National Non-Domestic Rates (NNDR or Commercial Rates) is a charge levied on commercial properties and collected by the Local Authority since 1990.
Tâl yw Trethi Annomestig Cenedlaethol (TAC neu Drethi Masnachol) a godir ar eiddo masnachol ac a gesglir gan yr Awdurdod Lleol ers 1990.