While unconditional cash transfers have been studied extensively in developing countries, little is known about their effects in a wealthier context. Through a randomized controlled trial, we study the employment effects of a generous and unconditional transfer targeting low-income families in Spain. Two years into the program, subjects assigned to treatment are 20 percent less likely to work than subjects assigned to a control group. Assignment to an activation plan does not attenuate adverse effects; a more lenient transfer withdrawal rate does. It appears that effects are driven by subjects with children, suggesting substitution of labour for care tasks.