Charities and some specific non-profit making organisations are entitled to 80% 'Mandatory Relief' from rates on any non-domestic property which is wholly or mainly used for charitable purposes.
Mae gan elusennau a rhai sefydliadau dielw penodol yr hawl i dderbyn 'Rhyddhad Gorfodol' o 80% rhag ardrethi ar unrhyw eiddo annomestig a ddefnyddir yn gyfan gwbl neu'n bennaf at ddibenion elusennol.