Learning how to write a business plan for a small business starts with a simple question: who is going to read it? If the plan is for you, a one-page business plan can be enough to keep decisions sharp. If it is for a lender or investor, expect a fuller small business plan with clear financials and a cash flow forecast.
Who the plan is for decides how long it is
A plan written for yourself can be short and practical. You already know the context, so you do not need to explain every assumption. A one-page business plan that lists the problem, your offer, your customer, your main channel and the numbers that matter is often more useful than a 20-page document you never reopen.
A lender will usually tell you what it needs. Many ask for a cash flow forecast, because they want to see whether the business can service repayments. They may also ask for start-up costs, a sales forecast and details of any security or personal guarantees. Follow their list rather than guessing.
An investor reads for a different reason. They want to see the market opportunity, why your offer wins, how you will acquire customers, who is on the team and how their money turns into growth. The plan still needs to be tight, but it will spend more time on market and scale.
How to write a business plan section by section
Executive summary
Write this last. In half a page, cover what the business does, the problem it solves, who it serves, the key numbers and the funding ask. If a reader only remembers one thing, it should be this section.
The problem and your offer
Describe the customer pain in plain language. Then explain what you sell, why it solves that pain and why now is the right time. Avoid vague claims such as "high quality" or "great service". Show the specific outcome the customer gets.
Customers and market
Base this section on your own research, not invented market sizes. Segment your customers by need, buying trigger, budget and decision maker. Note where they already look for solutions and what they currently do instead. Ergora's Deep Research can help you gather cited, multi-step web research for the market and competitor sections, which keeps the plan grounded in evidence you can revisit.
Competitors
List direct and indirect competitors. For each one, note what they do well and where they fall short for your target customer. Then state your difference in one or two sentences. A clear positioning statement helps here, and this guide to positioning a small business walks through the exercise.
Marketing and sales plan
Name the channels you will use first, the offer you will put in front of customers and the cost you expect to pay for each lead or sale. Include the follow-up steps from first contact to closed deal. Ergora's Campaign Planner can turn your goal into a campaign brief with audience personas, which helps shape this section. When the plan becomes live work, the Sales pack has a built-in CRM with a pipeline board to track deals without leaving the workspace.
Operations
Explain how you deliver the product or service, who supplies what and which tools or processes keep the work moving. Include capacity constraints, such as how many orders or clients you can handle before you need to hire or buy more.
Team
List the key roles, who fills them now and which gaps you need to close. Advisors, contractors and part-time help count. For a lender or investor, show that the right people are in place or that you have a credible plan to bring them in.
Financials and funding needed
Start with start-up costs, then build a sales forecast from assumptions you can explain. For example, if you expect 20 customers a month at £250 each, say why that number is reasonable. A cash flow forecast matters more than profit on paper, because a business can be profitable and still run out of cash. Calculate break-even by dividing fixed costs by gross margin per sale. As an illustration, if fixed costs are £8,000 a month and your gross margin is £200 per sale, you need 40 sales a month to break even. These are made-up round numbers, not a forecast for your business.
If you already run the business, the Finance pack connects to Xero, and its Live Forecasting tool shows burn, runway and three scenarios from your connected Xero data. For more on keeping cash moving, read this guide to managing cash flow in a small business. Finally, state how much funding you need, what you will spend it on and what the lender or investor gets in return.
A one-page business plan for day-to-day use
A one-page business plan strips the document down to the decisions you actually revisit. Keep these five blocks on a single page:
- Problem: the customer pain in one sentence
- Offer: what you sell and the outcome it creates
- Customer: who buys first and why
- Channel: the one or two routes that bring customers in
- Numbers: monthly sales target, break-even point and cash runway
Add a short "next 90 days" list so the plan drives action instead of sitting in a drawer.
A simple business plan template
Use this table as a business plan template. The rough lengths assume a fuller plan for a lender or investor, not the one-page version.
| Section | What to include | Rough length |
|---|---|---|
| Executive summary | Problem, offer, market, key numbers, funding ask | Half a page |
| Problem and offer | Customer pain, your solution, why now | Half a page |
| Customers and market | Segments, needs, buying triggers, research notes | One page |
| Competitors | Direct and indirect alternatives, your difference | Half to one page |
| Marketing and sales | Channels, offers, pipeline steps, costs | One to two pages |
| Operations | Delivery, suppliers, tools, capacity | One page |
| Team | Roles, gaps, advisors, hiring plan | Half a page |
| Financials | Start-up costs, sales forecast, cash flow, break-even, funding ask | Two to three pages |
Common mistakes that sink small business plans
- Forecasts with no reasoning behind them. A sales number means nothing unless you can explain the assumptions that produce it.
- No cash flow forecast. Lenders usually want to see one.
- Writing for yourself when the reader is a lender. Explain terms, context and assumptions the reader cannot know.
- Padding the plan with generic market statistics. Use your own research and tie every fact to your specific customer.
- Hiding weaknesses in competitors or operations. A plan that ignores risk looks less credible, not more.
Keep the plan alive with a quarterly review
A business plan is not a one-off document. Every quarter, compare what actually happened with what you forecast. Note where revenue, costs or cash came in differently and update the assumptions. If you already have financial data, this CFO toolkit covers seven financial reports every business owner needs, which can make the review faster and more consistent.
A small business plan is a working document
The best plan is the one you actually use. Start with the reader in mind, keep the financials honest and revisit the numbers every quarter. Ergora is an AI business suite for small businesses and lean teams, with 12 specialist packs in one workspace. Seat plans start at $99 a month, specialist packs are added from $59 a month each, and the only offer is 50% off the first month plus a 30-day money-back guarantee. See the pricing page for the current details.
Frequently asked questions
How do I write a simple business plan?
Start with one page that covers the problem, your offer, your customer, your main channel and the numbers that matter. Write the executive summary last, after you have worked through the other sections. Keep the language plain and base every forecast on an assumption you can explain.
What are the main sections of a business plan?
The usual sections are an executive summary, the problem and your offer, customers and market, competitors, marketing and sales, operations, team, financials and funding needed. A lender may ask for additional items such as a cash flow forecast or a personal financial statement. The order can change, but the financials should always tie back to the rest of the plan.
How long should a business plan be?
A plan for your own use can be one page. A plan for a lender or investor runs longer, with financial tables, depending on what the reader asks for. The right length is the shortest document that answers the reader's questions without padding.
Do I need a business plan to get a business loan?
Many lenders ask for one, and they will usually tell you which sections they want. A cash flow forecast is one of the parts they look at closely, because it shows whether the business can cover repayments. You may not need a long investor style document, but you should prepare the financial sections carefully.
What is a one-page business plan?
It is a condensed version that captures the problem, offer, customer, channel, key numbers and next 90 days on a single page. It works well for internal decisions and quick alignment, but it is usually not enough for a lender or outside investor. Many owners keep one as a working summary even when a longer plan exists.
How often should I update my business plan?
Review it at least every quarter against what actually happened. Update the sales forecast, cash flow and any assumptions that no longer hold. A plan that is revised regularly is more useful than a long document written once and forgotten.