In the context of the transition from a linear economy to a circular model, it is important to improve approaches to intersectoral planning of economic activity in the context of sustainable development. In this regard, the aim of the study is to improve existing approaches to intersectoral planning of the circular economy based on foreign experience and domestic practice to calculate the degree of transition to a circular economy. The following research methods were used: analysis of approaches to intersectoral planning, development of indicators in solid municipal waste management, modeling, etc. As a result, based on the dual reflection of line and circular economy accounting registers, a modified methodological approach to intersectoral planning is proposed. A calculation model containing complex indicators for the corresponding funds in the context of "linear economy" and "circular economy" is proposed. The results of the study and the proposed methodological approach can be adapted to assess the development potential of the circular economy, economic planning, forecasting, and the development of appropriate programs to stimulate the development of closed-cycle economic sectors.