Moldova lacks a fiscal rule as this concept is usually understood in other countries. Many governments have adopted numerical fiscal rules; for example, in the European Union, they are called “financial rules”. The Financial Regulation is the main point of reference for the principles and procedures governing the establishment and implementation of the EU budget and the control of the European Communities’ finances. The Moldavian budgetary rules are only in the incipient stage, but we try to follow good foreign practices. That subject of research is very actual for our country, especially in the current situation of the country, when the credibility for the state is very low from the side of population, and it also refers to managing public resources. In that paper work, I try to define budgetary rules of the Republic of Moldova, to see the conformity to that rules by the responsible authorities and try to forecast the budgetary expenditure for 2016-2017 using ARIMA model.