This paper examines how labor taxation (personal income taxes and social security contributions) in the Western Balkan contributes to labor market outcomes such as high informality and a significant gender gap in participation rates. We find that limited progressivity combined with high tax wedge on low incomes poses a major twin equity-efficiency challenge in the region, resulting in low redistributive capacity and inadequate incentives to enter the job market. Policy implications are discussed with a view to alleviating the excessively high tax wedges on low incomes, while improving progressivity of income taxation.