Auckland Council's water company says it will start bringing in "much fairer" waste-water charges for 22,000 businesses from July next year.
Watercare Services inherited 44 different charging methods from the former local network operators and local councils when it took them over in 2010.
Yesterday, the board announced a new standard tariff for the region - a mix of annual fixed charges with a volumetric charge based on fresh water intake - to be phased inover three years.
Watercare board chairman Ross Keenan said the new pricing structure would not generate additional revenue.
The aim of a standard user-pays tariff was to remove anomalies where some businesses were paying more or less depending on their location.