Venture capitalists hope to be able to sell their stock, warrants, options, convertibles, or other forms of equity in 3 to 7 years, at or after an exit event; this is referred to as harvesting. Venture capitalists know that not all their investments will pay off. The failure rate of investments can be high; anywhere from 20% to 90% of the enterprises funded fail to return the invested capital. In case a venture fails, then the entire funding by the venture capitalist is written off.

Many venture capitalists try to mitigate the risk of failure through diversification. They invest in fledgling companies in different industries and different countries so that the risk across their portfolio is minimized. Others concentrate their investments in the industry that they are familiar with. In either case, they usually work on the assumption that for every ten investments they make, two will be failures, two will be successful, and six will be marginally successful. They expect that the two successes will pay for the time given to, and risk exposure of the other eight. In good times, the funds that do succeed may offer returns of 300 to 1000% to investors.