Different Welsh rates can be applied to each tax band but the National Assembly for Wales does not have powers to vary the income thresholds the rates apply to.
Gellir pennu cyfraddau Cymreig gwahanol ar gyfer pob band trethi ond nid oes gan Gynulliad Cenedlaethol Cymru bwerau i amrywio’r trothwyon incwm y mae'r cyfraddau'n gymwys iddynt.