As Winston Peters wants to move Ports of Auckland to Northland, the business has just declared a drop in profit partly blamed on spending on its current site.
Rising operating expenses, including investments for the future, depressed the port's annual bottom line profit by $23.5 million - from $83.8m to $60.3m - but the Auckland Council-owned non-listed business said its results were still "in line with expectations".
Revenue rose from $211m to $222m, but operating expenses offset gains, spiralling from $103m to $119m although the business said last year's profit had been inflated by a $17.6m gain from an asset impairment reversal.
The result for the June 30 year "includes the cost of investments made in sustainability, a review of our business model, cyber security, innovation and automation", the port said.
The council's dividend fell from $54.3m last year to $51.3m this year although port chairwoman Liz Coutts said this "equates to 4.1 per cent of the average residential rates bill, a significant contribution the city can use for future investment while keeping rates down".