Chorus' profit fell 24 per cent as the telecommunications network operator slowed the number of customers switching to different providers or technologies in an increasingly competitive market.
The telecommunications lines company said its net profit came to $85m for the June year, down from $113m in the previous year.
At an operating level, the company's EBITDA came to $653m, up slightly from $652m a year earlier, and modestly higher than its guidance of $625m to $650m.
Chief executive Kate McKenzie said demand for fibre was "stronger than ever" and that there were now more than 900,000 homes and businesses with Chorus fibre available at their door.
Chorus completed a record 156,000 fibre installations, which helped grow its fibre uptake from 35 per cent to 45 per cent.