When you say "go agile", what do you mean? Why does the client care how the project is delivered? If the client wants to pay a fixed bid then bake that added r

When you say "go agile", what do you mean? Why does the client care how the project is delivered? If the client wants to pay a fixed bid then bake that added risk into your estimate. For clients - if they're asking for something new/unique, what they have in their minds at the beginning is just a theory and needs to be tested -- working in iterations and focusing on "how do we help you prove your hypothesis in the most time/cost effective manner". Agile is about incremental, demonstrable progress to provide clarity and reduce risk.