A business plan for an invention is a thinking document before it is a submission document. Its job is to force you to answer, on paper, who buys this, what it costs to make, what it sells for, and what has to be true for the math to work. Write it in eight short sections, keep it under fifteen pages, and lead with the problem and the customer rather than the invention. If you cannot complete the numbers section without inventing figures, that is the plan doing its job — it has just told you which assumption to go test next.

A Thinking Document, Not a Homework Assignment

Inventors often write a plan because someone asked for one — an investor, a grant program, an accelerator application. The result reads like a compliance exercise: forty pages, a lot of adjectives, and no arithmetic that survives a follow-up question.

The plans that work are the ones the founder wrote for themselves first. Writing it exposes the parts of your idea you have been hand-waving past: the customer you have never actually spoken to, the unit cost you have never quoted, the channel you assumed would just take your product. Fixing those on paper costs nothing. Discovering them after tooling is paid for is expensive.

The Eight-Section Structure That Works

1. The Problem and Who Has It

One page. Describe a specific person or business, what they currently do, and why the current solution is inadequate. Concrete beats broad every time — "independent bike shops lose an hour a day on X" is a plan; "the fitness market is growing" is not.

2. The Solution and What Makes It Defensible

What your product does, in plain language, plus what stops a competitor from copying it the month after you launch. Defensibility can be a patent, a manufacturing relationship, a data advantage, or a channel — but you have to name it. On the patent side, be accurate about what you actually hold: an issued claim, a pending application, or nothing yet. Our guide to provisional patent applications covers how to describe an early-stage filing honestly.

3. The Market — Bottom Up, Not Top Down

Skip the enormous total-market number pulled from a report. Build the estimate upward: how many potential buyers exist in the segment you can actually reach, what fraction plausibly buys, at what price. A defensible small number is far more persuasive than an indefensible large one. If you have no research budget, our guide to market research on no budget shows how to gather real inputs yourself.

4. Competition, Including the Status Quo

List real alternatives, including doing nothing, which is the most common competitor for a new product. Explain where you win and, credibly, where you do not. A plan claiming no competition tells a reader you have not looked.

5. The Product Plan and What It Costs to Develop

What stage you are at, what has to be built, and roughly what that engineering will cost and how long it will take. Use realistic figures — our overview of the cost to develop a new product gives ranges and typical timelines you can anchor to instead of guessing.

6. Unit Economics

The section readers turn to first. Manufacturing cost per unit, wholesale and retail price, gross margin, and the tooling or setup cost that has to be amortized. If any of those is a placeholder, mark it as an assumption rather than dressing it up as a fact. Our guide to how to price a product explains how the retail number and the manufacturing number constrain each other.

7. Go to Market

How the first hundred units get sold, then the first thousand — and by whom. Distinguish channels you have tested from channels you hope will work. If your intended route is licensing rather than manufacturing, say so and structure the plan around royalties; the tradeoff is laid out in licensing vs manufacturing your invention.

8. Money and Milestones

What you need, what it buys, and what will be demonstrably true when it is spent. Tie each tranche to a milestone a skeptic could verify — a working prototype, a signed pilot, a passed certification. Cover both equity and non-dilutive routes; federal programs are a real option for hardware, as described in our guide to the SBIR grant application.

Three Versions for Three Audiences

Write the content once, then package it three ways:

  • The full plan, ten to fifteen pages, for your own use and for anyone doing diligence. This is the version with the assumptions written down.
  • The investor deck, ten to fifteen slides, which is a narrative and not a compressed document. Structure guidance is in our article on the investor pitch deck for a physical product.
  • The grant or program version, which follows the funder's required outline exactly. Federal and state programs score against published criteria, and a beautiful plan that ignores the required structure loses points for no good reason.

The Classic Mistakes

  • Leading with the invention. Readers care about the problem first. The product is the answer, not the opening.
  • Top-down market sizing. A percentage of a huge number is the fastest way to look inexperienced.
  • Hockey-stick projections with no mechanism. If revenue triples in a year, say exactly what causes it — a distributor, a retail placement, a sales hire.
  • No manufacturing cost. A hardware plan without a credible unit cost is not a hardware plan.
  • Ignoring certification and compliance. Testing costs money and consumes calendar time; leaving it out understates both.
  • Confusing a plan with a feasibility study. They answer different questions — see our guide to a feasibility study for a product idea, which tests whether the thing can be built and sold profitably at all.

Treat It as a Living Document

The plan is most valuable when you revise it. Each time you get a real quote, a real customer conversation, or a real test result, replace the assumption with the fact and see what moved. Founders who do this arrive at investor meetings able to explain why a number changed, which is far more convincing than a plan that has never been touched since it was written. Note that this article is educational and general — it is not legal, tax, or investment advice, and an attorney or accountant should review anything you present to investors.

Projects House is an engineering firm, and the parts of a plan we can make solid are the technical and cost ones: what your product will actually cost to develop, what it will cost to manufacture at your intended volume, and how long it realistically takes. If you need those numbers grounded before you write the rest, tell us about your invention through our contact form.