Fel rhan o'r Gyllideb ddrafft, cyhoeddodd yr Ysgrifennydd Cyllid restr fer a oedd yn cynnwys pedwar syniad am drethi newydd – treth ar ddeunydd plastig untro; ardoll i gefnogi gofal cymdeithasol; treth ar dir gwag a threth ar dwristiaeth.
The shortlist has been drawn up following feedback from the public about ideas for a new tax after the Finance Secretary said he would test the Wales Act 2014 powers, which allows Wales to propose new tax ideas in devolved areas.