New Zealand — Annual Inflation at 3.1 percent in December 2025
Reserve Bank of New Zealand — OCR on Hold at 2.25%, April 2026
Reserve Bank of New Zealand — Inflation and the Official Cash Rate
Reserve Bank of New Zealand — Prices Series M1