No wonder so many lawyers in this country work long hours to meet productivity goals. A recent billing trends report finds lawyers spend only 29 percent of each workday on billable time.

That's only 2.3 hours of billable time for each eight-hour workday, according to the second annual Legal Trends Report, which was prepared and made public today by Clio, a Canadian company that provides cloud-based practice management for firms. The report includes data analysis and also the results of a survey of legal professionals and consumers.

The report, based on data from more than 60,000 paying Clio users that include U.S. firms of all sizes, also found an 82 percent realization rate, which is the percentage of billable hours that are invoiced, and an 86 percent collection rate, which is the percent of billed work that is paid. That means the average lawyer collects only 1.6 hours of billable time from each workday, according to the report.