Labour market enforcement· Labour market Zero-Hours Contracts: The latest figures and analysis 30 April 2014 Laura Gardiner Workers on zero-hours contracts are much more likely to be underemployed, to be looking for another job, and to be without union membership than staff on conventional contracts. Almost three in 10 of all those on zero-hours contracts (29 per cent) are looking to work more hours – either in their current job or by taking on new employment. This compares to just one in 10 (11 per cent) of those with fixed-hours work.