"I really like working here. I really want to keep working here. And I think I've proven that I'm a very valuable member of the team. But to continue being happ

"I really like working here. I really want to keep working here. And I think I've proven that I'm a very valuable member of the team. But to continue being happy working here I need to receive a raise of $n. Otherwise I'm going to feel like I'm not being fair to the financial future of myself and/or my family." Being direct and firm is really the only way. The threat of quitting is probably better implied than made directly. It feels less like a harsh ultimatum which might trigger a defensive response. You want them to understand that you're not upset at anyone, you're just doing what's best for yourself and/or your family. But it's important to realize that it's usually hard to get a significant raise without changing jobs. Most companies have a very hard time doing this even when it's entirely warranted.