For individuals who split their time in two different states throughout the year, now is an excellent time to consider where you may be taxed as a resident for 2015. To make it more likely that the high-tax jurisdiction will respect the move and not continue to tax you as a resident, you should track the number of days you are spending in each jurisdiction. Generally, if you reside in a state for 183 days or more, that state will assert residency and the ability to tax all of your income. Furthermore, if you move to a new state but you maintain significant contacts with the old state (including drivers license, residences, bank accounts and the like), you could run the risk of being taxed as a resident in the old state.