O 1 Ebrill 2018 ymlaen, bydd Cymru’n casglu ei threthi cenedlaethol cyntaf ers bron i 800 mlynedd wrth i dreth dir y dreth stamp a’r dreth dirlenwi gael eu datganoli a’u disodli gan y dreth trafodiadau tir a’r dreth gwarediadau tirlenwi.
From 1 April 2018, Wales will collect its first national taxes for almost 800 years as stamp duty land tax and landfill tax are devolved, to be replaced by land transaction tax and landfill disposals tax.