The work to be carried out for the preparation of this statistical operation varies according to two types of units, those subject to a limited budget and public accounting, and those subject to the General Plan of Accounting of Enterprise (private). In the first group, the allocation of the expenditure of these units to the different COFOG groups starts from the elaboration of the expenditure operations according to the methodology established in the SEC, starting from the economic classification of the expenditure budget. The functional and programme structure of the budget indicates the purposes and objectives to be achieved with the budgetary resources allocated to the expenditure management centres. The expenditure programmes of the Budget Settlements are analysed individually in order to ascertain their purpose, for allocation to the relevant COFOG group.
In the case of units subject to the General Business Accounting Plan, the functional classification is carried out according to its main activity, defined in its statutes and reports. However, in those units that carry out several clearly differentiated activities (for example, in the case of public companies that promote public infrastructures in both education and transport), the allocation of expenditure to different COFOG groups is made according to the information contained in the reports.
Finally, the unit of counterpart of expenditure in interest transactions, current transfers and capital transfers is analyzed, so that in sector S.13 each transaction is the sum of the data of each subsector, except for the aforementioned operations that are consolidated between subsectors.