There are unpredictable reasons for the business success and survival i.e. both external and internal factors. A large number of business failure and success depends on the problems defined externally.

Most small business owners have limited experience in management while tend to have technical or professional skills. This can result in subsequent reversal of the fortune in the widespread business failure. Everyone including suppliers, investors, employees and customers lose when a business owner fails.

Internal causes of Business failure-
1. Lack of management
2. The deficit in invoicing
3. Incompetent sources of finance
4. Poor debts

Plan and forecast your business with proper account receivables, reports and keep track of inventory turnover and operating margins.
Handle the business metrics like a pro by choosing an Online Invoicing Software like Invoicera.

If you know some external factors for business failures, do mention it in comments.