It's true that you won't be double-taxed, but it can definitely cost you to work in a different state, if the other state has higher tax rates. For example if you owe the work state $5,000 and the home state $4,000 (on the same income), you'll be able to take a credit of $4,000 on the home state return, but you'll still owe $5,000 to the work state. Whereas if you lived and worked in the home state, you'd only owe the $4,000. Net loss: $1,000.
The credit doesn't change what you owe to the work state.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
