The business plan is a necessary but not sufficient condition for finding outside investors. The plan describes the business and what it might become, and that`s all. A beautifully written, edited, and formatted business plan will not make a less investible business more investible.
First, you want your business plan to be read. No one is going to read a 100-page or even 40-page business plan. Sure, you may need supporting documentation for specific sections but you can include those elements in your Appendix.
Investors and loan providers need to know that you have a solid understanding of the trajectory of your business. You need to prove that there is an attainable and sustainable need for your solution, that you have a strong business strategy, and that your business can be financially stable.
The pitch is a summary of the plan, organized according to highlights for investors, ideally a way to present your business in a structured way. The business plan is the bones of the pitch, like the screenplay, setting strategy, tactics, milestones, market, and essential numbers.
Second, your business plan should be a tool you use to run and grow your business. Something you continue to use and refine over time. An excessively long business plan is a huge hassle to revise—you`re almost guaranteed that your plan will be relegated to a desk drawer, never to be seen again.
The business plan is an essential component of normal due diligence. Never do a pitch without having a plan, because if investors like the pitch they will ask questions that you can`t answer without a real plan.