The expensive part of inventing is not the patent or the tooling. It is the two years spent on something nobody was going to buy. Almost every inventor I meet who lost real money skipped the same week of cheap work at the start.
Here are the five tests I run before spending anything meaningful. Together they cost under $100 and about a week of evenings.
Test 1: The prior-art search (free, one evening)
- Search Google Patents and the USPTO full-text database for your function, not your product name.
- Search Amazon, AliExpress and Google Shopping for the problem in plain language.
- Search YouTube for people complaining about the problem — that is your demand signal.
- Finding something similar is not a death sentence. Finding nothing at all usually means no market, not a free market.
Test 2: The shelf test (free)
Write the product name, one benefit line and the price on an index card and show it to ten people in your target group. Do not explain it. If they cannot tell you what it does and roughly who it is for in five seconds, the product is not the problem — the positioning is, and that is fixable now instead of after packaging is printed.
Test 3: The landing page test (about $20)
- One page: hero image or rough render, the problem, three benefits, an email capture.
- Send 100–200 people to it from a cheap ad or relevant community post.
- Under 5% signup: the promise is not sharp enough. Over 15%: you have something.
- This also builds the launch list you will use later, so the money is never wasted.
Test 4: The paid pre-order test (the only real test)
Interest is free. Money is a verdict. Offer a pre-order, a deposit or a paid waitlist spot. Even five real card transactions tell you more than five hundred likes.
If you are not ready to fulfil, refund every order immediately and say so plainly. You are buying information, not taking risk with someone's money.
Test 5: The buyer conversation
- Call three shops, coaches, schools or distributors who would stock it.
- Ask what they currently buy instead, what it costs and how often they reorder.
- Ask what would stop them stocking a new version — that list is your product spec.
- One honest buyer call replaces a month of guessing.
What the results actually mean
Strong prior art plus weak buyer interest: walk away and keep the money. Weak prior art plus strong buyer interest: file the cheap provisional this week and build the prototype. Mixed results: usually a positioning or price problem, not an idea problem.
Only after the idea survives these five tests do attorneys, tooling and inventory make sense. Spend in that order and the worst case is a lost weekend instead of a lost year.
Frequently asked questions
Should I validate before or after filing a patent?
Do the free prior-art and shelf tests first. Then file a cheap provisional before any public test that discloses the invention, so your priority date is protected while you gather demand data.
Will people steal my idea if I test it publicly?
Far more inventions die from nobody caring than from theft. File a provisional first, keep the internal mechanics out of the ad, and test the promise rather than the blueprint.
How many people do I need for a valid test?
Ten conversations and a couple hundred landing-page visitors is enough to see a clear signal. You are looking for an obvious yes or no, not statistical significance.
What if the idea fails the tests?
That is the cheapest win available to an inventor. Keep the audience you built, adjust the promise or the price, and retest — most successful products are the third version of the original idea.
Stop researching. Start filing.
The Dream Kit System is the exact process behind two INPEX medals and a national Gopher Sports distribution deal — audio course, AI mentor and business setup.