Abstract Plastics are used in almost many sectors today. Thermoplastic-based composites with various properties such as flame retardancy are frequently preferred in many industries, but flame retardant composite materials pose a potential danger to the environment due to both the synthetic origin of the plastic matrix and flame retardant derivated from petroleum sources. In recent years, the use of more sustainable and green matrices and additives have gained importance in order to minimize the environmental hazards. In order to achieve this goal, studies have been conducted on the development of composite materials using recycled polymers to increase sustainability by minimizing the hazards caused by synthetic polymers in both academia and industry. The aim of this project is to investigate how the ratio of the flame retardant additive with renewable resources (FR-RS) affects the properties of recycled Polyamide 6 (PA6) composites. 15 wt.%, 17.5 wt.%, and 22 wt.% FR-RS added recycled PA6 composites were produced by using a twin screw extruder. Test samples required for characterization were obtained by using injection molding technique. Density, tensile test, Izod and Charpy impact tests according to ISO standards and flammability tests according to UL94 standards were performed. When the characterization results were examined, it was seen that when both mechanical properties and flammability results were considered, 17.5 wt% FR-RS was selected as the most suitable ratio. Keywords: composite, green, recycled polyamide, renewable resources, flame retardant