Have a look at what constitutes as an FIF company to get a clearer idea of what you add up. When I talked to IRD companies that are not FIF classed aren't included in the total but if you go over the NZD$50,000.00 of FIF companies ALL your overseas shares are added to the mix. Great system huh!
Plenty of info here about it but the IRD website does have a good explanation about it.