Even though the past few years seemed ideal for startup businesses, the fact is that nine out of ten startups fail before even reaching the profit-making point. One of the main causes is that business owners enter this highly competitive field without having a reasonable financial plan set up. And since most businesses require regular and large investments in order to become profitable, it too often turns out that their financial projections were unrealistic, which can further lead to bankruptcy. We'll go through some of the common financial mistakes so that you hopefully avoid the downfall of your startup.