The rule I've heard is that you dress one notch better than the interviewers. E.g., if they will be in jeans, you wear a nice shirt & slacks. If they are in sla

The rule I've heard is that you dress one notch better than the interviewers. E.g., if they will be in jeans, you wear a nice shirt & slacks. If they are in slacks, you add a tie. Etc. I prefer nice shirt & slacks, sometimes with a tie. (Note: Your contact in HR at the company will know the dress code and should be able to give you advice for the expectations of dress code for candidates).