Increased commodity prices, commercial marketing, and convenience have encouraged soybean [Glycine max (L.) Merr.] producers to adopt high-input management systems for maximum grain yield regardless of soil or plant tissue nutrient concentrations, soil physical properties, or disease pressure. A three site-year trial was established in Michigan to investigate soybean grain yield and profitability in response to commonly recommended inputs, including poultry litter (PL), potassium thiosulfate (KTS), foliar micronutrient, and fungicide applications across intensive (i.e., high-input) and traditional (i.e., low-input) management systems. Across all site-years, intensive management did not significantly increase soybean grain yield compared with traditional management. No single input applied significantly increased grain yield as suggested by an absence of visible nutrient deficiencies and minimal foliage disease in either growing season. In addition, traditional management significantly increased producer economic net return by an average of $203/acre. Potassium thiosulfate significantly decreased net return in one of three site-years while PL significantly decreased net return in all three site-years due to a lack of positive yield response and high individual input costs. Data suggest limited potential for intensive management systems to increase soybean grain yield and profitability without the presence of yield-limiting factors (e.g., disease pressure and nutrient deficiencies). Practitioners should consider site-specific soil properties and the likelihood of a grain yield response prior to broad-scale implementation of soil fertility and plant nutrition programs.