A business plan often gets treated as a box to tick before applying for a loan, then filed away and forgotten. Written properly, it does far more than that. It forces you to think through your market, your numbers and your risks before you commit real money to them, and it becomes a genuine reference point as the business grows rather than a one-off document.
This guide covers how to write a business plan, section by section, whether it is for a lender, an investor, or simply your own clarity.
What a Business Plan Actually Does
A business plan is a document that communicates a company’s goals, direction, finances and strategy, whether aimed at securing funding or used internally to align a team and guide decisions as the business grows. Writing one forces you to think through every aspect of the business, often surfacing risks or gaps you had not fully considered.
Traditional Versus Lean Business Plans
A traditional business plan includes extensive detail across every area of the business and typically runs to several dozen pages, suited to formal lender or investor requirements. A lean plan is considerably shorter, focused on the essentials, and works well for internal use or early-stage idea development where a full formal document is not yet necessary.
Step 1: Write the Executive Summary
Despite appearing first, the executive summary is usually easiest to write last, once every other section is complete. It should briefly introduce the business, its goals, and the core purpose of the plan, giving a reader a clear, high-level view of everything covered in more detail below.
Step 2: Write the Company Description
Cover essential details such as your business name, founders, location and mission statement. This section should clearly answer what the business does, who it serves, and why it exists in its specific market.
Step 3: Conduct and Present Market Research
Provide evidence that you understand your target market and competitive landscape, including who your customers are and what gap your product or service fills. Investors and lenders specifically look for proof that you have genuinely researched this, not just asserted it.
Step 4: Outline Your Products or Services
Describe what you sell, how it works, and what makes it different from existing alternatives. Being specific here, rather than vague, makes the rest of the plan considerably more convincing.
Step 5: Detail Your Marketing and Sales Strategy
Explain how you plan to reach customers and convert them into sales, covering your key channels, pricing approach, and how you expect to compete for attention in your specific market.
Step 6: Describe Your Operations and Management Team
Outline how the business will actually run day to day, along with the relevant experience of your management team. This section reassures readers that the plan can genuinely be executed, not just imagined.
Step 7: Build Your Financial Plan
Include a budget, financial projections, and, for an existing business, historical income statements, cash flow and balance sheets. For a new business without financial history, focus on clearly reasoned projections that show you understand the economics of the business.
Step 8: Add Supporting Documents
Include an appendix with relevant supporting material, such as team CVs, detailed customer personas, or product demonstrations, that reinforce the credibility of the plan without cluttering the main sections.
Comparing Traditional and Lean Business Plans
| Aspect | Traditional Plan | Lean Plan |
|---|---|---|
| Typical length | 30 to 50 pages | One to a few pages |
| Best for | Lenders and formal investors | Internal clarity, early-stage ideas |
| Level of detail | Comprehensive across every section | Focused on essentials only |
| Time to prepare | Considerable | Much faster |
Tips for Writing a Business Plan That Actually Gets Used
- Use clear, concise language and avoid unnecessary jargon
- Write the executive summary last, once the rest of the plan is complete
- Treat it as a living document to revisit, not a one-off exercise
- Back claims with specific evidence and research, not assumptions
- Keep financial projections realistic rather than overly optimistic
Frequently Asked Questions
Do I need a business plan if I am not seeking funding?
It is still worth writing one, even in a lean format, since the process itself clarifies your goals, market and risks, and gives you a reference point to guide decisions as the business grows.
How long should a business plan be?
It depends on the purpose. A formal plan for lenders or investors often runs to 30 to 50 pages, while a lean plan for internal use or early development can be just a page or two.
Should I write the executive summary first or last?
Most experienced writers recommend writing it last, once the rest of the plan is complete, since it becomes far easier to summarise clearly after you have worked through every other section.
Can a business plan change after it is written?
Yes, and it should. A business plan works best as a living document, revisited and updated as the business develops and circumstances change, rather than treated as fixed once written.
Final Thoughts
Writing a business plan is less about producing a polished document for someone else and more about genuinely thinking through your business before committing real time and money to it. Whether you choose a traditional or lean format, the process itself, researching your market, outlining your finances, and clarifying your strategy, is where much of the real value lies.
