The Ecology premium is an economic measurement that has a strong environmental impact. Its policy framework however was insufficiently founded on measurable economic and ecological operational objectives. Simulations by the Flemish Government sometimes proved too confined to be able to accurately estimate the budgetary needs of the premium. Partly due to the economic context this lead to a large number of fluctuations en adaptations of the legal framework. These adaptations diminished the chances for the applying companies of actual premium payment and as a consequence undermined the predictability of the regulating ecology premium framework. The Court of Audit has conducted a survey of a number of companies in order to be able to evaluate the stimulating effect of the premium. An outcome evaluation of the premium hasn’t yet been conducted.