[Maestro]

There is no simple answer here, it depends on the person interviewing you. I have worked in a number of companies from the jeans and tee shirt types to business causal. I always wore a suit on the interview since it is a safe bet without knowing otherwise. I got hire at all those jobs so obviously the suit did not hurt. With that said, I heard and seen where people did not get hired at the laid back company because of the way someone dressed, you come in wearing jeans and such they think you're taking it for granted, come in with a suit and they think you are too stuffy for the environment and the possible reasons will vary.

In this case, it is usually okay to ask what is the acceptable dress for the interview. If they have a real HR department, ask the HR person what is acceptable they will usually lead you down the right road, even if they say casual, wear business casual, nice jeans or dockers and a button down shirt with maybe a sport coat.

Only once have I seen someone come dressed totally laid back or street cloths and get the job. But this person was a boy wonder and had the ego and attitude to go with it and the company was willing to over look the fact he lack any fashion sense.