How to Evaluate a Business Idea

Many of the ideas that end up as Founders Scars stories did not fail for lack of effort. In the interviews I do, the post-mortem often points back to something that could have been checked in an afternoon: the buyer was vague, nobody was paying for anything similar, or the founder had no way to reach the people they were building for. This guide is the afternoon.

Why a structured evaluation helps

Founders tend to evaluate ideas by how excited they feel. Excitement is useful fuel and a poor filter. A short, repeatable checklist forces the same questions onto every idea, which is how you notice that your favorite one has no named buyer while a duller one has a queue of people already paying a competitor.

The stakes are real. Bureau of Labor Statistics data on US private sector establishments born in March 2013 show that about half were still operating five years later, and about 35 percent after ten. Many things cause closures besides the original idea, including money, timing, partners and plain bad luck. But choosing an idea with a clear buyer and workable economics removes some of the avoidable risk.

The six criteria

1. The problem

Start with the problem, not the product. Paul Graham calls solving a problem nobody has the most common mistake startups make. Ask how often the problem happens, how much it costs the person who has it (in money, time, risk or stress), and what they do about it today.

The strongest sign is that people are already working around it: spreadsheets, manual workarounds, hiring someone, paying for a clumsy tool. If nobody does anything about the problem today, it is often not painful enough to pay for.

2. The buyer

Name the buyer as narrowly as you can. “Small businesses” is not a buyer. “Owners of two to five location dental practices who handle their own scheduling” is. In business to business ideas, separate the user from the person who approves the purchase, because they are often different people with different priorities.

Graham’s image of a “well” is useful here: a small group that wants something badly is a better start than a large group that wants it a little. You can widen later.

3. Willingness to pay

This is where many ideas quietly fail. The SBA’s market research guidance lists pricing (what customers pay for alternatives) as one of six factors to check, alongside demand, market size, economic indicators, location and saturation. Existing spending is the best evidence you will get at this stage. If buyers already pay for a weaker solution, you have a price anchor. If they pay nothing for anything similar, you need a strong reason to believe that will change.

Be careful with what people tell you. Rob Fitzpatrick’s book The Mom Test is built around the point that people are polite about your idea, so compliments and “I would buy that” are weak evidence. Ask about what they did and spent recently, not what they would do in the future.

4. Reach

Reach is whether you can get in front of buyers repeatedly and affordably. Ask where the buyers gather, who they already trust, and whether you could personally contact twenty of them this month. Ideas aimed at people you already know, or a trade you have worked in, score high. Ideas that depend on paid advertising to strangers from day one score low, because you will be paying to learn.

This criterion connects directly to a later milestone, How to Get Customers for a New Business. If you cannot picture how the first customers arrive, the idea is not ready.

5. Fit with the founder

Fit covers skills, credentials, interest and circumstances. Do you have the skill to deliver the result, or the money to hire it? Does the business need a license you do not have? Will you still want to work on this problem in two years when it is no longer new? Does it suit the time you have, especially if you are starting a business while working full time?

Founders who run several businesses should add one more question: does this idea share an audience, skill or system with what they already run, or does it start from zero?

6. Economics

You do not need a full financial model, but you need rough numbers. The SBA suggests separating one-time costs (equipment, permits, a website) from monthly costs (rent, salaries, software), and counting at least a year of monthly expenses. It also gives a basic break-even formula: fixed costs divided by the difference between price and variable cost per unit gives the number of units you must sell to break even. It recommends adding about 10% for unexpected expenses.

Run that formula with honest guesses. If you need more customers than you could plausibly reach in a year to break even, the idea needs a higher price, lower costs or a different buyer. Pricing itself is a later milestone on the route, once you have buyers to test prices with.

The scoring table

Score each idea from 1 to 5 on each criterion. Write one line of evidence next to every score; a score with no evidence counts as a 1.

A total out of 30 is useful for ranking, but read the rows, not just the sum. Two rules keep the total honest:

• Any 1 on buyer or willingness to pay stops the idea until you find better evidence. Strong scores elsewhere cannot make up for nobody paying.
• A 1 on founder fit or reach is not fatal but changes the plan. It means a partner, a hire or a different starting market before anything else.

A worked comparison

Here is how three hypothetical ideas might score for a founder who spent years working in property management. The scores illustrate the method; they are not data.

The first idea fails on buyer alone. The second and third are close, and the difference sits in fit and reach, which is exactly where a founder’s background should tip the decision. The table does not pick the winner for you; it shows you where the real argument is.

Common evaluation mistakes

Treating competition as a dealbreaker. Graham argues that a crowded market shows demand, and that what matters is having a view on what existing players overlook. The SBA lists saturation as a factor to weigh, not a veto. Score willingness to pay higher when competitors exist, then ask what they leave out.

Scoring the solution instead of the problem. A clever product can hide a weak problem. Score the problem as if you had no solution yet.

Counting compliments as evidence. Friends, family and polite strangers will say they like your idea. Only past behavior counts: what they bought, what they tried, what they complained about.

Ignoring packaged opportunities’ paperwork. If the idea is a “business in a box” that someone is selling you, the FTC requires a one-page disclosure document at least seven days before you sign or pay, and a separate written statement for any earnings claim. Missing documents are an evaluation result on their own.

Stopping at the score. A high score is a hypothesis. The next step is to test it with real buyers, ideally by asking for money before you build, as described in How to Pre-Sell Before You Build.

From evaluation to validation

Pick the top scorer and the runner-up. For the top idea, write down the single assumption that would kill it if false, usually about the buyer or willingness to pay, and design the cheapest test of that assumption. That is the work of the next phase, How to Validate a Business Idea. If you are still building your list, the pillar guide How to Come Up With a Business Idea covers where candidates usually come from, and Boring Businesses That Make Money is a good source of ideas that tend to score well on problem and willingness to pay.