Charges and billing
Picture of text in a letter

To calculate the cost of supplying services to a potential customer within the Welsh Water supply area, see our published charges for our wholesale services.
The Wholesale Charging Rules require each undertaker considering significant changes to its Primary Charges, to publish information informing stakeholders of the scope of its proposed changes no later than six months before publishing its final charges.

Charging and Billing Documents


Charges and Billing 2020/21

Indicative Wholesale Tariffs 2020/21

Statement of Board Assurance - Indicative Wholesale Tariffs 2020/21

Statement Of Significant Changes - Indicative Wholesale Tariffs 2020/21


Charges and Billing 2019/20

Wholesale Tariff Document 2019/20

Statement of Board assurance - Wholesale Tariff Document 2019/20

Value Added Services - Charging Information for Retailers 2019-20

Indicative Wholesale Tariffs 2019/20

Statement of Board Assurance - Indicative Wholesale Tariffs 2019/20

Wholesale Billing Timetable 2019/20

Charges and Billing 2018/19

Wholesale Tariff Document 2018/19

Wholesale Billing Timetable 2018/19

Indicative Wholesale Tariffs 2018/19

Statement Of Significant Changes 2018/19 

Charges and Billing 2017/18

Wholesale Tariff Document 2017/18

Wholesale Billing Timetable 2017/18