It's (mostly) not a time-based decision. I say "mostly" because less than a year, without good explanation, can be a detrimental factor on your CV. Two years

It's (mostly) not a time-based decision. I say "mostly" because less than a year, without good explanation, can be a detrimental factor on your CV. Two years is probably good. But ... rules are made to be broken: don't stay if it's really bad, or something really good comes up. Other than that, it's more about how you feel in the job than the time you've been there. Do you feel valued by your employer? Respected even? Are you making an impact? Are you learning? Enjoying the challenge? Even content to just cruise? Or are you stifled? Exploited? Bored? Even bitter? In my experience, it's not hard to know when it's time to move.