To Do. Create a comprehensive checklist of all proposal requirements. The checklist will help you break the RFP down into more manageable pieces.Sample Letter Format Grant Proposal for Foundations​​ The letter format has traditionally been used for proposals to seek funds from private foundation sources. A business proposal template standardizes the format and structure of proposals, enhancing clarity and organization. Although there is not a standardized proposal template, there are several common elements that are typically included. Build a basic budget (without having to deal with calculations and formulas). This template features a set of hotlinked steps to help fill in the budget basics. Part 1 is an Adobe PDF template, and Part 2 is a Microsoft Excel budget template.