The evolution of the tax-base in Wales will have medium to longer-term implications for tax revenue and the money available to spend on public services in Wales.
Bydd i’r gwaith o ddatblygu’r sylfaen drethu yng Nghymru oblygiadau tymor canolig i dymor hwy o ran refeniw treth a’r arian sydd ar gael i’w wario ar wasanaethau cyhoeddus yng Nghymru.