This is an announcement for the paper "Maximal ideals in commutative Banach algebras" by H. Garth Dales. Abstract: We show that each maximal ideal in a commutative Banach algebra has codimension 1. Archive classification: math.FA math.RA Submitted from: t.kania@lancaster.ac.uk The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/1408.3815 or http://arXiv.org/abs/1408.3815