Your employer may be withholding CITY income tax, in addition to state income tax. You are subject to paying both MO state and city tax. But, when you file your KS state return, KS will give you a credit for taxes paid to MO (both city and state). MO has higher tax than KS (6% top rate vs 4.6% plus city), so you will not get full credit fro KS. So, you are probably looking at 2% more of your total salary (not just the $8000 raise) going to state & city tax
