Farmers are questioning the local-body priorities and fiscal discipline as rate-takes continue to outstrip cost indexes, Federated Farmers' Katie Milne says.
The local government spokeswoman says analysis by Federated Farmers shows the consumers' price index (CPI) went up 21per cent from 2006-16.
Councils have argued the Local Authority Cost Index prepared by consultants BERL is a fairer measure of cost pressures they face, and that went up 33per cent in the past decade.
Both measures are dwarfed by the average 77per cent hike in rates by 13 city, 54 district and 11 regional councils. New Zealand's population rose by 12per cent in the same period, but Local Government NZ had no figures on how much the rating base grew as a result.
"The ongoing trend of rates to rapidly out-pace inflation is greatly resented by farmers, for whom council bills can be a significant component of their farm costs," Ms Milne said.