Financial aid and subsidies for electricity are intended to mitigate the impact of energy bills on low-income households. Unfortunately, these subsidies can represent a significant financial burden for governments. By eliminating them, states can reduce their budget deficit and reallocate those funds to other priorities, such as education or health. Several methods and alternative solutions to avoid or reduce dependence on electricity subsidies can be considered, but they will need to be adapted to the specific context of each country or region. Promoting energy efficiency will help consumers to reduce their electricity consumption and offset price rises. The integration and investment in renewable energy are essential to diversify energy sources and reduce dependence on fossil fuels. These two actions can effectively reduce the need and dependence on subsidies by decreasing demand. Moreover, by implementing more rational aid programs instead of subsidizing fossil electricity for low-income households, it will be highly possible to encourage states to stabilize their budgets acceptably by reallocating funds to other priorities. This study aims to evaluate the energy and economic performance of the Algerian buildings. This paper quantitatively analyzes the financial and energy efficiency of buildings and, rehabilitation projects of single-family houses in all of Algeria's climatic regions. An assessment of the building's overall energy balance was the basis of the investigation method. According to the obtained results, the current state subsidy system will not have to be fully maintained. Eliminating or reducing electricity subsidies is a complex process that requires a thoughtful and gradual approach. It must be carried out gradually and accompanied by protective measures for vulnerable households. To avoid negative impacts on the purchasing power and well-being of citizens, these measures must be based, firstly, on specific and limited investments and financial aid according to climatic regions, unlike what they were at the beginning (unlimited); secondly, on the judicious integration of renewable energies; and thirdly, on strengthening energy efficiency. From a financial point of view, subsidies are significantly lower for lower cooling energy needs. By adopting rehabilitation measures, unsubsidized energy bills are lower than those corresponding to a conventional home without thermal rehabilitation and with subsidized bills. Subsidizing the thermal rehabilitation procedure, or subsidizing thermal rehabilitation, a suitable solar water heater and, a stand-alone, optimized and well-sized photovoltaic system at the same time, can be a good alternative for effectively reducing the need for and dependence on subsidies by reducing demand or getting rid of these subsidies altogether. The most suitable regions for financial assistance, ranked according to merit, are M'sila, Naâma, Biskra, Bechar and, lastly, the Drabla climatic region.