I'm negotiating a raise at my job (entry-level job; I've been at the company for 1+ years). For a lot of reasons (primarily my skill set, accomplishments, & performance), I believe that I'm getting severely underpaid.
I did a lot of research: At first, looking online (glassdoor, linkedin, payscale, etc) and then by talking to people. I spoke to 2 current colleagues at my company, 2 former coworkers, a family-friend recruiter in the industry, and a big manager from a different company (again, a friend). Those people were able to give me solid ranges for what they felt is my competitive market value in my city, especially for those who know what type of work I do on a day-to-day basis.
However, based on non-negotiation conversations that I've had with my manager and with HR, I know that they will likely not believe the numbers I'm hearing (they're majorly higher than what I'm getting now).
I'm at the point where I'm ready to leave the job because of this, but I want to give this December raise conversation my best shot since I do enjoy my job and would like to stay (if I'm compensated better).
I am fairly certain that HR will hear my salary request and tell me my numbers are totally off-base compared to the company's research. What is a productive way to reply to that?
Is there a productive way to reply?
My goal is to find a response which won't end the the negotiation even after they bring up that argument.
This is not a duplicate of this question, which asks about "should I give a range". My question is "how to reply when HR rejects the range".