Index of Commodity Prices September 2025

Preliminary estimates for September indicate that the index increased by 1.9 per cent (on a monthly average basis) in SDR terms, after increasing by 1.2 per cent in August. The rural, non-rural, and base metals subindices increased in the month. In Australian dollar terms, the index increased by 0.7 per cent in September.

Over the past year, the index has been unchanged in SDR terms. Lower thermal coal, coking coal, and liquified natural gas prices have been offset by increases in gold, iron ore, and rural commodity prices. The index has increased by 4.3 per cent in Australian dollar terms.

Consistent with previous releases, preliminary estimates for iron ore, coking coal, thermal coal and LNG export prices are being used for the most recent months, based on market information. Using spot prices for the bulk commodities index, the index increased by 1.6 per cent in September in SDR terms, to be 2.9 per cent higher over the past year.

For further details regarding the construction of the index, please refer to ‘Changes to the RBA Index of Commodity Prices: 2013’ in the March 2013 issue of the Bulletin and ‘Weights for the Index of Commodity Prices’ (April 2025).

Details are in the attached table and graph.