AUD/NZD Soars to 13-Year High Amid Interest Rate Gap

The exchange rate between the Australian and New Zealand dollar, AUD/NZD, has seen significant fluctuations in recent months. In late September 2026, the rate reached its highest level in around 13 years, with one Australian dollar buying approximately 1.25 New Zealand dollars.

The main driver behind this trend is the difference between interest rates set by the Reserve Bank of Australia (RBA) and the Reserve Bank of New Zealand (RBNZ). The RBA raised its cash rate three times in the first half of 2026, taking it to 4.35 percent, while the RBNZ held its official cash rate at 2.25 percent before increasing it to 2.75 percent in September.

This gap between interest rates has drawn demand for Australian dollars, contributing to the rise of AUD/NZD from around 1.21 in March to its peak near 1.25 in September. The pair also responds to commodity prices, with iron ore and dairy prices playing a significant role. When iron ore demand is strong, the Australian dollar tends to benefit, while rising global dairy auction prices can lift the New Zealand dollar.

The AUD/NZD rate matters for rural economies built on wool, fat lambs, cattle, and grain exports. A stronger Australian dollar against the Kiwi makes New Zealand product relatively cheaper for overseas buyers, affecting local producers and exporters. For example, Meat & Livestock Australia notes that the exchange rate has largely eliminated the premium previously enjoyed by New Zealand lamb in China.