INCS stands for incremental net costs. Synonyms of the term include supplementary expenses, additional costs, and net hike. These words all indicate an increase in expenses beyond the original cost. Another synonym for INCS is incremental operating costs, which is the amount of money needed to cover the costs of operating a business or project that is above the base costs. Other synonyms for the term include added expenses, raised costs, incremental expenditures, and net upsurge. Regardless of which synonyms you choose to use, they all convey the same meaning of a rise in expenses above the original amount.