We’ve all been there. A project kicks off with excitement, but a few weeks in, you’re fielding a steady stream of "can you just..." requests. That profitable engagement is suddenly feeling like a time-consuming headache, and the client seems to have a completely different memory of your initial conversation. This slow, frustrating expansion of tasks is called scope creep, and it’s a silent killer of firm profitability. Your best defense isn't a difficult conversation; it's a great document. A Scope of Work (SOW) is your project's official rulebook. When you properly define scope of work, you create a single source of truth that protects your time, prevents misunderstandings, and keeps everyone happily on the same page.