How to Write a Business Plan for a UK Small Business (With a Worked Example)
A business plan is not a document you write to impress a bank. It is the first time you are forced to answer, in numbers, whether your business can actually work: who will pay you, what it will cost to serve them, and how long your money lasts if sales are slower than you hope. Lenders and investors read it for exactly that reason. A plan full of adjectives and no arithmetic tells them you have not done the thinking yet.
This guide covers every section a UK small business plan needs, shows each one filled in for a fictional example business, and ends with the mistakes that most often get plans rejected.
First, decide: one page or a full plan?
Not every business needs 30 pages. Choose by purpose:
A one-page plan is enough if the plan is only for you: you are self-funding, testing an idea, or clarifying your own thinking. One page forces you to state the offer, the customer, the price, and the monthly sales target, and nothing else.
A full plan (15 to 25 pages) is needed if you are asking anyone for money: a bank loan, a Start Up Loan, an investor, or a landlord who wants evidence you can pay the rent. These readers need financial projections, market evidence, and risks, not just enthusiasm. If you are raising finance, start with our guide to the cost of starting a business in the UK to ground your start-up cost figures before you write a word.
Section 1: Executive summary
One page, written last, answering five questions: What does the business sell? Who buys it? Why will they buy from you rather than a competitor? How much money do you need, and what will it be spent on? What will the business earn in years one to three?
Example: “Brighton-based Bloom & Bean is a neighbourhood café and bakery opening in March 2027. It serves speciality coffee and baked goods to commuters and local residents within a ten-minute walk of Brighton station. It needs £45,000: £25,000 for fit-out and equipment, £12,000 for six months of working capital, and £8,000 for launch marketing. Projected turnover is £142,000 in year one, rising to £198,000 in year three, with a year-one operating profit of £18,000.”
Notice what is missing: no claims about passion, no market size figures, no adjectives. Numbers and specifics only.
Section 2: Business description and structure
Describe what the business does, where it is based, and its legal structure: sole trader, partnership, or limited company. State who owns it and what each owner brings: relevant experience, qualifications, or industry contacts. If you have traded before, say for how long and what you learned.
For a new business, this section is short: two or three paragraphs. Its job is to establish credibility. A lender reading about a café founder who managed a coffee chain for six years reacts differently from one reading about a founder whose experience is drinking coffee.
Section 3: Products and services
List exactly what you sell, what each item costs the customer, and what it costs you to provide. State what makes your offer different: not “high quality”, which every competitor also claims, but something checkable, such as “the only café on the station approach baking on site before 7am” or “a fixed-price monthly bookkeeping package with no hourly billing”.
Include every revenue stream, including small ones: a café sells coffee, but also beans, cakes for takeaway, and room hire on quiet evenings. Lenders notice missing revenue lines because they suggest you have not thought the business through.
Section 4: Market analysis
This is where most weak plans fail. A market analysis is not a paragraph quoting the size of the UK café market. It must show you understand your specific customers and competitors.
Cover three things. First, your target customers, described precisely: “commuters aged 25 to 45 passing Brighton station before 9am, plus local residents buying weekend brunch”. Second, your direct competitors, named, with what they charge and where they are weak: the chain café with slow service, the independent café that closes at 3pm. Third, evidence of demand: footfall counts you did yourself, a survey of 100 local residents, or pre-opening expressions of interest. Your own small piece of research beats a borrowed national statistic every time.
Section 5: Marketing and sales strategy
Say how customers will find you and what it will cost to reach them. Name the channels: Google Business Profile and local search, Instagram, leafleting the streets around the premises, partnerships with nearby offices. Give a launch budget and a monthly marketing budget, and state your pricing strategy and why: premium pricing with a loyalty scheme, or competitive pricing to win volume.
Section 6: Operations
Explain how the business runs day to day: premises, suppliers, equipment, staffing, and key processes. Name your main suppliers and any dependency risk: what happens if your coffee supplier fails? State opening hours, staffing levels, and any licences or regulations that apply, such as food hygiene registration with the local council for a food business.
Section 7: Management and team
List the people who will run the business, their roles, and their relevant experience. Be honest about gaps: if no founder has financial experience, say you will use an accountant, and name the firm if you have chosen one. A plan that admits a gap and shows how it is covered is stronger than one that pretends the gap does not exist. If you are still deciding your business structure, our comparison of sole trader vs limited company tax sets out the trade-offs that belong in this section.
Section 8: Financial projections
This is the section lenders read first after the summary, and the section most founders rush. You need three things for three years: a profit and loss forecast, a cash flow forecast, and a start-up cost breakdown.
Profit and loss shows turnover minus costs, year by year. Cash flow is more important, because a profitable business can still fail if cash runs out: it shows, month by month, when money comes in and goes out, including VAT, tax, and loan repayments. Start-up costs list everything needed before the first sale.
Worked example, year one for Bloom & Bean:
| Line | Year one |
|---|---|
| Turnover | £142,000 |
| Cost of goods (coffee, milk, ingredients) | £42,600 |
| Gross profit | £99,400 |
| Rent, rates and utilities | £31,000 |
| Wages | £38,000 |
| Marketing | £6,000 |
| Other costs (insurance, accountancy, supplies) | £6,400 |
| Operating profit | £18,000 |
State your assumptions beneath the table: average spend per customer (£4.80), customers per day (110), and days open (300). Assumptions are what make projections believable. A projection with no assumptions is a guess; a projection with stated assumptions is a model a lender can test. Put your projections in the context of a wider business budget so the plan and your monthly money management agree with each other.
If you need external funding, state exactly how much, what it buys, and how it will be repaid. Government-backed Start Up Loans, for example, are a common route for new UK businesses; our guide to government startup loans explains the eligibility rules and the application process, and a lender will expect your plan to reflect the loan terms you are actually applying for.
Section 9: Risks and contingency
Name three or four real risks and what you would do about each: a key supplier fails, sales run 20 percent below forecast, a competitor opens nearby, or you fall ill. For each, state the trigger and the response: “If monthly turnover falls below £9,000 for two consecutive months, we cut opening hours on Mondays and pause paid advertising.” Lenders do not expect a risk-free business. They expect a founder who has imagined things going wrong.
Five mistakes that get plans rejected
Vague market claims. “The UK coffee market is worth billions” tells a lender nothing about your street. Name your customers and competitors.
No cash flow forecast. Profit is not cash. Plans without monthly cash flow are the most common reason small business loans stall.
Unstated assumptions. If your turnover figure appears from nowhere, a lender will assume it is invented. Show the arithmetic: customers multiplied by average spend multiplied by days open.
Understated start-up costs. Forgetting working capital is the classic error. You need cash to survive until customers pay you, not just to buy equipment. Price that honestly, and check your banking setup early: our guide to the best business bank account for a small business covers what to compare before you open an account.
A plan that is never updated. A plan written for a loan application and never opened again is wasted. Review it quarterly against actual figures, and update the forecast when reality diverges. The plan is a management tool first and a funding document second.
A final checklist before you send it
Read the whole plan once as a sceptical lender would. Every number should trace to an assumption. Every claim about customers should trace to evidence, and the executive summary should match the financial section exactly. A good business plan does not sell a dream. It proves, in plain numbers, that a real business is hiding inside the idea.
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