acnev

As stated by someone else before, you are supposed to pay income taxes in all states and cities in which you derive income - this doesn't just apply to the super rich athletes but to all folks. Most companies will not bother with this and generally if your stay is for a week or two it isin't a big deal. I think all the big consulting companies and others that have significant employee population working away from home comply with this. It is a pain in the rear when having to file tax forms for 4 or more states especially ones with convoluted tax returns like CA or NY.

Edited to add: this also applies if you come from a state with no income tax since the money is considered earned where you actually perform the work (i.e. OH in the example above). In general, you don't get double taxed since you normally take a credit from your resident state for the taxes paid to the other state.