A business proposal is a written offer coming from a seller to a prospective buyer. Business proposals can be a key step in the complex sales process, when a buyer considers more than price in a very purchase. A business proposal is often a formal suggestion or plan collected from one of party to another to buy, sell, partner with another or even supply goods and services to them. There are three categories of business proposals: Formally solicited, Informally solicited and Unsolicited. This article focus on how to write an effective business proposal: Clearly Identify and Itemize the Proposals objective, Source all the Information You Will Need before Starting, Validate the Information, Sort and Group your Information, Assemble the Grouped Information into a Presentable Document.