Since the discovery of N-heterocyclic carbenes (NHCs), their unique properties as ligands in organometallic chemistry have enabled the synthesis of a myriad of novel metal complexes. Thanks to the facile modulation of this class of ligands, they can be easily functionalized with ionic tags, which has proven to be useful for various applications. Notably, such groups have enabled the immobilization of metal complexes on a variety of supports, and recyclable catalysis could be realized. This chapter describes organometallic species featuring ionically-tagged NHCs for such applications, focusing on catalytic systems that show the best performance in terms of versatility and reusability.