Using propensity score matching, this paper assesses the effects of tackling illicit financial flows (IFFs) on domestic tax revenue mobilization in developing countries. It uses data on countries’ compliance with Financial Action Task Force (FATF) Recommendations as treatment variable and involves 67 developing countries around the world. We find that countries which comply with FATF Recommendations (Cooperatives countries) record higher values of domestic tax revenue in comparison with those which do not comply with those Recommendations (Non-cooperatives countries). Otherwise, Cooperatives countries outperform Non-cooperatives countries in terms of domestic tax revenue mobilization. More interestingly, the extent of this adverse impact depends on tax structure: goods and services taxes are more affected, followed by VAT and excise taxes. Our results suggest that developing countries could mobilize more domestic tax revenue by implementing policies to curtail IFFs. Moreover, they should establish sound institutions.