A business investment proposal is a written document that outlines an opportunity for potential investors. It explains the why and how of a proposed business venture in detail, including its funding needs, forecasts, and market analysis. Investing in a business can be risky, so your proposal must be well-informed and persuasive in order to attract the attention of potential backers. Your investment proposal should demonstrate your knowledge of the industry and your commitment to success. It should also be comprehensive—covering everything from legal issues to financial projections—so investors can make the best decision possible about whether or not to invest in your business.