Make it clear and concise; include only the most important elements, keeping it at a maximum of half a page. To create the summary go back over your plan, pick three or four key messages and write a brief overview, then conclude with details of the action you want the reader to take.
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.
A business plan is not a document you create once and store in your bottom drawer. It is a living guide that you should develop as your business grows and changes. Successful businesses review and update their business plan when circumstances change.
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.