There are people who can walk in, demand a raise and get what they want. I know I ain't one of them. There are people who can play it close to the vest and go home with someone else's shirt, boots, and wallet. Maybe that's you.

What is your company's policy on employee reviews?

Do they conduct them according to schedule?

Seeing as you've been there about six months, an informal review is the way to gain information for when the formal review happens. Find out how your boss is coping with turnover...maybe it's intentional, maybe not. Find out how he perceives the motivations of the people who left. If it's framed as disloyalty, that's a bad thing. If it's framed as natural progression, then that suggests how much leverage you have in regard to framing compensation to future growth. Negotiations are all about information.

Maybe your boss thinks you're underpaid but can't give you a raise until you ask. Maybe your boss can only give raises at reviews and according to a formula...that formality is actually good so long as the process is reasonably fair (and if it's not reasonably fair then the formality isn't worse).

Even if you are the demand a raise and get it type, more information doesn't hurt. But you can't demand unless you're ready to walk. Don't fool yourself into believing that your boss hasn't already read the tells that you are happy and unlikely to leave even without a raise.

Good luck. Good luck.