I used to lose money on almost every fixed-price project. Not because I was slow. Because I was vague. My estimates were based on what clients told me they wanted, not what the project actually required. This changed when I built a proper estimate template. Here is the structure. Section 1: What is included (be specific to the point of being annoying) Do not write "build user authentication." Write "build email/password login, password reset flow, email verification, session management with 30-day expiry, and rate limiting on login attempts." Every word you do not write is a future argument about scope. Section 2: What is explicitly not included This is the section most freelancers skip and they regret it. List things the client might reasonably assume are included but are not. "Social login (Google/Facebook) is not included in this scope." "Mobile responsiveness is included for screen widths above 375px.…