I have worked part time now for nearly six years. For all of this time I have been paid anything over my contracted twenty hours at overtime rate. Last week I worked thirty hours, I assumed ten at overtime rate. This week Im doing forty hours (full time) .I offered this week as we are short staffed and it never hurts to bank favours. I automatically assumed the forty hours would all be paid at my hourly rate as I offered to work this. I have been taken in the office today and told anything over my twenty hours will be paid at normal time and not overtime until I work more than forty hours and this is the law. Is this true? How is it fair I can work more than my contacted hours and never earn overtime rate ? So I will be working alongside full time workers getting time and a half for the same two hours I will only be getting normal time for . This seems very unfair.