When working as a health psychology consultant it is likely that one will be required to engage in competitive processes to secure work. One of these is responding to an invitation to tender, or request for proposal. The amount of information a prospective client provides about their goals, preferences, and budget can vary wildly. This often leaves a wide margin for error, and many consultants can find it challenging to work with this level of uncertainty. Concurrently, timescales to submit a response are often shorter than most would like, creating additional stress. While there is no single ‘right’ way to prepare a proposal, there are some pitfalls that even an experienced consultant can fall into. These relatively minor mistakes or oversights can result in an excellent proposal never even hitting the decision-maker’s desk. This essay outlines some key areas for consideration when responding to a client’s request for proposals, highlights the potential perils, and proposes some strategies to maximise the chance of success. At the end of the chapter, readers are invited to consider developing their own systematic approach to responding to such requests, as a means to reduce both the stress and risk inherent in the tendering process.