I can tell when someone is really considering buying real estate on Kauai when they start asking about property taxes. :)
The good news is that compared to almost everywhere Kauai County has a low real estate tax rate. It is a little different however than most places.
Real estate taxes on Kauai is based on a combination of both the county's assessed value of your property and how your property is used.
The 2016 real estate tax code for Kauai county is as follows:
(Per $1,000 Net Assessed Valuation) Tax Rate