Ar ôl ymgynghori â Thrysorlys Cymru, cyflwynodd Gweinidogion Trysorlys EM Orchymyn Seneddol ar 23 Gorffennaf i gychwyn darpariaethau Deddf Cymru 2014 sy'n ymwneud â gweithredu cyfraddau treth incwm Cymru.Mae Gorchymyn 2018 Rhif 892 o dan Ddeddf Cymru 2014 wedi'i basio a'i gyhoeddi heddiw.
Welsh Treasury officials are continuing to work with HMRC on the detailed arrangements for the implementation of Welsh rates of income tax to ensure a smooth transition for Welsh taxpayers and businesses.  Every income taxpayer living in Wales will receive a letter from HMRC notifying them of the changes and I will make further announcements on the preparations this autumn.