Barrett Business Services Inc. reported preliminary results for the fourth quarter ended December 31, 2013. For the fourth quarter of 2013, the company expects to report net revenues of approximately $144.5 million, an increase of 27% compared to $113.7 million in the fourth quarter of 2012. The company also expects to report non-GAAP gross revenues for the fourth quarter of approximately $779.3 million, an increase of 31% compared to $596.7 million in the same year-ago quarter.

Taking into account the effect of the increase in workers' compensation expense, the company expects diluted earnings per share in the fourth quarter of 2013 to range between $0.71 to $0.73. Excluding the increase, the company expects diluted earnings per share to range between $1.13 and $1.15, compared to $0.80 per diluted share in the fourth quarter of 2012.