New costs, such as for enforcement, are emerging which will continue to grow as tax collection develops and uses new areas of the legislation to debt collect.
Mae costau newydd, fel costau gorfodi, yn dod i’r amlwg a byddant yn parhau i dyfu wrth i’r broses o gasglu trethi ddatblygu a defnyddio meysydd deddfwriaethol newydd i gasglu dyledion.