Payment structure is something freelancers and clients do not always agree on from the start, and the preferred method can vary depending on the type of project. Hourly works well when the scope is unclear, but some clients feel uncomfortable not knowing the final cost. Flat fees are clean and simple but can hurt you if the project grows beyond what was agreed. Milestones feel safer for both sides on bigger projects. What payment structure do most of your clients prefer and which one do you find works best for you?