The IMC Rating should be something which anyone intent on 'hours building' in the UK for a modular CPL ought to consider. The temptation to press on towards that elusive hours goal in marginal weather becomes far less hazardous when you have the added safety insurance of an IMC Rating. For that reason alone, I never charge anything when I conduct IMC Rating initial Skill Tests, revalidations or renewals. I would far sooner someone spent their money on becoming a safer pilot and the idea behind this policy is to offer them some practical encouragement.