Prif ddiben y Gyllideb Atodol hon yw alinio strwythurau cyllidebol 2016-17 â’r newidiadau ym mhortffolios a chyfrifoldebau’r Gweinidogion a gyhoeddwyd gan Lywodraeth Cymru ym mis Mehefin, a dangos y newidiadau cyllidebol ers Cyllideb Derfynol 2016-17 a gyhoeddwyd gan Lywodraeth Cymru ym mis Mawrth.
The main purpose of this Supplementary Budget is to align the 2016-17 budget structures with the changes to the Ministerial portfolios and responsibilities announced by the First Minister in May and to reflect the budgetary changes since the Final Budget 2016-17 published by the Welsh Government in March.