What is a business plan?

A business plan is one of the most frequently referenced documents in the startup world, yet many early-stage founders are unclear on what one actually needs to contain — or whether they genuinely need one given their stage and ambitions. Understanding its purpose helps you decide how much time and effort yours warrants.

A business plan is a written document that sets out what your business does, who it serves, how it will generate revenue, and how it plans to grow. At minimum it covers your product or service, your target market, your competitive landscape, your financial projections, and your operational approach. For early-stage founders a business plan functions as a thinking tool as much as a presentation document — it forces clarity on key assumptions before significant money or time is committed.

How detailed your business plan needs to be depends largely on its intended audience. A plan used to secure bank lending or investor funding requires considerably more rigour than one used for internal planning and focus. Our guides to writing a business plan and approaching funding cover both contexts in detail for UK founders.