Workforce jobs (WFJ) is a quarterly measure of the number of jobs in the UK and the preferred measure of the change in jobs by industry. This article explains the processes and other causes of revisions on the WFJ, showing their impact on the series in terms of the revisions to levels and annual growth. The revisions are mainly due to benchmarking the shortterm series to the latest estimates from the Annual Business Inquiry for 2006 and 2007, and taking on reweighted Labour Force Survey inputs to WFJ. Economic & Labour Market Review (2009) 3, 39–43; doi:10.1057/elmr.2009.43