A simple, straightforward Monte Carlo method for handling coagulation of charged particles has been presented in this note, which is essentially by extending a differentially weighted Monte Carlo method. Then the Monte Carlo scheme is applied to a case study of coagulation of bipolarly charged particles. It is shown that the Monte Carlo method proposed can achieve satisfactory results with a very straightforward algorithm and greatly minimized programming efforts. (c) 2013 Elsevier Ltd. All rights reserved.