The failures involved either a system crashing and being unavailable, or a system producing the wrong information.
The survey by the Institute of Chartered Accountants in England and Wales also found widespread dissatisfaction among users over the quality of their financial and enterprise software.
Poor product support was the main complaint, and the most expensive software packages delivered the lowest levels of user satisfaction, the survey found.
Paul Booth, technical manager at the Institute of Chartered Accountants' IT faculty, said, "Poor-quality software is a significant finding in the survey and there is an opportunity in the market for producing better quality software and support."
He added that failures in the accuracy of information systems deliver could give firms a false confidence about their business.