Vocational education practitioners must participate in professional development (PD) activities so they may implement contemporary teaching practices to support their students. Long-term, social types of activity are best because they benefit individuals and groups of practitioners and the training organisations for which they work. However, training provider managers often favour short and individual activities which are cheaper to resource. Not much has been previously known about the financial and time costs incurred by individual practitioners which may act as a deterrent for practitioners to continue in the sector. Our research addressed that gap for Western Australian VET practitioners by examining data collected from an online survey. The survey collected quantitative information from 30 volunteer WA VET practitioners about their activities in a twelve-month period. Using human capital theory underpinning data analysis, we show that at no stage of a VET practitioner's career was there a positive return on investment for the personally incurred cost of PD. We argue that acts as a deterrent to working as a VET practitioner which has ramifications for training provider operational efficiency, and the wider VET sector. There appears to be a misappropriation of pay scales based on applicable employment conditions which indicates sectoral underpayment.