The country's front door — NZ$280m underlying, at 90%.

We lock a binary: Auckland International Airport's reported underlying profit after tax for FY2027 is NZ$280m or higher. Confidence 90%.

Guidance is NZ$290-330m. Our threshold sits NZ$10m below the floor of that range and NZ$29m below what the company actually delivered in FY2026.

Auckland Airport is as close to a structurally protected asset as the NZX offers. It is the country's dominant international gateway, its passenger volumes move slowly, and its FY2027 guidance is built on modest growth to roughly 8.3m domestic and 10.8m international passengers rather than on a recovery that has to materialise.

But the FY2026 result is the cautionary detail, and it is why this sits at 0.90 rather than 0.93. Underlying profit went backwards, if only by 0.5%, and management attributed that specifically to geopolitical instability and fuel price spikes in the second half. Those inputs hit airlines first and airport aeronautical revenue second, through capacity decisions that airlines make on months of notice. Management has explicitly carried both caveats into the FY2027 guide and taken what it describes as a cautious approach to near-term capacity assumptions.

There is a third factor the guidance range does not fully contain, which is regulation. Auckland Airport's aeronautical pricing sits under Commerce Commission scrutiny, and the FY2027 period also carries NZ$1.0-1.3bn of capital expenditure on the infrastructure programme. A capital programme of that scale interacts with both the regulatory return question and the depreciation and interest lines beneath underlying profit.

The scoring line names underlying profit after tax, which excludes fair-value changes and one-off items. That distinction matters more than usual for an airport: revaluations on a property and infrastructure base this large can swing reported statutory profit by more than the entire width of the guidance range.