The transition from a command economy in the FSU resulted in increased activities in the informal sector. However despite prevalent delays in wage payments many workers were still observed to be working full-time in theformal sector. Here a model of workers' labour supply decisions incorporates unobservable features of informal activities in both sectors; namely unofficial payments within the formal sector and stigma associated with the informal sector. These extensions result in non-trivial changes to workers' reservation wage conditions and reconcile the unexpected outcomes of workers' labour supply decisions. A limited empirical analysis of Kyrgyz data, for 1993 and1996, provides support for the implications of this framework.