Estimate Adders are added costs on top of the Subtotal Repair Cost Estimate for Location, Estimating Contingency, Contractors Overhead & Profit, Labor & Material Taxes. Estimate Adders can be set up on the Repair Estimator on the Adders Tab: Related ArticlesWhat is the Contingency Adder?What is the Contractors Overhead & Profit Adder?What is the Labor Tax adder?What is the Material Tax adder?8 Tips for Learning How To Estimate Rehab Costs