Willingness to Pay and Demand Validation
Validating demand is a narrowing-down exercise: figure out who keeps running into the problem, what their current workaround actually costs them, and on what terms they would trade it for something new. Interviews, small trial runs, and completed sales each surface something different, so use whichever one answers the question you're stuck on.
What People Say vs. What They Pay
Willingness to pay is the maximum price a buyer would accept for some amount of a product or service. Asking someone what they would pay and asking them to make a choice with real payment consequences are different measurement settings. Research across consumer goods finds that hypothetical amounts can exceed those measured when payment is real. The difference varies with the product and research method.
So structure a small trial as two acts. First, conversation, to find out why anyone would consider switching in the first place. Then real terms: a specific price, specific deliverables, and a genuine decision to make. Different behaviors answer different questions:
| What you observe | What it tells you |
|---|---|
| They walk you through a recent problem and how they handled it | When the need surfaces, and what their current solution costs |
| They share contact details, send a spec, or book a trial | How much of their own time they're willing to spend evaluating you |
| They pay under your stated terms and take delivery | Which quote, delivery setup, and customer mix actually produced a sale |
| Feedback after delivery, refunds, repeat orders, referrals | Whether the product holds up, and whether the revenue sticks |
Buffer's Three-Step Test
Buffer's founder described their early launch in three stages, and it's worth borrowing as a template. First, a product page that collected email addresses, so they could measure interest. Then a pricing page added on top, so they could watch which plan people picked. Only then did they finish a working product and start taking real payments. The stages added information about interest, price choices, and transactions.
The habit to copy: decide the question first, then choose the behavior that can answer it. Invest only as much as it takes to get the next piece of feedback, then use that feedback to decide the next investment.
Keeping Score on a Round
During each round, write down what you actually measured: which channels you ran, how many relevant people saw the explicit offer, how many asked about it, how many paid, and what happened with refunds and delivery afterwards. Give each rate a clear denominator so you can compare channels and versions.
Tag buyers by origin as you record them. A friend buying a discount because they like you and a stranger who found your site cold and paid full price are two different signals. Recording these conditions separately helps you judge what to repeat.
In conversations, start where the evidence is: when did this problem last hit you, what did you do about it, what did that cost? Only then bring out a sample and a quote. When the sale includes delivery in the future, put the terms in writing where the buyer sees them, exactly what they're getting, when, how payment works, and what cancellation means.
Selling to a business usually puts several people at the table, the one who feels the need, the one who controls the budget, the one who approves or signs. Note which role each person plays. Also record the expected procurement timeline to understand how far the purchase has progressed.
Deciding What Comes Next
When the round ends, connect the results to your notes on reasons to buy and to the initial customer group you set out to serve. For deals that actually closed, record delivery and acquisition costs alongside. Every round should leave behind one checkable fact, the problem, the choice, the delivery, or the economics, instead of just a better feeling about the product.
- Before expanding delivery, use repeatable products and scalable income to calculate reuse and the cost of additional customers.
- Review completed tests with experiment results and their conditions, then allocate the next round of resources using opportunity cost and staged investment.
Complete reading route: from finding customers to earning money.