Even if you're settled in your current job and city and see no signs that you'd ever leave, you should always find out the answer to this question. Life can happen quickly. You never know what might force you to move out, so ask your future landlord if you could break the lease or find a subletter to take your place without incurring a huge penalty. Doing so will give you peace of mind, especially if you find yourself in a difficult situation that's forcing you to move.