This study examined replacing cement with hypo sludge, a waste product from paper mills, at levels of 5%, 10%, and 15% in concrete mixes designed to M20 grade. Testing of compressive strength on concrete cubes found that strength increased up to 10% replacement but decreased with 15% replacement. A cost analysis also found that replacing cement with hypo sludge up to 10% reduced the cost of the concrete by up to 5.75% while maintaining strength. The aim of the study was to develop an eco-friendly and cost-efficient concrete utilizing an industrial waste product.