How to write a business plan

Published Monday 11 May 2026

Table of contents

• What is a business plan?
• Types of business plans
• Why do you need a business plan?
• How to write a business plan
• Why business plans fail
• Tips for writing a strong business plan
• Manage your business finances with Xero
• FAQs on writing a business plan

Key takeaways

• A business plan is a structured document that maps out your goals, strategy, and path to profitability. It typically covers 10 core sections, from an executive summary through to financial projections and supporting documents.
• Writing a plan forces you to validate your ideas, spot gaps in your strategy, and present a credible case to investors or lenders. Research suggests that businesses with a formal plan grow faster and are better prepared for challenges.
• Your financial plan is one of the most scrutinised sections. Include realistic revenue projections, cash flow forecasts, and a break-even analysis, and make sure your figures align with Making Tax Digital (MTD) requirements if you operate in the UK.
• Treat your business plan as a living document. Review it at least once a year, track your actual performance against your projections, and update your strategy as your market evolves.

What is a business plan?

A business plan is a written document that outlines your business goals, the strategy you'll use to achieve them, and the financial projections that show your path to profitability. It serves as a roadmap for how your business operates and how it will make money.

A business plan differs from a business proposal, which is a pitch to sell a specific product or service to a prospective customer. Your business plan is the strategic foundation; a proposal is a sales tool built on top of it.

Most business plans include sections covering your market, customers, operations, team, and finances. The level of detail depends on whether you're writing for internal guidance or to secure external funding.

Types of business plans

Not every business plan looks the same. The format you choose depends on your goals, your audience, and how far along your business is.

Traditional business plan

A traditional business plan is a comprehensive document, typically 15 to 30 pages long, that covers every aspect of your business in detail. It follows a structured format with sections on market analysis, financial projections, operations, and management.

This format is best suited for:

• Applying for a bank loan or investment funding
• Presenting to stakeholders who expect thorough documentation
• Businesses in regulated industries where detailed planning is required

Lean startup plan

A lean startup plan is a shorter, more focused document, often just one to three pages. It highlights your value proposition, key activities, target customers, and revenue streams without going into exhaustive detail.

This format works well for:

• Early-stage businesses testing an idea before committing to a full plan
• Founders who need a flexible document they can update frequently
• Internal planning where a quick reference is more useful than a lengthy report

Many businesses start with a lean plan and expand it into a traditional format as they grow or seek funding.

Why do you need a business plan?

A business plan turns your ideas into a structured document that others can evaluate and you can follow. With approximately 5.4 million companies on the Companies House register, standing out requires clear thinking and a credible strategy.

A business plan helps you:

• Clarify your thinking: writing forces structure onto your ideas, making them clearer on paper than in your head
• Spot gaps early: the planning process reveals holes in your strategy before they become costly problems
• Secure funding: banks, investors, and accountants expect a formal document before they commit resources
• Get better feedback: a written plan gives trusted advisors something concrete to review and improve
• Stay focused as you grow: a clear plan keeps you on track when daily tasks compete for attention

Research from the British Business Bank shows that small businesses with a formal plan are better positioned to manage cash flow, access finance, and adapt to changing market conditions.

How to write a business plan

Writing a business plan is easier when you break it into clear steps. The following 10 sections cover everything a strong plan needs, from your executive summary through to supporting documents.

Here is an overview of the steps:

1. Write an executive summary
2. Describe your business
3. Outline your products or services
4. Analyse your market
5. Define your target customers
6. Create a marketing strategy
7. Plan your operations
8. Build your management team
9. Develop your financial plan
10. Include supporting documents

1. Write an executive summary

An executive summary is a concise overview of your entire business plan. It describes your company, your product or service, your target market, and why your business will succeed. Think of it as your elevator pitch in written form.

Keep it short and memorable. Aim to describe your goal and mission in just a couple of sentences. Investors often read this section first to decide whether to continue, so clarity matters more than length.

Your executive summary should touch on:

• What your business does and the problem it solves
• Your target market and competitive advantage
• Key financial highlights, such as projected revenue or funding needs
• Your mission statement in one or two sentences

Read more in the guide on how to write an executive summary for a business plan.

2. Describe your business

The business description gives readers a clear picture of who you are and how your company is structured. This section sets the context for everything that follows.

Cover these key areas:

• Mission and vision: what your business exists to do and where you see it heading
• Legal structure: whether you operate as a sole trader, partnership, or limited company
• Location and history: where you're based and how your business started
• Milestones: any achievements or progress worth highlighting

If you're a new business, focus on your vision and the gap in the market you plan to fill. If you're already trading, include a brief history that shows momentum and growth.

3. Outline your products or services

This section explains what you sell and why customers will choose it. Be specific about the value your product or service delivers.

Include details on:

• What you offer: a clear description of each product or service
• Value proposition: what makes your offering different or better than alternatives
• Pricing model: how you charge and why that approach works for your market
• Development stage: whether your offering is live, in development, or planned

If you hold any patents, trademarks, or intellectual property, mention them here. These can strengthen your position with investors.

4. Analyse your market

Market analysis shows that you understand the environment your business operates in. This section combines your research on the wider market, your competitors, and the strengths and weaknesses of your own position.

Start by describing the size and trends of your market. Then address your competition directly:

• Direct competitors: businesses selling the same products or services as you
• Indirect competitors: businesses whose market overlaps with yours
• Barriers to entry: factors that make it harder for new competitors to enter your space
• Your unique selling proposition (USP): the specific reason customers will choose you over alternatives

Use a SWOT analysis to organise your thinking. SWOT stands for Strengths, Weaknesses, Opportunities, and Threats. Strengths and weaknesses are internal factors you can control; opportunities and threats are external forces in your market.

For example, a strength might be deep industry expertise, while a threat could be a well-funded competitor entering your area. Documenting these factors helps you identify areas where you can expand and risks you need to manage.

5. Define your target customers

Defining your target customers means getting specific about who will buy from you and why. Vague descriptions like "small businesses" or "young professionals" are not enough. Investors want to see that you've done the research.

Build a detailed picture of your ideal customer:

• Demographics: age, gender, income level, and location
• Firmographics: company size, revenue, and industry sector (for B2B businesses)
• Behaviours: purchasing habits, preferred channels, and decision-making factors
• Pain points: the specific problems your product or service solves for them

Validate your assumptions by speaking to potential customers before you finalise your plan. Real conversations reveal insights that desk research alone cannot provide.

6. Create a marketing strategy

Your marketing strategy explains how you'll attract customers and generate sales. Use the five Ps framework to structure your approach: Product, Price, Place, Promotion, and People.

• Product: what you're selling and how it meets your customers' needs
• Price: your price point and how it compares to competitors
• Place: the channels or platforms where customers can buy from you
• Promotion: how you'll reach your audience, including digital marketing, social media, content, and traditional advertising
• People: the team responsible for delivering the customer experience

Consider how your strategy will evolve as you grow. Early-stage businesses often rely on low-cost channels like social media and word of mouth before investing in paid advertising. For more guidance, see the small business marketing guide.

7. Plan your operations

Your operations plan covers the day-to-day activities that keep your business running. Set aside the big-picture strategy and focus on practical processes.

Document how you'll handle:

• Production: manufacturing, packaging, or service delivery
• Sales: how orders are taken and processed
• Customer service: how you'll handle enquiries and complaints
• Administration: invoicing, record-keeping, and compliance

This section shows investors you've thought beyond the idea to the execution. Include details on your supply chain, key suppliers, and any technology or systems you'll rely on.

8. Build your management team

The management team section outlines who you need to run your business successfully. Investors often say they back people as much as ideas, so this section matters.

Cover two categories:

• Core team: the roles you need to fill, the skills required, and the experience each person brings
• Advisors: trusted people who can guide and mentor you, such as accountants, lawyers, or industry experts

If you're a sole trader or early-stage founder, be honest about gaps in your team and explain how you plan to fill them. For guidance on growing your team, see the guide on how to hire employees.

9. Develop your financial plan

Your financial plan is one of the most scrutinised sections of any business plan. It proves to investors and lenders that your idea is financially viable and that you understand your numbers.

Include these key elements:

• Revenue projections: realistic estimates of your income over the next three to five years
• Cost breakdown: product costs, staff costs, marketing spend, and overheads
• Cash flow forecast: when money comes in and goes out, month by month
• Break-even analysis: the point at which your revenue covers your costs
• Funding requirements: how much you need and what you'll use it for

If you're based in the UK, make sure your financial processes align with Making Tax Digital (MTD) requirements for VAT. Keeping digital records from the start saves time and reduces the risk of compliance issues later. For help building your forecasts, see the cash flow forecasting guide.

10. Include supporting documents

Supporting documents, sometimes called appendices, provide the evidence behind your plan. Not every reader will look at this section, but having it ready shows thoroughness.

Common supporting documents include:

• CVs of key team members
• Detailed financial spreadsheets and projections
• Licences, permits, or regulatory approvals
• Letters of intent or contracts from customers or suppliers
• Product images, prototypes, or technical specifications

Keep these documents organised and clearly labelled. Reference them in the relevant sections of your plan so readers can find the detail if they want it.

Why business plans fail

Understanding why business plans fail can help you avoid common pitfalls. Most plans don't fail because of a bad idea; they fail because of poor execution or unrealistic assumptions.

The most common reasons include:

• Unrealistic financial projections: overestimating revenue or underestimating costs is one of the fastest ways to lose credibility with investors
• Ignoring the competition: assuming you have no competitors, or dismissing them, signals that you haven't done your research
• No clear target market: trying to sell to everyone usually means you reach no one effectively
• Failing to update: a plan written two years ago that hasn't changed is a plan that no longer reflects reality
• Lack of focus: trying to cover too many products, markets, or strategies at once dilutes your message and your resources

The best way to avoid these mistakes is to test your assumptions, seek honest feedback, and treat your plan as a working document rather than a finished product.

Tips for writing a strong business plan

A well-written plan is one that people actually read. These practical tips will help you create a document that's clear, credible, and useful.

• Keep it concise: aim for 10 to 20 pages for a traditional plan. Investors and lenders prefer clear, scannable documents over lengthy reports that rarely get read in full.
• Lead with your strengths: build your plan around what you do best, while being honest about areas for improvement. A realistic approach is more convincing than an overly optimistic one.
• Use plain language: avoid jargon and technical terms that your reader might not understand. If a sentence doesn't add value, cut it.
• Back up your claims: include data, research, or customer feedback to support your assumptions. Unsupported claims weaken your credibility.
• Get feedback early: share drafts with trusted advisors, accountants, or mentors before you finalise the document. Fresh eyes often spot gaps you've missed.
• Use a template: a free business plan template provides a proven structure and saves you from starting with a blank page. Download an example to use as a sample when writing your own.

Treat your business plan as a living document. Review it at least once a year, track your finances against your projections, and update your strategy as market conditions change.

Manage your business finances with Xero

A strong business plan deserves strong financial foundations. Xero accounting software helps you track cash flow, send invoices, and stay on top of your numbers so you can focus on growing your business.

Get one month free and see how Xero can support your business plan from day one.

FAQs on writing a business plan

Here are answers to frequently asked questions about writing a business plan.

How long should a business plan be?

A traditional business plan is typically 15 to 30 pages, though the core content can often fit into 10 to 20 pages. A lean startup plan may be as short as one to three pages. The right length depends on your audience and purpose; a plan for investors needs more detail than one for internal use.

What is an executive summary in a business plan?

An executive summary is a concise overview of your entire business plan, usually one to two pages long. It covers your business concept, target market, competitive advantage, financial highlights, and funding needs. Investors typically read this section first to decide whether the rest of the plan is worth their time.

What are the different types of business plans?

The two main types are traditional and lean startup plans. A traditional plan is a detailed, multi-section document suited to investor presentations and loan applications. A lean startup plan is a shorter, more flexible format that focuses on key assumptions and is easier to update as your business evolves.

How often should a business plan be updated?

Review your business plan at least once a year, or whenever significant changes occur in your market, finances, or strategy. Regular updates keep your plan relevant and help you measure progress against your original goals. Treating it as a living document makes it a practical management tool rather than a one-off exercise.

Can I write a business plan myself?

You can write a business plan yourself using templates and guides. Many successful businesses start with a self-written plan that evolves over time. However, an accountant or business advisor can help with financial projections and ensure your plan is credible to investors and lenders.

Why do business plans fail?

Business plans most commonly fail because of unrealistic financial projections, a poorly defined target market, or a failure to account for competition. Plans also become ineffective when they're treated as static documents rather than updated regularly. Testing your assumptions and seeking honest feedback from advisors can help you avoid these mistakes.