Yn ogystal â hyn, cyhoeddir cofnod cynhwysfawr o fformiwla pob blwyddyn mewn Llyfr Gwyrdd. Fel rhan o’r ymdrech i wella tryloywder a deall yr agwedd bwysig hon o gyllid llywodraeth leol, mae strwythur y Llyfr Gwyrdd o 2021-22 ymlaen wedi gwella yn sylweddol o ran hygyrchedd a faint o wybodaeth sydd wedi’i chynnwys ynddo. Mae llyfrau gwaith ar wahân sy’n manylu ar y dangosyddion a’r asesiadau seiliedig ar ddangosyddion ynghyd a’r fformwlâu ar gyfer cyfrifo’r asesiadau o wariant safonol ar gyfer prif feysydd darpariaeth gwasanaethau lleol.
In addition to this, a comprehensive record of each year’s formula is published in a Green Book. As part of improving the transparency and understanding of this important aspect of local government funding, the structure of the Green Book from 2021-22 onwards was improved significantly in terms of accessibility and the amount of information contained within it. There are separate workbooks detailing the indicators and services indicator-based assessments together with the formulae for calculating the SSA for the main areas of local service provision.