The question that tells you if your course idea will sell (before you build anything)
There's a single question that predicts course sales better than any landing page test, keyword tool, or audience survey I've seen:
"Have people already paid money to solve this problem?"
Not "do people have this problem." Not "do people say they'd be interested." Have they paid — for a book, a coach, a workshop, a competitor's course, even a bad solution they abandoned?
Why this question works:
- Existing payment proves the pain is real. People tolerate free problems forever. They only pay when the cost of not solving exceeds the price.
- Existing payment proves the budget exists. You're not educating a market about why they should spend; you're competing for money already being spent.
- Existing payment reveals the language. Read the reviews of whatever they bought. The complaints are your differentiation. The praise is your minimum viable quality bar.
The failure mode this question catches: "Everyone struggles with X" ideas. Everyone struggles with productivity, mornings, motivation. But if nobody in your target group has ever paid to fix it, you're not launching a product — you're launching a persuasion campaign against human nature. Those take years and budgets most indie creators don't have.
Where to check in 30 minutes:
- Search Udemy/Amazon for your topic. Any book or course with 50+ reviews = payment exists.
- Search Reddit/Facebook groups for "I paid for" + your topic.
- Look at competitor pricing pages. If 3+ competitors charge money, the market is proven (saturation is a separate, more solvable problem).
And once the answer is yes, keep the validation cheap: a live pilot workshop on a commission-only platform (iLoquio, Payhip — $0/month, ~5% per sale) costs nothing to test. Fixed-fee platforms make sense later, when the sales volume justifies them.
The best course ideas aren't the cleverest. They're the ones where the customer has already voted with their wallet.
What did you check before building your last product?
