Scottish Water says household water and waste water charges will rise by 4.2% for the next financial year, in line with CPI inflation as of October 2021.
The public company has also warned that prices are likely to increase further in future years.
Scottish Water chief executive Douglas Millican said: “Higher levels of investment are needed to protect services now and over the long term, particularly in meeting the challenges of more intense rainfall, flooding, and drought, and reducing carbon emissions.”
Water charges are collected by local authorities along with council tax.