Customers who use in excess of 100,000m3 of water per annum, and who have implemented water efficient practices can apply for the large user tariff.

The large user tariff is similar to the standard metered rate in that it is made up of a standing charge and a volumetric charge.

The standing charges are the same as those that apply to the measured tariffs, but the volumetric charge is discounted for usage in bands of consumption above 100,000m3 per annum. The charges provide a discounted volumetric rate for various bands of consumption.

Eligibility will depend, not only upon consumption but also upon the commitment of the customer to water efficiency. This may include, but is not restricted to, the installation of water saving devices, recycling plants and a review of water efficiency by independent industry experts.

The Large User bands and discounted rates are as follows:

Consumption band	Discount	Volumetric rate
Annual consumption  up to 100,000m3	None	£1.362
Annual consumption over 100,000 and up to 250,000m3	20%	£1.090
Annual consumption over 250,000 and up to 500,000m3	25%	£1.022
Annual consumption  over 500,000m3	30%	£0.953

A customer on the large user tariff will pay the standard volumetric rate for the first 100,000 m3 consumption each year. The 20% discount rate will be applied to further consumption up to 250,000 m3. The higher rates will apply to further consumption above 250,000 m3 and 500,000m3 respectively.

For full information on non-domestic water charges please read our Scheme of Charges 2024/25.