There are five main types. These are: Solicited proposals – submitted in response to a specific matter. Unsolicited proposals – Drafted without any prior consultation and used to call for funding. Pre-proposals – An executive summary of a planner research work that spells out the budget estimates, targeted audience, planned methodology, and projective objectives. Continuation or non-competing proposals – Drafted to seek funding for ongoing work or project. Renewal or competing proposals – Written to compete for limited funding. In many cases, it pits multiple candidates and research writers. Renewal or competing proposals – Written to compete for limited funding. In many cases, it pits multiple candidates and research writers.