Tax Question for Sign-On Bonus
	
	
		My physician husband, who is a medical fellow in training, recently signed an employment contract to begin work at a hospital when his fellowship ends in 2013.  He received a sign-on bonus this month for the gross amount of $10k.  I assume we will eventually receive a 1099-misc for this amt.  My questions are:
1.  How do we calculate federal and state income tax amounts to pay;
2.  Do we pay FICA on this bonus even though he is not a employee yet?  (ie.  Is this considered SE earnings?)  He has performed no work for these wages, just signed a contract.  
HELP!