Managing client expectations is key when undertaking fixed price agile projects. It is important to educate clients on agile principles like flexibility for changes and iterative delivery. All expectations around scope, schedule, acceptance criteria, and change management should be clearly documented and agreed upon. Regular communication through progress updates, demos and reports helps align expectations by keeping clients aware of progress and importance of their inputs. Careful planning and transparency can help complete the project on budget while over-delivering on client needs.