Relevance. At present, the assessment of the stress-strain state of tanks located on permafrost soils is an important task to prevent accidents and spills of oil and petroleum products, which may entail serious environmental consequences. This paper discusses in detail the effect of various loads, including ground settlement resulting from thawing of permafrost soil. The reason for the increase in the ground thawing zone is the growth in the average annual air temperature, which is becoming an increasingly urgent problem in the context of global climate change.  Aim. To analyze the effect of bedding coefficients of the base under the tank and the amount of subsidence on the stress-strain state of a vertical steel tank. Methods. The authors have developed a simplified model of the tank. With the help of the model the authors obtained the dependences of the stress-strain state on such important parameters as hydrostatic pressure of the product, the boundaries of non-sagging and subsidence soil in the tank base, as well as the values of the bedding coefficients of the soil in compression. This model made it possible to determine the most significant factors in the calculation that affect the stress-strain state of the tank during settlement. In the future, the obtained results of the study will allow carrying out refined calculations of stress-strain state of the tank elements, which will be critical in assessing the stability of the structure during settlement of the base, as well as ensuring the efficiency of tank operation. Results. The dependences of equivalent stresses in the tank wall and in the tank bottom at different ratio of bedding coefficient of thawed and frozen soil, as well as on the size of the thawing zone were obtained. The stresses in the tank wall are more dependent on the height of the product filling – the weight of the parameter is 77%, but the difference in bedding coefficients of the soils also has a significant effect of 18%. The stresses in the tank bottom are already more affected by the variation of soil bed coefficients (50%) than by the hydrostatic pressure loading (38%).