How to write a one-page business plan.

Why one page beats forty

A traditional business plan takes weeks, is out of date the day it is finished, and is mostly read by its author. A one-page plan takes an afternoon, fits on a wall, and is easy to change when a customer conversation proves you wrong — which, early on, is the point. The most widely used one-page format is the Lean Canvas, created by Ash Maurya by adapting Alexander Osterwalder's Business Model Canvas for new businesses.

The boxes, in the order to fill them

The canvas has nine main boxes, three of which have a second part. Fill them in this order, because each one depends on the one before:

1. Customer segments — who has the problem. Be uncomfortably specific. Add early adopters: the subset who need it most, right now, and would use an imperfect first version.
2. Problem — the top one to three problems those customers have. Add existing alternatives: how they solve it today, even badly. If the answer is "they do not bother", the problem may not be painful enough.
3. Unique value proposition — one clear sentence on why you are different and worth paying attention to. Add a high-level concept: a short analogy such as "Calendly for dog groomers".
4. Solution — the smallest set of features or services that solves each problem. Resist listing everything you could build.
5. Channels — how those specific customers will find you and buy. Communities, partners, search, sales calls: name them.
6. Revenue streams — how you charge, and roughly how much per customer.
7. Cost structure — what it costs to run: people, tools, acquisition, delivery. This and revenue together tell you roughly how many customers you need.
8. Key metrics — the few numbers that show it is working, such as weekly active customers or the share who come back.
9. Unfair advantage — something that cannot easily be copied or bought: an audience, expertise, a relationship. It is fine to leave this empty at first.

A worked example

Take a booking app for independent dog groomers. A first canvas might say:

• Customer segments: independent and mobile dog groomers. Early adopters: mobile groomers booked weeks ahead who lose money on no-shows.
• Problem: no-shows cost three to five slots a week; bookings arrive by text at all hours; reminders take an hour a day. Alternatives: a paper diary and WhatsApp; salon apps built for hairdressers.
• Value proposition: fewer no-shows and no booking admin, for groomers who work alone. Concept: Calendly for dog groomers.
• Solution: a booking page with deposits, automatic text reminders, pet profiles.
• Channels: grooming Facebook groups, trade shows, referral credit.
• Revenue: a monthly subscription, plus a small fee on deposits. Costs: developers, text message fees, hosting, trade stands.
• Key metrics: groomers active each week, no-show rate. Unfair advantage: the founder ran a grooming van for six years and knows hundreds of groomers.

You can load this exact example into the free Lean Canvas generator to see how a finished canvas looks.

Test the riskiest box first

Every box is a guess until a customer confirms it. Once the canvas is filled in, ask which box, if wrong, would sink the whole idea. Usually it is the problem (do they really care?) or the channel (can you reach them affordably?). Test that one first — with conversations, a landing page, or a handful of pre-sales — before building anything.

Keep it alive

Date every version. When a conversation changes your mind, make a new canvas rather than editing the old one, and keep the history: the differences between versions are a record of what you have learned, and a good story for investors. Review it monthly once you are trading, alongside your actual numbers.

When you still need a full business plan

Banks, some investors and grant applications still ask for a traditional plan with financial forecasts. The canvas is the best way to start one: each box becomes a section, and the revenue and cost boxes become your forecast. The cash flow forecast and startup cost calculator fill in the numbers.

Inside an AWGCOR account, the canvas is saved next to your targets, sales pipeline and cash forecast, and the AI assistant can see it when you ask for advice — see using the one-page plan in the dashboard.