Ofwat will publish the results of the initial assessment of company business plans on 31 January 2019.
Companies categorised as exceptional or fast track can expect to receive draft determinations in early April.
Companies categorised as slow track or significant scrutiny will need to resubmit business plans to Ofwat on 1 April and can expect to receive draft determinations mid-July.
All companies can expect to receive final determinations mid-December.
Further detail on the timetable and process will be published alongside the results of the initial assessment of business plans on 31 January.