Even though the summary will be read first, it is easiest to write it last – providing an overview of the complete business plan. The aim is to draw the reader in, so what you include will depend on your audience. If you are seeking funding you need to really sell your business idea in the summary.
Size your business plan to fit your business. Remember that your business plan should be only as big as what you need to run your business.
If you are seeking finance for your business, you will need to show banks and investors why they should invest in your business. Lenders and investors will only risk their time and money if they are confident that your business will be successful and profitable.
Business plans may target changes in perception and branding by the customer, client, taxpayer, or larger community. When the existing business is to assume a major change or when planning a new venture, a 3 to 5 year business plan is required, since investors will look for their investment return in that timeframe.