Cost to serve (CTS) is a business model that calculates the overhead costs required to service each customer based on their activities. It provides an aggregate analysis of each customer's cost profile to determine their true profitability. Companies use CTS to model price leakages and specific costs related to serving customers. Costs are tracked as they are incurred during manufacturing and sales. CTS also uses Pareto analysis to identify the top causes that need addressing to resolve most problems and focus management on high impact risks.