The mistake often looks like progress
A new website. Another feature. A signed lease. A bigger customer. Each can feel like proof that the business is moving forward.
The question is what the commitment has established. Has a customer agreed to pay? Can the business deliver? Is the work worth doing at the price offered? A visible milestone can leave the hardest assumption untouched.
Building before understanding the buying decision
Customer research needs more than compliments. Ask how people currently solve the problem, what is inconvenient and what would justify changing. Check who makes the decision and what has to happen before a purchase.
A feature request is not automatically a buying commitment. Before building, ask whether the requester represents a suitable customer group, whether the need repeats and whether the feature changes a real decision.
Pricing the task but not the work around it
A founder may price the main deliverable and forget discovery, setup, support, rework and collection. Record those activities. Check which costs vary with each job and which commitments continue whether or not the customer buys.
Do not solve an underpriced service by assuming volume will make every cost disappear. Identify the specific process improvement and test it. If the work is still uneconomic, change the scope, price or offer before scaling it.
An illustrative early customer problem
A founder sells a $500 service that was expected to take three hours. The first customer needs seven hours, including repeated clarification and revisions. At an illustrative internal time cost of $60 an hour, that is $420 of time before other costs and overhead.
The founder has not necessarily chosen a bad market. They have discovered that the offer is unclear or the delivery estimate is wrong. The next step is to review what caused the extra work and test a narrower, better-defined scope.
Offering the same service to twenty more people would not resolve that uncertainty. It would repeat it.
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Becoming the only route through the business
Early founder involvement is normal. Problems arise when every routine decision remains dependent on the founder after the work repeats. Document the next recurring decision, the information required and the limit another person can use.
Delegation does not mean abandoning oversight. It means replacing avoidable waiting with a clear standard and escalation route. Check whether the person has the skill and time to take the responsibility.
Ignoring the timing of money
Cash planning needs realistic receipts and payments, including the possibility that customers pay late. A projected annual profit does not guarantee the business can meet next month's commitments.
Agree a review point while you still have options. Do not wait until a commitment becomes urgent before asking whether the underlying offer works. Get professional assistance early when financial obligations may be difficult to meet.
Fix the assumption, not your entire business at once
Choose the most consequential uncertainty you can test. Gather evidence, make one controlled change and review the outcome. Record other changes that may have affected the result.
A useful founder is not someone who never gets an assumption wrong. It is someone who recognises the gap early enough to change the next decision.
Check the contribution, not just the sales figure
Change the fictional example to compare current pricing with a proposed discount. Keep all amounts on the same GST basis.
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Your next action
Review your last three significant commitments. For each, write the evidence you had, the assumption you made and what has happened since. Pick one current uncertainty and design a smaller test before committing further time or money.
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Lesson: Common startup mistakes and the evidence to check. Please do not include confidential client, financial, health or staff information.
Questions this lesson answers
What are common startup mistakes?
Common mistakes include untested demand, incomplete cost estimates, weak cash planning, unsuitable commitments and founder dependence. Check the evidence in your business rather than assuming every startup has the same problem.
Work out where your business is getting stuck
The free Growth Diagnostic asks ten questions across acquisition, conversion, relationships, delivery and commercial control. It gives you an area to investigate and three things you can do next.
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