your rate should go up at least as much as the time spent working. so you are right to think that. However, an employer isn't obligated to give a pay raise on e

your rate should go up at least as much as the time spent working. so you are right to think that. However, an employer isn't obligated to give a pay raise on every offer. an offer is just that, it's not the same as a raise. If they project to you that it is a raise in pay while its not, then that's actually not ethical, and depending on the wording and where you live might even be in breach of some terms/laws. For example in my country it's not really allowed to reduce someone's pay, but if you agree to it and sign it is allowed. (so they can offer it and you are allowed to deny it without that reflecting back on you negatively...). This means that if they would want to lower your pay they will think of something creative like the offer you got, to try and reduce pay compared to productivity and wrapping it up in something that might get accepted by someone who doesn't dig a bit deeper. I would advise just to make a counter offer, and say what you explained here, 'if i'm working 25% more i expect that much more in pay' , or if the other job is actually paying you MORE than these extra hours would yield you, you can even haggle with that and tell them the other job's hours are worth more to you. don't accept anything that feels like a step back, if your employer insists in putting you down like that, perhaps it's time to find a more decent employer.