This white paper provides a comprehensive view of numerous legacy costs as part of a total cost of ownership (TCO) assessment of a retailer's in-house support of its online channel infrastructure. It explores the potential benefits to TCO that can result from a migration to outsourced, purpose-built online commerce infrastructure models. The document also analyzes research results that show how different retailers at different levels of online selling maturity can be directly impacted by a better understanding of current costs and future benefits. Lastly, it provides specific metrics to use as sample guides when undertaking this evaluation.