This research examines the effects of participative budgeting on budgetary slack under different levels of task uncertainty. It also investigates the mediating factors of goal orientation and job-relevant information in the cognitive and motivational aspects of participative budgeting in situations characterised by task uncertainty. Our comprehensive analytical methodology uses partial least squares structural equation modelling and conditional process modelling. Results reveal that participative budgeting has a significant positive effect on budgetary slack, with this relationship being mediated by goal orientation and job-relevant information. Task uncertainty levels mitigate the mediation effects. However, in situations of low task uncertainty, goal orientation and job-relevant information play an essential role in conveying the effects of participative budgeting on budgetary slack.
