Sefydlwyd Awdurdod Cyllid Cymru ym mis Hydref 2017 i gasglu a rheoli dwy dreth ddatganoledig yng Nghymru ar ôl cyflwyno Deddf Casglu a Rheoli Trethi (Cymru) 2016.
The Welsh Revenue Authority was established in October 2017 to collect and manage two devolved Welsh taxes following the introduction of the Tax and Collection and Management (Wales) Act 2016.