How to tell if your idea makes money
Some ideas fail because nobody wants them. A surprising number fail because plenty of people want them at a price that does not work. The founder is busy, customers are happy, and the bank balance keeps falling.
The money category asks two questions. Will buyers pay a price that supports you? And does each sale make money after every cost, including the cost of finding the customer? An idea can have a great market and a real problem and still fail this test.
Start with one sale
Forget annual projections for a moment. Look at one customer.
Write down what they pay you. Then write down everything it costs to deliver what they bought: materials, software, shipping, payment processing (usually around 3 percent), and your time at a fair hourly rate. The difference is your gross profit per sale.
Most founders leave out their time. That is how a business can look profitable on paper while paying its owner less than minimum wage. If you would have to hire someone to do the work eventually, count what you would pay them now.
Then add the cost of finding them
Customers do not arrive for free. If you run ads, you pay for every click and only some clicks become sales. If you do outreach, you spend hours. If you attend events, you pay for booths and travel. Divide what you spend by the customers you win, and you have your customer acquisition cost.
The basic health check: over the time a customer stays with you, the gross profit they bring should be at least three times what it cost to win them. Under that, you are working hard to stand still. Under one, every new customer makes you poorer.
A worked example
Take the mobile dog groomer in our teardown library. At her original $65 price, she could groom about five dogs a day once driving was counted. That is $325 a day, or about $78,000 a year, before the van payment, fuel, insurance, and supplies. After costs, she would have earned less than her salon wage while taking on all the risk.
At $105, the same five dogs produced $525 a day, about $126,000 a year. Nothing else changed. The work, the van, and the customers were the same. The price decided whether the business could survive.
Price the thing you actually sell
The most common pricing mistake is copying a competitor. It feels safe. It is often wrong, because when you copy a price, you copy someone else's cost structure along with it. A salon can charge less than a mobile groomer because it serves more dogs per day. A large software company can charge less than a solo founder because it spreads costs over thousands of customers.
Price based on the value of what you sell to the buyer you are selling to. A person paying for at-home grooming is buying convenience and calm for an anxious dog. A business buying a time-saving tool is buying hours back. Ask what the result is worth to them, not what the cheapest option costs.
Find the real price before you build
You do not have to guess. Three ways to learn what people will pay:
- Ask about current spending. What do they pay today for the closest alternative, including their own time?
- Offer a real price. Describe the offer and the price, and ask for a deposit or a pre-order. A refundable $25 deposit tells you more than a hundred survey answers.
- Test more than one price. Offer different prices to different groups and watch what happens. Many founders discover they can charge far more than they feared.
If nobody pushes back on your price, it is probably too low. A healthy price produces some no's.
The money traps
Thin margins on physical products. Products carry costs that services and software do not: inventory, damage, returns, warehousing, and cash tied up in stock. As a rough rule, a product needs a retail price several times its landed cost to survive marketing and mistakes. The heated lunchbox in our library cost $41 to make and was priced at $89, which left almost nothing after real-world costs.
Tiny revenue per transaction. Marketplaces and low-priced apps often earn a few dollars per sale. That only works at enormous volume. The climbing gear marketplace in our library earned $3.60 per sale and needed over 2,000 sales a month just to cover costs.
Assuming customers stay forever. Subscription spreadsheets often assume people stay for years. Use a cautious estimate. If customers only need you occasionally, they will cancel between needs.
Underpricing to win. A low price attracts the most price-sensitive buyers, who are often the most demanding and the quickest to leave. It also leaves no room to pay for marketing.
What strong money looks like
- You know your gross profit per customer, including your time.
- Customer lifetime profit is at least three times acquisition cost.
- Your price is based on the value to the buyer, not a competitor's number.
- At least some potential buyers have committed real money: a deposit, pre-order, or paid pilot.
- The number of customers you need to meet your income goal is realistic for your market.
What weak money looks like
- You do not know what it costs to deliver one sale.
- Your price was chosen to match or beat a competitor.
- Your profit depends on volume your market cannot produce.
- Your plan only works if you work for free.
- You have never asked anyone for money in advance.
Your next step
Fill in the numbers for one customer on a single page: price, delivery cost, your time, acquisition cost, and how long they stay. If the math works, find out whether real buyers agree by asking for a deposit. If the math does not work, change the price, the delivery, or the buyer before you build. Raising a price on paper costs nothing. Discovering the problem after launch costs a great deal.