The aim of the present study is to develop eco-friendly, low cost and light weight plastic based composite material using eggshells (bio-waste) ash as filler material. The study describes the development of carbonized eggshells loaded hybrid glass-jute fibre reinforced (GJFR) polyester bio-composites and reports the effect of fillers loading on its wear behaviour and mechanical properties. Carbonized eggshell ash powder as a filler, glass and jute fibre rovings as hybridized fibre and unsaturated polyester resin as a matrix material were used for the development of novel FRP composites using the pultrusion process. Eggshells ash powder was used in different weight (wt) % as 3.5 wt%, 6.5 wt%, 9.5 wt%, 12.5 wt%, and 15.5 wt%. A pin-on-disc tribometer was employed to analyse the wear behaviour. Two variable load conditions as 30 N and 50 N were selected to wear test runs while sliding speed, sliding distance, and track diameter as 3 m/s, 1500 m, and 60 mm respectively were kept constant. The developed hybrid composites with 9.5 wt% and 3.5 wt% carbonized eggshells filler involvement showed maximum and minimum tensile strength as 75 MPa and 62 MPa respectively. The composites with 12.5 wt% and 3.5 wt% eggshells fillers showed maximum and minimum compressive strength as 99 MPa and 49 MPa respectively. The maximum wear resistance was exhibited by composites with 9.5 wt% filler loading and at 50 N applied load conditions. The carbonized eggshell fillers inclusion in a limited amount was recommended to strengthen the wear resistance of the GJFR polyester composites in combination with tensile and compressive strengths. A scanning electron microscope study was conducted to notice the wearing procedure and tensile and compressive fracture of the GJFRP composites.