So, although a detailed business plan may not be required for an online business, I am going to include it here so you can at least look at and consider each section and determine yourself if it applies to your business.
Summary Section: This section is where you will be able to attach or explain any detail not applicable to the previous sections. This section should be used to provide the financial statements of the Principle's involved in the business and any other data you think an investor would be interested in seeing.
I mentioned that the 'writing of a business plan' as one of the pivotal steps involved in setting up a successful business. By now you should understand the need for writing a business plan. Writing a business plan, for a traditional brick and mortar business, will probably take a lot of time. It may take up to 100 hours or even more. For obvious reasons, a new business needs to carry out a lot of research before a business plan can even be developed.
Explain the fundamentals of the proposed business: What will your product be? Who will your customers be? Who are the owners? What do you think the future holds for your business and your industry?