I have been working at my current company for about three years. During the last two, I have been managing a small group of developers and several projects. These responsibilities came gradually, without any change in contract or salary.
Especially during the last year, my responsibilities have been rapidly increasing and my supervisor told me that a promotion was coming for me for the very good job done with them and finally the offer arrived.
Now, here is the catch. As a "regular" employee, as I am now, I'm paid my regular salary plus overtime (more or less 10% or my salary every month). With the new role, I won't be paid overtime and the actual salary increase I have been offered is so low that I would be making less money than what I'm making now. With the new contract, overtime would no longer be paid out, but is considered to be "included" in the total salary. So while I feel I should be compensated more because of this, I could not easily refuse to work overtime.
The "official" explanation I have been given for this situation is that I should see these two things as separate. In a way, I got a salary increase that is not that bad and on the other side I am given a promotion that opens new doors inside the company. On the other side I know that people inside the company with the same "level" I'm offered are paid much more and I'm very disappointed to think that I have been waiting years to get a promotion that is going to reduce my net salary.
At the moment, I have not accepted the offer and I'm trying to think what I can say to negotiate a better deal.
Is there something I can try to say in your opinion? Is this the case where a more aggressive approach may work? Possible actions would include threatening to leave (that is indeed possible) or to stop working overtime (not so easy).