The budget classification is important for policy formulation and the allocation of resource across sectors. Classification is also necessary to establish responsibility for compliance with policies and performance, and for daily budget management.

The most well-known classification systems are the "Government Function Classification (COFOG)" developed by the United Nations and the classification of Government Financial Statistics (GFS), developed by the IMF.

The budget classification system applied in the Republic of Moldova was approved in 2015, corresponds to the UN and IMF systems, and includes:

Functional Classification, for background analysis and policy formulation;

Organisational classification, for accountability;

Fund classification, for the sources of funding;

Economic classification, for the control of line-items expenditures;

Programmes classification, for policy formulation and performance accountability.