By Tom Furley for RNZ
The Police Association says it's costing tens of thousands of dollars a day for the large-scale police response at Ihumātao.
More than 100 police have been at the standoff with protesters since they removed occupiers off the land on Tuesday.
Police are unable to indicate costs yet and won't say how many staff have been involved.
"The number of staff present at any given time can vary with staff being regularly rotated on a shift basis, but the general police presence has remained around the same since the Tuesday," a spokesperson said.