We estimate the changing value of workplace pensions in the UK and incorporate their value into an estimate of the public sector pay differential. Falling pension membership in the private sector and growing value of public service pensions led to a significant increase in the estimated public sector pay differential from 1997 to 2009, even though headline pay grew faster in the private sector. From 2009 to 2012, although pay grew faster in the public sector, reforms to public service defined benefit pensions, particularly indexation to the CPI rather than RPI, significantly reduced the public pay differential.