A business plan is a written document that explains what your business does, who it serves, and how it will make money. In the UK, banks, lenders and schemes such as Start Up Loans expect to see one before they’ll consider funding you. Even if you never apply for finance, writing one forces you to test your idea before you spend money on it.
Who Needs a Business Plan, and Why
Anyone starting or growing a business in the UK benefits from writing one, but it becomes essential in a few specific situations:
- Applying for a Start Up Loan or other government-backed finance, where a plan is a mandatory part of the application.
- Approaching a bank or investor, who will use it to judge risk before lending or investing.
- Registering a limited company and wanting a clear roadmap for the first 12 months.
- Testing an idea before committing time and savings to it.
If you’re still deciding on a legal structure, it’s worth reading up on sole trader vs limited company in the UK first, since your structure affects several sections of the plan, including tax and liability.
What to Include in a UK Business Plan
A UK business plan needs ten core sections. Skipping any of them is one of the fastest ways to get a loan application or pitch rejected, because it signals you haven’t thought the business through.
| Section | What It Covers | Typical Length |
|---|---|---|
| Executive summary | One-page overview of the whole business | 200–300 words |
| Business description | What the business does and its goals | 150–250 words |
| Market research | Customers, competitors, market size | 250–400 words |
| Products or services | What you sell and why it’s needed | 150–250 words |
| Marketing and sales | How you’ll reach and convert customers | 250–350 words |
| Management and team | Who runs the business and their experience | 100–200 words |
| Operations plan | Premises, suppliers, day-to-day running | 150–250 words |
| Financial plan | Costs, pricing, cash flow, forecasts | 250–400 words |
| Funding request | How much you need and what it’s for | 100–150 words |
| Appendices | CVs, quotes, permits, supporting evidence | As needed |
How to Write a Business Plan Step by Step
1. Executive Summary
Write this section last, even though it appears first. It’s a one-page summary of your entire business: what you sell, who buys it, how big the opportunity is, and how much money (if any) you need. A lender or adviser often decides whether to keep reading based on this page alone, so keep it specific rather than vague. State your business name, legal structure, target customer, and your one clear goal for the next 12 months.
2. Business Description
Explain what your business does, what problem it solves, and what makes it different from existing options. Include your business’s registered name, its legal structure (sole trader, partnership, or limited company), and its location. If you haven’t registered yet, this is the point to decide, and our guide on how to register as a sole trader in the UK sets out the process step by step.
3. Market Research and Analysis
This is the section competitors’ plans usually get wrong: they describe an idea without proving anyone wants it. Include:
- The size of your target market, using a specific figure or credible estimate.
- Three to five direct competitors, and what they charge.
- Evidence of demand, such as pre-orders, surveys, or waiting-list sign-ups.
- Trends affecting your sector over the next two to three years.
Lenders read this section to check you understand your customers, not just your product.
4. Products or Services
Describe exactly what you’re selling and how it’s priced. If you have several products, list them with prices and margins. Explain what stage of development each one is at, and flag anything still in progress.
5. Marketing and Sales Strategy
Explain how customers will actually find you and buy from you. Vague statements like “we will use social media” don’t satisfy lenders. Instead, name the specific channels, the monthly budget, and the expected cost per customer. If digital marketing is part of your plan, our guides on low-cost marketing ideas for UK small businesses and local SEO for UK small businesses can help you build out this section with real tactics rather than generic ones.
6. Management Team and Structure
List the people running the business and their relevant experience. If you’re a sole founder, be honest about skills gaps and how you’ll cover them, for example through freelancers, an accountant, or a mentor found through free UK small business advice services.
7. Operations Plan
Cover the practical side of running the business day to day: premises, equipment, suppliers, and any licences or permits needed. If you plan to sell online, link this section to your plan for building a small business website in the UK.
8. Financial Plan and Forecasts
This section carries the most weight with lenders. Include:
- Start-up costs, broken down line by line.
- A cash flow forecast for at least the first 12 months.
- A profit and loss forecast for year one, and ideally years two and three.
- Your break-even point.
Round numbers with no working shown are a red flag to any lender. Show how each figure was calculated. If you’re unsure where to start, our breakdown of how much it costs to start a business in the UK gives realistic ranges by business type, and our guide to budgeting for a UK small business covers ongoing cash flow planning.
9. Funding Request
State exactly how much funding you need, what it will be spent on, and how it will be repaid or what return an investor can expect. Be precise: “£15,000 for stock, equipment and three months of marketing” is stronger than “some funding to get started.”
10. Appendices
Attach supporting evidence: your CV, supplier quotes, market research data, licences, or letters of intent from customers. This section is optional but strengthens every claim made earlier in the plan.
UK-Specific Considerations
A business plan written for the UK market needs to reflect UK rules, not generic advice aimed at other countries.
- Legal structure and tax: Your structure affects how you’re taxed. Sole traders pay Income Tax through Self Assessment, while limited companies pay Corporation Tax on profits. If you expect turnover above the VAT threshold, plan for VAT registration in your financial forecasts.
- Funding sources: The British Business Bank’s Start Up Loans scheme offers government-backed personal loans to new UK businesses, alongside free mentoring. The King’s Trust also supports young entrepreneurs aged 18 to 30 with funding and planning tools. Check current UK startup grants for sector-specific schemes.
- Compliance: If you’ll employ staff, your plan should account for National Minimum Wage and payroll costs from day one, not as an afterthought once you’ve hired.
Common Mistakes to Avoid
- Weak or missing financials. A plan with no cash flow forecast rarely gets past a lender’s first review.
- No real market research. Assuming demand without evidence undermines every other section.
- Copying a generic template. Lenders read hundreds of plans a year and can spot boilerplate language immediately.
- Ignoring compliance costs. Forgetting VAT, National Insurance, or licensing fees makes your forecasts unreliable.
- No clear ask. If you’re requesting funding, state the exact amount and its use; vague requests get declined more often than modest, specific ones.
For a wider list of pitfalls beyond the plan itself, see common small business mistakes to avoid in the UK.
How Long Should a Business Plan Be?
Most UK business plans run to 10–20 pages, or roughly 2,000–4,000 words, excluding appendices. A lean plan for internal use can be as short as one or two pages. Lenders such as Start Up Loans typically expect a fuller version covering all ten sections above.
Free Templates and Tools
You don’t need to build a plan from a blank page. A ready-made UK business plan template gives you the structure above already laid out, and our list of free tools for a UK small business plan covers spreadsheet templates for forecasting and free design tools for the finished document.
FAQs
Do I need a business plan to register a business in the UK? No. You can register a sole trader or set up a limited company without one. A plan becomes necessary when you apply for funding or want a clear operational roadmap.
How long does it take to write a business plan? A first draft usually takes between one and two weeks of part-time work, mostly spent on market research and financial forecasts rather than writing.
Can I get help writing a business plan for free? Yes. The British Business Bank, the King’s Trust, and local growth hubs all offer free templates and mentoring, and our guide to finding free UK small business advice lists more options.
Do sole traders need as detailed a plan as a limited company? Sole traders can use a shorter, leaner plan for personal use, but should still write a full version if applying for a loan.
What’s the difference between a lean plan and a full plan? A lean plan is a one-page summary used for internal planning. A full plan covers all ten sections in detail and is what lenders and investors expect to see.
