The article presents changes in the total annual emission of limited toxic compounds released into the atmosphere together with exhaust gases from farming machinery used in Poland between 2011 and 2013. The calculations were based on the amounts of the excise tax refund for ‘farming’ fuel, which were expended from the budget during the years under study. The methodology of calculations presented by the authors in the previous publication was also used in this study. It was based on emission limits included in Directive 97/68/EC and on exceeding of these limits during the operation of farming machinery under typical field conditions, which was presented by Lindgren. The fuel consumed by the whole population of farming machinery (including tractors, mobile and stationary machinery with diesel engines) has the greatest influence on the total emission of toxic compounds. This dependence was particularly noticeable when 2012 and 2013 were compared. In 2012 the lowest consumption of farming fuel was noted, i.e. 601.7 million tonnes. It resulted in the lowest total emission of toxic compounds, i.e. 88,188 tonnes. In 2013 the emission of toxic compounds was greater by 6.7% than in the previous year and reached 94,137 tonnes. It was caused by the highest fuel consumption during the years under study, i.e. 646.9 million tonnes.