It states the scope was larger than initially thought, and the extra $100,000 included an independent review, audit and additional communication.
Council received around 3500 submissions on the issue, despite residents not receiving consultation documents in the original mail out, leading to consultation being extended by a week.
There were also three days of hearings for those who wanted to speak on their submissions.
An 'in principal' decision to sell up to 49 per cent of the port was made at a meeting in December, with Councillors Debbie Hewitt and Paul Bailey voting against the decision.
The initial offering will be between 33 per cent and 45 per cent.
The port expenditure is just one of the items looked at in the paper, which looks at the forecasts of HBRC's expenditure for the financial year ending June 30, 2019, based on the nine months to March 31.
Overall, there is no expected change to the financial forecast, with unfavorable variances, such as the port consultation, being offset by favourable variances.