For an online business, a detailed and in depth business plan is usually not necessary unless you are trying to combine your online business with a traditional business. For most online business startups, the detail involved with planning a traditional business is not required. However, it would still be beneficial to you if most of the topics were still covered, even if only briefly. Having a written plan in front of you will help you to focus on important aspects of the business.
You can find a sample business plan for a small business in all kinds of formats. There is a sample business plan for a small business where you basically fill in the blanks or you can have access to a sample business plan for a small business where you can pattern yours from it or you can develop a business plan that is centered on what you want for your dreams and your life.