Mae ‘Law yn Llaw at Iechyd’ hefyd wedi'n hymrwymo i sefydlu trefn ariannol newydd i wella'r gwaith o gynllunio a defnyddio adnoddau ariannol yn unol â blaenoriaethau clinigol.   Yn ganolog i hyn mae cychwyn ar drefn ariannol fwy hyblyg, wedi'i ategu gan ddyletswydd ariannol gyfreithiol ar Fyrddau Iechyd Lleol i fantoli'r gyllideb dros gyfnod treigl o 3 blynedd yn hytrach na bob blwyddyn. Er mwyn cefnogi hyn, aethom ati ar frys i gyflwyno deddfwriaeth newydd drwy Fil Cyllid y GIG (Cymru) a gymeradwywyd gan y Cynulliad Cenedlaethol ar 3 Rhagfyr. Disgwylir Cydsyniad Brenhinol ddiwedd mis Ionawr 2014.
‘Together for Health’ also committed us to put in place a new financial regime to improve the planning and utilisation of financial resources in line with clinical priorities.   Central to delivering this is a move to a more flexible financial regime underpinned by a legal financial duty for Local Health Boards to break even over a rolling 3 financial years as opposed to annually. To support this we moved quickly to introduce new legislation through theNHS Wales (Finance) Billwhich was passed by the National Assembly on 3 December with Royal Assent expected in late January 2014.