Mae'r mwyafrif helaeth o dalwyr ardrethi'n talu'r hyn sy'n ddyledus yn llawn ac yn brydlon - dyrnaid yn unig sy'n osgoi talu eu cyfran deg. Mae osgoi talu ardrethi annomestig yn cael effaith andwyol ar wasanaethau lleol, y gymuned ehangach a thalwyr ardrethi eraill. Yn ôl y dystiolaeth mae rhwng £10m a £20m o refeniw ardrethi annomestig yn cael ei golli bob blwyddyn o ganlyniad i osgoi talu ardrethi annomestig - sef refeniw a allai wneud cyfraniad gwerthfawr at wasanaethau cyhoeddus. Mae rhai dulliau osgoi'n soffistigedig iawn eu natur.
The overwhelming majority of ratepayers pay what is owed in full and on time – only a small minority avoid paying their fair share. Avoidance of non-domestic rates is to the detriment of local services, the wider community and other ratepayers. Evidence suggested between £10m and £20m of non-domestic rates revenue is lost every year as a result of avoidance – this is revenue, which could be making a valuable contribution to public services. Some methods of avoidance are very sophisticated in nature.