A small business plan is a written document that describes what your business does, how it makes money, who it serves, and where it’s headed financially. Whether you need one to secure a loan, attract an investor, or simply organize your own thinking before launch, the process follows a predictable structure. Here’s how to build one from scratch.
Pick the Right Format First
There are two main approaches to a business plan, and choosing the right one depends on what you need it for.
A traditional business plan is a detailed, formal document that typically runs 20 to 40 pages. This is what banks, SBA lenders, and most investors expect to see. It covers everything from your company’s mission to five-year financial projections, organized into clearly labeled sections. If you’re applying for a loan or presenting to someone who controls funding, this is the format to use.
A lean plan is shorter, often just one or two pages, and focuses on the core assumptions behind your business model. It’s built for speed. Instead of projecting revenue five years out, you identify your key hypotheses (who will buy, at what price, through what channel) and plan to test them quickly. Lean plans work well when you’re in the early idea stage, launching a side project, or running a startup where the product and market are still taking shape. You can always expand a lean plan into a traditional one later when the business matures or a lender asks for more detail.
The Core Sections of a Traditional Plan
A traditional business plan is built from a set of standard sections. You don’t need to write them in order, but the finished document should flow logically from “what we do” to “how we’ll make it work financially.”
Executive Summary
This is the first section a reader sees and the last one you should write. It’s a one- to two-page overview of the entire plan: your business concept, the problem you solve, your target market, how you’ll make money, and what you’re asking for (if you’re seeking funding). Think of it as the elevator pitch in written form. Many lenders and investors read only this section before deciding whether to continue, so make every sentence count.
Company Description
Explain what your business does, the legal structure (sole proprietorship, LLC, corporation), where it’s located, and what makes it different. Include the specific problem your product or service solves and who benefits from it. If you already have customers, mention that. If you have any competitive advantages, like a patent, exclusive supplier relationship, or proprietary technology, describe them here.
Market Analysis
This section shows you understand the industry you’re entering and the customers you’re targeting. Cover the size of your market, growth trends, and the major players already operating in it. Then narrow the focus to your specific customer segment: who they are, what they spend, and why they’d choose you over existing options. Use real data here. Industry reports, census data, trade association statistics, and competitor research all strengthen your case. A lender wants to see that demand actually exists, not just that you believe it does.
Organization and Management
Describe how your business is structured and who runs it. Include an organizational chart if you have a team, along with brief bios of key people. Highlight relevant experience directly. If you’re a solo founder, focus on the skills and background that qualify you to run this particular business. Investors and lenders fund people as much as ideas, so this section matters more than many first-time planners expect.
Products or Services
Detail exactly what you sell. Explain how it works, what it costs to produce or deliver, and what the customer experience looks like. If your product has a development timeline (software that needs building, a physical product that needs manufacturing), lay out the milestones and estimated completion dates. Address any intellectual property, licensing requirements, or regulatory approvals you need.
Marketing and Sales Strategy
Explain how you’ll reach customers and convert them into paying buyers. Cover your pricing strategy, advertising channels, sales process, and any partnerships or distribution methods you’ll use. Be specific. “Social media marketing” is vague. “Paid Instagram and Facebook ads targeting women ages 25 to 40 in urban areas, with a monthly ad budget of $2,000” gives a reader something concrete to evaluate.
Funding Request
If you’re seeking money, state exactly how much you need, how you’ll use it, and what type of funding you’re looking for (loan, equity investment, line of credit). Break the use of funds into categories: equipment, inventory, marketing, working capital, hiring. Lenders want to see that every dollar has a purpose and that the amount you’re requesting matches the scale of your plan.
Financial Projections
This is the section that makes or breaks your plan with lenders. The SBA recommends including a prospective financial outlook covering five years, with forecasted income statements, balance sheets, cash flow statements, and capital expenditure budgets. For the first year, go deeper with quarterly or even monthly projections, since that’s where your assumptions will be most closely scrutinized.
If your business is already operating, include income statements, balance sheets, and cash flow statements for the last three to five years. New businesses won’t have historical financials, but you’ll still need to build realistic projections based on your market research, pricing, and expected sales volume. Pulling numbers out of thin air is the fastest way to lose credibility. Ground every assumption in something observable: competitor pricing, industry benchmarks, or your own pilot sales data.
How to Build Financial Projections
Financial projections intimidate most first-time business owners, but they’re really just math built on a set of assumptions. Start with revenue. Estimate how many units you’ll sell (or how many clients you’ll serve) each month in your first year, and at what price. Then estimate your costs: both the fixed expenses that don’t change with sales volume (rent, insurance, software subscriptions) and variable costs that rise with each sale (materials, shipping, transaction fees).
Your income statement (also called a profit and loss statement) shows revenue minus expenses over a period. Your cash flow statement tracks money coming in and going out, which matters because a business can be profitable on paper while running out of cash if customers pay slowly or expenses hit before revenue arrives. Your balance sheet is a snapshot of what the business owns (assets), what it owes (liabilities), and the owner’s equity at a specific point in time.
You don’t need accounting software to start. A spreadsheet works fine for early-stage projections. The key is internal consistency. If your marketing plan says you’ll spend $2,000 a month on ads, that number should appear in your expense projections. If your market analysis says the average customer spends $150, your revenue projections should reflect that figure. Lenders will spot disconnects between sections quickly.
What Lenders Look for Specifically
If you’re writing a business plan to apply for a bank loan or SBA-backed loan, understand that lenders evaluate more than just the document itself. For SBA 7(a) loans, the most common type of SBA financing, eligibility factors include what the business does to generate income, its credit history, and where it operates. The business must be for-profit, located in the U.S., and small enough to meet SBA size requirements. You also need to demonstrate that you couldn’t get the same financing on reasonable terms from other sources.
Beyond those baseline requirements, lenders want to see that you can repay the loan. That means your financial projections need to show enough cash flow to cover the loan payments with some cushion. They’ll also evaluate your personal credit, any collateral you can offer, and your experience in the industry. A polished business plan won’t overcome terrible credit or zero relevant experience, but a weak plan can sink an otherwise strong application.
For working capital loans specifically, lenders may expect at least one year of operating history and the ability to produce accurate, timely financial statements along with accounts receivable and accounts payable reports.
Writing a Lean Plan
If you don’t need a formal document for outside funding, a lean plan can be just as useful for internal clarity. A solid lean plan fits on a single page and covers these elements:
- Value proposition: What you offer and why it matters to your customer, in one or two sentences.
- Key customer segments: Who specifically will pay for this.
- Channels: How you’ll reach those customers.
- Revenue model: How you make money and what you charge.
- Cost structure: Your biggest expenses.
- Key metrics: The numbers you’ll track to know whether the business is working. For early-stage businesses, this often means customer acquisition cost, lifetime customer value, and churn rate (the percentage of customers who stop buying over a given period).
The lean approach treats every element as a hypothesis to test rather than a fixed plan to execute. You launch quickly, measure what actually happens, and revise. This works well for businesses where the product and market are still uncertain, but it won’t satisfy a banker who needs to see five-year projections and audited financials.
Practical Tips That Save Time
Write the executive summary last. You can’t summarize a plan you haven’t written yet, and trying to do so usually leads to vague filler that you’ll rewrite anyway.
Research before you write. Most of the time spent on a business plan should go into gathering data, not drafting prose. Your market analysis, competitive landscape, and financial assumptions all require research upfront. Once you have the data, the writing goes quickly.
Keep the language clear and direct. A business plan is a communication tool, not an academic paper. Short sentences, specific numbers, and plain language are more persuasive than jargon and buzzwords. If your grandmother wouldn’t understand a sentence, rewrite it.
Use free resources. The SBA website provides templates and detailed guidance for each section of a traditional plan. SCORE, a nonprofit network of volunteer business mentors partnered with the SBA, offers free one-on-one mentoring and workshops where someone with real business experience will review your plan and give feedback. These resources are genuinely useful and cost nothing.
Finally, treat the plan as a living document. The version you write before launch will be wrong in places, and that’s fine. Revisit it quarterly, update your financials with real numbers, and adjust your strategy as you learn what actually works in your market.