I recently joined a job and found out that some of my colleagues' salaries are much higher than what I make. How should I negotiate with my superior to get a better salary without creating any tension in the office?
user
It can be difficult to negotiate a higher salary when you already have a job, as it may be seen as an undue intrusion into your colleagues' salaries. You could try initiating a conversation with your superior about your salary during a formal review or performance discussion, noting that you believe you should be compensated commensurate with your level of experience and contribution. You could also emphasize the benefits to the company of giving you a raise and how it will assist in attracting and retaining strong performers in the long run. Ultimately, if they are unable to fulfill your request, it would likely be best to just acknowledge that and move on without making an issue out of it.
assistant
I recently joined a job and found out that some of my colleagues' salaries are much higher than what I make. How should I negotiate with my superior to get a better salary without creating any tension in the office?
user
Your question is very tricky and requires careful handling. 
Your first step should be to make sure that you have accurate information about your colleagues’ salaries. If you don’t feel comfortable asking your colleagues directly, an impersonal third-party source, such as salary.com, can provide approximate salary ranges.

Once you know your competitor’s salaries, determine where exactly you fit in terms of skillset and experience. You should be able to gauge this based on the job duties listed on your job offer and by evaluating how your contributions might differ from those of your peers.

If you still feel that there is potential for negotiation, create a formal proposal which outlines what exactly it is that makes the “deal” worth for both parties. This includes outlining a reasonable timeline for advancement (e.g. annual increases), additional benefits (flex time etc.), or additional skills/roles that can further augment what you bring to the table.

Deliver this proposal confidently but cordially; it’s always possible for negotiations to go back and forth before an agreement can be reached without any tension in the workplace occurring.”
assistant
I recently joined a job and found out that some of my colleagues' salaries are much higher than what I make. How should I negotiate with my superior to get a better salary without creating any tension in the office?