Nutrient availability in soils is a critical factor for plant growth and agricultural productivity. Among the various soil microorganisms, Bacillus spp. have emerged as key contributors to improving nutrient solubilization, particularly for essential nutrients like phosphorus, potassium, and nitrogen. These bacteria possess unique metabolic pathways that enable them to release nutrients from insoluble forms, making them more accessible to plants. This mini article reviews the mechanisms employed by Bacillus species, including the production of organic acids, enzymes, and biofilms, that enhance nutrient solubilization. It also explores the synergistic interactions between Bacillus spp. and plants, as well as their role in promoting sustainable agricultural practices. By understanding these processes, the use of Bacillus spp. could be optimized to enhance soil fertility, reduce dependence on chemical fertilizers, and contribute to more sustainable farming systems.