Ers cyhoeddi'r Cynllun yn 2012, mae Llywodraeth Cymru wedi buddsoddi £9bn o gyllid cyfalaf mewn seilwaith yng Nghymru ac wedi datblygu mentrau cyllid arloesol newydd, gan gynnwys y Model Buddsoddi Cydfuddiannol, er mwyn ategu cyllid cyfalaf confensiynol.
Since the publication of the WIIP in 2012, the Welsh Government has invested £9bn of capital funding in infrastructure in Wales and developed new innovative finance initiatives, including the new Mutual Investment Model, to complement conventional capital funding.