"Among telecommuters, the average number of hours spent telecommuting is approximately 6 hours per week”. But 50-67% of those hours “occur in the overtime portion of the weekly hours distribution," according to a 2012 analysis of two nationally-representative datasets.
Noonan, M. C., & Glass, J. L. (2012). The hard truth about telecommuting. Monthly Labor Review, 2012(6), 38-45. Retrieved from www.bls.gov.