The subject of this thesis is a techno-economic analysis of a gasification plant as a solution for residual industrial plastic waste after separation. Gasification is a thermochemical process used for energy recovery from materials, product of which is synthetic gas. This thesis gives a discription of the gasification process, influence of different parameters on the course of the process and an overview of technical and economic parameters for existing plants for gasification of plastic waste. The techno-economic analysis was carried out for a potential plant which would be constructed for a private company. The private company manufactures granules by recycling industrial plastic waste and there is a need for an according way of disposing the waste not suitable for recycling. Energy recovery by gasification is a possible solution. A review of literature has shown that most of the available waste can be used as fuel in the gasification process (PP, PET, PC, ABS i PE). The reason behind the exclusion of the rest of the available waste is the lack of literature describing the behaviour of this materials during the gasification process and the products of such processes. The parameters for the potential plant have been determined according to averaged values of parameters from existing gasification plants and available literature. Due to the possibility of increasing the capacity from currently available 2 tonnes a day of plastic waste in a short period, it has been determined that the nominal capacity of the gasification plant will be 10 tonnes per day or 3.390 tonnes per year. Necessary calculations have been carried out to determine the amount of produced synthetic gas and the amount of electrical and thermal energy that are produced as a part of the plant from synthetic gas. Electrical and thermal energy are primarily used to cover the energy needs of the plant and the rest is sold at a market price. Economical analysis of the plant showed that an investment wouldn't be profitable. An overview of the influence of the plants daily capacity and the rate of the waste disposal fee on the profitability was given. The sensitivity analysis has shown what effect would changing the daily capacity of the plant, the amount of the investment, the price of electrical and thermal energy, the maintenance and labour cost, the amount of the synthetic gas produced and the value of lower heating value of the synthetic gas have on the profitability of the investment.