Monitoring and focus reports
The Commission produces quarterly monitoring reports, which monitor the performance of engine fuel markets in New Zealand under the Fuel Industry Act 2020.
Fuel price monitoring – Middle East conflict
The Commission is publishing regular fuel price monitoring reports in response to the conflict in the Middle East and the impact on global fuel prices.
4 June 2026: Last week we made some changes to our weekly fuel price monitoring as the conflict in the Middle East continues to impact global fuel prices. We added a new metric to track how pump prices in New Zealand move with underlying fuel costs. This price-cost spread is the difference between the average retail price per litre motorists pay and the daily spot refined product cost per litre that retailers pay. We added the price-cost spread because we consider it a more useful way to compare today’s market conditions with previous years.
Our latest analysis shows that retail petrol prices have remained relatively stable over the last week, while diesel prices have seen a slight decline. 14-day rolling average refined costs have fallen more than retail prices for both fuel grades, although daily diesel costs have seen increased volatility over the last week. The average daily price-cost spreads for each fuel type since the conflict began are now within the ranges observed from the same period in recent years.
Quarterly monitoring reports
These reports are based on the Commission’s analysis of the information disclosures (ID) provided by fuel companies each quarter, and provide snapshots of the competitive performance of engine fuel markets in New Zealand.
The Fuel Quarterly Monitoring Reports have been available since November 2022. In that time, the Commission has built the foundation of a solid data base that continues to grow.
Older reports
Reports older than the previous calendar year.
Focus reports
In addition to the quarterly reporting, the Commission occasionally publishes focus reports that supplement the analysis of quarterly information disclosure data.