Tricky. Tricky. Tricky.
I think most people struggle to put a decent outfit together on a daily basis let alone for something important as a job interview. I mean you just have to look at people on the streets of any major city at lunch time. Unkind but true. Have some pride people! There is no need for dressing shabbily even if you don't have a lot of money. In Australia Target and K-mart have great pieces for work as do many of the slightly more expensive chain stores. Rant over.
So, unless you are going for a very creative job I think it's best to err on the side of conservative. You want the interviews to be interested in you and what you are saying, not be distracted by what you are wearing. Though having said that I did go to my last job interview with pink hair....more on that later.
The most conservative and dressy type companies include finance and banking, accounting firms and consultancies and some technology companies. Wear a suit in a dark colour and a nicely pressed shirt or women could also wear a business type dress like this:
Actually this kind of outfit would suit pretty much all interviews and companies unless you are going to a job at a funky creative cutting edge company.
But you don't always have to wear a suit. It's just an easy option. Other options include:
For men: dress pants or suit pants and a long sleeve business shirt. For a more casual company you could possibly do a short sleeve shirt but I can't say I like them. Lace up brogues or slip on more business type shoes. No sneakers. No thongs
For women: Tailored skirts or pants and a blouse or top, no t-shirts. Closed in court shoes. No sneakers and no thongs.
The last interview I went to I didn't have anything that resembled a suit in my wardrobe. I had been working in an industrial part of Sydney for an industrial distributor and suits weren't really the expectation. Plus I'm not really that fussed about suits (even though I am recommending them here). I also had pink hair. My sister was horrified! "what are you going to wear?"
I think I wore a red jacket and black pants to that interview, with the pink hair. You see I figured that this was me. I had really good experience for the job and figured that if they had an issue with my hair, well then maybe that company wasn't for me. You can only be this bold if you are confident in your abilities and yourself generally. I got that job but don't recommend you turn up with coloured hair or lots of facial piercings and visible tattoos. Most interviewers are still very conservative and even though these things don't affect your ability to do the job in most cases you won't get the job. Some exclusions are funky cool hairdressers, where coloured hair, tats and piercing are expected. As well as sneakers or thongs.
If you need some inspiration head over to Pinterest and do a search on work wear or work fashion.