Why Do Startups Fail? What the Data Says and What Founders Can Control
Startups fail for a mix of reasons, and the most common one founders name is money: running out of cash or being unable to raise more. In CB Insights' review of 111 startup post-mortems, reported by SmartCompany, 38% of founders said they ran out of cash or could not raise new capital, and 35% cited no market need. These are founders' own explanations, so treat them as signals, not proof of root cause.
The practical lesson is simple: cash is where problems show up last, and the numbers that warn you appear months earlier.
What the studies actually measure
- The figures come from post-mortems that founders wrote after closing, so they reflect how founders explain failure
- A company can list several reasons at once, so percentages add up to more than 100%
- Newer CB Insights analysis reported by other outlets puts running out of cash as the final event in a much higher share of shutdowns, while stressing that it is rarely the root problem; I could not verify those newer figures against the original report, so I do not quote them here
- Cash exhaustion is the point of failure; weak demand, high cost or slow sales are usually the cause
The usual chain of events
1. A product or channel is slower to earn than planned
2. Spend stays on plan because nobody reviews return per line
3. The cash forecast is missing, late or built on hope
4. A raise takes longer than the runway allows
5. The founder is negotiating from the last weeks of cash, not the first months
What founders can control
- Know your runway every week, not every quarter
- Tie every spend to a measured return, and cut what does not earn
- Start the raise with at least six months of runway, not three
- Hold a safety buffer in the forecast and treat it as untouchable
- Review the numbers monthly with someone who will ask hard questions
The free runway calculator and 13-week cash forecast template put numbers on this in an afternoon.
Get a second pair of eyes
The Startup Burn Audit reviews every spend line in 30 days: marketing return, software and vendor cost, build versus buy and negotiation. Book a free discovery call to start.
Frequently asked questions
Founders most often name running out of cash or failing to raise capital (38% in CB Insights' review of 111 post-mortems, reported by SmartCompany), followed by no market need (35%). These are founders' own accounts.
Is running out of cash the root cause of failure?Usually it is the final event rather than the root cause. Weak demand, high cost or slow sales typically come first.
How can a founder avoid running out of cash?Track runway weekly, forecast cash 13 weeks ahead, tie spend to measured return and start fundraising with at least six months of runway.
Do these statistics apply to startups in Oman or Australia?They come from a global sample of post-mortems, so treat them as general signals. They are not local failure rates for any country.
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Written by Akram El-Karrar, CPA, from the work we do for startups every week.