Despite substantial endeavours of international institutions and governments around the world to promote decent work, recent years have witnessed resurgence of non-standard and precarious labour practices. This article scrutinises one of the most recently described types of non-standard work, which is known as quasi-formal or under-declared employment. Companies relying on this illegitimate strategy, which is particularly prevalent in Europe, deliberately misreport the take-home pay of their formally employed workers. Alongside the officially declared wage, a quasi-formal worker thus receives an additional cash-in-hand payment which remains untaxed. To explore why so many European Union workers accept quasi-formal jobs in spite of obvious limitations, we report the evidence from interviews with 616 workers who were surveyed within the Special Eurobarometer 284/Wave 67.3. A two-level cumulative logistic regression emphasises tax morale and the exact function of the cash-in-hand payment as the key factors in this respect. On the other hand, neither perceived detection risk nor expected penalties are found to affect the readiness of quasi-formal workers to keep obeying an illegitimate arrangement with their employer. These findings therefore endorse recent studies on the matter, which illuminate low trust in the state and fellow citizens as the main reason for many workers to voluntarily misreport their income.

In spite of a growing body of literature on quasi-formal employment in the European Union (EU), there is still limited knowledge regarding the exact functioning of this illegal employment scheme. To fill this gap, we report data from the 2019 Special Eurobarometer on undeclared work, which reveals that 30.1% of European workers have higher income from employment than reported to tax authorities. Explicitly, 2.6% of registered dependent employees are entitled to cash top-ups to the official wage, for 7.8% of them the amount of supplementary payments depends on the work efforts, whereas 9.2% receive informal remuneration under multiple arrangements. In addition to these ‘regular recipients’, we also found that 10.5% of employees in the EU can be classified as ‘sporadic quasi-formal workers’. Besides showing that wage underreporting is far more pervasive than previously assumed, the study also offers a more nuanced insight into different manifestations of this illicit practice in the EU. Results of a two-level random intercept multinomial logit model reveal that women are less likely to receive fixed and variable cash-in-hand payments, whereas older individuals have a lower propensity to receive work-time-related income. The analysis also highlights that professionals, service sector employees, manual job workers and individuals whose jobs require travelling are more prone to variable wages compared to the rest of the population. Given a modest success in combating the phenomenon to this date, these findings will be particularly valuable for policymakers in their endeavours to devise tailored policy measures.