From the SNA to a SAM-based Model, through an application to Portugal, systematizes a methodology for using the European System of National and Regional Accounts in the European Community of 1995 to construct numerical and algebraic versions of a Social Accounting Matrix that are in complete harmony with this. From both versions, scenarios are defined and analysed, arising from experiments that have been carried out into the (macro-)impacts of government policies regarding income distribution.Close attention is paid to the corresponding response of the different macroeconomic aggregates, balances and indicators.