Westpac’s NZ interest margin grows, Aussie margin shrinks

Social media platforms are dragging the chain on fraud protection, says Westpac CEO Catherine McGrath. (Image: NZME)

Mon, 05 May 2025

Westpac’s New Zealand arm achieved a slight increase in its net interest margin – a key measure of both profitability and market competitiveness – in the six months to March 31, while the same measure shrank for its much larger Australian operation.Westpac NZ’s net interest margin (NIM) was 2.26% in the latest half, a further increase of 2.23% achieved in the six months to Sept 30 last year and the previous six months’ 2.1% margin.Growing portfolioHowever, for the whole Westpac group, NIM in the first half of the c...

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