VWASS2700 | Supplies of water: exception to the mixed use - the ‘predominant activity’ test
From HM Revenue & Customs · VAT Water and Sewerage Services
There is one exception to this general approach outlined in VWASS2600.
Where:
a relevant industrial customer has two or more business activities; and
one of those activities is non-industrial and exempt for UK VAT purposes; and
that exempt activity is not the predominant activity; and
the water supplied to the exempt business activity is separately identified and separately invoiced;
the water so invoiced may be treated as separately supplied and zero-rated.
This avoids putting a customer with separate non-industrial, VAT-exempt, activities and industrial activities at a disadvantage, compared to a customer who has only non-industrial exempt activities.