How to write a business plan: sample structure and checklist

A business plan is a roadmap that turns your startup's idea, market, revenue model and goals into a concrete document. It can be presented to an investor, bank or grant programme, but its real value is that it forces you to think through key questions. A good business plan is not long but clear, realistic and measurable. In this guide we cover the sections of a business plan, what to write in each, how to prepare the financial section and common mistakes.

Why is a business plan needed?

• It lets you systematically test the idea and assumptions.
• It makes resource needs (money, time, team) visible.
• It creates a shared direction among partners and the team.
• It is the base document for investors, banks and grant bodies; see writing a grant application and the KOSGEB support guide.
• It lets you track performance against the plan.

Plan types

• One-page plan (lean canvas): Quick direction at idea stage.
• Short plan (10–15 pages): Enough for most startups and applications.
• Detailed plan: For bank loans, large investment or complex businesses.

Sections and their content

1. Executive summary

Tell the whole plan on one page: problem, solution, target customer, revenue model, team, financial summary and ask (if any). Written last but placed first.

2. Problem and solution

Describe the customer's problem, how painful it is and how your solution differs, with numbers. Use idea validation methods.

3. Market analysis

Target customer segments, market size and trends. See TAM SAM SOM and audience analysis.

4. Competitor analysis

Direct and indirect competitors, their strengths and weaknesses and your difference; see competitor analysis.

5. Product or service

What do you offer, how does it work, what is the development stage (idea, prototype, MVP)? See the MVP guide and product roadmap.

6. Revenue model and pricing

How will you earn (subscription, sales, commission, advertising)? What is your price based on? See pricing psychology and the SaaS business model.

7. Marketing and sales plan

Through which channels and how will you reach customers? What is your acquisition cost target? See content marketing, the B2B sales process and CAC and LTV.

8. Operations plan

Production/service process, suppliers, technology, location and processes.

9. Team and organisation

Founders' capabilities, critical roles and advisors. See how investors evaluate a team.

10. Financial plan

Detailed below.

11. Risks and mitigations

Market, technology, operational, legal and financial risks with a mitigation for each.

12. Milestones and timeline

Measurable goals for the next 12–24 months.

How to prepare the financial plan

1. Assumptions: Price, sales volume, conversion rate, growth rate, costs.
2. Revenue forecast: Monthly/annual revenue derived from assumptions.
3. Expense forecast: Fixed and variable costs, salaries, marketing.
4. Cash flow: When does money come in and go out? Most startups close from lack of cash, not lack of profit.
5. Break-even point: The sales level that covers expenses.
6. Financing need: How much, for what, until when? See the financial model guide and cash flow management.

Write the assumption behind each number; evaluators look for consistency. Preparing 3 scenarios — conservative, realistic and optimistic — builds trust.

Writing principles

• Plain language: Avoid jargon.
• Evidence: Back claims with interviews, pilots, pre-orders and data.
• Consistency: Market, plan and numbers should support each other.
• Focus: In each section answer the reader's question.
• Visuals: Use tables and charts.

Keeping the plan alive

A business plan is not written once and shelved. Compare with actuals every three months, update assumptions and tie goals to methods like OKRs.

Common mistakes

• Over-optimistic projections: Baseless estimates like "millions in year one".
• Inflating the market: "The market is 100 billion; if we get 1%..." logic.
• Claiming no competitors: There is always an alternative.
• A document too long and scattered
• Neglecting cash flow
• Never updating the plan

FAQ

How many pages should a business plan be? In most cases 10–15 pages is enough; investors are usually shown a pitch deck.

Is a business plan the same as a pitch deck? No; a pitch deck is short and persuasion-focused, a business plan detailed and operational.

Who should write the business plan? The founders. A consultant can help but the plan should reflect the founders' thinking.

Conclusion

A good business plan shows your startup's discipline of thought and realism. Write clearly, present numbers with their assumptions and use the plan as a living tool. To begin, you can also review the startup roadmap.