Microbial screening studies have shown that the strain Proteobacterium ARJR SMBS has a potential to degrade perchlorate. This microbe was isolated and the growth inhibitory kinetic studies were carried out on this strain ARJR SMBS over a perchlorate concentration range of 0 - 50 mg/L. Increasing perchlorate concentration affected the specific growth rate and degradation efficiency of the strain. Results show that 95.3% of perchlorate reduction was achieved with 9 h of incubation at an initial perchlorate concentration of 10 mg/L; whereas only 60.4% degraded at 50 mg/L perchlorate concentration. Dry weight of cells and colony forming unit analysis proved that there is growth retardation effect on this strain with respect to varying initial perchlorate concentration. Present data shows that specific growth rate of strain ARJR SMBS is highly dependent and inversely proportional to the perchlorate concentration. The study proves that the higher concentration of perchlorate exhibit mild toxicity effect toward this microbial community in the environment. A kinetic model was developed to predict the specific growth rate, cell density and perchlorate degradation rate based on the experimental data.